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ReaderWriterLockSlim.IsUpgradeableReadLockHeld 屬性

定義

取得值,表示目前執行緒是否已進入可升級模式的鎖定。

public:
 property bool IsUpgradeableReadLockHeld { bool get(); };
public bool IsUpgradeableReadLockHeld { get; }
member this.IsUpgradeableReadLockHeld : bool
Public ReadOnly Property IsUpgradeableReadLockHeld As Boolean

屬性值

如果目前執行緒已進入可升級模式,則為 true,否則為 false

範例

下列範例示範如何使用 IsUpgradeableReadLockHeld 屬性,在目前的執行緒意外進入可升級模式時產生判斷提示。

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))

備註

這個屬性適用于判斷提示或其他偵錯用途。 請勿使用它來控制程式執行的流程。

適用於