contrib/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 #include <event2/event-config.h>
  10
  11 #include <sys/stat.h>
  12 #ifndef _WIN32
  13 #include <sys/queue.h>
  14 #include <unistd.h>
  15 #include <sys/time.h>
  16 #else
  17 #include <winsock2.h>
  18 #include <windows.h>
  19 #endif
  20 #include <signal.h>
  21 #include <fcntl.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include <event2/event.h>
  28
  29 int called = 0;
  30
  31 static void
  32 signal_cb(evutil_socket_t fd, short event, void *arg)
  33 {
  34         struct event *signal = arg;
  35
  36         printf("signal_cb: got signal %d\n", event_get_signal(signal));
  37
  38         if (called >= 2)
  39                 event_del(signal);
  40
  41         called++;
  42 }
  43
  44 int
  45 main(int argc, char **argv)
  46 {
  47         struct event *signal_int = NULL;
  48         struct event_base* base;
  49         int ret = 0;
  50 #ifdef _WIN32
  51         WORD wVersionRequested;
  52         WSADATA wsaData;
  53
  54         wVersionRequested = MAKEWORD(2, 2);
  55
  56         (void) WSAStartup(wVersionRequested, &wsaData);
  57 #endif
  58
  59         /* Initialize the event library */
  60         base = event_base_new();
  61         if (!base) {
  62                 ret = 1;
  63                 goto out;
  64         }
  65
  66         /* Initialize one event */
  67         signal_int = evsignal_new(base, SIGINT, signal_cb, event_self_cbarg());
  68         if (!signal_int) {
  69                 ret = 2;
  70                 goto out;
  71         }
  72         event_add(signal_int, NULL);
  73
  74         event_base_dispatch(base);
  75
  76 out:
  77         if (signal_int)
  78                 event_free(signal_int);
  79         if (base)
  80                 event_base_free(base);
  81         return ret;
  82 }
  83