external/bsd/libevent/dist/evsignal.h

   1 /*      $NetBSD$        */
   2 /*
   3  * Copyright 2000-2002 Niels Provos <provos@citi.umich.edu>
   4  * All rights reserved.
   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 typedef void (*ev_sighandler_t)(int);
  32
  33 struct evsignal_info {
  34         struct event ev_signal;
  35         int ev_signal_pair[2];
  36         int ev_signal_added;
  37         volatile sig_atomic_t evsignal_caught;
  38         struct event_list evsigevents[NSIG];
  39         sig_atomic_t evsigcaught[NSIG];
  40 #ifdef HAVE_SIGACTION
  41         struct sigaction **sh_old;
  42 #else
  43         ev_sighandler_t **sh_old;
  44 #endif
  45         int sh_old_max;
  46 };
  47 int evsignal_init(struct event_base *);
  48 void evsignal_process(struct event_base *);
  49 int evsignal_add(struct event *);
  50 int evsignal_del(struct event *);
  51 void evsignal_dealloc(struct event_base *);
  52
  53 #endif /* _EVSIGNAL_H_ */