Thread.SetData(LocalDataStoreSlot, Object) Método

Definición

Establece los datos de la ranura especificada en el subproceso actualmente en ejecución, para el dominio actual de dicho subproceso.Sets the data in the specified slot on the currently running thread, for that thread's current domain. Para obtener un mejor rendimiento, utilice en su lugar los campos marcados con el atributo ThreadStaticAttribute.For better performance, use fields marked with the ThreadStaticAttribute attribute instead.

public:
 static void SetData(LocalDataStoreSlot ^ slot, System::Object ^ data);
public static void SetData (LocalDataStoreSlot slot, object data);
static member SetData : LocalDataStoreSlot * obj -> unit
Public Shared Sub SetData (slot As LocalDataStoreSlot, data As Object)

Parámetros

slot
LocalDataStoreSlot

La LocalDataStoreSlot donde se va a establecer el valor.The LocalDataStoreSlot in which to set the value.

data
Object

Valor que se va a establecer.The value to be set.

Ejemplos

Esta sección contiene dos ejemplos de código.This section contains two code examples. En el primer ejemplo se muestra cómo utilizar un campo que está marcado con el atributo ThreadStaticAttribute para almacenar información específica del subproceso.The first example shows how to use a field that is marked with the ThreadStaticAttribute attribute to hold thread-specific information. En el segundo ejemplo se muestra cómo usar una ranura de datos para hacer lo mismo.The second example shows how to use a data slot to do the same thing.

Primer ejemploFirst Example

En el ejemplo siguiente se muestra cómo usar un campo marcado con ThreadStaticAttribute para almacenar información específica del subproceso.The following example shows how to use a field that is marked with ThreadStaticAttribute to hold thread-specific information. Esta técnica proporciona un mejor rendimiento que la técnica que se muestra en el segundo ejemplo.This technique provides better performance than the technique that is shown in the second example.

using namespace System;
using namespace System::Threading;

ref class ThreadData
{
private:
   [ThreadStatic]
   static int threadSpecificData;

public:
   static void ThreadStaticDemo()
   {
      // Store the managed thread id for each thread in the static
      // variable.
      threadSpecificData = Thread::CurrentThread->ManagedThreadId;
      
      // Allow other threads time to execute the same code, to show
      // that the static data is unique to each thread.
      Thread::Sleep( 1000 );

      // Display the static data.
      Console::WriteLine( "Data for managed thread {0}: {1}", 
         Thread::CurrentThread->ManagedThreadId, threadSpecificData );
   }
};

int main()
{
   for ( int i = 0; i < 3; i++ )
   {
      Thread^ newThread = 
          gcnew Thread( gcnew ThreadStart( ThreadData::ThreadStaticDemo )); 
      newThread->Start();
   }
}

/* This code example produces output similar to the following:

Data for managed thread 4: 4
Data for managed thread 5: 5
Data for managed thread 3: 3
 */
using System;
using System.Threading;

class Test
{
    static void Main()
    {
        for(int i = 0; i < 3; i++)
        {
            Thread newThread = new Thread(ThreadData.ThreadStaticDemo);
            newThread.Start();
        }
    }
}

class ThreadData
{
    [ThreadStatic]
    static int threadSpecificData;

    public static void ThreadStaticDemo()
    {
        // Store the managed thread id for each thread in the static
        // variable.
        threadSpecificData = Thread.CurrentThread.ManagedThreadId;
      
        // Allow other threads time to execute the same code, to show
        // that the static data is unique to each thread.
        Thread.Sleep( 1000 );

        // Display the static data.
        Console.WriteLine( "Data for managed thread {0}: {1}", 
            Thread.CurrentThread.ManagedThreadId, threadSpecificData );
    }
}

/* This code example produces output similar to the following:

Data for managed thread 4: 4
Data for managed thread 5: 5
Data for managed thread 3: 3
 */
Imports System.Threading

Class Test

    <MTAThread> _
    Shared Sub Main()

        For i As Integer = 1 To 3
            Dim newThread As New Thread(AddressOf ThreadData.ThreadStaticDemo)
            newThread.Start()
        Next i

    End Sub

End Class

Class ThreadData

    <ThreadStatic> _
    Shared threadSpecificData As Integer

    Shared Sub ThreadStaticDemo()

        ' Store the managed thread id for each thread in the static
        ' variable.
        threadSpecificData = Thread.CurrentThread.ManagedThreadId
      
        ' Allow other threads time to execute the same code, to show
        ' that the static data is unique to each thread.
        Thread.Sleep( 1000 )

        ' Display the static data.
        Console.WriteLine( "Data for managed thread {0}: {1}", _
            Thread.CurrentThread.ManagedThreadId, threadSpecificData )

    End Sub

End Class

' This code example produces output similar to the following:
'
'Data for managed thread 4: 4
'Data for managed thread 5: 5
'Data for managed thread 3: 3

Segundo ejemploSecond Example

En el ejemplo siguiente se muestra cómo usar una ranura de datos con nombre para almacenar información específica del subproceso.The following example demonstrates how to use a named data slot to store thread-specific information.

using namespace System;
using namespace System::Threading;

ref class Slot
{
private:
    static Random^ randomGenerator = gcnew Random();

public:
    static void SlotTest()
    {
        // Set random data in each thread's data slot.
        int slotData = randomGenerator->Next(1, 200);
        int threadId = Thread::CurrentThread->ManagedThreadId;

        Thread::SetData(
            Thread::GetNamedDataSlot("Random"),
            slotData);

        // Show what was saved in the thread's data slot.
        Console::WriteLine("Data stored in thread_{0}'s data slot: {1,3}",
            threadId, slotData);

        // Allow other threads time to execute SetData to show
        // that a thread's data slot is unique to itself.
        Thread::Sleep(1000);

        int newSlotData =
            (int)Thread::GetData(Thread::GetNamedDataSlot("Random"));

        if (newSlotData == slotData)
        {
            Console::WriteLine("Data in thread_{0}'s data slot is still: {1,3}",
                threadId, newSlotData);
        }
        else
        {
            Console::WriteLine("Data in thread_{0}'s data slot changed to: {1,3}",
                threadId, newSlotData);
        }
    }
};

ref class Test
{
public:
    static void Main()
    {
        array<Thread^>^ newThreads = gcnew array<Thread^>(4);
        int i;
        for (i = 0; i < newThreads->Length; i++)
        {
            newThreads[i] =
                gcnew Thread(gcnew ThreadStart(&Slot::SlotTest));
            newThreads[i]->Start();
        }
        Thread::Sleep(2000);
        for (i = 0; i < newThreads->Length; i++)
        {
            newThreads[i]->Join();
            Console::WriteLine("Thread_{0} finished.",
                newThreads[i]->ManagedThreadId);
        }
    }
};

int main()
{
    Test::Main();
}
using System;
using System.Threading;

class Test
{
    public static void Main()
    {
        Thread[] newThreads = new Thread[4];
        int i;
        for (i = 0; i < newThreads.Length; i++)
        {
            newThreads[i] =
                new Thread(new ThreadStart(Slot.SlotTest));
            newThreads[i].Start();
        }
        Thread.Sleep(2000);
        for (i = 0; i < newThreads.Length; i++)
        {
            newThreads[i].Join();
            Console.WriteLine("Thread_{0} finished.",
                newThreads[i].ManagedThreadId);
        }
    }
}

class Slot
{
    private static Random randomGenerator = new Random();

    public static void SlotTest()
    {
        // Set random data in each thread's data slot.
        int slotData = randomGenerator.Next(1, 200);
        int threadId = Thread.CurrentThread.ManagedThreadId;

        Thread.SetData(
            Thread.GetNamedDataSlot("Random"),
            slotData);

        // Show what was saved in the thread's data slot.
        Console.WriteLine("Data stored in thread_{0}'s data slot: {1,3}",
            threadId, slotData);

        // Allow other threads time to execute SetData to show
        // that a thread's data slot is unique to itself.
        Thread.Sleep(1000);

        int newSlotData =
            (int)Thread.GetData(Thread.GetNamedDataSlot("Random"));

        if (newSlotData == slotData)
        {
            Console.WriteLine("Data in thread_{0}'s data slot is still: {1,3}",
                threadId, newSlotData);
        }
        else
        {
            Console.WriteLine("Data in thread_{0}'s data slot changed to: {1,3}",
                threadId, newSlotData);
        }
    }
}
Imports System.Threading

