我正在编写一个程序,我通常会启动五个线程.线程以非确定的顺序返回.每个线程都在调用一个返回List的方法.
我这样做:
var masterList = List<string>();
foreach (var threadParam in threadParams)
{
var expression = threadParam ;
ThreadStart sub = () => MyMethod(expressions);
var thread = new Thread(sub)
{
Name = expression
};
listThreads.Add(thread);
thread.Start();
}
var abort = true;
while (abort) //Wait until all threads finish
{
var count = 0;
foreach (var list in listThreads)
{
if (!list.IsAlive)
{
count++;
}
}
if (count == listThreads.Count)
{
abort = false;
}
}
所以这是问题所在:
每个线程终止时返回一个列表,我想追加前面声明的masterList.
怎么会这样呢？
另外我知道必须有比下面更好的方法来等待所有线程完成
var abort = true;
while (abort) //Wait until all threads finish
{
var count = 0;
foreach (var list in listThreads)
{
if (!list.IsAlive)
{
count++;
}
}
if (count == listThreads.Count)
{
abort = false;
}
}
And*_*ech 14
用一个 WaitHandle
这是一个例子:
using System;
using System.Threading;
class ThreadSleeper
{
int seconds;
AutoResetEvent napDone = new AutoResetEvent(false);
private ThreadSleeper(int seconds)
{
this.seconds = seconds;
}
public void Nap()
{
Console.WriteLine("Napping {0} seconds", seconds);
Thread.Sleep(seconds * 1000);
Console.WriteLine("{0} second nap finished", seconds);
napDone.Set();
}
public static WaitHandle DoSleep(int seconds)
{
ThreadSleeper ts = new ThreadSleeper(seconds);
Thread thread = new Thread(new ThreadStart(ts.Nap));
thread.Start();
return(ts.napDone);
}
}
public class OperationsThreadsWaitingwithWaitHandle
{
public static void Main()
{
WaitHandle[] waits = new WaitHandle[2];
waits[0] = ThreadSleeper.DoSleep(8);
waits[1] = ThreadSleeper.DoSleep(4);
Console.WriteLine("Waiting for threads to finish");
WaitHandle.WaitAll(waits);
Console.WriteLine("Threads finished");
}
}
要检查的链接: