使用windows 32 标准库写多核编程信号量
时间: 2024-03-26 08:41:28 浏览: 14
在Windows 32位标准库中,可以使用互斥量和条件变量来实现信号量的功能。下面是一个使用Windows 32位标准库实现生产者消费者模型的示例代码:
```cpp
#include <iostream>
#include <thread>
#include <mutex>
#include <condition_variable>
#include <queue>
#include <Windows.h>
using namespace std;
const int kBufferSize = 10;
queue<int> buffer;
CRITICAL_SECTION buffer_mutex;
CONDITION_VARIABLE buffer_full;
CONDITION_VARIABLE buffer_empty;
void producer() {
for (int i = 0; i < 20; ++i) {
EnterCriticalSection(&buffer_mutex);
while (buffer.size() == kBufferSize) {
SleepConditionVariableCS(&buffer_full, &buffer_mutex, INFINITE);
}
buffer.push(i);
cout << "Producer: produced " << i << endl;
LeaveCriticalSection(&buffer_mutex);
WakeConditionVariable(&buffer_empty);
}
}
void consumer() {
for (int i = 0; i < 20; ++i) {
EnterCriticalSection(&buffer_mutex);
while (buffer.empty()) {
SleepConditionVariableCS(&buffer_empty, &buffer_mutex, INFINITE);
}
int val = buffer.front();
buffer.pop();
cout << "Consumer: consumed " << val << endl;
LeaveCriticalSection(&buffer_mutex);
WakeConditionVariable(&buffer_full);
}
}
int main() {
InitializeCriticalSection(&buffer_mutex);
InitializeConditionVariable(&buffer_full);
InitializeConditionVariable(&buffer_empty);
thread producer_thread(producer);
thread consumer_thread(consumer);
producer_thread.join();
consumer_thread.join();
DeleteCriticalSection(&buffer_mutex);
return 0;
}
```
在这个示例中,我们使用了Windows 32位标准库提供的互斥量和条件变量来实现信号量的功能。其中,互斥量用于保护缓冲区的访问,条件变量用于同步生产者和消费者之间的操作。
当缓冲区已满时,生产者线程会等待消费者线程消费数据后再继续生产;当缓冲区为空时,消费者线程会等待生产者线程生产数据后再继续消费。通过使用条件变量,可以保证生产者和消费者之间的操作是同步的。