信号量多线程同步

#include <iostream>
#include <Windows.h>
using namespace std;
HANDLE hSemaphnore1;
HANDLE hSemaphnore2;
int global_variable =0;
void Threadfun1(LPVOID pParam)
{
    WaitForSingleObject(hSemaphnore1,INFINITE);
    while(1)
    {
        global_variable++;
        printf("%d\n",global_variable);
        Sleep(100);  //睡眠下，让其他线程有机会抢占
        if(global_variable ==10)
        {
            ReleaseSemaphore(hSemaphnore2, 1, NULL);  //通知线程2
            WaitForSingleObject(hSemaphnore1,INFINITE); //让线程1等待
        }
    }
}
void Threadfun2(LPVOID nParam)
{
    WaitForSingleObject(hSemaphnore2,INFINITE);
    while(1)
    {
        global_variable--;
        printf("%d\n",global_variable);
        Sleep(100);
        if(global_variable ==0)
        {
            ReleaseSemaphore(hSemaphnore1, 1, NULL); //通知线程1
            WaitForSingleObject(hSemaphnore2,INFINITE);
        }
    }
}
int main()
{
    DWORD threadLidar_receive,threadlidar_process;
    hSemaphnore1 = CreateSemaphore(NULL,1,1,NULL);
    hSemaphnore2 = CreateSemaphore(NULL,0,1,NULL);
    CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Threadfun1, NULL, 0, &threadLidar_receive);
    CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Threadfun2,NULL, 0, &threadlidar_process);
    Sleep(100);
    system("pause");
    return 0;
}

转载于:https://www.cnblogs.com/cheng07045406/p/3253515.html