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thread_pool.c
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141 lines (123 loc) · 3.56 KB
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#include "thread_pool.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static thread_pool_t *pool = NULL;
// 工作线程，从任务队列中取任务并执行
static void *thread_worker(void *arg) {
work_queue_t *work = NULL;
while (1) {
pthread_mutex_lock(&pool->queue_lock);
while (!pool->queue_head && !pool->shutdown) {
//没有任务就阻塞再这个地方
pthread_cond_wait(&pool->queue_ready, &pool->queue_lock);
}
if (pool->shutdown) {
printf(" worker loseing\n");
pthread_mutex_unlock(&pool->queue_lock);
pthread_exit(NULL);
}
printf(" worker running\n");
work = pool->queue_head;
pool->queue_head = pool->queue_head->next;
pthread_mutex_unlock(&pool->queue_lock);
work->routine(work->arg); //执行任务
free(work);
}
return NULL;
}
// 创建线程池
int thread_pool_create(int max_thr_num) {
pool = calloc(1, sizeof(thread_pool_t));
if (!pool) {
printf("FUNC:%s erorr\n", __func__);
exit(1);
}
//初始化
pool->max_thr_num = max_thr_num;
pool->shutdown = 0;
pool->queue_head = NULL;
if (pthread_mutex_init(&pool->queue_lock, NULL) != 0) {
printf("FUNC:%s queue_lock failed,errno:%d,msg:%s\n", __func__, errno,
strerror(errno));
exit(1);
}
if (pthread_cond_init(&pool->queue_ready, NULL) != 0) {
printf("FUNC:%s queue_ready failed,errno:%d,msg:%s\n", __func__, errno,
strerror(errno));
exit(1);
}
// 创建工作线程
pool->thr_id = calloc(max_thr_num, sizeof(pthread_t));
if (!pool->thr_id) {
msg_output;
exit(1);
}
for (size_t i = 0; i < max_thr_num; i++) {
if (pthread_create(&pool->thr_id[i], NULL, thread_worker, NULL) != 0) {
msg_output;
exit(1);
}
}
printf("create success\n");
return 0;
}
// 销毁线程池
void thread_pool_destroy() {
if (pool->shutdown) {
return;
}
//通知所有正在等待的工作线程
pool->shutdown = 1;
pthread_mutex_lock(&pool->queue_lock);
pthread_cond_broadcast(&pool->queue_ready);
pthread_mutex_unlock(&pool->queue_lock);
// join工作线程
for (size_t i = 0; i < pool->max_thr_num; i++) {
pthread_join(pool->thr_id[i], NULL);
}
free(pool->thr_id);
// 释放任务队列
work_queue_t *member = NULL;
while (pool->queue_head) {
member = pool->queue_head;
pool->queue_head = pool->queue_head->next;
free(member);
member = NULL;
printf("free sucess\n");
}
pthread_mutex_destroy(&pool->queue_lock);
pthread_cond_destroy(&pool->queue_ready);
free(pool);
}
int thread_poll_add_work(ROUTINE routine, void *arg) {
if (!routine) {
msg_output;
return -1;
}
work_queue_t *work = calloc(1, sizeof(work_queue_t));
if (!work) {
msg_output;
return -1;
}
work->routine = routine;
work->arg = arg;
work->next = NULL;
pthread_mutex_lock(&pool->queue_lock);
work_queue_t *member = pool->queue_head;
if (!member) {
pool->queue_head = work;
} else {
while (member->next) {
member = member->next;
}
member->next = work; // ring
}
// 通知工作线程，有任务加入
pthread_cond_signal(&pool->queue_ready);
pthread_mutex_unlock(&pool->queue_lock);
printf("add sucess\n");
return 0;
}