C# 锁机制全景与高效实践：从 Monitor 到 .NET 9 全新 Lock

小馬文玩 發表於 2025-6-12 10:19:00

C# 锁机制全景与高效实践：从 Monitor 到 .NET 9 全新 Lock

<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">引言：线程安全与锁的基本概念</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">线程安全</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">在多线程编程中，保障共享资源的安全访问依赖于有效的线程同步机制。理解并处理好以下两个核心概念至关重要：</p>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>线程安全：指某个类、方法或数据结构能够在被多个线程同时访问或修改时，依然保持内部状态的一致性，并产生预期的结果。这通常意味着需要对共享状态（如全局变量、静态变量或对象实例字段）的并发访问进行有效管控，防止数据损坏或不一致性。</li>
<li>竞态条件 (Race Condition)：是一种典型的并发缺陷。当多个线程在缺乏适当同步机制的情况下，无序地、竞争性地访问或修改共享资源时，程序执行结果变得依赖于无法预测的线程调度时序（即执行顺序）。这种不确定性常常会导致数据错误、程序崩溃或行为异常。竞态条件是线程安全缺失的直接体现。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">锁的基本概念</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>锁的本质：锁是一种同步工具，用于确保共享资源的互斥访问（一次只有一个线程使用）。当一个线程获得锁并执行被保护的代码段（临界区）时，其他试图获取同一锁的线程会被阻塞或等待，直到锁被释放。</li>
<li>锁的目标：在保证正确性的前提下，最大化并发度和系统吞吐量，最小化延迟。</li>
<li>锁的代价：
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0">
<li>阻塞开销：操作系统调度上下文切换的成本。</li>
<li>自旋开销：忙等待消耗CPU周期。</li>
<li>死锁风险：线程因相互等待对方释放锁而永久僵持。</li>
<li>优先级反转：低优先级线程持有高优先级线程需要的锁。</li>
<li>复杂性：使用不当可能导致程序难以理解和调试。</li>
<li>选择锁的依据：临界区大小、等待时间长短、竞争激烈程度、读/写比例、进程边界、公平性要求等。</li>
</ul>
</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">1. Monitor</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor</code>类提供了一种互斥锁机制，确保同一时间只有一个线程可以访问临界区。它是C#中<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">lock</code>语句的基础，通过<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor.Enter</code>和<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor.Exit</code>实现锁的获取和释放。</p>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">基于对象的内部 SyncBlock 索引关联的一个系统锁对象。每个.NET对象在堆上分配时，都有一个关联的 Sync Block Index (SBI)。当首次对这个对象使用 lock 时，SBI 被分配并指向操作系统内核中的一个真正的锁对象（比如 Windows 的 CRITICAL_SECTION）。</p>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">当锁已被占用时，后续请求的线程会进入内核等待状态，发生上下文切换。</p>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">Monitor.Wait(object obj), Monitor.Pulse(object obj), Monitor.PulseAll(object obj) 提供了在锁内等待特定条件成立的能力（类似 ConditionVariable），可用于构建生产者-消费者模式等。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">lock</code>语句是使用<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor</code>的简便方式：</p>
<pre class="language-csharp highlighter-hljs"><code>private readonly object _lock = new object();

