nginx线程池源码是什么

typedef void (*cb_fun)(void *); //任务结构体 typedef struct task { void *argv; //任务函数的参数（任务执行结束前，要保证参数地址有效） cb_fun handler; //任务函数（返回值必须为0 非0值用作增加线程，和销毁线程池） struct task *next; //任务链指针 }zoey_task_t;

typedef struct task_queue { zoey_task_t *head; //队列头 zoey_task_t **tail; //队列尾 unsigned int maxtasknum; //最大任务限制 unsigned int curtasknum; //当前任务数 }zoey_task_queue_t;

typedef struct threadpool { pthread_mutex_t mutex; //互斥锁 pthread_cond_t cond; //条件锁 zoey_task_queue_t tasks;//任务队列 unsigned int threadnum; //线程数 unsigned int thread_stack_size; //线程堆栈大小 }zoey_threadpool_t;

//配置参数 typedef struct threadpool_conf { unsigned int threadnum; //线程数 unsigned int thread_stack_size;//线程堆栈大小 unsigned int maxtasknum;//最大任务限制 }zoey_threadpool_conf_t;

zoey_threadpool_t* zoey_threadpool_init(zoey_threadpool_conf_t *conf) { zoey_threadpool_t *pool = null; int error_flag_mutex = 0; int error_flag_cond = 0; pthread_attr_t attr; do{ if (z_conf_check(conf) == -1){ //检查参数是否合法 break; } pool = (zoey_threadpool_t *)malloc(sizeof(zoey_threadpool_t));//申请线程池句柄 if (pool == null){ break; } //初始化线程池基本参数 pool->threadnum = conf->threadnum; pool->thread_stack_size = conf->thread_stack_size; pool->tasks.maxtasknum = conf->maxtasknum; pool->tasks.curtasknum = 0; z_task_queue_init(&pool->tasks); if (z_thread_key_create() != 0){//创建一个pthread_key_t，用以访问线程全局变量。 free(pool); break; } if (z_thread_mutex_create(&pool->mutex) != 0){ //初始化互斥锁 z_thread_key_destroy(); free(pool); break; } if (z_thread_cond_create(&pool->cond) != 0){ //初始化条件锁 z_thread_key_destroy(); z_thread_mutex_destroy(&pool->mutex); free(pool); break; } if (z_threadpool_create(pool) != 0){ //创建线程池 z_thread_key_destroy(); z_thread_mutex_destroy(&pool->mutex); z_thread_cond_destroy(&pool->cond); free(pool); break; } return pool; }while(0); return null; }

int zoey_threadpool_add_task(zoey_threadpool_t *pool, cb_fun handler, void* argv) { zoey_task_t *task = null; //申请一个任务节点并赋值 task = (zoey_task_t *)malloc(sizeof(zoey_task_t)); if (task == null){ return -1; } task->handler = handler; task->argv = argv; task->next = null; if (pthread_mutex_lock(&pool->mutex) != 0){ //加锁 free(task); return -1; } do{ if (pool->tasks.curtasknum >= pool->tasks.maxtasknum){//判断工作队列中的任务数是否达到限制 break; } //将任务节点尾插到任务队列 *(pool->tasks.tail) = task; pool->tasks.tail = &task->next; pool->tasks.curtasknum++; //通知阻塞的线程 if (pthread_cond_signal(&pool->cond) != 0){ break; } //解锁 pthread_mutex_unlock(&pool->mutex); return 0; }while(0); pthread_mutex_unlock(&pool->mutex); free(task); return -1; }

void zoey_threadpool_destroy(zoey_threadpool_t *pool) { unsigned int n = 0; volatile unsigned int lock; //z_threadpool_exit_cb函数会使对应线程退出 for (; n < pool->threadnum; n++){ lock = 1; if (zoey_threadpool_add_task(pool, z_threadpool_exit_cb, &lock) != 0){ return; } while (lock){ usleep(1); } } z_thread_mutex_destroy(&pool->mutex); z_thread_cond_destroy(&pool->cond); z_thread_key_destroy(); free(pool); }

int zoey_thread_add(zoey_threadpool_t *pool) { int ret = 0; if (pthread_mutex_lock(&pool->mutex) != 0){ return -1; } ret = z_thread_add(pool); pthread_mutex_unlock(&pool->mutex); return ret; }

void zoey_set_max_tasknum(zoey_threadpool_t *pool,unsigned int num) { if (pthread_mutex_lock(&pool->mutex) != 0){ return -1; } z_change_maxtask_num(pool, num); //改变最大任务限制 pthread_mutex_unlock(&pool->mutex); }

int main() { int array[10000] = {0}; int i = 0; zoey_threadpool_conf_t conf = {5,0,5}; //实例化启动参数 zoey_threadpool_t *pool = zoey_threadpool_init(&conf);//初始化线程池 if (pool == null){ return 0; } for (; i < 10000; i++){ array[i] = i; if (i == 80){ zoey_thread_add(pool); //增加线程 zoey_thread_add(pool); } if (i == 100){ zoey_set_max_tasknum(pool, 0); //改变最大任务数 0为不做上限 } while(1){ if (zoey_threadpool_add_task(pool, testfun, &array[i]) == 0){ break; } printf("error in i = %d\n",i); } } zoey_threadpool_destroy(pool); while(1){ sleep(5); } return 0; }