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分类: LINUX

2015-07-01 20:30:24

#include &lt;unistd.h&gt;<br /> #include &lt;stdlib.h&gt;<br /> #include &lt;errno.h&gt;<br /> #include &lt;string.h&gt;<br /> #include &lt;stdio.h&gt;<br /> #include &lt;pthread.h&gt;<br /> <br /> #define POOL_THREAD_NUM &nbsp;10<br /> <br /> typedef struct tpool_work {<br /> &nbsp; void &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;*(*routine)(void*); &nbsp; <br /> &nbsp; void &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;*arg; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br /> &nbsp; struct tpool_work &nbsp; *next; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br /> }tpool_work_t;<br /> <br /> typedef struct tpool {<br /> &nbsp; int &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; shutdown; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br /> &nbsp; int &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; max_thr_num; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br /> &nbsp; pthread_t &nbsp; &nbsp; &nbsp; *thr_id; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br /> &nbsp; tpool_work_t &nbsp; &nbsp;*queue_head; &nbsp; &nbsp; <br /> &nbsp; pthread_mutex_t queue_lock; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br /> &nbsp; pthread_cond_t &nbsp;queue_ready; &nbsp; &nbsp;<br /> }tpool_t;<br /> <br /> void tpool_destroy();<br /> int tpool_create(int max_thr_num);<br /> int tpool_add_work(void*(*routine)(void*), void *arg);<br /> <br /> static tpool_t *tpool = NULL;<br /> <br /> /*<br /> * &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; main()<br /> */<br /> void *func(void *arg)<br /> {<br /> &nbsp; &nbsp;printf("thread %d\n", (int)arg);<br /> &nbsp; &nbsp;sleep(2);<br /> &nbsp; &nbsp;return NULL;<br /> }<br /> <br /> int main(int argc, char *argv[])<br /> {<br /> &nbsp; int i;<br /> <br /> &nbsp; if (tpool_create(POOL_THREAD_NUM) != 0) {<br /> &nbsp; &nbsp; &nbsp; printf("tpool_create failed\n");<br /> &nbsp; &nbsp; &nbsp; exit(1);<br /> &nbsp; }<br /> &nbsp; <br /> &nbsp; for (i = 0; i &lt; 20; ++i) {<br /> &nbsp; &nbsp; &nbsp; tpool_add_work(func, (void*)i);<br /> &nbsp; }<br /> <br /> &nbsp; sleep(5);<br /> &nbsp; tpool_destroy();<br /> &nbsp; return 0;<br /> }<br /> <br /> /*<br /> * &nbsp; &nbsp; &nbsp; &nbsp; functions()<br /> */<br /> static void *thread_routine(void *arg)<br /> {<br /> &nbsp; tpool_work_t *work;<br /> &nbsp; &nbsp;<br /> &nbsp; while(1) {<br /> &nbsp; &nbsp; &nbsp; pthread_mutex_lock(&amp;tpool-&gt;queue_lock);<br /> &nbsp; &nbsp; &nbsp; while(!tpool-&gt;queue_head &amp;&amp; !tpool-&gt;shutdown) {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pthread_cond_wait(&amp;tpool-&gt;queue_ready, &amp;tpool-&gt;queue_lock); &nbsp; &nbsp;//释放锁,所有新建的线程阻塞<br /> &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; if (tpool-&gt;shutdown) {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pthread_mutex_unlock(&amp;tpool-&gt;queue_lock);<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pthread_exit(NULL);<br /> &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; work = tpool-&gt;queue_head;<br /> &nbsp; &nbsp; &nbsp; tpool-&gt;queue_head = tpool-&gt;queue_head-&gt;next;<br /> &nbsp; &nbsp; &nbsp; pthread_mutex_unlock(&amp;tpool-&gt;queue_lock);<br /> <br /> &nbsp; &nbsp; &nbsp; work-&gt;routine(work-&gt;arg);<br /> &nbsp; &nbsp; &nbsp; free(work);<br /> &nbsp; }<br /> &nbsp; return NULL; &nbsp; <br /> }<br /> <br /> int tpool_create(int max_thr_num)<br /> {<br /> &nbsp; int i;<br /> <br /> &nbsp; tpool = calloc(1, sizeof(tpool_t));<br /> &nbsp; if (!tpool) {<br /> &nbsp; &nbsp; &nbsp; printf("%s: calloc failed\n", __FUNCTION__);<br /> &nbsp; &nbsp; &nbsp; exit(1);<br /> &nbsp; }<br /> &nbsp; <br /> &nbsp; tpool-&gt;max_thr_num = max_thr_num; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //最大线程数<br /> &nbsp; tpool-&gt;shutdown = 0; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//线程池enable<br /> &nbsp; tpool-&gt;queue_head = NULL; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //线程链表 <br /> &nbsp; if (pthread_mutex_init(&amp;tpool-&gt;queue_lock, NULL) !