lock (_lock)
{
    // 临界区代码
}</code></pre>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">等价于：</p>
<pre class="language-x86asm highlighter-hljs"><code>Monitor.Enter(_lock);
try
{
    // 临界区代码
}
finally
{
    Monitor.Exit(_lock);
}</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>保护共享变量或非线程安全的集合</li>
<li>确保单一线程修改资源，如更新计数器或列表</li>
<li>需要简单互斥的临界区</li>
<li>临界区执行时间相对较长（大于上下文切换开销）</li>
<li>锁竞争不是极端激烈</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用私有对象（如<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">private readonly object _lock = new object();</code>）进行锁定，避免死锁。</li>
<li>保持临界区尽可能短，减少锁竞争。</li>
<li>避免锁定公共对象或类型（如<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">typeof(MyClass)</code>），因为其他代码可能也会锁定它们。</li>
<li>不要在锁内调用不可控的外部代码，可能导致死锁。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用简单，<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">lock</code>语句语法直观。</li>
<li>对于短临界区效率较高。</li>
<li>Monitor 锁是可重入（Reentrancy）的。同一个线程可以多次获得同一个锁对象上的锁（进入嵌套的 lock 块）。计数器会增加，只有等计数器归零时锁才会被释放。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>可能导致死锁，如果锁使用不当。Monitor.TryEnter(object obj, int timeoutMilliseconds) 允许设置等待超时，是避免死锁的重要手段。</li>
<li>不支持多读单写场景。</li>
<li>.NET 的 Monitor 锁是非公平的（Windows CLR 实现）。当锁释放时，操作系统从等待队列中选择下一个唤醒的线程是不确定的，不一定是最早等待的那个（这有助于提高吞吐量，但可能导致某些线程“饥饿”）。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">2. System.Threading.Lock</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">System.Threading.Lock</code>是.NET 9（C# 13）引入的新同步原语，旨在提供比<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor</code>更高效的互斥锁机制。它通过<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">EnterScope</code>方法支持<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">using</code>语句，确保锁自动释放，降低死锁风险。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">直接使用：</p>
<pre class="language-csharp highlighter-hljs"><code>private readonly Lock _lock = new Lock();

using (_lock.EnterScope())
{
    // 临界区代码
}</code></pre>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">或在C# 13及以上版本中使用<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">lock</code>语句：</p>
<pre class="language-csharp highlighter-hljs"><code>lock (_lock)
{
    // 临界区代码
}</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>与<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor</code>类似，用于保护共享资源。</li>
<li>适用于需要高性能的场景，如高并发系统。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用私有<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Lock</code>实例。</li>
<li>利用<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">using</code>语句确保锁自动释放。</li>
<li>避免将<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Lock</code>对象转换为<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">object</code>或其他类型，以防止编译器警告。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>性能比<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor</code>高约25%。</li>
</ul>
<pre class="language-ruby highlighter-hljs"><code>| Method                   | Mean      | Error    | StdDev   | Ratio | Gen0   | Allocated | Alloc Ratio |
|------------------------- |----------:|---------:|---------:|------:|-------:|----------:|------------:|
| CountTo1000WithLock      | 107.22 us | 1.561 us | 1.460 us |  1.00 | 0.1221 |   1.06 KB |        1.00 |
| CountTo1000WithLockClass |  75.73 us | 0.884 us | 0.827 us |  0.71 | 0.1221 |   1.05 KB |        0.99 |</code></pre>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Dispose</code>模式自动释放锁，降低死锁风险。</li>
<li>与<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">lock</code>语句无缝集成，语法简洁。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>需要.NET 9或更高版本。</li>
<li>开发者对其熟悉度较低。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">3. Mutex</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li><code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Mutex</code>（互斥锁）是一种支持进程间同步的互斥锁机制，确保只有一个线程或进程访问共享资源。</li>
<li>可以通过命名互斥锁实现跨进程同步。</li>
<li>比 Monitor/lock 重得多（涉及系统调用）。</li>
<li>支持安全访问系统资源（如文件、硬件设备句柄）。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<pre class="language-java highlighter-hljs"><code>private static Mutex _mutex = new Mutex();

