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ReaderWriterLock.ReleaseReaderLock, méthode

Décrémente le nombre de verrous.

Espace de noms : System.Threading
Assembly : mscorlib (dans mscorlib.dll)

public void ReleaseReaderLock ()
public void ReleaseReaderLock ()
public function ReleaseReaderLock ()

Type d'exceptionCondition

ApplicationException

Le thread n'a pas de verrous de writer ou de lecteur.

ReleaseReaderLock décrémente le nombre de verrous. Dès que le nombre est égal à zéro, le verrou est libéré.

RemarqueRemarque

Si le thread détient le verrou de writer, l'appel de ReleaseReaderLock donne le même résultat que l'appel de ReleaseWriterLock. Si un thread n'a aucun verrou, l'appel de ReleaseReaderLock lève une ApplicationException.

// The complete code is located in the ReaderWriterLock
// class topic.
using System;
using System.Threading;

public class Test
{
    // Declaring the ReaderWriterLock at the class level
    // makes it visible to all threads.
    static ReaderWriterLock rwl = new ReaderWriterLock();
    // For this example, the shared resource protected by the
    // ReaderWriterLock is just an integer.
    static int resource = 0;
...    // Shows how to request and release a reader lock, and
    // how to handle time-outs.
    static void ReadFromResource(int timeOut)
    {
        try
        {
            rwl.AcquireReaderLock(timeOut);
            try
            {
                // It is safe for this thread to read from
                // the shared resource.
                Display("reads resource value " + resource); 
                Interlocked.Increment(ref reads);
            }        
            finally
            {
                // Ensure that the lock is released.
                rwl.ReleaseReaderLock();
            }
        }
        catch (ApplicationException)
        {
            // The reader lock request timed out.
            Interlocked.Increment(ref readerTimeouts);
        }
    }
...}

// The complete code is located in the ReaderWriterLock
// class topic.
import System.*;
import System.Threading.*;
import System.Threading.Thread;    

public class Test
{
    // Declaring the ReaderWriterLock at the class level
    // makes it visible to all threads.
    private static ReaderWriterLock rwl = new ReaderWriterLock();

    // For this example, the shared resource protected by the
    // ReaderWriterLock is just an integer.
    private static int resource = 0;
...    // Shows how to request and release a reader lock, and
    // how to handle time-outs.
    static void ReadFromResource(int timeOut)
    {
        try {
            rwl.AcquireReaderLock(timeOut);
            try {
                // It is safe for this thread to read from
                // the shared resource.
                Display(("reads resource value " + resource));
                Interlocked.Increment(reads);
            }
            finally {
                // Ensure that the lock is released.
                rwl.ReleaseReaderLock();
            }
        }
        catch (ApplicationException exp) {
            // The reader lock request timed out.
            Interlocked.Increment(readerTimeouts);
        }
    } //ReadFromResource
...}

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Édition Media Center, Windows XP Professionnel Édition x64, Windows XP SP2, Windows XP Starter Edition

Le .NET Framework ne prend pas en charge toutes les versions de chaque plate-forme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise.

.NET Framework

Prise en charge dans : 2.0, 1.1, 1.0
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