ReaderWriterLock.IsWriterLockHeld 属性
定义
重要
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获取一个值，该值指示当前线程是否持有写入器锁。
public:
property bool IsWriterLockHeld { bool get(); };public bool IsWriterLockHeld { get; }member this.IsWriterLockHeld : boolPublic ReadOnly Property IsWriterLockHeld As Boolean属性值
true 如果当前线程持有写入器锁，则为否则，为 false.
示例
下面的代码示例演示了当尝试获取具有编写器锁的线程上的读取器锁时，不会授予读取器锁， ReaderWriterLock 而是递增写入器锁上的锁计数。
using System;
using System.Threading;
class LockHeld
{
static void Main()
{
ReaderWriterLock rwLock = new ReaderWriterLock();
rwLock.AcquireWriterLock(Timeout.Infinite);
rwLock.AcquireReaderLock(Timeout.Infinite);
if(rwLock.IsReaderLockHeld)
{
Console.WriteLine("Reader lock held.");
rwLock.ReleaseReaderLock();
}
else if(rwLock.IsWriterLockHeld)
{
Console.WriteLine("Writer lock held.");
rwLock.ReleaseWriterLock();
}
else
{
Console.WriteLine("No locks held.");
}
if(rwLock.IsReaderLockHeld)
{
Console.WriteLine("Reader lock held.");
rwLock.ReleaseReaderLock();
}
else if(rwLock.IsWriterLockHeld)
{
Console.WriteLine("Writer lock held.");
rwLock.ReleaseWriterLock();
}
else
{
Console.WriteLine("No locks held.");
}
}
}
Imports System.Threading
Public Class LockHeld
<MTAThread> _
Shared Sub Main()
Dim rwLock As New ReaderWriterLock()
rwLock.AcquireWriterLock(Timeout.Infinite)
rwLock.AcquireReaderLock(Timeout.Infinite)
If rwLock.IsReaderLockHeld Then
Console.WriteLine("Reader lock held.")
rwLock.ReleaseReaderLock()
Else If rwLock.IsWriterLockHeld Then
Console.WriteLine("Writer lock held.")
rwLock.ReleaseWriterLock()
Else
Console.WriteLine("No locks held.")
End If
If rwLock.IsReaderLockHeld Then
Console.WriteLine("Reader lock held.")
rwLock.ReleaseReaderLock()
Else If rwLock.IsWriterLockHeld Then
Console.WriteLine("Writer lock held.")
rwLock.ReleaseWriterLock()
Else
Console.WriteLine("No locks held.")
End If
End Sub
End Class