_mutex.WaitOne();
// 临界区代码
_mutex.ReleaseMutex();</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>跨进程同步，如确保应用程序的单一实例运行。</li>
<li>保护共享资源，如文件或数据库。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用命名互斥锁（如<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">new Mutex(false, "MyAppMutex")</code>）进行进程间同步。</li>
<li>尽快释放互斥锁，减少阻塞时间。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">注意</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>重入性：命名 Mutex 默认是可重入的（同一个线程）。匿名（未命名）Mutex 在 .NET Framework 默认可重入，在 .NET Core+ 中默认为 .NoRecursion 行为。</li>
<li>自动释放：如果持有 Mutex 的线程终止（例如崩溃），操作系统会自动释放锁（这可能导致程序逻辑错误），并且下一个等待的线程可能接收到 AbandonedMutexException。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>支持进程间同步。</li>
<li>提供可靠的互斥访问。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>由于涉及内核模式转换，性能较低。</li>
<li>开销较大，不适合高频短临界区。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">4. SpinLock</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">SpinLock</code>是一种互斥锁，线程在尝试获取锁时会通过自旋（循环检查）等待锁可用，适用于极短的临界区。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<pre class="language-csharp highlighter-hljs"><code>private SpinLock _spinLock = new SpinLock();

bool lockTaken = false;
try
{
    _spinLock.Enter(ref lockTaken);
    // 临界区代码
}
finally
{
    if (lockTaken)
    {
        _spinLock.Exit();
    }
}</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>极短的临界区，锁持有时间短于上下文切换成本。</li>
<li>高并发场景，锁竞争频繁但持续时间短。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>仅用于极短临界区。</li>
<li>避免在低竞争或长临界区场景中使用。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>对于短临界区开销低。</li>
<li>无上下文切换。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>如果锁持有时间长，会浪费CPU周期。</li>
<li>不适合长临界区。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">5. ReaderWriterLockSlim</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">ReaderWriterLockSlim</code>允许多个线程同时读取资源，但写操作互斥，且写时不允许读操作，适合读多写少的场景。</p>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">有几种不同的锁定模式：</p>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>读取锁 (Read Lock)：共享模式，允许多个线程同时持有。</li>
<li>写入锁 (Write Lock)：独占模式，一旦持有，排斥所有读取锁和其他写入锁。</li>
<li>可升级读取锁 (Upgradeable Read Lock)：一种特殊模式，允许一个读取线程在持有读锁的同时，后续有需要时可以原子性地升级 (Upgrade)为写入锁（避免先释放读锁再尝试拿写锁过程中出现竞态或死锁）</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<pre class="language-csharp highlighter-hljs"><code>private readonly ReaderWriterLockSlim _rwLock = new ReaderWriterLockSlim();

public string ReadData()
{
    _rwLock.EnterReadLock(); // 获取读锁
    try
    {
        // 安全读取共享数据
        return _cachedData;
    }
    finally
    {
        _rwLock.ExitReadLock(); // 释放读锁
    }
}

public void UpdateData(string newData)
{
    _rwLock.EnterWriteLock(); // 获取写锁
    try
    {
        // 安全更新共享数据
        _cachedData = newData;
    }
    finally
    {
        _rwLock.ExitWriteLock(); // 释放写锁
    }
}

