ReaderWriterLockSlim.IsReadLockHeld 屬性

定義

命名空間:
System.Threading
組件:
System.Threading.dll, System.Core.dll, netstandard.dll

取得值，表示目前執行緒是否已進入讀取模式的鎖定。Gets a value that indicates whether the current thread has entered the lock in read mode.

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

屬性值

Boolean

如果目前執行緒已進入讀取模式，則為 true，否則為 false。true if the current thread has entered read mode; otherwise, false.

範例

下列範例顯示如何使用IsReadLockHeld屬性, 以在目前線程意外進入讀取模式時產生判斷提示。The following example shows how to use the IsReadLockHeld property to generate an assert if the current thread has entered read mode unexpectedly.

using (ReaderWriterLockSlim rwLock = new ReaderWriterLockSlim()) {

Using rwLock As New ReaderWriterLockSlim()

Debug.Assert(!rwLock.IsReadLockHeld,
    String.Format("Thread {0} already held the read lock when MyFunction began executing.",
                  Thread.CurrentThread.ManagedThreadId));

Debug.Assert(Not rwLock.IsReadLockHeld, _
    String.Format("Thread {0} already held the read lock when MyFunction began executing.", _
                  Thread.CurrentThread.ManagedThreadId))

備註

這個屬性適用于判斷提示, 或用於其他的偵錯工具。This property is intended for use in asserts or for other debugging purposes. 請勿使用它來控制程式執行的流程。Do not use it to control the flow of program execution.

適用於