Mutex互斥体 学习

创建互斥体

HANDLE WINAPI CreateMutex( _In_opt_ LPSECURITY_ATTRIBUTES lpMutexAttributes, //安全属性 _In_ BOOL bInitialOwner,//创建者是否拥有所有权 真为拥有 _In_opt_ LPCTSTR lpName//名称);

ReleaseMutex(hMutex); 释放互斥体所有权，设置没有任何线程拥有

WaitForSingleObject(hMutex,INFINITE);//等待释放Mutex;INFINITE无限等待，只有没有线程拥有HMutex才会返回

以下是c++ 代码演示

#include "stdafx.h"

#include <windows.h>

#include <iostream>

using namespace std;

HANDLE g_hMutex;

DWORD ticket = 100;

DWORD WINAPI Fun1(_In_ LPVOID lpParameter);

DWORD WINAPI Fun2(_In_ LPVOID lpParameter);

int main()

{

g_hMutex = CreateMutex(NULL, false, NULL);//创建互斥体

HANDLE hThread1 = CreateThread(NULL, 0, Fun1, 0, 0, 0);

HANDLE hThread2 = CreateThread(NULL, 0, Fun2, 0, 0, 0);

getchar();

CloseHandle(g_hMutex);

CloseHandle(hThread1);

CloseHandle(hThread2);

return 0;

}

DWORD WINAPI Fun1(_In_ LPVOID lpParameter)

{

while (true)

{

WaitForSingleObject(g_hMutex,INFINITE);

if (ticket > 0)

cout << "线程1 Ticket：" << ticket-- << endl;

else

break;

ReleaseMutex(g_hMutex);

}

return 0;

}

DWORD WINAPI Fun2(_In_ LPVOID lpParameter)

{

while (true)

{

WaitForSingleObject(g_hMutex, INFINITE);

if (ticket > 0)

cout << "线程2 Ticket：" << ticket-- << endl;

else

break;

ReleaseMutex(g_hMutex);

}

return 0;

}