CreateMutex利用互斥对象实现线程同步实例

CreateMutex利用互斥对象实现线程同步实例

 

#include  < windows.h >
#include  < iostream.h >

DWORD WINAPI Fun1Proc(LPVOID lpParameter);
DWORD WINAPI Fun2Proc(LPVOID lpParameter);

int  index = 0 ;
int  tickets = 100 ;
HANDLE hMutex;
void  main()
{
    HANDLE hThread1,hThread2;
    hThread1=CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
    hThread2=CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);
    CloseHandle(hThread1);
    CloseHandle(hThread2);
    
    hMutex=CreateMutex(NULL,FALSE,NULL);
    //TRUE代表主线程拥有互斥对象 但是主线程没有释放该对象  互斥对象谁拥有 谁释放
    //FLASE代表当前没有线程拥有这个互斥对象

    Sleep(4000);

}

DWORD WINAPI Fun1Proc(LPVOID lpParameter)
{
    while (true)
    {
        WaitForSingleObject(hMutex,INFINITE);
        if (tickets>0)
        {
            cout<<"t1: "<<tickets--<<endl;
        
        }
        else
        {
            break;
        }
        ReleaseMutex(hMutex);
    }

    return 0;
}

DWORD WINAPI Fun2Proc(LPVOID lpParameter)
{
    while (true)
    {
        WaitForSingleObject(hMutex,INFINITE);
        if (tickets>0)
        {
            cout<<"t2: "<<tickets--<<endl;
        }
        else
        {
            break;
        }
        ReleaseMutex(hMutex);
    }

    return 0;
}