ReaderWriterLockSlim.WaitingUpgradeCount 屬性

定義

命名空間:

System.Threading

組件:

System.Threading.dll

來源:

ReaderWriterLockSlim.cs

取得等待進入可升級模式鎖定狀態的執行緒總數。

public:
 property int WaitingUpgradeCount { int get(); };

public int WaitingUpgradeCount { get; }

member this.WaitingUpgradeCount : int

Public ReadOnly Property WaitingUpgradeCount As Integer

屬性值

Int32

等待進入可升級模式的執行緒總數。

範例

下列範例示範如何使用 WaitingUpgradeCount 屬性來產生事件記錄檔專案，如果封鎖的執行緒數目，等候進入可升級模式，就會超過臨界值。

using (ReaderWriterLockSlim rwLock = new ReaderWriterLockSlim()) {

Using rwLock As New ReaderWriterLockSlim()

int waitingUpgradeableReadCt = rwLock.WaitingUpgradeCount;
if (waitingUpgradeableReadCt > UPGRADEABLEREAD_THRESHOLD)
{
    performanceLog.WriteEntry(String.Format(
        "{0} blocked upgradeable reader threads; exceeds recommended maximum.", 
        waitingUpgradeableReadCt));
}

Dim waitingUpgradeableReadCt As Integer = rwLock.WaitingUpgradeCount
If waitingUpgradeableReadCt > UPGRADEABLEREAD_THRESHOLD Then
    performanceLog.WriteEntry(String.Format( _
        "{0} blocked upgradeable reader threads; exceeds recommended maximum.", _
        waitingUpgradeableReadCt))
End If

備註

僅針對偵錯、分析及記錄目的使用這個屬性，而不是控制演算法的行為。 結果可以在計算結果後立即變更。 因此，根據這個屬性做出決策並不安全。