ReaderWriterLock.ReleaseWriterLock Method

Definition

Namespace:

System.Threading

Assemblies:

netstandard.dll, System.Threading.dll

Source:

ReaderWriterLock.cs

Decrements the lock count on the writer lock.

public void ReleaseWriterLock();

Exceptions

ApplicationException

The thread does not have the writer lock.

Examples

The following code example shows how to acquire and release a writer lock, and how to handle the exception thrown when a request times out.

This code is part of a larger example provided for the ReaderWriterLock class.

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

public class Example
{
   static ReaderWriterLock rwl = new ReaderWriterLock();
   // Define the shared resource protected by the ReaderWriterLock.
   static int resource = 0;

// Request and release the writer lock, and handle time-outs.
static void WriteToResource(Random rnd, int timeOut)
{
   try {
      rwl.AcquireWriterLock(timeOut);
      try {
         // It's safe for this thread to access from the shared resource.
         resource = rnd.Next(500);
         Display("writes resource value " + resource);
         Interlocked.Increment(ref writes);
      }
      finally {
         // Ensure that the lock is released.
         rwl.ReleaseWriterLock();
      }
   }
   catch (ApplicationException) {
      // The writer lock request timed out.
      Interlocked.Increment(ref writerTimeouts);
   }
}

}

Remarks

ReleaseWriterLock decrements the writer lock count. When the count reaches zero, the writer lock is released.

Uwaga

If a thread has a reader lock, or no locks, calling ReleaseWriterLock throws an ApplicationException.

Applies to

See also

• Managed Threading
• ReaderWriterLock