external/bsd/libevent/dist/evsignal-internal.h

   1 /*      $NetBSD: evsignal-internal.h,v 1.1.1.1 2013/04/11 16:43:26 christos Exp $       */
   2 /*
   3  * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu>
   4  * Copyright 2007-2012 Niels Provos and Nick Mathewson
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 #ifndef _EVSIGNAL_H_
  29 #define _EVSIGNAL_H_
  30
  31 #ifndef evutil_socket_t
  32 #include "event2/util.h"
  33 #endif
  34 #include <signal.h>
  35
  36 typedef void (*ev_sighandler_t)(int);
  37
  38 /* Data structure for the default signal-handling implementation in signal.c
  39  */
  40 struct evsig_info {
  41         /* Event watching ev_signal_pair[1] */
  42         struct event ev_signal;
  43         /* Socketpair used to send notifications from the signal handler */
  44         evutil_socket_t ev_signal_pair[2];
  45         /* True iff we've added the ev_signal event yet. */
  46         int ev_signal_added;
  47         /* Count of the number of signals we're currently watching. */
  48         int ev_n_signals_added;
  49
  50         /* Array of previous signal handler objects before Libevent started
  51          * messing with them.  Used to restore old signal handlers. */
  52 #ifdef _EVENT_HAVE_SIGACTION
  53         struct sigaction **sh_old;
  54 #else
  55         ev_sighandler_t **sh_old;
  56 #endif
  57         /* Size of sh_old. */
  58         int sh_old_max;
  59 };
  60 int evsig_init(struct event_base *);
  61 void evsig_dealloc(struct event_base *);
  62
  63 void evsig_set_base(struct event_base *base);
  64
  65 #endif /* _EVSIGNAL_H_ */