GCNotificationStatus Enumerazione

Definizione

Spazio dei nomi:

System

Assembly:

System.Runtime.dll

Assembly:

mscorlib.dll

Assembly:

netstandard.dll

Fornisce informazioni sulla registrazione corrente per la notifica della successiva Garbage Collection completa.

public enum class GCNotificationStatus

public enum GCNotificationStatus

[System.Serializable]
public enum GCNotificationStatus

type GCNotificationStatus = 

[<System.Serializable>]
type GCNotificationStatus = 

Public Enum GCNotificationStatus

Ereditarietà

Object

ValueType

Enum

GCNotificationStatus

Attributi

SerializableAttribute

Campi

Canceled	2	La registrazione corrente è stata annullata dall'utente.
Failed	1	La notifica non è riuscita per un motivo qualsiasi.
NotApplicable	4	Questo valore può risultare quando non è presente alcuna registrazione corrente per una notifica di Garbage Collection o è stato eseguito un GC completo, ma è stato eseguito come GC in background, ovvero un GC che viene eseguito principalmente contemporaneamente ai thread utente, anziché un GC di blocco completo. La GC in background è abilitata per impostazione predefinita; disabilitando migliora l'accuratezza della stima, ma comporta pause GC più grandi.
Succeeded	0	La notifica è riuscita e la registrazione non è stata annullata.
Timeout	3	Il tempo specificato dal parametro millisecondsTimeout per WaitForFullGCApproach(Int32) o WaitForFullGCComplete(Int32) è trascorso.

Esempio

Nell'esempio seguente viene ottenuta un'enumerazione GCNotificationStatusWaitForFullGCApproach dal metodo . Se l'enumerazione restituisce Successed, chiama il metodo OnFullGCApproachNotify personalizzato per eseguire azioni in risposta all'approccio di Garbage Collection completo. Questo esempio di codice fa parte di un esempio più ampio fornito per l'argomento Notifiche di Garbage Collection .

public:
    static void WaitForFullGCProc()
    {
        while (true)
        {
            // CheckForNotify is set to true and false in Main.
            while (checkForNotify)
            {
                // Check for a notification of an approaching collection.
                GCNotificationStatus s = GC::WaitForFullGCApproach();
                if (s == GCNotificationStatus::Succeeded)
                {
                    Console::WriteLine("GC Notifiction raised.");
                    OnFullGCApproachNotify();
                }
                else if (s == GCNotificationStatus::Canceled)
                {
                    Console::WriteLine("GC Notification cancelled.");
                    break;
                }
                else
                {
                    // This can occur if a timeout period
                    // is specified for WaitForFullGCApproach(Timeout)
                    // or WaitForFullGCComplete(Timeout)
                    // and the time out period has elapsed.
                    Console::WriteLine("GC Notification not applicable.");
                    break;
                }

                // Check for a notification of a completed collection.
                s = GC::WaitForFullGCComplete();
                if (s == GCNotificationStatus::Succeeded)
                {
                    Console::WriteLine("GC Notification raised.");
                    OnFullGCCompleteEndNotify();
                }
                else if (s == GCNotificationStatus::Canceled)
                {
                    Console::WriteLine("GC Notification cancelled.");
                    break;
                }
                else
                {
                    // Could be a time out.
                    Console::WriteLine("GC Notification not applicable.");
                    break;
                }
            }


            Thread::Sleep(500);
            // FinalExit is set to true right before
            // the main thread cancelled notification.
            if (finalExit)
            {
                break;
            }
        }
    }

public static void WaitForFullGCProc()
{
    while (true)
    {
        // CheckForNotify is set to true and false in Main.
        while (checkForNotify)
        {
            // Check for a notification of an approaching collection.
            GCNotificationStatus s = GC.WaitForFullGCApproach();
            if (s == GCNotificationStatus.Succeeded)
            {
                Console.WriteLine("GC Notification raised.");
                OnFullGCApproachNotify();
            }
            else if (s == GCNotificationStatus.Canceled)
            {
                Console.WriteLine("GC Notification cancelled.");
                break;
            }
            else
            {
                // This can occur if a timeout period
                // is specified for WaitForFullGCApproach(Timeout)
                // or WaitForFullGCComplete(Timeout)
                // and the time out period has elapsed.
                Console.WriteLine("GC Notification not applicable.");
                break;
            }

