用createthread实现c语言的线程池
时间: 2023-06-20 13:07:02 浏览: 191
一个c语言实现的线程池
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要使用 `CreateThread` 实现一个线程池,需要完成以下几个步骤:
1. 定义线程池结构体
```c
typedef struct {
int thread_count; // 线程数量
HANDLE *threads; // 线程句柄数组
HANDLE *queue; // 任务队列
CRITICAL_SECTION queue_lock; // 任务队列锁
HANDLE signal_event; // 信号事件
bool terminate; // 是否终止
} thread_pool_t;
```
2. 初始化线程池
```c
bool thread_pool_init(thread_pool_t *pool, int thread_count) {
pool->thread_count = thread_count;
pool->threads = (HANDLE*)malloc(thread_count * sizeof(HANDLE));
pool->queue = (HANDLE*)malloc(thread_count * sizeof(HANDLE));
InitializeCriticalSection(&pool->queue_lock);
pool->signal_event = CreateEvent(NULL, FALSE, FALSE, NULL);
pool->terminate = false;
for (int i = 0; i < thread_count; i++) {
pool->threads[i] = CreateThread(NULL, 0, thread_func, pool, 0, NULL);
if (!pool->threads[i]) {
return false;
}
}
return true;
}
```
3. 线程函数
```c
DWORD WINAPI thread_func(LPVOID param) {
thread_pool_t *pool = (thread_pool_t*)param;
HANDLE task;
while (true) {
WaitForSingleObject(pool->signal_event, INFINITE);
EnterCriticalSection(&pool->queue_lock);
if (pool->terminate) {
LeaveCriticalSection(&pool->queue_lock);
break;
}
task = NULL;
for (int i = 0; i < pool->thread_count; i++) {
if (pool->queue[i]) {
task = pool->queue[i];
pool->queue[i] = NULL;
break;
}
}
LeaveCriticalSection(&pool->queue_lock);
if (task) {
// 执行任务
}
}
return 0;
}
```
4. 添加任务
```c
bool thread_pool_add_task(thread_pool_t *pool, LPTHREAD_START_ROUTINE func, LPVOID arg) {
EnterCriticalSection(&pool->queue_lock);
for (int i = 0; i < pool->thread_count; i++) {
if (!pool->queue[i]) {
pool->queue[i] = CreateThread(NULL, 0, func, arg, 0, NULL);
SetEvent(pool->signal_event);
LeaveCriticalSection(&pool->queue_lock);
return true;
}
}
LeaveCriticalSection(&pool->queue_lock);
return false;
}
```
5. 销毁线程池
```c
void thread_pool_destroy(thread_pool_t *pool) {
pool->terminate = true;
SetEvent(pool->signal_event);
WaitForMultipleObjects(pool->thread_count, pool->threads, TRUE, INFINITE);
for (int i = 0; i < pool->thread_count; i++) {
CloseHandle(pool->threads[i]);
}
free(pool->threads);
free(pool->queue);
DeleteCriticalSection(&pool->queue_lock);
CloseHandle(pool->signal_event);
}
```
完整代码如下:
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