root/opal/mca/event/libevent2022/libevent/sample/signal-test.c

DEFINITIONS

1. signal_cb
2. main

   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 <event.h>
  28 
  29 #ifdef _EVENT___func__
  30 #define __func__ _EVENT___func__
  31 #endif
  32 
  33 int called = 0;
  34 
  35 static void
  36 signal_cb(evutil_socket_t fd, short event, void *arg)
  37 {
  38         struct event *signal = arg;
  39 
  40         printf("%s: got signal %d\n", __func__, EVENT_SIGNAL(signal));
  41 
  42         if (called >= 2)
  43                 event_del(signal);
  44 
  45         called++;
  46 }
  47 
  48 int
  49 main(int argc, char **argv)
  50 {
  51         struct event signal_int;
  52         struct event_base* base;
  53 #ifdef WIN32
  54         WORD wVersionRequested;
  55         WSADATA wsaData;
  56 
  57         wVersionRequested = MAKEWORD(2, 2);
  58 
  59         (void) WSAStartup(wVersionRequested, &wsaData);
  60 #endif
  61 
  62         /* Initalize the event library */
  63         base = event_base_new();
  64 
  65         /* Initalize one event */
  66         event_assign(&signal_int, base, SIGINT, EV_SIGNAL|EV_PERSIST, signal_cb,
  67             &signal_int);
  68 
  69         event_add(&signal_int, NULL);
  70 
  71         event_base_dispatch(base);
  72         event_base_free(base);
  73 
  74         return (0);
  75 }
  76