elapsedtime.cs

来自「破解的飞信源代码」· CS 代码 · 共 53 行

namespace NCindy.Util
{
    using System;

    public sealed class ElapsedTime
    {
        private static TimeProvider provider = new SimpleProvider();
        private long startTime = provider.GetCurrentTime();

        public long GetElapsedTime()
        {
            return this.GetElapsedTime(provider.GetCurrentTime());
        }

        private long GetElapsedTime(long currentTime)
        {
            if (this.startTime > currentTime)
            {
                return provider.ToMillisecond((0x7fffffff + currentTime) - this.startTime);
            }
            return provider.ToMillisecond(currentTime - this.startTime);
        }

        public long Reset()
        {
            long currentTime = provider.GetCurrentTime();
            long elapsedTime = this.GetElapsedTime(currentTime);
            this.startTime = currentTime;
            return elapsedTime;
        }

        private class SimpleProvider : ElapsedTime.TimeProvider
        {
            public long GetCurrentTime()
            {
                return (long) Environment.TickCount;
            }

            public long ToMillisecond(long time)
            {
                return time;
            }
        }

        private interface TimeProvider
        {
            long GetCurrentTime();
            long ToMillisecond(long time);
        }
    }
}