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/*

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This file is part of CanFestival, a library implementing CanOpen Stack. 

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Copyright (C): Edouard TISSERANT and Francis DUPIN

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See COPYING file for copyrights details.

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This library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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This library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with this library; if not, write to the Free Software

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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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*/

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#include <linux/spinlock.h>

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#include <linux/jiffies.h>

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#include <linux/timer.h>

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#include <linux/errno.h>

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#include "timer.h"

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#include "applicfg.h"

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static spinlock_t lock = SPIN_LOCK_UNLOCKED;

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static struct timer_list timer;

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static TIMEVAL last_time_read,

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	last_occured_alarm,

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	last_alarm_set;

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void TimerInit(void)

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{

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	/* only used in realtime apps */

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}

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void TimerCleanup(void)

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{

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	/* only used in realtime apps */

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}

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void EnterMutex(void)

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{

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	spin_lock (&lock);

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}

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void LeaveMutex(void)

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{

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	spin_unlock (&lock);

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}

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void timer_notify(unsigned long data)

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{

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	last_occured_alarm = last_alarm_set;

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	EnterMutex();

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	TimeDispatch();

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	LeaveMutex();

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}

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void StartTimerLoop(TimerCallback_t init_callback)

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{

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	getElapsedTime();

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	last_alarm_set = last_time_read;

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	last_occured_alarm = last_alarm_set;

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	init_timer(&timer);

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	timer.function = timer_notify;

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	EnterMutex();

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	// At first, TimeDispatch will call init_callback.

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	SetAlarm(NULL, 0, init_callback, 0, 0);

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	LeaveMutex();

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}

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void StopTimerLoop(TimerCallback_t exitfunction)

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{

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	EnterMutex();

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	del_timer (&timer);

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	exitfunction(NULL,0);

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	LeaveMutex();

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}

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void setTimer(TIMEVAL value)

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{

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	if (value == TIMEVAL_MAX)

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		return;

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	last_alarm_set = last_time_read + value;

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	mod_timer (&timer, last_alarm_set);

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}

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TIMEVAL getElapsedTime(void)

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{

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	last_time_read = jiffies;

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	return (long)last_time_read - (long)last_occured_alarm;

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}

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void CreateReceiveTask(CAN_PORT port, TASK_HANDLE *Thread, void* ReceiveLoopPtr)

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{

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	*Thread = kthread_run(ReceiveLoopPtr, port, "canReceiveLoop");

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}

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void WaitReceiveTaskEnd(TASK_HANDLE *Thread)

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{

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	force_sig (SIGTERM, *Thread);

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}