Linux-IO多路复用select函数实践 

 1 #include <stdio.h>
 2 #include <unistd.h>
 3 #include <string.h>
 4 #include <sys/time.h>
 5 #include <sys/types.h>
 6 #include <sys/stat.h>
 7 #include <fcntl.h>
 8 #include <sys/select.h>
 9 
10 int main(void)
11 {
12     int ret = -1;
13     int fd = -1;
14     char buf[100];
15     fd_set myset;
16     struct timeval tm;
17     fd = open("/dev/input/mouse0",O_RDONLY);
18     if(fd < 0)
19     {
20         perror("open:");
21         return -1;
22     }
23     FD_ZERO(&myset);
24     FD_SET(fd, &myset);
25     FD_SET(0, &myset);
26     tm.tv_sec = 10;
27     tm.tv_usec = 0;
28     ret = select(fd + 1, &myset, NULL, NULL, &tm);
29     if(ret < 0)
30     {
31         perror("select:");
32         return -1;
33     }
34     else if(ret == 0)
35     {
36         printf("超时了\n");
37     }
38     else
39     {
40         if(FD_ISSET(fd, &myset))
41         {
42             //处理鼠标
43             memset(buf, 0, sizeof(buf));
44             read(fd, buf, 2);
45             printf("读出的鼠标:[%s]\n",buf);
46         }
47         if(FD_ISSET(0, &myset))
48         {
49             //处理键盘
50             memset(buf, 0, sizeof(buf));
51             read(0, buf, 2);
52             printf("读出的键盘:[%s]\n",buf);
53         }
54     }
55     return 0;
56 }

 

posted @ 2019-08-02 10:40  志瞳道合  阅读(252)  评论(0)    收藏  举报