release/src/router/libevent/sample/signal-test.c

   1 /*
   2  * Compile with:
   3  * cc -I/usr/local/include -o signal-test \
   4  *   signal-test.c -L/usr/local/lib -levent
   5  */
   6
   7 #include <sys/types.h>
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include "config.h"
  11 #endif
  12
  13 #include <sys/stat.h>
  14 #ifndef WIN32
  15 #include <sys/queue.h>
  16 #include <unistd.h>
  17 #include <sys/time.h>
  18 #else
  19 #include <windows.h>
  20 #endif
  21 #include <signal.h>
  22 #include <fcntl.h>
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <errno.h>
  27
  28 #include <event.h>
  29
  30 int called = 0;
  31
  32 static void
  33 signal_cb(int fd, short event, void *arg)
  34 {
  35         struct event *signal = arg;
  36
  37         printf("%s: got signal %d\n", __func__, EVENT_SIGNAL(signal));
  38
  39         if (called >= 2)
  40                 event_del(signal);
  41
  42         called++;
  43 }
  44
  45 int
  46 main (int argc, char **argv)
  47 {
  48         struct event signal_int;
  49
  50         /* Initalize the event library */
  51         struct event_base* base = event_base_new();
  52
  53         /* Initalize one event */
  54         event_set(&signal_int, SIGINT, EV_SIGNAL|EV_PERSIST, signal_cb,
  55             &signal_int);
  56         event_base_set(base, &signal_int);
  57
  58         event_add(&signal_int, NULL);
  59
  60         event_base_dispatch(base);
  61         event_base_free(base);
  62
  63         return (0);
  64 }
  65