test/debug/evfilt_user.c

   1 /*
   2  * cc evfilt_user.c -pthread -I/usr/src/sys/ -o /tmp/evfilt_user
   3  */
   4
   5 #include <sys/types.h>
   6 #include <sys/event.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <pthread.h>
  11
  12 static void *domaster(void *arg);
  13 static void *doslave(void *arg);
  14
  15 int
  16 main(int ac, char **avj)
  17 {
  18     int fd;
  19     int r;
  20     struct kevent kev;
  21     pthread_t td1;
  22     pthread_t td2;
  23
  24     fd = kqueue();
  25     EV_SET(&kev, 1, EVFILT_USER, EV_ADD|EV_CLEAR, 0, 0, 0);
  26     r = kevent(fd, &kev, 1, NULL, 0, NULL);
  27     printf("r = %d\n", r);
  28     pthread_create(&td1, NULL, domaster, (void *)(intptr_t)fd);
  29     sleep(1);
  30     pthread_create(&td2, NULL, doslave, (void *)(intptr_t)fd);
  31     pthread_join(td1, NULL);
  32     pthread_join(td2, NULL);
  33 }
  34
  35 static void *
  36 domaster(void *arg)
  37 {
  38         struct kevent kev;
  39         int fd = (int)(intptr_t)arg;
  40         int r;
  41
  42         printf("master running\n");
  43         for (;;) {
  44                 EV_SET(&kev, 1, EVFILT_USER, 0, NOTE_TRIGGER, 0, 0);
  45                 r = kevent(fd, &kev, 1, NULL, 0, NULL);
  46                 printf("issued trigger %d\n", r);
  47                 sleep(1);
  48         }
  49
  50         return NULL;
  51 }
  52
  53 static void *
  54 doslave(void *arg)
  55 {
  56         struct kevent kev;
  57         int fd = (int)(intptr_t)arg;
  58         int r;
  59
  60         printf("slave running\n");
  61         for (;;) {
  62                 r = kevent(fd, NULL, 0, &kev, 1, NULL);
  63                 printf("received %d\n", r);
  64                 /*
  65                 EV_SET(&kev, 1, EVFILT_USER, EV_CLEAR, 0, 0, 0);
  66                 r = kevent(fd, &kev, 1, NULL, 0, NULL);
  67                 */
  68         }
  69         return NULL;
  70 }