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ReaderWriterLock::ReleaseWriterLock Method ()
.NET Framework (current version)
Decrements the lock count on the writer lock.
Assembly: mscorlib (in mscorlib.dll)
| Exception | Condition |
|---|---|
| ApplicationException | The thread does not have the writer lock. |
ReleaseWriterLock decrements the writer lock count. When the count reaches zero, the writer lock is released.
 Note |
|---|
If a thread has a reader lock, or no locks, calling ReleaseWriterLock throws an ApplicationException. |
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 namespace System; using namespace System::Threading; public ref class Test { public: // Declaring the ReaderWriterLock at the class level // makes it visible to all threads. static ReaderWriterLock^ rwl = gcnew 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 the writer lock, and // how to handle time-outs. static void WriteToResource( int timeOut ) { try { rwl->AcquireWriterLock( timeOut ); try { // It is safe for this thread to read or write // from the shared resource. resource = rnd->Next( 500 ); Display( String::Format( "writes resource value {0}", resource ) ); Interlocked::Increment( writes ); } finally { // Ensure that the lock is released. rwl->ReleaseWriterLock(); } } catch ( ApplicationException^ ) { // The writer lock request timed out. Interlocked::Increment( writerTimeouts ); } }
.NET Framework
Available since 1.1
Available since 1.1
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