            // Check for a notification of a completed collection.
            GCNotificationStatus status = GC.WaitForFullGCComplete();
            if (status == GCNotificationStatus.Succeeded)
            {
                Console.WriteLine("GC Notification raised.");
                OnFullGCCompleteEndNotify();
            }
            else if (status == GCNotificationStatus.Canceled)
            {
                Console.WriteLine("GC Notification cancelled.");
                break;
            }
            else
            {
                // Could be a time out.
                Console.WriteLine("GC Notification not applicable.");
                break;
            }
        }

        Thread.Sleep(500);
        // FinalExit is set to true right before
        // the main thread cancelled notification.
        if (finalExit)
        {
            break;
        }
    }
}

let waitForFullGCProc () =
    let mutable broken = false

    while not broken do
        let mutable broken = false
        // CheckForNotify is set to true and false in Main.
        while checkForNotify && not broken do
            // Check for a notification of an approaching collection.
            match GC.WaitForFullGCApproach() with
            | GCNotificationStatus.Succeeded ->
                printfn "GC Notification raised."
                onFullGCApproachNotify ()
                // Check for a notification of a completed collection.
                match GC.WaitForFullGCComplete() with
                | GCNotificationStatus.Succeeded ->
                    printfn "GC Notification raised."
                    onFullGCCompleteEndNotify ()
                | GCNotificationStatus.Canceled ->
                    printfn "GC Notification cancelled."
                    broken <- true
                | _ ->
                    // Could be a time out.
                    printfn "GC Notification not applicable."
                    broken <- true
            | GCNotificationStatus.Canceled ->
                printfn "GC Notification cancelled."
                broken <- true
            | _ ->
                // This can occur if a timeout period
                // is specified for WaitForFullGCApproach(Timeout)
                // or WaitForFullGCComplete(Timeout)
                // and the time out period has elapsed.
                printfn "GC Notification not applicable."
                broken <- true

        Thread.Sleep 500
        // FinalExit is set to true right before
        // the main thread cancelled notification.
        if finalExit then broken <- true

Public Shared Sub WaitForFullGCProc()

    While True
        ' CheckForNotify is set to true and false in Main.

        While checkForNotify
            ' Check for a notification of an approaching collection.
            Dim s As GCNotificationStatus = GC.WaitForFullGCApproach
            If (s = GCNotificationStatus.Succeeded) Then
                Console.WriteLine("GC Notification raised.")
                OnFullGCApproachNotify()
            ElseIf (s = GCNotificationStatus.Canceled) Then
                Console.WriteLine("GC Notification cancelled.")
                Exit While
            Else
                ' This can occur if a timeout period
                ' is specified for WaitForFullGCApproach(Timeout) 
                ' or WaitForFullGCComplete(Timeout)  
                ' and the time out period has elapsed. 
                Console.WriteLine("GC Notification not applicable.")
                Exit While
            End If

            ' Check for a notification of a completed collection.
            s = GC.WaitForFullGCComplete
            If (s = GCNotificationStatus.Succeeded) Then
                Console.WriteLine("GC Notifiction raised.")
                OnFullGCCompleteEndNotify()
            ElseIf (s = GCNotificationStatus.Canceled) Then
                Console.WriteLine("GC Notification cancelled.")
                Exit While
            Else
                ' Could be a time out.
                Console.WriteLine("GC Notification not applicable.")
                Exit While
            End If

        End While
        Thread.Sleep(500)
        ' FinalExit is set to true right before  
        ' the main thread cancelled notification.
        If finalExit Then
            Exit While
        End If

    End While
End Sub

Commenti

Usare il metodo per eseguire la RegisterForFullGCNotification registrazione per una notifica di Garbage Collection completa. Usare quindi il metodo o il WaitForFullGCApproachWaitForFullGCComplete metodo per restituire un'enumerazione GCNotificationStatus contenente lo stato della notifica.

Vedi anche

• Notifiche di Garbage Collection