线程同步问题，谁帮忙看一下代码，急需

[harrysucceed]

我想实现的目的是同时创建5个并发执行的线程，当一个执行完后下一个才可以进入，但有时一次进去6个，最让我头疼的，哪位麻烦帮改改！！！
class Program
{
private static int numThreads = Convert.ToInt32(Console.ReadLine()); //输入一大于五的数
private static int poolFlag = 0;
private static Mutex mut = new Mutex();
private const int numIterations = 1;
//private const int numThreads;
private const int maxThread = 4;//可执行线程最大数量
private static int j = 0;
static void Main(string[] args)
{
Console.WriteLine("可执行的文件数是：{0}",numThreads);
while ( j < numThreads)
{
if (poolFlag < maxThread & numThreads > 5)
{
Thread myThread = new Thread(new ThreadStart(MyThreadProc));
myThread.Name = String.Format("Thread{0}", j + 1);
j++;
myThread.Start();

}

}

}

private static void MyThreadProc()
{
mut.WaitOne();
Interlocked.Increment(ref poolFlag);
Console.WriteLine("{0} has entered the protected area, poolFlag is {1}",
Thread.CurrentThread.Name, poolFlag);
mut.ReleaseMutex();// Release the Mutex.
Thread.Sleep(1000);
Interlocked.Decrement(ref poolFlag);
Console.WriteLine("{0} is leaving the protected area, poolFlag is {1}",
Thread.CurrentThread.Name, poolFlag);
Console.ReadLine();
}
}

[jzywh]

既然是顺序执行那还开那么多并行线程干什么?

开一个线程,然后在线程里面for循环5次就应该能满足你的需求了

[hecker728]

thread.Join();
用这个很适合你。参考msdn的解释和例子

[zenowolf]

Mutex 控制线程同步么？

[这个还能被注册？]

static object obj = new object();//新建个静态对象
private static void MyThreadProc() 
        { 
           lock(obj)//线程执行该方法时锁定对象，如果有其他线程要访问该对象必须等该对象被释放以后
{
          mut.WaitOne(); 
          Interlocked.Increment(ref poolFlag);      
          Console.WriteLine("{0} has entered the protected area, poolFlag is {1}", 
          Thread.CurrentThread.Name, poolFlag); 
          mut.ReleaseMutex();// Release the Mutex. 
          Thread.Sleep(1000); 
          Interlocked.Decrement(ref poolFlag); 
          Console.WriteLine("{0} is leaving the protected area, poolFlag is {1}", 
          Thread.CurrentThread.Name, poolFlag);          
          Console.ReadLine(); 
}
        }

[chinese_zmm]

private static Mutex mut = new Mutex();
可以换成
private static AutoResetEvent mut = new AutoResetEvent(false);
这个在释放以后可以直接重置

[无天]

互斥，临界区，同步。这些方法都可以的。