// 使用可升级锁 (避免“写者饥饿”风险):
public void UpdateIfCondition(string newData, Func<bool> condition)
{
    _rwLock.EnterUpgradeableReadLock(); // 获取可升级读锁
    try
    {
        if (condition())
        {
            _rwLock.EnterWriteLock(); // 升级为写锁
            try
            {
                // 安全更新共享数据
                _cachedData = newData;
            }
            finally
            {
                _rwLock.ExitWriteLock(); // 降级回可升级读锁
            }
        }
    }
    finally
    {
        _rwLock.ExitUpgradeableReadLock(); // 释放锁
    }
}</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>读操作频繁、写操作较少的场景，如缓存系统。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>确保写操作快速，减少读线程阻塞。</li>
<li>避免长时间持有写锁，防止写者饥饿。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">注意</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>ReaderWriterLockSlim 性能更好，语义更清晰，设计更合理。强烈建议总是使用 ReaderWriterLockSlim 而不是 ReaderWriterLock。</li>
<li>性能特征：在纯读场景下并发度接近无锁；写操作开销比普通互斥锁略高（需要管理读写状态转换）；升级操作开销适中。</li>
<li>公平性与策略：提供了构造参数 LockRecursionPolicy.NoRecursion / .SupportsRecursion 和 ReaderWriterLockSlim(lockRecursionPolicy) 来控制递归行为。也涉及公平性问题（如读者优先或写者优先，ReaderWriterLockSlim 有机制防止写者饿死）。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>允许多个线程同时读取，提高性能。</li>
<li>适合读多写少场景。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用复杂，需管理读写锁状态。不恰当地嵌套获取不同类型的锁（特别是尝试升级锁失败时等待其他锁）会导致死锁。</li>
<li>可能导致写者饥饿。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">6. Semaphore 和 SemaphoreSlim</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li><code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Semaphore</code>控制对资源池的并发访问，限制同时访问的线程数。</li>
<li><code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Semaphore</code>：内核模式，支持跨进程、命名。</li>
<li>SemaphoreSlim：轻量级用户模式实现（必要时退化到内核），仅进程内有效，性能开销远小于 Semaphore。<strong style="color: rgba(53, 148, 247, 1); font-weight: bold; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); width: auto; height: auto; border-radius: 0; border: 3px none rgba(0, 0, 0, 0.4); padding: 0; margin: 0">绝大多数进程内场景应优先使用 SemaphoreSlim。</strong></li>
<li>SemaphoreSlim 默认使用公平队列（FIFO），有助于防止饥饿。Semaphore 的公平性由操作系统决定。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<pre class="language-java highlighter-hljs"><code>private Semaphore _semaphore = new Semaphore(3, 3); // 初始和最大计数

//WaitOne/WaitAsync：尝试获取一个令牌（信号）。若无可用令牌则阻塞/异步等待
_semaphore.WaitOne();
// Release：释放一个令牌
_semaphore.Release();</code></pre>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">SemaphoreSlim</code>使用方式类似。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>限制并发访问特定资源的数量（API调用限流、连接池控制、异步任务并发度控制）。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Semaphore</code>进行进程间同步，<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">SemaphoreSlim</code>用于进程内。</li>
<li>设置合理的初始和最大计数。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>灵活控制并发级别。</li>
<li><code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">SemaphoreSlim</code>性能较高。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用较复杂。</li>
<li>可能导致死锁。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">7. EventWaitHandle、AutoResetEvent、ManualResetEvent、ManualResetEventSlim</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">事件用于线程间信号传递。<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">AutoResetEvent</code>在信号一个等待线程后自动重置；<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">ManualResetEvent</code>保持信号状态直到手动重置；<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">ManualResetEventSlim</code>是轻量级版本。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">AutoResetEvent</code>示例：</p>
<pre class="language-java highlighter-hljs"><code>private AutoResetEvent _event = new AutoResetEvent(false);

_event.WaitOne(); // 等待信号
// 执行操作

_event.Set(); // 发送信号</code></pre>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">ManualResetEvent</code>示例：</p>
<pre class="language-java highlighter-hljs"><code>private ManualResetEvent _event = new ManualResetEvent(false);

_event.WaitOne(); // 等待信号
// 执行操作

_event.Set(); // 发送信号
_event.Reset(); // 重置事件</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>生产者-消费者模式。</li>
<li>等待特定任务完成。</li>
<li>启动/停止信号广播、一次性初始化完成指示。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>使用<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">AutoResetEvent</code>进行一对一信号传递。</li>
<li>使用<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">ManualResetEvent</code>广播信号给多个线程。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>提供简单的信号传递机制。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>状态管理复杂，尤其是<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">ManualResetEvent</code>。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">8. CountdownEvent</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">初始化一个计数（N）。线程调用 Signal() 来递减计数。当计数达到0时，所有在该对象上 Wait() 的线程被释放。适用于“N个任务完成后继续”的场景。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<pre class="language-java highlighter-hljs"><code>private CountdownEvent _countdown = new CountdownEvent(3);

_countdown.Wait(); // 等待计数归零
// 执行操作

_countdown.Signal(); // 减少计数</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>主线程等待一组分散操作的完成，模拟部分 Task.WaitAll 效果但有更多控制（可在操作执行过程中动态调整计数）。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>设置正确的初始计数。</li>
<li>确保所有信号都发送，避免死锁。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>便于等待多个事件。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>仅限于计数场景。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">9. Barrier</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">允许多个线程分阶段执行任务，并确保所有参与线程在一个共同的屏障点（Phase）同步汇合（都到达后）才能继续下一阶段。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<pre class="language-java highlighter-hljs"><code>private Barrier _barrier = new Barrier(3);

_barrier.SignalAndWait(); // 信号并等待其他线程
// 继续执行</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>并行算法中协调多个线程的阶段，如分治算法、复杂数据并行流水线处理。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>确保所有参与者调用<code style="background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">SignalAndWait</code>。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>协调多线程分阶段执行。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>设置复杂，需确保所有线程参与。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">10. SpinWait</span></h2>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">原理</span></h4>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器"><code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">SpinWait</code>通过自旋等待条件成立，适合短时间等待。</p>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">操作方式</span></h4>
<pre class="language-javascript highlighter-hljs"><code>SpinWait.SpinUntil(() => someCondition);</code></pre>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">应用场景</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>短时间等待条件成立，如检查标志位。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">最佳实践</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>用于预期很快满足的条件。</li>
<li>避免长时间自旋。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">优点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>避免上下文切换。</li>
</ul>
<h4 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: block; flex-direction: unset; float: unset; height: auto; justify-content: unset; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 18px; color: rgba(37, 181, 86, 0.77); line-height: 1.5em; letter-spacing: 0; align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: inline-block; font-weight: bold; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; border-top: 1px none rgba(0, 0, 0, 1); border-right: 1px none rgba(0, 0, 0, 1); border-bottom: 2px solid rgba(37, 181, 86, 0.77); border-left: 1px none rgba(0, 0, 0, 1); padding: 2px 10px; margin: 0">缺点</span></h4>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>长时间等待浪费CPU资源。</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">11. 无锁替代</span></h2>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0" data-tool="mdnice编辑器">
<li>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0">不可变性 (Immutability)：一旦创建对象就不可修改。避免了修改引起的同步需求（readonly 字段，记录类型 record）。</p>
</li>
<li>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0">线程本地存储 (Thread-Local Storage - TLS)：ThreadStaticAttribute, AsyncLocal 变量，ThreadLocal。每个线程使用自己独立的数据副本（适用性有限）。</p>
</li>
<li>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0">Interlocked 类：提供对简单类型（int, long, IntPtr, float, double, object 引用）执行原子操作的静态方法（Increment, Decrement, Add, Exchange, CompareExchange）。是最轻量级的“锁”，基于 CPU 的原子指令实现，性能极高，无锁开销。</p>
<pre class="language-csharp highlighter-hljs"><code>private int _counter = 0;
public void IncrementSafely()
{
    Interlocked.Increment(ref _counter); // 原子+1
}
public void SetIfEqual(int newValue, int expected)
{
    Interlocked.CompareExchange(ref _counter, newValue, expected); // CAS
}</code></pre>
</li>
<li>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0">基于任务的异步模式 (TAP) 与 Task：</p>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0">
<li>Channel (System.Threading.Channels)：.NET Core 2.1+ 引入。高性能、无锁/有界可选的生产者-消费者队列替代方案（取代 BlockingCollection 和无锁队列手动实现）。支持单/多生产者、单/多消费者。是编写异步管道、处理背压 (Backpressure) 的首选。</li>
</ul>
<pre class="language-csharp highlighter-hljs"><code>var channel = Channel.CreateUnbounded<T>();
// 生产者
await channel.Writer.WriteAsync(item);
// 消费者
while (await channel.Reader.WaitToReadAsync())
    while (channel.Reader.TryRead(out var item)) { ... }</code></pre>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0">
<li>ValueTask / IValueTaskSource：Task 的轻量级替代（减少了堆分配），尤其在同步完成路径上优化显著。</li>
</ul>
</li>
<li>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0">Immutable Collections (System.Collections.Immutable)：提供线程安全的不可变集合，通过原子替换整个集合引用来“修改”数据。读操作非常高效（无需锁），写操作创建新集合，适合读远多于写的共享数据。</p>
</li>
