27.mutex跨进程通信

• 创建互斥量mutex

   HANDLE mutex = CreateMutexA(NULL, TRUE, name);

• 根据id打开mutex

   HANDLE mutex = OpenMutexA(MUTEX_ALL_ACCESS,TRUE,name);

• 监听

   DWORD res = WaitForSingleObject(mutex, );

• 判断事件

   switch (res)
       {
       case WAIT_OBJECT_0:
           printf("收到信号-------");
           break;
       case WAIT_TIMEOUT:
           printf("超时没有收到-------");
           break;
       case WAIT_ABANDONED:
           printf("另外一个进程意外终止-------");
           break;
       default:
           break;
  
       }

mutex.c

 #include <stdio.h>
 #include <stdlib.h>
 #include <Windows.h>

 char name[] = "haihualovefang";

 void main()
 {
     HANDLE mutex = CreateMutexA(NULL, TRUE, name);
     printf("创建成功");
     char ch = getch();

     ReleaseMutex(mutex);
     printf("触发互斥量");
     CloseHandle(mutex);

 }

wait.c

 #include <stdio.h>
 #include <stdlib.h>
 #include <Windows.h>

 char name[] = "myevent";

 void main()
 {
     HANDLE event = OpenEventA(EVENT_ALL_ACCESS, TRUE, name);//打开事件

     if (event == NULL)
     {
         printf("打开失败");
         system("pause");
         return;
     }
     printf("等待-------");
     DWORD res = WaitForSingleObject(event, );
     switch (res)
     {
     case WAIT_OBJECT_0:
         printf("收到信号-------");
         break;
     case WAIT_TIMEOUT:
         printf("超时没有收到-------");
         break;
     case WAIT_ABANDONED:
         printf("另外一个进程意外终止-------");
         break;
     default:
         break;

     }
     CloseHandle(event);

     system("pause");
 }