public class MutexTest
{
private static int poolFlag = 0 ;//標記
private const int amountThread = 10 ;//線程總量
private const int maxThread = 3 ;//可執行線程最大數量
private static Mutex muxConsole = new Mutex() ;

public static void Main()
{
for ( int i = 0 ; i < amountThread ; i ++ )
{
// 創建指定數量的線程
// 是線程調用Run方法
// 啟動線程
Thread trd = new Thread( new ThreadStart( Run ) ) ;
trd.Name = "線程" + i ;
trd.Start() ;
}
}

public static void Run()
{

muxConsole.WaitOne(); //阻塞隊列
Interlocked.Increment(ref poolFlag) ; //標記+1
if (poolFlag != maxThread) //判斷是否等于上限
muxConsole.ReleaseMutex(); //如果此線程達不到可執行線程上限,則繼續開通,讓后面的線程進來
Console.WriteLine( "{0} 正在運行......\n", Thread.CurrentThread.Name ) ;
Thread.Sleep( 5000 ); //模擬執行
Console.WriteLine( "{0} 已經中止......\n", Thread.CurrentThread.Name ) ;

//標記-1
Interlocked.Decrement(ref poolFlag) ;
}
}