互斥鎖(Mutex)
互斥鎖是一個互斥的同步對象,意味着同一時間有且僅有一個線程可以獲取它。
互斥鎖可適用於一個共享資源每次只能被一個線程訪問的情況
函數:
//創建一個處於未獲取狀態的互斥鎖
Public Mutex();
//如果owned為true,互斥鎖的初始狀態就是被主線程所獲取,否則處於未獲取狀態
Public Mutex(bool owned);
如果要獲取一個互斥鎖。應調用互斥鎖上的WaitOne()方法,該方法繼承於Thread.WaitHandle類
它處於等到狀態直至所調用互斥鎖可以被獲取,因此該方法將組織住主調線程直到指定的互斥鎖可用,如果不需要擁有互斥鎖,用ReleaseMutex方法釋放,從而使互斥鎖可以被另外一個線程所獲取。
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; namespace MyTTCon { class shareRes { public static int count = 0; public static Mutex mutex = new Mutex(); } class IncThread { int number; public Thread thrd; public IncThread(string name, int n) { thrd = new Thread(this.run); number = n; thrd.Name = name; thrd.Start(); } void run() { Console.WriteLine(thrd.Name + "正在等待 the mutex"); //申請 shareRes.mutex.WaitOne(); Console.WriteLine(thrd.Name + "申請到 the mutex"); do { Thread.Sleep(1000); shareRes.count++; Console.WriteLine("In " + thrd.Name + "ShareRes.count is " + shareRes.count); number--; } while (number > 0); Console.WriteLine(thrd.Name + "釋放 the nmutex"); // 釋放 shareRes.mutex.ReleaseMutex(); } } class DecThread { int number; public Thread thrd; public DecThread(string name, int n) { thrd = new Thread(this.run); number = n; thrd.Name = name; thrd.Start(); } void run() { Console.WriteLine(thrd.Name + "正在等待 the mutex"); //申請 shareRes.mutex.WaitOne(); Console.WriteLine(thrd.Name + "申請到 the mutex"); do { Thread.Sleep(1000); shareRes.count--; Console.WriteLine("In " + thrd.Name + "ShareRes.count is " + shareRes.count); number--; } while (number > 0); Console.WriteLine(thrd.Name + "釋放 the nmutex"); // 釋放 shareRes.mutex.ReleaseMutex(); } } class Program { static void Main(string[] args) { IncThread mthrd1 = new IncThread("IncThread thread ", 5); DecThread mthrd2 = new DecThread("DecThread thread ", 5); mthrd1.thrd.Join(); mthrd2.thrd.Join(); } } }
原文鏈接:http://www.cnblogs.com/tianzhiliang/archive/2010/09/01/1814822.html