/*

 * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu>

 * Copyright 2007-2012 Niels Provos and Nick Mathewson

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef _EVSIGNAL_H_

#define _EVSIGNAL_H_

#ifndef evutil_socket_t

#include "event2/util.h"

#endif

#include <signal.h>

typedef void (*ev_sighandler_t)(int);

/* Data structure for the default signal-handling implementation in signal.c

 */

struct evsig_info {

	/* Event watching ev_signal_pair[1] */

	struct event ev_signal;

	/* Socketpair used to send notifications from the signal handler */

	evutil_socket_t ev_signal_pair[2];

	/* True iff we've added the ev_signal event yet. */

	int ev_signal_added;

	/* Count of the number of signals we're currently watching. */

	int ev_n_signals_added;

	/* Array of previous signal handler objects before Libevent started

	 * messing with them.  Used to restore old signal handlers. */

#ifdef _EVENT_HAVE_SIGACTION

	struct sigaction **sh_old;

#else

	ev_sighandler_t **sh_old;

#endif

	/* Size of sh_old. */

	int sh_old_max;

};

int evsig_init(struct event_base *);

void evsig_dealloc(struct event_base *);

void evsig_set_base(struct event_base *base);

#endif /* _EVSIGNAL_H_ */