1 /* 2 * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu> 3 * Copyright 2007-2012 Niels Provos and Nick Mathewson 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_INTERNAL_H_INCLUDED_ 28 #define EVSIGNAL_INTERNAL_H_INCLUDED_ 29 30 #ifndef evutil_socket_t 31 #include "event2/util.h" 32 #endif 33 #include <signal.h> 34 35 typedef void (*ev_sighandler_t)(int); 36 37 /* Data structure for the default signal-handling implementation in signal.c 38 */ 39 struct evsig_info { 40 /* Event watching ev_signal_pair[1] */ 41 struct event ev_signal; 42 /* Socketpair used to send notifications from the signal handler */ 43 evutil_socket_t ev_signal_pair[2]; 44 /* True iff we've added the ev_signal event yet. */ 45 int ev_signal_added; 46 /* Count of the number of signals we're currently watching. */ 47 int ev_n_signals_added; 48 49 /* Array of previous signal handler objects before Libevent started 50 * messing with them. Used to restore old signal handlers. */ 51 #ifdef EVENT__HAVE_SIGACTION 52 struct sigaction **sh_old; 53 #else 54 ev_sighandler_t **sh_old; 55 #endif 56 /* Size of sh_old. */ 57 int sh_old_max; 58 }; 59 int evsig_init_(struct event_base *); 60 void evsig_dealloc_(struct event_base *); 61 62 void evsig_set_base_(struct event_base *base); 63 void evsig_free_globals_(void); 64 65 #endif /* EVSIGNAL_INTERNAL_H_INCLUDED_ */ 66