michael@0: /*
michael@0:  * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu>
michael@0:  * Copyright 2007-2012 Niels Provos and Nick Mathewson
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  * 3. The name of the author may not be used to endorse or promote products
michael@0:  *    derived from this software without specific prior written permission.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
michael@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
michael@0:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
michael@0:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
michael@0:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
michael@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
michael@0:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
michael@0:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
michael@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
michael@0:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  */
michael@0: #ifndef _EVSIGNAL_H_
michael@0: #define _EVSIGNAL_H_
michael@0: 
michael@0: #ifndef evutil_socket_t
michael@0: #include "event2/util.h"
michael@0: #endif
michael@0: #include <signal.h>
michael@0: 
michael@0: typedef void (*ev_sighandler_t)(int);
michael@0: 
michael@0: /* Data structure for the default signal-handling implementation in signal.c
michael@0:  */
michael@0: struct evsig_info {
michael@0: 	/* Event watching ev_signal_pair[1] */
michael@0: 	struct event ev_signal;
michael@0: 	/* Socketpair used to send notifications from the signal handler */
michael@0: 	evutil_socket_t ev_signal_pair[2];
michael@0: 	/* True iff we've added the ev_signal event yet. */
michael@0: 	int ev_signal_added;
michael@0: 	/* Count of the number of signals we're currently watching. */
michael@0: 	int ev_n_signals_added;
michael@0: 
michael@0: 	/* Array of previous signal handler objects before Libevent started
michael@0: 	 * messing with them.  Used to restore old signal handlers. */
michael@0: #ifdef _EVENT_HAVE_SIGACTION
michael@0: 	struct sigaction **sh_old;
michael@0: #else
michael@0: 	ev_sighandler_t **sh_old;
michael@0: #endif
michael@0: 	/* Size of sh_old. */
michael@0: 	int sh_old_max;
michael@0: };
michael@0: int evsig_init(struct event_base *);
michael@0: void evsig_dealloc(struct event_base *);
michael@0: 
michael@0: void evsig_set_base(struct event_base *base);
michael@0: 
michael@0: #endif /* _EVSIGNAL_H_ */