/*-------------------------------------------------------------------------------------------
 * 用来测试程序速度的类
 * 创建：杨斌 2011-11-19
 * ----------------------------------------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Windows.Forms;

namespace GeneralLib
{
    /// <summary>
    /// 用来测试程序速度的类
    /// </summary>
    class TimerCount
    {
        /// <summary>
        /// 上次记录的毫秒数
        /// </summary>
        private int TickCountBegin = 0;

        [DllImport("winmm")]
        static extern int timeGetTime();

        /// <summary>
        /// 获取系统启动后经过的毫秒数
        /// </summary>
        /// <returns></returns>
        public static int TickCount()
        {
            return Environment.TickCount;
            //return timeGetTime();
        }

        /// <summary>
        /// 开始计时，毫秒
        /// </summary>
        public void StartCount()
        {
            TickCountBegin = TickCount();            
        }

        /// <summary>
        /// 获取开始计时后经过的时间，毫秒
        /// </summary>
        /// <returns></returns>
        public int GetCountMS()
        {
            return TickCount() - TickCountBegin;
        }
        
        public static void Delay(long ms)
        {
            Stopwatch t = Stopwatch.StartNew();
            while (t.ElapsedMilliseconds < ms)
            {
                Application.DoEvents();
            }
        }

    }
}