55 lines
1.5 KiB
C#
55 lines
1.5 KiB
C#
using System.Diagnostics;
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using System.Threading;
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namespace MAME.Core
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{
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public class Wintime
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{
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//[DllImport("kernel32.dll ")]
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//public static extern bool QueryPerformanceCounter(ref long lpPerformanceCount);
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//[DllImport("kernel32.dll")]
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//private static extern bool QueryPerformanceFrequency(ref long PerformanceFrequency);
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#region 跨平台等效实现
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public static Stopwatch _stopwatch = Stopwatch.StartNew();
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private static long _lastReportedCount = 0;
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public static bool QueryPerformanceCounter(ref long lpPerformanceCount)
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{
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lpPerformanceCount = _stopwatch.ElapsedTicks;
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return true;
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}
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public static bool QueryPerformanceFrequency(ref long PerformanceFrequency)
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{
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PerformanceFrequency = Stopwatch.Frequency;
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return true;
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}
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#endregion
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public static long ticks_per_second;
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public static void wintime_init()
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{
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long b = 0;
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QueryPerformanceFrequency(ref b);
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ticks_per_second = b;
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}
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public static long osd_ticks()
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{
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long a = 0;
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QueryPerformanceCounter(ref a);
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return a;
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}
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public static void osd_sleep(long duration)
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{
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int msec;
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msec = (int)(duration * 1000 / ticks_per_second);
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if (msec >= 2)
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{
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msec -= 2;
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Thread.Sleep(msec);
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}
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}
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}
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} |