<li>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0">专为并发访问设计的内置集合：</p>
<ul style="list-style-type: disc; color: rgba(0, 0, 0, 1); padding: 0 0 0 25px; margin: 8px 0">
<li>ConcurrentDictionary<TKey, TValue>：高效、低锁竞争、可并行的字典。</li>
<li>ConcurrentQueue / ConcurrentStack：先进先出(FIFO) / 后进先出(LIFO)队列，基于CAS实现，避免锁争用。</li>
<li>BlockingCollection：有界/无界生产者-消费者队列（底层使用 ConcurrentQueue 等），提供 Take() 阻塞语义（Channel 通常是更好的异步选择）。支持优雅取消和完成通知。</li>
</ul>
</li>
</ul>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">12. 结语</span></h2>
<p style="color: rgba(43, 43, 43, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; text-indent: 0; padding: 8px 0; margin: 0" data-tool="mdnice编辑器">选择合适的同步原语取决于应用程序需求，如是否需要进程间同步、读写分离或高性能。<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">System.Threading.Lock</code>是C# 13 中的新选择，性能优于<code style="color: rgba(53, 148, 247, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0; background: none left top / auto no-repeat scroll padding-box border-box rgba(27, 31, 35, 0.05); width: auto; height: auto; border-radius: 4px; overflow-wrap: break-word; font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace; word-break: break-all; border-top: 3px none rgba(0, 0, 0, 1); border-right: 3px none rgba(0, 0, 0, 0.4); border-bottom: 3px none rgba(0, 0, 0, 0.4); border-left: 3px none rgba(0, 0, 0, 0.4); padding: 2px 4px; margin: 0 2px">Monitor</code>，适合大多数互斥场景。开发者应根据场景权衡性能、复杂性和功能，确保线程安全的同时避免死锁和性能瓶颈。</p>
<h2 style="align-items: unset; background: none left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; display: flex; flex-direction: unset; float: unset; height: auto; justify-content: center; line-height: 1.5em; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0; margin: 30px 0 15px; border: 1px none rgba(0, 0, 0, 1)" data-tool="mdnice编辑器"><span class="content" style="font-size: 22px; line-height: 1.8em; letter-spacing: 0; align-items: unset; background: linear-gradient(0deg, rgba(231, 247, 252, 1) 40%, rgba(0, 0, 0, 0) 40%) left top / auto no-repeat scroll padding-box border-box rgba(0, 0, 0, 0); border-radius: 0; box-shadow: none; color: rgba(112, 188, 234, 1); display: block; font-weight: bold; font-style: normal; flex-direction: unset; float: unset; height: auto; justify-content: unset; overflow-x: unset; overflow-y: unset; position: relative; text-align: left; text-indent: 0; text-shadow: none; transform: none; width: auto; -webkit-box-reflect: unset; padding: 0 10px 0 0; margin: 0; border: 1px none rgba(0, 0, 0, 1)">13. 附件表格对比</span></h2>
<table style="display: table; text-align: left">
<thead>
<tr><th style="color: rgba(89, 89, 89, 1); font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; font-weight: bold; width: auto; height: auto; border-radius: 0; min-width: 85px; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>同步原语</div>
</th><th style="color: rgba(89, 89, 89, 1); font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; font-weight: bold; width: auto; height: auto; border-radius: 0; min-width: 85px; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>互斥性</div>
</th><th style="color: rgba(89, 89, 89, 1); font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; font-weight: bold; width: auto; height: auto; border-radius: 0; min-width: 85px; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>允许多读</div>
</th><th style="color: rgba(89, 89, 89, 1); font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; font-weight: bold; width: auto; height: auto; border-radius: 0; min-width: 85px; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>进程间支持</div>
</th><th style="color: rgba(89, 89, 89, 1); font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; font-weight: bold; width: auto; height: auto; border-radius: 0; min-width: 85px; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>性能</div>
</th><th style="color: rgba(89, 89, 89, 1); font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; font-weight: bold; width: auto; height: auto; border-radius: 0; min-width: 85px; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>示例用例</div>
</th><th style="color: rgba(89, 89, 89, 1); font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; font-weight: bold; width: auto; height: auto; border-radius: 0; min-width: 85px; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是否支持可重入</div>
</th></tr>
</thead>
<tbody style="font-size: 14px; line-height: 1.5em; letter-spacing: 0.02em; text-align: left; font-weight: normal; border-image: initial; border: 0">
