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- //==========================================================================
- // File: MutexSample.cs
- //
- // Summary: Example shows use of Mutex, AutoResetEvent and WaitHandle,
- // in threads.
- // Mutex.Mutex(bool,String)
- // Mutex.Mutex(bool)
- // Mutex.ReleaseMutex( )
- // Mutex.WaitAll(WaitHandle[])
- // Mutex.WaitAny(WaitHandle[])
- // Mutex.WaitOne(WaitHandle)
- // AutoResetEvent.AutoResetEvent(bool)
- // AutoResetEvent.Set( )
- // WaitHandle.WaitAll(WaitHandle[])
- //
- //----------------------------------------------------------------------------
- // This file is part of the Microsoft NGWS Runtime Samples.
- //
- // Copyright (C) 1998-2000 Microsoft Corporation. All rights reserved.
- //===========================================================================
- using System;
- using System.Threading;
-
- public class MutexSample
- {
- static Mutex gM1;
- static Mutex gM2;
- const int ITERS = 100;
- static AutoResetEvent Event1 = new AutoResetEvent(false);
- static AutoResetEvent Event2 = new AutoResetEvent(false);
- static AutoResetEvent Event3 = new AutoResetEvent(false);
- static AutoResetEvent Event4 = new AutoResetEvent(false);
-
- public static void Main(String[] args)
- {
- Console.WriteLine("MutexSample.cs ...");
- gM1 = new Mutex(true,"MyMutex"); // create Mutext initialOwned, with name of "MyMutex"
- gM2 = new Mutex(true); // create Mutext initialOwned, with no name.
- Console.WriteLine(" - Main Owns gM1 and gM2");
-
- AutoResetEvent[] evs = new AutoResetEvent[4];
- evs[0] = Event1; // Event for t1
- evs[1] = Event2; // Event for t2
- evs[2] = Event3; // Event for t3
- evs[3] = Event4; // Event for t4
-
- MutexSample tm = new MutexSample( );
- Thread t1 = new Thread(new ThreadStart(tm.t1Start));
- Thread t2 = new Thread(new ThreadStart(tm.t2Start));
- Thread t3 = new Thread(new ThreadStart(tm.t3Start));
- Thread t4 = new Thread(new ThreadStart(tm.t4Start));
- t1.Start( ); // Does Mutex.WaitAll(Mutex[] of gM1 and gM2)
- t2.Start( ); // Does Mutex.WaitOne(Mutex gM1)
- t3.Start( ); // Does Mutex.WaitAny(Mutex[] of gM1 and gM2)
- t4.Start( ); // Does Mutex.WaitOne(Mutex gM2)
-
- Thread.Sleep(2000);
- Console.WriteLine(" - Main releases gM1");
- gM1.ReleaseMutex( ); // t2 and t3 will end and signal
-
- Thread.Sleep(1000);
- Console.WriteLine(" - Main releases gM2");
- gM2.ReleaseMutex( ); // t1 and t4 will end and signal
-
- WaitHandle.WaitAll(evs); // waiting until all four threads signal that tey are done.
- Console.WriteLine("... MutexSample.cs");
- }
-
- public void t1Start( )
- {
- Console.WriteLine("t1Start started, Mutex.WaitAll(Mutex[])");
- Mutex[] gMs = new Mutex[2];
- gMs[0] = gM1; // Create and load an array of Mutex for WaitAll call
- gMs[1] = gM2;
- Mutex.WaitAll(gMs); // Waits until both Mutex are released
- Thread.Sleep(2000);
- Console.WriteLine("t1Start finished, Mutex.WaitAll(Mutex[])");
- Event1.Set( ); // AutoResetEvent.Set( ) flagging method is done
- }
-
- public void t2Start( )
- {
- Console.WriteLine("t2Start started, gM1.WaitOne( )");
- gM1.WaitOne( ); // Waits until Mutex gM1 is released
- Console.WriteLine("t2Start finished, gM1.WaitOne( )");
- Event2.Set( ); // AutoResetEvent.Set( ) flagging method is done
- }
-
- public void t3Start( )
- {
- Console.WriteLine("t3Start started, Mutex.WaitAny(Mutex[])");
- Mutex[] gMs = new Mutex[2];
- gMs[0] = gM1; // Create and load an array of Mutex for WaitAny call
- gMs[1] = gM2;
- Mutex.WaitAny(gMs); // Waits until either Mutex is released
- Console.WriteLine("t3Start finished, Mutex.WaitAny(Mutex[])");
- Event3.Set( ); // AutoResetEvent.Set( ) flagging method is done
- }
-
- public void t4Start( )
- {
- Console.WriteLine("t4Start started, gM2.WaitOne( )");
- gM2.WaitOne( ); // Waits until Mutex gM2 is released
- Console.WriteLine("t4Start finished, gM2.WaitOne( )");
- Event4.Set( ); // AutoResetEvent.Set( ) flagging method is done
- }
- }