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/******************************************************************************
*                            recordMyDesktop                                  *
*******************************************************************************
*                                                                             *
*            Copyright (C) 2006,2007,2008 John Varouhakis                     *
*                                                                             *
*                                                                             *
*   This program is free software; you can redistribute it and/or modify      *
*   it under the terms of the GNU General Public License as published by      *
*   the Free Software Foundation; either version 2 of the License, or         *
*   (at your option) any later version.                                       *
*                                                                             *
*   This program is distributed in the hope that it will be useful,           *
*   but WITHOUT ANY WARRANTY; without even the implied warranty of            *
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
*   GNU General Public License for more details.                              *
*                                                                             *
*   You should have received a copy of the GNU General Public License         *
*   along with this program; if not, write to the Free Software               *
*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA  *
*                                                                             *
*                                                                             *
*                                                                             *
*   For further information contact me at johnvarouhakis@gmail.com            *
******************************************************************************/

#include "config.h"
#include "rmd_register_callbacks.h"

#include "rmd_types.h"

#include <signal.h>


// There seem to be no way of passing user data to the signal handler,
// so hack around not being able to pass ProgData to them
static int *pdata_running		= NULL;
static int *pdata_paused		= NULL;
static int *pdata_aborted		= NULL;
static int *pdata_pause_state_changed	= NULL;


static void rmdSetPaused(int signum) {

	*pdata_pause_state_changed = TRUE;
}

static void rmdSetRunning(int signum) {

	if (!*pdata_paused) {

		*pdata_running = FALSE;

		if (signum == SIGABRT) {
			*pdata_aborted = TRUE;
		}
	}
}

void rmdRegisterCallbacks(ProgData *pdata) {

	struct sigaction pause_act;
	struct sigaction end_act;

	// Is there some way to pass pdata to the signal handlers?
	pdata_running			= &pdata->running;
	pdata_paused			= &pdata->paused;
	pdata_aborted			= &pdata->aborted;
	pdata_pause_state_changed	= &pdata->pause_state_changed;
	
	// Setup pause_act
	sigfillset(&pause_act.sa_mask);
	pause_act.sa_flags   = SA_RESTART;
	pause_act.sa_handler = rmdSetPaused;

	sigaction(SIGUSR1, &pause_act, NULL);

	// Setup end_act
	sigfillset(&end_act.sa_mask);
	end_act.sa_flags   = SA_RESTART;
	end_act.sa_handler = rmdSetRunning;

	sigaction(SIGINT,  &end_act, NULL);
	sigaction(SIGTERM, &end_act, NULL);
	sigaction(SIGABRT, &end_act, NULL);
}
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