SemaphoreSlim.WaitAsync Method (TimeSpan, CancellationToken)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Asynchronously waits to enter the SemaphoreSlim, using a TimeSpan to measure the time interval, while observing a CancellationToken.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Function WaitAsync ( _ timeout As TimeSpan, _ cancellationToken As CancellationToken _ ) As Task(Of Boolean)
Parameters
- timeout
- Type: System.TimeSpan
A TimeSpan that represents the number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely.
- cancellationToken
- Type: System.Threading.CancellationToken
The CancellationToken token to observe.
Return Value
Type: System.Threading.Tasks.Task(Of Boolean)A task that will complete with a result of true if the current thread successfully entered the SemaphoreSlim, otherwise with a result of false.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | millisecondsTimeout is a negative number other than -1, which represents an infinite time-out -or- timeout is greater than MaxValue. |
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