linux 实时信号

等待信号端

 1 #include <signal.h>
 2 #include <stdio.h>
 3 
 4 void handle(int sig,siginfo_t* value,void*useless)
 5 {
 6     printf("%d\n",value->si_value.sival_int);
 7 }
 8 
 9 
10 int main(int argc, const char *argv[])
11 {
12     struct sigaction act;
13     sigemptyset(&act.sa_mask);
14     act.sa_sigaction=handle;
15     act.sa_flags=SA_SIGINFO;
16     sigaction(SIGRTMIN,&act,NULL);
17     while(1)
18     {
19         sleep(1);
20     }
21     return 0;
22 }

发送信号端

 1 #include <stdio.h>
 2 #include <signal.h>
 3 int main(int argc, const char *argv[])
 4 {
 5     int pid;
 6     int i;
 7     sigval_t useless_v;
 8     scanf("%d",&pid);
 9     for (i = 0; i < 20; i++) {
10         useless_v.sival_int=i;
11         if (sigqueue(pid,SIGRTMIN,useless_v)<0)
12         {
13             perror("signale cend failed ");
14             printf("send signal failed \n");
15             printf(__FILE__);
16             printf("%d\n",__LINE__);
17         }
18     }
19 
20     return 0;
21 }