cyf
77 lines
2.0 KiB
C#
77 lines
2.0 KiB
C#
using System;
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using System.ComponentModel;
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using System.Runtime.InteropServices;
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namespace Zhaizj.Framework {
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/// <summary>
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/// 秒表，用于测试程序耗时
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/// </summary>
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public class Stopwatch {
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private Boolean _IsStop;
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private long frequency;
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private decimal multiplier = 1000000000M;
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private long start;
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private long stop;
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[DllImport( "KERNEL32" )]
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private static extern Boolean QueryPerformanceCounter( out long lpPerformanceCount );
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[DllImport( "Kernel32.dll" )]
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private static extern Boolean QueryPerformanceFrequency( out long lpFrequency );
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public Stopwatch() {
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if (!QueryPerformanceFrequency( out this.frequency )) {
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throw new Win32Exception();
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}
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}
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/// <summary>
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/// 开始启动
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/// </summary>
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public void Start() {
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this._IsStop = false;
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QueryPerformanceCounter( out this.start );
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}
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/// <summary>
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/// 停止
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/// </summary>
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public void Stop() {
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if (!this._IsStop) {
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QueryPerformanceCounter( out this.stop );
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this._IsStop = true;
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}
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}
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/// <summary>
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/// 总共耗时(毫秒)
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/// </summary>
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public double ElapsedMilliseconds {
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get {
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double result = this.getDuration() / 1000000.0;
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if (result < 0) result = 0;
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return result;
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}
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}
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/// <summary>
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/// 总共耗时(秒)
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/// </summary>
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public double ElapsedSeconds {
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get {
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double result = this.ElapsedMilliseconds / 1000.0;
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if (result < 0) result = 0;
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return result;
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}
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}
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private double getDuration() {
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return (((this.stop - this.start) * ((double)this.multiplier)) / ((double)this.frequency));
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}
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}
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}
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