mirror of
https://git.do.srb2.org/STJr/UltimateZoneBuilder.git
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163 lines
3.4 KiB
C#
163 lines
3.4 KiB
C#
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#region ================== Copyright (c) 2007 Pascal vd Heiden
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/*
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* Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
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* This program is released under GNU General Public License
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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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*/
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#endregion
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#region ================== Namespaces
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Text;
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using System.Runtime.InteropServices;
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using System.Diagnostics;
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#endregion
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namespace CodeImp.DoomBuilder
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{
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public class Clock
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{
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#region ================== Declarations
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//#if !LINUX
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[DllImport("kernel32.dll")]
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private static extern short QueryPerformanceCounter(ref long x);
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[DllImport("kernel32.dll")]
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private static extern short QueryPerformanceFrequency(ref long x);
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//#endif
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#endregion
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#region ================== Constants
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// Set to true enable QPC if possible
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private const bool USE_QPC = true;
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// Frequency indicating QPC unavailable
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private const long FREQ_NO_QPC = -1;
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#endregion
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#region ================== Variables
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// Settings
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private long timefrequency = FREQ_NO_QPC;
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private double timescale;
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private double currenttime;
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// Disposing
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private bool isdisposed = false;
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#endregion
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#region ================== Properties
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// Settings
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public bool IsUsingQPC { get { return (timefrequency != FREQ_NO_QPC); } }
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public double CurrentTime { get { return currenttime; } }
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// Disposing
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public bool IsDisposed { get { return isdisposed; } }
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#endregion
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#region ================== Constructor / Disposer
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// Constructor
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public Clock()
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{
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// Only windows has QPC
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//#if !LINUX
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if(Environment.OSVersion.Platform != PlatformID.Unix)
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{
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// Get the high resolution clock frequency
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if((QueryPerformanceFrequency(ref timefrequency) == 0) || !USE_QPC)
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{
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// No high resolution clock available
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timefrequency = FREQ_NO_QPC;
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}
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else
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{
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// Calculate the time scale
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timescale = (1d / (double)timefrequency) * 1000d;
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}
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}
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//#endif
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// We have no destructor
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GC.SuppressFinalize(this);
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}
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// Disposer
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public void Dispose()
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{
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// Not already disposed?
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if(!isdisposed)
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{
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// Clean up
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// Done
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isdisposed = true;
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}
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}
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#endregion
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#region ================== Methods
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// This queries the system for the current time
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public double GetCurrentTime()
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{
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// Only windows has QPC
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//#if !LINUX
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long timecount = 0;
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// High resolution clock available?
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if(timefrequency != FREQ_NO_QPC)
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{
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// Get the high resolution count
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QueryPerformanceCounter(ref timecount);
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// Calculate high resolution time in milliseconds
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currenttime = (double)timecount * timescale;
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}
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else
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{
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// Use standard clock
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currenttime = (double)Environment.TickCount;
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}
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/*
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#else
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// In LINUX always use standard clock
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currenttime = (double)Environment.TickCount;
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#endif
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*/
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// Return the current time
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return currenttime;
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}
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#endregion
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}
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}
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