26.event跨进程通信

• 以id创建事件

   char name[] = "myevent";
   HANDLE event = CreateEventA(NULL, FALSE, FALSE, name);

• 设置事件

   SetEvent(event);

• 关闭事件

   CloseHandle(event);

• 另一个进程打开事件

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

• 然后等待事件

   DWORD res = WaitForSingleObject(event, );

• 等待结果

   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;

完整代码:

event.c

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

 char name[] = "myevent";
 //mutex可以感知丢失，event无法感知
 void main()
 {
     HANDLE event = CreateEventA(NULL, FALSE, FALSE, name);
     printf("创建成功");
     char ch = getch();

     SetEvent(event);
     printf("触发event");
     CloseHandle(event);

     system("pause");
 }

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");
 }