26.event跨进程通信

  • 以id创建事件 
    1 char name[100] = "myevent";
2 HANDLE event = CreateEventA(NULL, FALSE, FALSE, name);

     

  • 设置事件 
    1 SetEvent(event);

     

  • 关闭事件 
    1 CloseHandle(event);

     

  • 另一个进程打开事件 
    1 HANDLE event = OpenEventA(EVENT_ALL_ACCESS, TRUE, name);//打开事件

     

  • 然后等待事件 
    1 DWORD res = WaitForSingleObject(event, 20000);

     

  • 等待结果 
    1 case WAIT_OBJECT_0:
2     printf("收到信号-------");
3     break;
4 case WAIT_TIMEOUT:
5     printf("超时没有收到-------");
6     break;
7 case WAIT_ABANDONED:
8     printf("另外一个进程意外终止-------");
9     break;

     

完整代码:

event.c

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <Windows.h>
 4 
 5 char name[100] = "myevent";
 6 //mutex可以感知丢失，event无法感知
 7 void main()
 8 {
 9     HANDLE event = CreateEventA(NULL, FALSE, FALSE, name);
10     printf("创建成功");
11     char ch = getch();
12 
13     SetEvent(event);
14     printf("触发event");
15     CloseHandle(event);
16 
17     system("pause");
18 }

wait.c

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <Windows.h>
 4 
 5 char name[100] = "myevent";
 6 
 7 void main()
 8 {
 9     HANDLE event = OpenEventA(EVENT_ALL_ACCESS, TRUE, name);//打开事件
10 
11     if (event == NULL)
12     {
13         printf("打开失败");
14         system("pause");
15         return;
16     }
17     printf("等待-------");
18     DWORD res = WaitForSingleObject(event, 20000);
19     switch (res)
20     {
21     case WAIT_OBJECT_0:
22         printf("收到信号-------");
23         break;
24     case WAIT_TIMEOUT:
25         printf("超时没有收到-------");
26         break;
27     case WAIT_ABANDONED:
28         printf("另外一个进程意外终止-------");
29         break;
30     default:
31         break;
32 
33     }
34     CloseHandle(event);
35 
36 
37 
38 
39     system("pause");
40 }

 

posted @ 2018-02-03 13:17  喵小喵~  阅读(844)  评论(0)  编辑  收藏  举报