Thread.Interrupt-Methode
Unterbricht einen Thread, der sich im WaitSleepJoin-Threadzustand befindet.
Namespace: System.Threading
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Sub Interrupt
'Usage
Dim instance As Thread
instance.Interrupt
public void Interrupt ()
public:
void Interrupt ()
public void Interrupt ()
public function Interrupt ()
Ausnahmen
Ausnahmetyp | Bedingung |
---|---|
Der Aufrufer verfügt nicht über die erforderliche SecurityPermission. |
Hinweise
Wenn dieser Thread gegenwärtig nicht in einem Wartezustand, Ruhezustand oder Verknüpfungszustand blockiert ist, wird er bei Beginn des nächsten Blockierens unterbrochen.
ThreadInterruptedException wird im unterbrochenen Thread ausgelöst, jedoch erst, nachdem der Thread blockiert wurde. Wenn der Thread nie blockiert wird, wird die Ausnahme nicht ausgelöst. Daher kann der Thread möglicherweise ohne Unterbrechung abgeschlossen werden.
Beispiel
Das folgende Codebeispiel veranschaulicht das Verhalten eines ausgeführten Threads, wenn dieser unterbrochen und anschließend gesperrt 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
.NET Framework-Sicherheit
- SecurityPermissionAttribute für erweiterte Threadvorgänge. Zugeordnete Enumeration: SecurityPermissionFlag.ControlThread.
Plattformen
Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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
Siehe auch
Referenz
Thread-Klasse
Thread-Member
System.Threading-Namespace
ThreadState
Weitere Ressourcen
Anhalten und Fortsetzen von Threads
Zustände von verwalteten Threads