Linux C++ 使用condition实现阻塞队列的方法
<p><span><strong>实例如下：</strong></span></p><div class="jb51code">
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<div class="line number1 index0 alt2"><code class="xhtml plain">/*</code></div>
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<code class="xhtml spaces"> </code><code class="xhtml plain">* BlockingQueue.h</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">*</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">* Created on: 2014年6月10日</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">* Author: </code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">*/</code>
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<div class="line number8 index7 alt1"><code class="xhtml plain">#ifndef BLOCKINGQUEUE_H_</code></div>
<div class="line number9 index8 alt2"><code class="xhtml plain">#define BLOCKINGQUEUE_H_</code></div>
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<code class="xhtml plain">#include <</code><code class="xhtml keyword">iostream</code><code class="xhtml plain">></code>
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<code class="xhtml plain">#include <</code><code class="xhtml keyword">pthread.h</code><code class="xhtml plain">></code>
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<div class="line number14 index13 alt1"><code class="xhtml plain">using namespace std;</code></div>
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<code class="xhtml plain">//template <</code><code class="xhtml keyword">typename</code> <code class="xhtml plain">T ></code>
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<div class="line number17 index16 alt2"><code class="xhtml plain">class BlockingQueue</code></div>
<div class="line number18 index17 alt1"><code class="xhtml plain">{</code></div>
<div class="line number19 index18 alt2"><code class="xhtml plain">public:</code></div>
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<code class="xhtml spaces"> </code><code class="xhtml plain">BlockingQueue();</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">BlockingQueue(int capacity);</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">~BlockingQueue();</code>
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<div class="line number23 index22 alt2"> </div>
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<code class="xhtml spaces"> </code><code class="xhtml plain">bool push(int item);</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">int poll();</code>
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<div class="line number26 index25 alt1"> </div>
<div class="line number27 index26 alt2"><code class="xhtml plain">private:</code></div>
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<code class="xhtml spaces"> </code><code class="xhtml plain">int capacity;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">int* queue;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">int head,tail;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_t mutex;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_t notFull,notEmpty;</code>
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<div class="line number33 index32 alt2"><code class="xhtml plain">};</code></div>
<div class="line number34 index33 alt1"> </div>
<div class="line number35 index34 alt2"> </div>
<div class="line number36 index35 alt1"><code class="xhtml plain">#endif /* BLOCKINGQUEUE_H_ */</code></div>
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<div class="line number1 index0 alt2"><code class="xhtml plain">/*</code></div>
<div class="line number2 index1 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">* BlockingQueue.cpp</code>
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<div class="line number3 index2 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">*</code>
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<div class="line number4 index3 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">* Created on: 2014年6月10日</code>
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<div class="line number5 index4 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">* Author: </code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">*/</code>
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<div class="line number7 index6 alt2"><code class="xhtml plain">#include "../include/BlockingQueue.h"</code></div>
<div class="line number8 index7 alt1"> </div>
<div class="line number9 index8 alt2"><code class="xhtml plain">BlockingQueue::BlockingQueue()</code></div>
<div class="line number10 index9 alt1"><code class="xhtml plain">{</code></div>
<div class="line number11 index10 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">this->capacity = 10;</code>
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<div class="line number12 index11 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue = new int;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">head = 0,tail = 0;</code>
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<div class="line number14 index13 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_init(&mutex,NULL);</code>
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<div class="line number15 index14 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_init(&notFull,NULL);</code>
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<div class="line number16 index15 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_init(&notEmpty,NULL);</code>
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<div class="line number17 index16 alt2"> </div>
<div class="line number18 index17 alt1"><code class="xhtml plain">}</code></div>
<div class="line number19 index18 alt2"> </div>
<div class="line number20 index19 alt1"><code class="xhtml plain">BlockingQueue::BlockingQueue(int capacity)</code></div>
<div class="line number21 index20 alt2"><code class="xhtml plain">{</code></div>
<div class="line number22 index21 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">this->capacity = capacity;</code>
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<div class="line number23 index22 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue = new int;</code>
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<div class="line number24 index23 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "capacity " << </code><code class="xhtml keyword">sizeof</code><code class="xhtml plain">(queue) << endl;</code>
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<code class="xhtml spaces"> </code><code class="xhtml color1">head</code> <code class="xhtml plain">= </code><code class="xhtml string">0</code><code class="xhtml plain">,</code><code class="xhtml color1">tail</code> <code class="xhtml plain">= </code><code class="xhtml string">0</code><code class="xhtml plain">;</code>
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<div class="line number26 index25 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_init(&mutex,NULL);</code>
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<div class="line number27 index26 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_init(&notFull,NULL);</code>
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<div class="line number28 index27 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_init(&notEmpty,NULL);</code>
</div>
<div class="line number29 index28 alt2"> </div>
<div class="line number30 index29 alt1"><code class="xhtml plain">}</code></div>
<div class="line number31 index30 alt2"> </div>
<div class="line number32 index31 alt1"><code class="xhtml plain">BlockingQueue::~BlockingQueue()</code></div>
<div class="line number33 index32 alt2"><code class="xhtml plain">{</code></div>
<div class="line number34 index33 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">this->capacity = 0;</code>
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<div class="line number35 index34 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">head = 0,tail = 0;</code>
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<div class="line number36 index35 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">delete queue;</code>
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<div class="line number37 index36 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_destroy(&mutex);</code>
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<div class="line number38 index37 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_destroy(&notFull);</code>
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<div class="line number39 index38 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_destroy(&notEmpty);</code>
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<div class="line number40 index39 alt1"><code class="xhtml plain">}</code></div>
<div class="line number41 index40 alt2"> </div>
<div class="line number42 index41 alt1"><code class="xhtml plain">bool BlockingQueue::push(int item)</code></div>
<div class="line number43 index42 alt2"><code class="xhtml plain">{</code></div>
<div class="line number44 index43 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_lock(&mutex);</code>
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<div class="line number45 index44 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "you want push " << item << endl;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">while((head + 1) % capacity == tail)//is full</code>
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<div class="line number47 index46 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">{</code>
