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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2005 The ScummVM project
*
* 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.
*
* $Header$
*/
#ifndef COMMON_TIMER_H
#define COMMON_TIMER_H
#include "common/scummsys.h"
#include "common/system.h"
#define MAX_TIMERS 2
#ifdef __MORPHOS__
#include "morphos_timer.h"
#else
class Timer {
public:
typedef void (*TimerProc)(void *refCon);
private:
OSystem *_system;
OSystem::MutexRef _mutex;
void *_timerHandler;
int32 _thisTime;
int32 _lastTime;
struct TimerSlots {
TimerProc procedure;
int32 interval;
int32 counter;
void *refCon;
} _timerSlots[MAX_TIMERS];
public:
Timer(OSystem *system);
~Timer();
/**
* Install a new timer callback. It will from now be called every interval microseconds.
* The timer may be invoked from a separate thread. Hence any timer code should be
* written following the same safety guidelines as any other threaded code.
*
* @note Although the interval is specified in microseconds, the actual timer resolution
* may be lower. In particular, with the SDL backend the timer resolution is 10ms.
* @param proc the callback
* @param interval the interval in which the timer shall be invoked (in microseconds)
* @param refCon an arbitrary void pointer; will be passed to the timer callback
* @return true if the timer was installed successfully, false otherwise
*/
bool installTimerProc(TimerProc proc, int32 interval, void *refCon);
/**
* Remove the given timer callback. It will not be invoked anymore.
*/
void removeTimerProc(TimerProc proc);
protected:
static int timer_handler(int t);
int handler(int t);
};
extern Timer *g_timer;
#endif
#endif
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