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87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2005 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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* $Header$
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*/
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#ifndef COMMON_TIMER_H
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#define COMMON_TIMER_H
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#include "common/scummsys.h"
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#include "common/mutex.h"
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#define MAX_TIMERS 2
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#ifdef __MORPHOS__
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#include "morphos_timer.h"
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#else
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class OSystem;
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class Timer {
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public:
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typedef void (*TimerProc)(void *refCon);
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private:
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OSystem *_system;
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Common::MutexRef _mutex;
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void *_timerHandler;
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int32 _thisTime;
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int32 _lastTime;
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struct TimerSlots {
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TimerProc procedure;
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int32 interval;
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int32 counter;
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void *refCon;
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} _timerSlots[MAX_TIMERS];
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public:
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Timer(OSystem *system);
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~Timer();
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/**
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* Install a new timer callback. It will from now be called every interval microseconds.
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* The timer may be invoked from a separate thread. Hence any timer code should be
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* written following the same safety guidelines as any other threaded code.
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*
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* @note Although the interval is specified in microseconds, the actual timer resolution
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* may be lower. In particular, with the SDL backend the timer resolution is 10ms.
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* @param proc the callback
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* @param interval the interval in which the timer shall be invoked (in microseconds)
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* @param refCon an arbitrary void pointer; will be passed to the timer callback
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* @return true if the timer was installed successfully, false otherwise
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*/
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bool installTimerProc(TimerProc proc, int32 interval, void *refCon);
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/**
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* Remove the given timer callback. It will not be invoked anymore.
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*/
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void removeTimerProc(TimerProc proc);
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protected:
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static int timer_handler(int t);
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int handler(int t);
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};
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extern Timer *g_timer;
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#endif
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#endif
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