Timeout-Klasse
Enthält eine Konstante, mit der eine unbegrenzte Zeitspanne angegeben wird. Diese Klasse kann nicht vererbt werden.
Namespace: System.Threading
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<ComVisibleAttribute(True)> _
Public NotInheritable Class Timeout
'Usage
Auf die Member einer statischen Klassen wird direkt ohne Instanz der Klasse zugegriffen.
[ComVisibleAttribute(true)]
public static class Timeout
[ComVisibleAttribute(true)]
public ref class Timeout abstract sealed
/** @attribute ComVisibleAttribute(true) */
public final class Timeout
ComVisibleAttribute(true)
public final class Timeout
Hinweise
Der einzige Member dieser Klasse, Infinite, ist eine Konstante, die von Methoden verwendet wird, die einen ganzzahligen timeout-Parameter akzeptieren, z. B. Thread.Sleep(Int32), Thread.Join(Int32) und ReaderWriterLock.AcquireReaderLock(Int32).
Beispiel
Im folgenden Codebeispiel wird veranschaulicht, wie ein Thread für unbestimmte Zeit in den Ruhezustand versetzt und anschließend reaktiviert wird.
Option Explicit
Option Strict
Imports System
Imports System.Security.Permissions
Imports System.Threading
<Assembly: SecurityPermissionAttribute(SecurityAction.RequestMinimum, _
ControlThread := True)>
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
using System;
using System.Security.Permissions;
using System.Threading;
[assembly: SecurityPermissionAttribute(SecurityAction.RequestMinimum,
ControlThread = true)]
class ThreadInterrupt
{
static void Main()
{
StayAwake stayAwake = new StayAwake();
Thread newThread =
new Thread(new ThreadStart(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();
}
}
class StayAwake
{
bool sleepSwitch = false;
public bool SleepSwitch
{
set{ sleepSwitch = value; }
}
public StayAwake(){}
public void ThreadMethod()
{
Console.WriteLine("newThread is executing ThreadMethod.");
while(!sleepSwitch)
{
// Use SpinWait instead of Sleep to demonstrate the
// effect of calling Interrupt on a running thread.
Thread.SpinWait(10000000);
}
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(ThreadInterruptedException e)
{
Console.WriteLine("newThread cannot go to sleep - " +
"interrupted by main thread.");
}
}
}
using namespace System;
using namespace System::Security::Permissions;
using namespace System::Threading;
[assembly:SecurityPermissionAttribute(SecurityAction::RequestMinimum,
ControlThread=true)];
ref class StayAwake
{
private:
bool sleepSwitch;
public:
property bool SleepSwitch
{
void set( bool value )
{
sleepSwitch = value;
}
}
StayAwake()
{
sleepSwitch = false;
}
void ThreadMethod()
{
Console::WriteLine( "newThread is executing ThreadMethod." );
while ( !sleepSwitch )
{
// Use SpinWait instead of Sleep to demonstrate the
// effect of calling Interrupt on a running thread.
Thread::SpinWait( 10000000 );
}
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 ( ThreadInterruptedException^ /*e*/ )
{
Console::WriteLine( "newThread cannot go to sleep - "
"interrupted by main thread." );
}
}
};
int main()
{
StayAwake^ stayAwake = gcnew StayAwake;
Thread^ newThread = gcnew Thread( gcnew ThreadStart( stayAwake, &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." );
// Then tell newThread to go to sleep.
stayAwake->SleepSwitch = true;
// Wait for newThread to end.
newThread->Join();
}
import System.*;
import System.Security.Permissions.*;
import System.Threading.*;
import System.Threading.Thread;
/** @assembly SecurityPermissionAttribute(SecurityAction.RequestMinimum,
ControlThread = true)
*/
class ThreadInterrupt
{
public static void main(String[] args)
{
StayAwake stayAwake = new StayAwake();
Thread newThread = new Thread(new ThreadStart(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.set_SleepSwitch(true);
// Wait for newThread to end.
newThread.Join();
} //main
} //ThredInterrupt
class StayAwake
{
private boolean sleepSwitch = false;
/** @property
*/
public void set_SleepSwitch(boolean value)
{
sleepSwitch = value;
} //set_SleepSwitch
public StayAwake()
{
} //StayAwake
public void ThreadMethod()
{
Console.WriteLine("newThread is executing ThreadMethod.");
while (!(sleepSwitch)) {
// Use SpinWait instead of Sleep to demonstrate the
// effect of calling Interrupt on a running thread.
Thread.SpinWait(10000000);
}
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 (ThreadInterruptedException e) {
Console.WriteLine(("newThread cannot go to sleep - "
+ "nterrupted by main thread."));
}
} //ThreadMethod
} //StayAwake
Vererbungshierarchie
System.Object
System.Threading.Timeout
Threadsicherheit
Dieser Typ ist bezüglich Multithreadoperationen sicher.
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0, 1.0
Siehe auch
Referenz
Timeout-Member
System.Threading-Namespace
Thread-Klasse