RegisteredWaitHandle.Unregister(WaitHandle) 메서드

정의

네임스페이스:

System.Threading

어셈블리:

System.Threading.ThreadPool.dll

Source:

RegisteredWaitHandle.Unix.cs

RegisterWaitForSingleObject(WaitHandle, WaitOrTimerCallback, Object, UInt32, Boolean) 메서드에서 발생한 등록된 대기 작업을 취소합니다.

public:
 bool Unregister(System::Threading::WaitHandle ^ waitObject);

public bool Unregister (System.Threading.WaitHandle? waitObject);

member this.Unregister : System.Threading.WaitHandle -> bool

Public Function Unregister (waitObject As WaitHandle) As Boolean

매개 변수

waitObject

WaitHandle

신호를 받을 WaitHandle입니다.

반환

Boolean

작업이 성공적으로 수행되면 true이고, 그렇지 않으면 false입니다.

예제

다음 예제에서는 메서드를 사용하여 대기 핸들이 Unregister 신호를 받았기 때문에 콜백이 발생한 경우 작업을 등록 취소하는 방법을 보여줍니다.

또한 이 예제에서는 지정된 대기 핸들에 RegisterWaitForSingleObject 신호를 보낼 때 메서드를 사용하여 지정된 콜백 메서드를 실행하는 방법도 보여줍니다. 이 예제에서 콜백 메서드는 이 WaitProc고 대기 핸들은 입니다 AutoResetEvent.

이 예제에서는 실행할 때 콜백에 전달되는 정보를 저장할 클래스를 정의 TaskInfo 합니다. 이 예제에서는 개체를 TaskInfo 만들고 일부 문자열 데이터를 할당합니다. RegisteredWaitHandle 메서드에서 반환 RegisterWaitForSingleObject 되는 은 콜백 메서드가 에 액세스할 수 RegisteredWaitHandle있도록 개체의 TaskInfo 필드에 할당됩니다Handle.

를 콜백 메서드에 전달할 개체로 지정하는 TaskInfo 것 외에도 메서드에 RegisterWaitForSingleObject 대한 호출은 태스크가 대기할, 콜백 메서드를 WaitOrTimerCallback 나타내는 WaitProc 대리자, 1초 시간 제한 간격 및 여러 콜백을 지정 AutoResetEvent 합니다.

주 스레드는 해당 Set 메서드를 호출하여 에 AutoResetEvent 신호를 보내면 대리자를 WaitOrTimerCallback 호출합니다. 메서드는 WaitProcRegisteredWaitHandle 시간 초과가 발생했는지 여부를 확인하기 위해 테스트합니다. 대기 핸들이 신호를 받았기 때문에 콜백이 호출된 경우 메서드는 WaitProc 를 등록 취소하고 RegisteredWaitHandle추가 콜백을 중지합니다. 시간 초과의 경우 작업은 계속 대기합니다. 메서드는 WaitProc 콘솔에 메시지를 인쇄하여 끝납니다.

using namespace System;
using namespace System::Threading;

// TaskInfo contains data that will be passed to the callback
// method.
public ref class TaskInfo
{
public:
   TaskInfo()
   {
      Handle = nullptr;
      OtherInfo = "default";
   }

   RegisteredWaitHandle^ Handle;
   String^ OtherInfo;
};

ref class Example
{
public:

   // The callback method executes when the registered wait times out,
   // or when the WaitHandle (in this case AutoResetEvent) is signaled.
   // WaitProc unregisters the WaitHandle the first time the event is 
   // signaled.
   static void WaitProc( Object^ state, bool timedOut )
   {
      
      // The state Object must be cast to the correct type, because the
      // signature of the WaitOrTimerCallback delegate specifies type
      // Object.
      TaskInfo^ ti = static_cast<TaskInfo^>(state);
      String^ cause = "TIMED OUT";
      if (  !timedOut )
      {
         cause = "SIGNALED";
         
         // If the callback method executes because the WaitHandle is
         // signaled, stop future execution of the callback method
         // by unregistering the WaitHandle.
         if ( ti->Handle != nullptr )
                  ti->Handle->Unregister( nullptr );
      }

      Console::WriteLine( "WaitProc( {0}) executes on thread {1}; cause = {2}.", ti->OtherInfo, Thread::CurrentThread->GetHashCode(), cause );
   }

};

int main()
{
   
   // The main thread uses AutoResetEvent to signal the
   // registered wait handle, which executes the callback
   // method.
   AutoResetEvent^ ev = gcnew AutoResetEvent( false );
   TaskInfo^ ti = gcnew TaskInfo;
   ti->OtherInfo = "First task";
   
   // The TaskInfo for the task includes the registered wait
   // handle returned by RegisterWaitForSingleObject.  This
   // allows the wait to be terminated when the object has
   // been signaled once (see WaitProc).
   ti->Handle = ThreadPool::RegisterWaitForSingleObject( ev, gcnew WaitOrTimerCallback( Example::WaitProc ), ti, 1000, false );
   
   // The main thread waits three seconds, to demonstrate the
   // time-outs on the queued thread, and then signals.
   Thread::Sleep( 3100 );
   Console::WriteLine( "Main thread signals." );
   ev->Set();
   
   // The main thread sleeps, which should give the callback
   // method time to execute.  If you comment out this line, the
   // program usually ends before the ThreadPool thread can execute.
   Thread::Sleep( 1000 );
   
   // If you start a thread yourself, you can wait for it to end
   // by calling Thread::Join.  This option is not available with 
   // thread pool threads.
   return 0;
}

using System;
using System.Threading;