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<div class="line number48 index47 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "is full,wait..." << endl;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">// push wait</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_wait(&notFull,&mutex);</code>
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<div class="line number51 index50 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "not full,unlock" << endl;</code>
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<div class="line number52 index51 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">}</code>
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<div class="line number53 index52 alt2"> </div>
<div class="line number54 index53 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">{</code>
</div>
<div class="line number55 index54 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue = item;</code>
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<div class="line number56 index55 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">head = (head + 1) % capacity;</code>
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<div class="line number57 index56 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "push " << item << endl;</code>
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<code class="xhtml spaces"> </code><code class="xhtml plain">//wake up poll thread</code>
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<div class="line number59 index58 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_signal(&notEmpty);</code>
</div>
<div class="line number60 index59 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_unlock(&mutex);</code>
</div>
<div class="line number61 index60 alt2"> </div>
<div class="line number62 index61 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">return true;</code>
</div>
<div class="line number63 index62 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">}</code>
</div>
<div class="line number64 index63 alt1"><code class="xhtml plain">}</code></div>
<div class="line number65 index64 alt2"> </div>
<div class="line number66 index65 alt1"><code class="xhtml plain">int BlockingQueue::poll()</code></div>
<div class="line number67 index66 alt2"><code class="xhtml plain">{</code></div>
<div class="line number68 index67 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_lock(&mutex);</code>
</div>
<div class="line number69 index68 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">int ret = 0;</code>
</div>
<div class="line number70 index69 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">while(head == tail) // is empty</code>
</div>
<div class="line number71 index70 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">{</code>
</div>
<div class="line number72 index71 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "is empty,wait..." << endl;</code>
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<div class="line number73 index72 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">//poll wait</code>
</div>
<div class="line number74 index73 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_wait(&notEmpty,&mutex);</code>
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<div class="line number75 index74 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "not empty,unlock..." << endl;</code>
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<div class="line number76 index75 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">}</code>
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<div class="line number77 index76 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">{</code>
</div>
<div class="line number78 index77 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">ret = queue;</code>
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<div class="line number79 index78 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">tail = (tail + 1) % capacity;</code>
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<div class="line number80 index79 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">cout << "take " << ret << endl;</code>
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<div class="line number81 index80 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">//wake up push thread</code>
</div>
<div class="line number82 index81 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_cond_signal(&notFull);</code>
</div>
<div class="line number83 index82 alt2"> </div>
<div class="line number84 index83 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_mutex_unlock(&mutex);</code>
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<div class="line number85 index84 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">return ret;</code>
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<div class="line number86 index85 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">}</code>
</div>
<div class="line number87 index86 alt2"><code class="xhtml plain">}</code></div>
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<code class="xhtml plain">#include <</code><code class="xhtml keyword">iostream</code><code class="xhtml plain">></code>
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<div class="line number2 index1 alt1"><code class="xhtml plain">#include "include/BlockingQueue.h"</code></div>
<div class="line number3 index2 alt2"><code class="xhtml plain">using namespace std;</code></div>
<div class="line number4 index3 alt1"><code class="xhtml plain">BlockingQueue queue(3);</code></div>
<div class="line number5 index4 alt2"> </div>
<div class="line number6 index5 alt1"><code class="xhtml plain">void* put(void *)</code></div>
<div class="line number7 index6 alt2"><code class="xhtml plain">{</code></div>
<div class="line number8 index7 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.push(1);</code>
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<div class="line number9 index8 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.push(2);</code>
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<div class="line number10 index9 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.push(3);</code>
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<div class="line number11 index10 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.push(4);</code>
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<div class="line number12 index11 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.push(5);</code>
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<div class="line number13 index12 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">return NULL;</code>
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<div class="line number14 index13 alt1"><code class="xhtml plain">}</code></div>
<div class="line number15 index14 alt2"> </div>
<div class="line number16 index15 alt1"><code class="xhtml plain">void* take(void *)</code></div>
<div class="line number17 index16 alt2"><code class="xhtml plain">{</code></div>
<div class="line number18 index17 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.poll();</code>
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<div class="line number19 index18 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.poll();</code>
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<div class="line number20 index19 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">queue.poll();</code>
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<div class="line number21 index20 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">return NULL;</code>
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<div class="line number22 index21 alt1"><code class="xhtml plain">}</code></div>
<div class="line number23 index22 alt2"> </div>
<div class="line number24 index23 alt1"> </div>
<div class="line number25 index24 alt2"><code class="xhtml plain">int main() {</code></div>
<div class="line number26 index25 alt1"> </div>
<div class="line number27 index26 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_t put1,take1;</code>
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<div class="line number28 index27 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_create(&put1,NULL,put,0);</code>
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<div class="line number29 index28 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_create(&take1,NULL,take,0);</code>
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<div class="line number30 index29 alt1"> </div>
<div class="line number31 index30 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">void * retval;</code>
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<div class="line number32 index31 alt1">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_join(put1,&retval);</code>
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<div class="line number33 index32 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">pthread_join(take1,&retval);</code>
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<div class="line number34 index33 alt1"> </div>
<div class="line number35 index34 alt2">
<code class="xhtml spaces"> </code><code class="xhtml plain">return 0;</code>
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<div class="line number36 index35 alt1"><code class="xhtml plain">}</code></div>
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<p>以上就是小编为大家带来的Linux C++ 使用condition实现阻塞队列的方法全部内容了，希望大家多多支持~</p>
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