GC.WaitForPendingFinalizers GC.WaitForPendingFinalizers GC.WaitForPendingFinalizers GC.WaitForPendingFinalizers Method

Définition

Suspend le thread actif jusqu'à ce que le thread traitant la file d'attente des finaliseurs ait vidé cette file d'attente.Suspends the current thread until the thread that is processing the queue of finalizers has emptied that queue.

public:
 static void WaitForPendingFinalizers();
public static void WaitForPendingFinalizers ();
static member WaitForPendingFinalizers : unit -> unit
Public Shared Sub WaitForPendingFinalizers ()

Exemples

L’exemple suivant montre comment utiliser la WaitForPendingFinalizers méthode pour suspendre le thread actuel jusqu’à ce que la finalisation de tous les objets collectés soit terminée.The following example demonstrates how to use the WaitForPendingFinalizers method to suspend the current thread until finalization of all the collected objects is complete.

using namespace System;
ref class MyFinalizeObject
{
private:

   // Make this number very large to cause the finalizer to
   // do more work.
   literal int maxIterations = 10000;
   ~MyFinalizeObject()
   {
      Console::WriteLine( "Finalizing a MyFinalizeObject" );
      
      // Do some work.
      for ( int i = 0; i < maxIterations; i++ )
      {
         
         // This method performs no operation on i, but prevents
         // the JIT compiler from optimizing away the code inside
         // the loop.
         GC::KeepAlive( i );

      }
   }

};


// You can increase this number to fill up more memory.
const int numMfos = 1000;

// You can increase this number to cause more
// post-finalization work to be done.
const int maxIterations = 100;
int main()
{
   MyFinalizeObject^ mfo = nullptr;
   
   // Create and release a large number of objects
   // that require finalization.
   for ( int j = 0; j < numMfos; j++ )
   {
      mfo = gcnew MyFinalizeObject;

   }
   
   //Release the last object created in the loop.
   mfo = nullptr;
   
   //Force garbage collection.
   GC::Collect();
   
   // Wait for all finalizers to complete before continuing.
   // Without this call to GC::WaitForPendingFinalizers,
   // the worker loop below might execute at the same time
   // as the finalizers.
   // With this call, the worker loop executes only after
   // all finalizers have been called.
   GC::WaitForPendingFinalizers();
   
   // Worker loop to perform post-finalization code.
   for ( int i = 0; i < maxIterations; i++ )
   {
      Console::WriteLine( "Doing some post-finalize work" );

   }
}

using System;

namespace WaitForPendingFinalizersExample
{
   class MyWaitForPendingFinalizersClass
   {
	// You can increase this number to fill up more memory.
	const int numMfos = 1000;
	// You can increase this number to cause more
	// post-finalization work to be done.
	const int maxIterations = 100;

	static void Main(string[] args)
	{
	   MyFinalizeObject mfo = null;
         
	   // Create and release a large number of objects
	   // that require finalization.
	   for(int j = 0; j < numMfos; j++)
	   {
	      mfo = new MyFinalizeObject();
	   }
         
	   //Release the last object created in the loop.
	   mfo = null;

	   //Force garbage collection.
	   GC.Collect();
         
	   // Wait for all finalizers to complete before continuing.
	   // Without this call to GC.WaitForPendingFinalizers, 
	   // the worker loop below might execute at the same time 
	   // as the finalizers.
	   // With this call, the worker loop executes only after
	   // all finalizers have been called.
	   GC.WaitForPendingFinalizers();

	   // Worker loop to perform post-finalization code.
	   for(int i = 0; i < maxIterations; i++)
	   {
	      Console.WriteLine("Doing some post-finalize work");
	   }
	}
   }

   class MyFinalizeObject
   {
	// Make this number very large to cause the finalizer to
	// do more work.
	private const int maxIterations = 10000;
      
	~MyFinalizeObject()
	{
	   Console.WriteLine("Finalizing a MyFinalizeObject");
			
	   // Do some work.
	   for(int i = 0; i < maxIterations; i++)
	   {
	      // This method performs no operation on i, but prevents 
	      // the JIT compiler from optimizing away the code inside 
	      // the loop.
	      GC.KeepAlive(i);
	   }
        }
    }
}
Imports System

Namespace WaitForPendingFinalizersExample
   Class MyWaitForPendingFinalizersClass
  
    ' You can increase this number to fill up more memory.
      Private Const numMfos As Integer = 1000
      ' You can increase this number to cause more
      ' post-finalization work to be done.
      Private Const maxIterations As Integer = 100
     
      Overloads Shared Sub Main()
         Dim mfo As MyFinalizeObject = Nothing
      
         ' Create and release a large number of objects
         ' that require finalization.
         Dim j As Integer
         For j = 0 To numMfos - 1
            mfo = New MyFinalizeObject()
         Next j
      
         'Release the last object created in the loop.
         mfo = Nothing
      
         'Force garbage collection.
         GC.Collect()
      
         ' Wait for all finalizers to complete before continuing.
         ' Without this call to GC.WaitForPendingFinalizers, 
         ' the worker loop below might execute at the same time 
         ' as the finalizers.
         ' With this call, the worker loop executes only after
         ' all finalizers have been called.
         GC.WaitForPendingFinalizers()
      
         ' Worker loop to perform post-finalization code.
         Dim i As Integer
         For i = 0 To maxIterations - 1
            Console.WriteLine("Doing some post-finalize work")
         Next i
      End Sub
   End Class


   Class MyFinalizeObject
      ' Make this number very large to cause the finalizer to
      ' do more work.
      Private maxIterations As Integer = 10000
      
      Protected Overrides Sub Finalize()
         Console.WriteLine("Finalizing a MyFinalizeObject")
      
         ' Do some work.
         Dim i As Integer
         For i = 0 To maxIterations - 1
            ' This method performs no operation on i, but prevents 
            ' the JIT compiler from optimizing away the code inside 
            ' the loop.
            GC.KeepAlive(i)
         Next i
         MyBase.Finalize()
      End Sub
   End Class
End Namespace

Remarques

Lorsque le garbage collector détecte des objets qui peuvent être récupérés, il vérifie chaque objet pour déterminer les exigences de finalisation de l’objet.When the garbage collector finds objects that can be reclaimed, it checks each object to determine the object's finalization requirements. Si un objet implémente un finaliseur et n’a pas désactivé la finalisation SuppressFinalizeen appelant, l’objet est placé dans une liste d’objets marqués comme prêts pour la finalisation.If an object implements a finalizer and has not disabled finalization by calling SuppressFinalize, the object is placed in a list of objects that are marked as ready for finalization. Le garbage collector appelle les Finalize méthodes pour les objets de cette liste et supprime les entrées de la liste.The garbage collector calls the Finalize methods for the objects in this list and removes the entries from the list. Cette méthode bloque jusqu’à ce que tous les finaliseurs aient été exécutés jusqu’à leur achèvement.This method blocks until all finalizers have run to completion.

Le thread sur lequel les finaliseurs sont exécutés n’est pas spécifié, de sorte qu’il n’y a aucune garantie que cette méthode se termine.The thread on which finalizers are run is unspecified, so there is no guarantee that this method will terminate. Toutefois, ce thread peut être interrompu par un autre thread pendant WaitForPendingFinalizers que la méthode est en cours.However, this thread can be interrupted by another thread while the WaitForPendingFinalizers method is in progress. Par exemple, vous pouvez démarrer un autre thread qui attend pendant un certain temps, puis interrompt ce thread si ce thread est toujours suspendu.For example, you can start another thread that waits for a period of time and then interrupts this thread if this thread is still suspended.

S’applique à