// TaskInfo contains data that will be passed to the callback
// method.
public class TaskInfo {
    public RegisteredWaitHandle Handle = null;
    public string OtherInfo = "default";
}

public class Example {
    public static void Main(string[] args) {
        // The main thread uses AutoResetEvent to signal the
        // registered wait handle, which executes the callback
        // method.
        AutoResetEvent ev = new AutoResetEvent(false);

        TaskInfo ti = new TaskInfo();
        ti.OtherInfo = "First task";
        // The TaskInfo for the task includes the registered wait
        // handle returned by RegisterWaitForSingleObject.  This
        // allows the wait to be terminated when the object has
        // been signaled once (see WaitProc).
        ti.Handle = ThreadPool.RegisterWaitForSingleObject(
            ev,
            new WaitOrTimerCallback(WaitProc),
            ti,
            1000,
            false
        );

        // The main thread waits three seconds, to demonstrate the
        // time-outs on the queued thread, and then signals.
        Thread.Sleep(3100);
        Console.WriteLine("Main thread signals.");
        ev.Set();

        // The main thread sleeps, which should give the callback
        // method time to execute.  If you comment out this line, the
        // program usually ends before the ThreadPool thread can execute.
        Thread.Sleep(1000);
        // If you start a thread yourself, you can wait for it to end
        // by calling Thread.Join.  This option is not available with 
        // thread pool threads.
    }
   
    // The callback method executes when the registered wait times out,
    // or when the WaitHandle (in this case AutoResetEvent) is signaled.
    // WaitProc unregisters the WaitHandle the first time the event is 
    // signaled.
    public static void WaitProc(object state, bool timedOut) {
        // The state object must be cast to the correct type, because the
        // signature of the WaitOrTimerCallback delegate specifies type
        // Object.
        TaskInfo ti = (TaskInfo) state;

        string cause = "TIMED OUT";
        if (!timedOut) {
            cause = "SIGNALED";
            // If the callback method executes because the WaitHandle is
            // signaled, stop future execution of the callback method
            // by unregistering the WaitHandle.
            if (ti.Handle != null)
                ti.Handle.Unregister(null);
        } 

        Console.WriteLine("WaitProc( {0} ) executes on thread {1}; cause = {2}.",
            ti.OtherInfo, 
            Thread.CurrentThread.GetHashCode().ToString(), 
            cause
        );
    }
}

Imports System.Threading

' TaskInfo contains data that will be passed to the callback
' method.
Public Class TaskInfo
    public Handle As RegisteredWaitHandle = Nothing
    public OtherInfo As String = "default"
End Class

Public Class Example

    <MTAThread> _
    Public Shared Sub Main()
        ' The main thread uses AutoResetEvent to signal the
        ' registered wait handle, which executes the callback
        ' method.
        Dim ev As New AutoResetEvent(false)

        Dim ti As New TaskInfo()
        ti.OtherInfo = "First task"
        ' The TaskInfo for the task includes the registered wait
        ' handle returned by RegisterWaitForSingleObject.  This
        ' allows the wait to be terminated when the object has
        ' been signaled once (see WaitProc).
        ti.Handle = ThreadPool.RegisterWaitForSingleObject( _
            ev, _
            New WaitOrTimerCallback(AddressOf WaitProc), _
            ti, _
            1000, _
            false _
        )

        ' The main thread waits about three seconds, to demonstrate 
        ' the time-outs on the queued task, and then signals.
        Thread.Sleep(3100)
        Console.WriteLine("Main thread signals.")
        ev.Set()

        ' The main thread sleeps, which should give the callback
        ' method time to execute.  If you comment out this line, the
        ' program usually ends before the ThreadPool thread can execute.
        Thread.Sleep(1000)
        ' If you start a thread yourself, you can wait for it to end
        ' by calling Thread.Join.  This option is not available with 
        ' thread pool threads.
    End Sub
   
    ' The callback method executes when the registered wait times out,
    ' or when the WaitHandle (in this case AutoResetEvent) is signaled.
    ' WaitProc unregisters the WaitHandle the first time the event is 
    ' signaled.
    Public Shared Sub WaitProc(state As Object, timedOut As Boolean)
        ' The state object must be cast to the correct type, because the
        ' signature of the WaitOrTimerCallback delegate specifies type
        ' Object.
        Dim ti As TaskInfo = CType(state, TaskInfo)

        Dim cause As String = "TIMED OUT"
        If Not timedOut Then
            cause = "SIGNALED"
            ' If the callback method executes because the WaitHandle is
            ' signaled, stop future execution of the callback method
            ' by unregistering the WaitHandle.
            If Not ti.Handle Is Nothing Then
                ti.Handle.Unregister(Nothing)
            End If
        End If 

        Console.WriteLine("WaitProc( {0} ) executes on thread {1}; cause = {2}.", _
            ti.OtherInfo, _
            Thread.CurrentThread.GetHashCode().ToString(), _
            cause _
        )
    End Sub
End Class

설명

가 지정된 경우 waitObject 가 성공적으로 등록 취소된 경우에만 RegisteredWaitHandle 신호를 보냅니다. 실행할 waitObject 때 Unregister 콜백 메서드가 진행 중인 경우 콜백 메서드가 완료될 때까지 신호를 받지 않습니다. 특히 콜백 메서드가 를 실행하는 UnregisterwaitObject 경우 해당 콜백 메서드가 완료될 때까지 신호가 표시되지 않습니다.

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