vc进程间互斥Mutex

参考MSDN例子

First Process

#include <windows.h>
#include <stdio.h>
#include <conio.h>

// This process creates the mutex object.

int main(void)
{
    HANDLE hMutex; 

    hMutex = CreateMutex( 
        NULL,                        // default security descriptor
        FALSE,                       // mutex not owned
        TEXT("NameOfMutexObject"));  // object name

    if (hMutex == NULL) 
        printf("CreateMutex error: %dn", GetLastError() ); 
    else 
        if ( GetLastError() == ERROR_ALREADY_EXISTS ) 
            printf("CreateMutex opened an existing mutexn"); 
        else{
            while (1)
            {
                WaitForSingleObject(hMutex, INFINITE);
                printf("CreateMutex created a new mutex.n");
                ReleaseMutex(hMutex);
                Sleep(1000);
            }
        }

    // Keep this process around until the second process is run
    _getch();

    CloseHandle(hMutex);

    return 0;
}

Second Process

#include <windows.h>
#include <stdio.h>

// This process opens a handle to a mutex created by another process.

int main(void)
{
    HANDLE hMutex; 

    hMutex = OpenMutex( 
        MUTEX_ALL_ACCESS,            // request full access
        FALSE,                       // handle not inheritable
        TEXT("NameOfMutexObject"));  // object name

    if (hMutex == NULL) 
        printf("OpenMutex error: %dn", GetLastError() );
    else{

       while (1)
        {
            printf("wait for single objectn");
            WaitForSingleObject(hMutex, INFINITE);
            printf("OpenMutex successfully opened the mutex.n");
            ReleaseMutex(hMutex);
            Sleep(1000);
        }

       }

    CloseHandle(hMutex);

    return 0;
}

断点停在任何一个程序WaitForSingleObject和ReleaseMutex程序中间，另外一个程序将等待

最后

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