89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
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/*
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** Command & Conquer Renegade(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (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, see <http://www.gnu.org/licenses/>.
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*/
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/***********************************************************************************************
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*** Confidential - Westwood Studios ***
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***********************************************************************************************
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* *
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* Project Name : Installer *
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* *
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* $Archive:: /Commando/Code/Installer/SafeTimer.h $*
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* *
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* $Author:: Ian_l $*
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* *
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* $Modtime:: 11/05/01 7:41p $*
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* *
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* $Revision:: 2 $*
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#ifndef _SAFE_TIMER_H
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#define _SAFE_TIMER_H
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// Includes.
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#include "win.h"
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#include <mmsystem.h>
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// This timer increments at 1000Hz, is DWORD size and uses the OS timer timeGetTime().
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// Therefore it will wrap ~49 days after boot time. This class attempts to minimize
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// the possibility of the timer wrapping by offsetting time from the point at which
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// the application starts up. It will still, however, fail if the application is
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// active for > ~49 days.
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class SafeTimerClass
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{
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public:
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long operator () (void) const;
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operator long (void) const;
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private:
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static DWORD _StartTime;
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};
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inline long SafeTimerClass::operator () (void) const
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{
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DWORD time = timeGetTime();
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// Has the timer wrapped?
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if (time >= _StartTime) {
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return (time - _StartTime);
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} else {
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return ((0xffffffff - _StartTime) + time);
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}
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}
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inline SafeTimerClass::operator long (void) const
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{
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DWORD time = timeGetTime();
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// Has the timer wrapped?
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if (time >= _StartTime) {
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return (time - _StartTime);
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} else {
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return ((0xffffffff - _StartTime) + time);
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}
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}
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#endif // _SAFE_TIMER_H
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