Timeout Class
Contains constants that specify infinite time-out intervals. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
| Name | Description | |
|---|---|---|
![]() ![]() | Infinite | A constant used to specify an infinite waiting period, for threading methods that accept an Int32 parameter. |
![]() ![]() | InfiniteTimeSpan | A constant used to specify an infinite waiting period, for methods that accept a TimeSpan parameter. |
The members of this class are used to specify infinite time-out intervals in threading operations. Infinite is used by methods that accept an integer millisecondsTimeout parameter, such as Thread.Sleep(Int32), Thread.Join(Int32), and ReaderWriterLock.AcquireReaderLock(Int32). InfiniteTimeSpan is used by methods that accept a timeout parameter of type TimeSpan, such as Thread.Sleep(TimeSpan), Thread.Join(TimeSpan), and ReaderWriterLock.AcquireReaderLock(TimeSpan).
The following example shows a thread going to sleep for an infinite time and subsequently being woken up.
Option Explicit Option Strict Imports System Imports System.Security.Permissions Imports System.Threading Public Class ThreadInterrupt <MTAThread> _ Shared Sub Main() Dim stayAwake As New StayAwake() Dim newThread As New Thread(AddressOf stayAwake.ThreadMethod) newThread.Start() ' The following line causes an exception to be thrown ' in ThreadMethod if newThread is currently blocked ' or becomes blocked in the future. newThread.Interrupt() Console.WriteLine("Main thread calls Interrupt on newThread.") ' Tell newThread to go to sleep. stayAwake.SleepSwitch = True ' Wait for newThread to end. newThread.Join() End Sub End Class Public Class StayAwake Dim sleepSwitchValue As Boolean = False WriteOnly Property SleepSwitch As Boolean Set sleepSwitchValue = Value End Set End Property Sub New() End Sub Sub ThreadMethod() Console.WriteLine("newThread is executing ThreadMethod.") While Not sleepSwitchValue ' Use SpinWait instead of Sleep to demonstrate the ' effect of calling Interrupt on a running thread. Thread.SpinWait(10000000) End While Try Console.WriteLine("newThread going to sleep.") ' When newThread goes to sleep, it is immediately ' woken up by a ThreadInterruptedException. Thread.Sleep(Timeout.Infinite) Catch ex As ThreadInterruptedException Console.WriteLine("newThread cannot go to " & _ "sleep - interrupted by main thread.") End Try End Sub End Class
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
This type is thread safe.

