1 /* $NetBSD: evsignal-internal.h,v 1.1.1.2 2017/01/31 21:14:52 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_INTERNAL_H_INCLUDED_ 29 #define EVSIGNAL_INTERNAL_H_INCLUDED_ 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 void evsig_free_globals_(void); 65 66 #endif /* EVSIGNAL_INTERNAL_H_INCLUDED_ */ 67