ReaderWriterLockSlim.WaitingUpgradeCount Property
Definition
Important
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Gets the total number of threads that are waiting to enter the lock in upgradeable mode.
public:
property int WaitingUpgradeCount { int get(); };public int WaitingUpgradeCount { get; }member this.WaitingUpgradeCount : intPublic ReadOnly Property WaitingUpgradeCount As IntegerProperty Value
The total number of threads that are waiting to enter upgradeable mode.
Examples
The following example shows how to use the WaitingUpgradeCount property to generate an event log entry if the number of threads that are blocked, waiting to enter upgradeable mode, exceeds a threshold.
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
Remarks
Use this property only for debugging, profiling, and logging purposes, and not to control the behavior of an algorithm. The results can change as soon as they have been calculated. Therefore, it is not safe to make decisions based on this property.
