/**
 * \file
 * <!--
 * This file is part of BeRTOS.
 *
 * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
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 *
 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
 *
 * -->
 *
 *
 * \author Bernie Innocenti <bernie@codewiz.org>
 *
 * \brief Watchdog module, supplies a simple API to manage wdt on supported target.
 *
 * $WIZ$ module_name = "wdt"
 * $WIZ$ module_configuration = "bertos/cfg/cfg_wdt.h"
 * $WIZ$ module_supports = "avr"
 */

#ifndef DRV_WDT_H
#define DRV_WDT_H

#include "cfg/cfg_wdt.h"

#include <cfg/compiler.h> // INLINE

/* Configury sanity check */
#if !defined(CONFIG_WATCHDOG) || (CONFIG_WATCHDOG != 0 && CONFIG_WATCHDOG != 1)
	#error CONFIG_WATCHDOG must be defined to either 0 or 1
#endif

#if OS_HOSTED
	#include <cpu/detect.h>
	#include <cfg/os.h>

	#if OS_QT
			#include <QtGui/QApplication>
	#elif OS_POSIX
		#include <sys/select.h>
	#else
		#error unknown CPU
	#endif
#elif CONFIG_WATCHDOG
	#include CPU_HEADER(wdt)
#endif /* CONFIG_WATCHDOG */


#if OS_HOSTED || !CONFIG_WATCHDOG

	/**
	 * Reset the watchdog timer.
	 */
	INLINE void wdt_reset(void)
	{
	#if CONFIG_WATCHDOG
		#if OS_POSIX
			static struct timeval tv = { 0, 0 };
			select(0, NULL, NULL, NULL, &tv);
		#endif
	#endif /* CONFIG_WATCHDOG */
	}

	/**
	 * Start the watchdog timer that fire at the select
	 * timeout.
	 *
	 * \param timeout this value is target dependant.
	 * See the target documentation for more details.
	 */
	INLINE void wdt_start(uint32_t timeout)
	{
	#if CONFIG_WATCHDOG
		#if OS_QT
			// Create a dummy QApplication object
			if (!qApp)
			{
				int argc;
				new QApplication(argc, (char **)NULL);
			}
			(void)timeout;
		#elif OS_POSIX
			(void)timeout; // NOP
		#endif
	#endif /* CONFIG_WATCHDOG */
		(void)timeout; // NOP
	}

	INLINE void wdt_stop(void)
	{
	#if CONFIG_WATCHDOG
		#if OS_QT
			// NOP
		#elif OS_POSIX
			// NOP
		#else
			#error unknown CPU
		#endif
	#endif /* CONFIG_WATCHDOG */
	}
#endif /* OS_HOSTED || !CONFIG_WATCHDOG */

#endif /* DRV_WDT_H */