Class Test
    Public Shared Sub Main()
        Dim newThreads(3) As Thread
        Dim i As Integer
        For i = 0 To newThreads.Length - 1
            newThreads(i) = _
                New Thread(New ThreadStart(AddressOf Slot.SlotTest))
            newThreads(i).Start()
        Next i
        Thread.Sleep(2000)
        For i = 0 To newThreads.Length - 1
            newThreads(i).Join()
            Console.WriteLine("Thread_{0} finished.", _
                newThreads(i).ManagedThreadId)
        Next i
    End Sub
End Class

Class Slot
    Private Shared randomGenerator As New Random()

    Public Shared Sub SlotTest()
        ' Set random data in each thread's data slot.
        Dim slotData As Integer = randomGenerator.Next(1, 200)
        Dim threadId As Integer = Thread.CurrentThread.ManagedThreadId

        Thread.SetData(
            Thread.GetNamedDataSlot("Random"),
            slotData)

        ' Show what was saved in the thread's data slot.
        Console.WriteLine("Data stored in thread_{0}'s data slot: {1,3}",
            threadId, slotData)

        ' Allow other threads time to execute SetData to show
        ' that a thread's data slot is unique to itself.
        Thread.Sleep(1000)

        Dim newSlotData As Integer = _
            CType(Thread.GetData(Thread.GetNamedDataSlot("Random")), Integer)

        If newSlotData = slotData Then
            Console.WriteLine("Data in thread_{0}'s data slot is still: {1,3}",
                threadId, newSlotData)
        Else
            Console.WriteLine("Data in thread_{0}'s data slot changed to: {1,3}",
                threadId, newSlotData)
        End If
    End Sub
End Class

Comentarios

Importante

El .NET Framework proporciona dos mecanismos para usar el almacenamiento local de subprocesos (TLS): campos estáticos relacionados con subprocesos (es decir, campos marcados con el atributo ThreadStaticAttribute) y ranuras de datos.The .NET Framework provides two mechanisms for using thread local storage (TLS): thread-relative static fields (that is, fields that are marked with the ThreadStaticAttribute attribute) and data slots. Los campos estáticos relacionados con subprocesos proporcionan un rendimiento mucho mejor que las ranuras de datos y habilitan la comprobación de tipos en tiempo de compilación.Thread-relative static fields provide much better performance than data slots, and enable compile-time type checking. Para obtener más información sobre el uso de TLS, vea Thread almacenamiento local: Los campos estáticos relacionados con subprocesos y las ranuras de datos.For more information about using TLS, see Thread Local Storage: Thread-Relative Static Fields and Data Slots.

Los subprocesos usan un mecanismo de memoria del almacén local para almacenar datos específicos del subproceso.Threads use a local store memory mechanism to store thread-specific data. El Common Language Runtime asigna una matriz de almacén de datos de varias ranuras a cada proceso cuando se crea.The common language runtime allocates a multi-slot data store array to each process when it is created. El subproceso puede asignar una ranura de datos en el almacén de datos, almacenar y recuperar un valor de datos en la ranura y liberar la ranura para su reutilización una vez finalizado el procedimiento del subproceso y la recolección de elementos no utilizados reclama el objeto Thread.The thread can allocate a data slot in the data store, store and retrieve a data value in the slot, and free the slot for reuse after the thread procedure ends and the Thread object has been reclaimed by garbage collection. Las ranuras de datos son únicas por subproceso.Data slots are unique per thread. Ningún otro subproceso (ni siquiera un subproceso secundario) puede obtener esos datos.No other thread (not even a child thread) can get that data.

Nota

SetData es un método Shared que siempre se aplica al subproceso que se está ejecutando actualmente, aunque se llame mediante una variable que haga referencia a otro subproceso.SetData is a Shared method that always applies to the currently executing thread, even if you call it using a variable that refers to another thread. Para evitar confusiones, use el nombre de clase cuando llame a métodos Shared: Thread.SetData(testSlot, "test data").To avoid confusion, use the class name when calling Shared methods: Thread.SetData(testSlot, "test data").

Se aplica a

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