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(255, 255, 255, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>Monitor</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>高</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>保护共享变量</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(248, 248, 248, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>System.Threading.Lock</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>极高</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>高性能互斥锁</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(255, 255, 255, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>Mutex</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>低</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>进程间同步</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(248, 248, 248, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>SpinLock</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>极高</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>极短临界区</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(255, 255, 255, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>ReaderWriterLockSlim</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是（写）</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>中</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>读多写少资源</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(248, 248, 248, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>Semaphore</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>中</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>限制并发访问</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(255, 255, 255, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>SemaphoreSlim</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>高</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>进程内并发控制</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(248, 248, 248, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>EventWaitHandle</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>是</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>中</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>线程/进程间信号传递</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(255, 255, 255, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>ManualResetEventSlim</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>高</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>进程内信号传递</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(248, 248, 248, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>CountdownEvent</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>中</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>等待多个信号</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(255, 255, 255, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>Barrier</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>中</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>分阶段线程执行</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(248, 248, 248, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>Interlocked</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>极高</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>原子操作</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
<tr style="color: rgba(89, 89, 89, 1); background: none left top / auto no-repeat scroll padding-box border-box rgba(255, 255, 255, 1); width: auto; height: auto">
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>SpinWait</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>无</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>高</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>短时间自旋等待</div>
</td>
<td style="min-width: 85px; border-radius: 0; border: 1px solid rgba(204, 204, 204, 0.4); padding: 5px 10px; text-align: left">
<div>否</div>
</td>
</tr>
</tbody>
</table>
<blockquote class="custom-blockquote multiquote-1" style="border-radius: 8px; background: none left top / auto no-repeat scroll padding-box border-box rgba(64, 184, 250, 0.1); width: auto; height: auto; box-shadow: 0 0 rgba(0, 0, 0, 0); display: block; overflow-x: auto; overflow-y: auto; border: 1px solid rgba(64, 184, 255, 0.4); padding: 10px 10px 10px 20px; margin: 20px 0" data-tool="mdnice编辑器"><span style="display: block; color: rgba(64, 184, 250, 0.5); font-size: 28px; line-height: 1.5em; letter-spacing: 0; text-align: left; font-weight: bold">❝</span>
<p style="text-indent: 0; color: rgba(59, 59, 59, 1); font-size: 14px; line-height: 1.8em; letter-spacing: 0.02em; text-align: left; font-weight: normal; padding: 8px 0; margin: 0"><strong><span style="color: rgba(255, 0, 0, 1)">由于资料验证范围太广，难免会有遗漏，如果上述表格内的内容有问题，请在评论区告诉我</span></strong></p>
</blockquote>

</div>
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<p>
本文来自博客园，作者：AI·NET极客圈，转载请注明原文链接：https://www.cnblogs.com/code-daily/p/18924622
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来源：https://www.cnblogs.com/code-daily/p/18924622

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