WaitUtil.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace OnlineStore.Common
{
public class WaitUtil
{
public delegate bool IsOk();
/// <summary>
/// 使用异步委托检测超时，防止isOk方法不返回结果导致卡死的问题
/// </summary>
/// <param name="waitName"></param>
/// <param name="timeout"></param>
/// <param name="isOk"></param>
public static bool Wait(int timeout, IsOk isOk, string waitName = "")
{
Task w = Task.Delay(timeout);
Task p = Task.Run(() =>
{
while (isOk.Invoke())
{
Task.Delay(100).Wait();
}
});
Task.WaitAny(w,p);
return true;
//p.Wait();
//return p.Result;
/*
DateTime startTime = System.DateTime.Now;
TimeSpan timoutSpan = TimeSpan.FromMilliseconds(timeout);
TimeSpan waitSpan = TimeSpan.FromMilliseconds(0);
int sleepTime = 10;
while (true)
{
TimeSpan remainTimes = timoutSpan.Subtract(waitSpan);
if (remainTimes.TotalMilliseconds < 0)
{
//已经超时
throw new TimeoutException(waitName + "超时");
}
try
{
IAsyncResult re = isOk.BeginInvoke(null, null);
var waitResult = re.AsyncWaitHandle.WaitOne(remainTimes);
if (waitResult)
{
bool okResult = isOk.EndInvoke(re);
if (okResult)
{
return true;
}
}
}
catch (Exception ex)
{
LogUtil.error("同步等待出现异常：" + ex.Message);
}
Thread.Sleep(sleepTime);
waitSpan = System.DateTime.Now.Subtract(startTime);
}
*/
}
}
}