third_party/libevent/evsignal.h

   1 /*
   2  * Copyright 2000-2002 Niels Provos <provos@citi.umich.edu>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27 #ifndef _EVSIGNAL_H_
  28 #define _EVSIGNAL_H_
  29
  30 typedef void (*ev_sighandler_t)(int);
  31
  32 struct evsignal_info {
  33         struct event ev_signal;
  34         int ev_signal_pair[2];
  35         int ev_signal_added;
  36         volatile sig_atomic_t evsignal_caught;
  37         struct event_list evsigevents[NSIG];
  38         sig_atomic_t evsigcaught[NSIG];
  39 #ifdef HAVE_SIGACTION
  40         struct sigaction **sh_old;
  41 #else
  42         ev_sighandler_t **sh_old;
  43 #endif
  44         int sh_old_max;
  45 };
  46 int evsignal_init(struct event_base *);
  47 void evsignal_process(struct event_base *);
  48 int evsignal_add(struct event *);
  49 int evsignal_del(struct event *);
  50 void evsignal_dealloc(struct event_base *);
  51
  52 #endif /* _EVSIGNAL_H_ */