=0) { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //创建锁<br /> &nbsp; &nbsp; &nbsp; printf("%s: pthread_mutex_init failed, errno:%d, error:%s\n",<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; __FUNCTION__, errno, strerror(errno));<br /> &nbsp; &nbsp; &nbsp; exit(1);<br /> &nbsp; }<br /> &nbsp; if (pthread_cond_init(&amp;tpool-&gt;queue_ready, NULL) !=0 ) { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//创建条件变量<br /> &nbsp; &nbsp; &nbsp; printf("%s: pthread_cond_init failed, errno:%d, error:%s\n", <br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; __FUNCTION__, errno, strerror(errno));<br /> &nbsp; &nbsp; &nbsp; exit(1);<br /> &nbsp; }<br /> &nbsp; <br /> &nbsp; tpool-&gt;thr_id = calloc(max_thr_num, sizeof(pthread_t)); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//线程id<br /> &nbsp; if (!tpool-&gt;thr_id) {<br /> &nbsp; &nbsp; &nbsp; printf("%s: calloc failed\n", __FUNCTION__);<br /> &nbsp; &nbsp; &nbsp; exit(1);<br /> &nbsp; }<br /> &nbsp; for (i = 0; i &lt; max_thr_num; ++i) { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//创建线程<br /> &nbsp; &nbsp; &nbsp; if (pthread_create(&amp;tpool-&gt;thr_id[i], NULL, thread_routine, NULL) != 0){<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; printf("%s:pthread_create failed, errno:%d, error:%s\n", __FUNCTION__, <br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; errno, strerror(errno));<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; exit(1);<br /> &nbsp; &nbsp; &nbsp; }<br /> &nbsp; } &nbsp; &nbsp;<br /> &nbsp; return 0;<br /> }<br /> <br /> void tpool_destroy()<br /> {<br /> &nbsp; int i;<br /> &nbsp; tpool_work_t *member;<br /> <br /> &nbsp; if (tpool-&gt;shutdown) {<br /> &nbsp; &nbsp; &nbsp; return;<br /> &nbsp; }<br /> &nbsp; tpool-&gt;shutdown = 1; <br /> <br /> &nbsp; pthread_mutex_lock(&amp;tpool-&gt;queue_lock);<br /> &nbsp; pthread_cond_broadcast(&amp;tpool-&gt;queue_ready); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //唤醒所有线程<br /> &nbsp; pthread_mutex_unlock(&amp;tpool-&gt;queue_lock);<br /> &nbsp; for (i = 0; i &lt; tpool-&gt;max_thr_num; ++i) {<br /> &nbsp; &nbsp; &nbsp; pthread_join(tpool-&gt;thr_id[i], NULL); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//等待线程结束<br /> &nbsp; }<br /> &nbsp; free(tpool-&gt;thr_id); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br /> <br /> &nbsp; while(tpool-&gt;queue_head) {<br /> &nbsp; &nbsp; &nbsp; member = tpool-&gt;queue_head;<br /> &nbsp; &nbsp; &nbsp; tpool-&gt;queue_head = tpool-&gt;queue_head-&gt;next;<br /> &nbsp; &nbsp; &nbsp; free(member);<br /> &nbsp; }<br /> <br /> &nbsp; pthread_mutex_destroy(&amp;tpool-&gt;queue_lock); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//销毁锁<br /> &nbsp; pthread_cond_destroy(&amp;tpool-&gt;queue_ready); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//销毁条件变量<br /> <br /> &nbsp; free(tpool); &nbsp; &nbsp;<br /> }<br /> <br /> int tpool_add_work(void *(*routine)(void*), void *arg)<br /> {<br /> &nbsp; tpool_work_t *work, *member;<br /> &nbsp; <br /> &nbsp; if (!routine){<br /> &nbsp; &nbsp; &nbsp; printf("%s:Invalid argument\n", __FUNCTION__);<br /> &nbsp; &nbsp; &nbsp; return -1;<br /> &nbsp; }<br /> &nbsp; <br /> &nbsp; work = malloc(sizeof(tpool_work_t));<br /> &nbsp; if (!work) {<br /> &nbsp; &nbsp; &nbsp; printf("%s:malloc failed\n", __FUNCTION__);<br /> &nbsp; &nbsp; &nbsp; return -1;<br /> &nbsp; }<br /> &nbsp; work-&gt;routine = routine;<br /> &nbsp; work-&gt;arg = arg;<br /> &nbsp; work-&gt;next = NULL;<br /> <br /> &nbsp; pthread_mutex_lock(&amp;tpool-&gt;queue_lock); &nbsp; &nbsp;<br /> &nbsp; member = tpool-&gt;queue_head;<br /> &nbsp; if (!member) {<br /> &nbsp; &nbsp; &nbsp; tpool-&gt;queue_head = work;<br /> &nbsp; } else {<br /> &nbsp; &nbsp; &nbsp; while(member-&gt;next) {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; member = member-&gt;next;<br /> &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; member-&gt;next = work;<br /> &nbsp; }<br /> &nbsp; pthread_cond_signal(&amp;tpool-&gt;queue_ready);<br /> &nbsp; pthread_mutex_unlock(&amp;tpool-&gt;queue_lock);<br /> <br /> &nbsp; return 0; &nbsp; &nbsp;<br /> }<br />
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