ReaderWriterLockSlim.IsUpgradeableReadLockHeld 属性

定义

命名空间:

System.Threading

程序集:

System.Threading.dll

Source:

ReaderWriterLockSlim.cs

获取一个值，该值指示当前线程是否已进入可升级模式的锁定状态。

public:
 property bool IsUpgradeableReadLockHeld { bool get(); };

public bool IsUpgradeableReadLockHeld { get; }

member this.IsUpgradeableReadLockHeld : bool

Public ReadOnly Property IsUpgradeableReadLockHeld As Boolean

属性值

Boolean

如果当前线程已进入可升级模式，则为 true；否则为 false。

示例

以下示例演示如何在当前线程意外进入可升级模式时使用 IsUpgradeableReadLockHeld 属性生成断言。

using (ReaderWriterLockSlim rwLock = new ReaderWriterLockSlim()) {

Using rwLock As New ReaderWriterLockSlim()

Debug.Assert(!rwLock.IsUpgradeableReadLockHeld,
    String.Format("Thread {0} has entered the upgradeable read lock while MyFunction is still executing.",
                  Thread.CurrentThread.ManagedThreadId));

Debug.Assert(Not rwLock.IsUpgradeableReadLockHeld, _
    String.Format("Thread {0} has entered the upgradeable read lock while MyFunction is still executing.", _
                  Thread.CurrentThread.ManagedThreadId))

注解

此属性适用于断言或其他调试目的。 不要使用它来控制程序执行流。