Thread.SetData メソッド

[アーティクル]
03/28/2008

現在実行中のスレッド上にある指定されたスロット内のデータを、そのスレッドの現在のドメインに設定します。

Public Shared Sub SetData( _
   ByVal slot As LocalDataStoreSlot, _   ByVal data As Object _)
[C#]
public static void SetData(LocalDataStoreSlotslot,objectdata);
[C++]
public: static void SetData(LocalDataStoreSlot* slot,Object* data);
[JScript]
public static function SetData(
   slot : LocalDataStoreSlot,data : Object);

パラメータ

slot
値を設定する LocalDataStoreSlot 。
data
設定される値。

解説

スレッドは、ローカルストアメモリ機構を使用して、スレッド固有のデータを格納します。共通言語ランタイムは、各プロセスの作成時に、そのプロセスにマルチスロットのデータストア配列を割り当てます。スレッドは、データストアのデータスロットを割り当てたり、スロットにデータ値を格納および取得したり、スレッドの有効期限が切れた後でスロットを再利用できるようにスロットを解放したりできます。データスロットはスレッドごとに一意です。他のスレッドは (子スレッドであっても) そのデータを取得できません。

[Visual Basic] メモ SetData は、 Shared メソッドで、別のスレッドを参照する変数を使用して呼び出した場合でも、常に現在実行中のスレッドに対して適用されます。混乱を避けるため、 Shared メソッドを呼び出すときは、 Thread.SetData(testSlot, "test data") のように、クラス名を使用してください。

使用例

[Visual Basic, C#, C++] 名前付きデータスロットにスレッド固有の情報を格納する方法の例を次に示します。

 
Option Explicit
Option Strict

Imports System
Imports System.Threading

Class Test

    Shared Sub Main()
        Dim newThreads(3) As Thread
        For i As Integer = 0 To newThreads.Length - 1
            newThreads(i) = New Thread(AddressOf SlotExample.SlotTest)
            newThreads(i).Start()
        Next i
    End Sub
    
End Class

Public Class SlotExample

    Shared randomGenerator As Random = New Random()

    Shared Sub SlotTest()
    
        ' Set different data in each thread's data slot.
        Thread.SetData( _
            Thread.GetNamedDataSlot("Random"), _ 
            randomGenerator.Next(1, 200))

        ' Write the data from each thread's data slot.
        Console.WriteLine("Data in thread_{0}'s data slot: {1,3}", _
            AppDomain.GetCurrentThreadId().ToString(), _
            Thread.GetData( _
            Thread.GetNamedDataSlot("Random")).ToString())

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

        Console.WriteLine("Data in thread_{0}'s data slot is still: {1,3}", _
            AppDomain.GetCurrentThreadId().ToString(), _
            Thread.GetData( _
            Thread.GetNamedDataSlot("Random")).ToString())

        ' Allow time for other threads to show their data,
        ' then demonstrate that any code a thread executes
        ' has access to the thread's named data slot.        
        Thread.Sleep(1000)

        Dim o As New Other()
        o.ShowSlotData()
    End Sub
    
End Class

Public Class Other
    Public Sub ShowSlotData()
        ' This method has no access to the data in the SlotExample
        ' class, but when executed by a thread it can obtain
        ' the thread's data from a named slot.
        Console.WriteLine("Other code displays data in thread_{0}'s data slot: {1,3}", _
            AppDomain.GetCurrentThreadId().ToString(), _
            Thread.GetData( _
            Thread.GetNamedDataSlot("Random")).ToString())
    End Sub
End Class

[C#] 
using System;
using System.Threading;

class Test
{
    static void Main()
    {
        Thread[] newThreads = new Thread[4];
        for(int i = 0; i < newThreads.Length; i++)
        {
            newThreads[i] = 
                new Thread(new ThreadStart(Slot.SlotTest));
            newThreads[i].Start();
        }
    }
}

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

    public static void SlotTest()
    {
        // Set different data in each thread's data slot.
        Thread.SetData(
            Thread.GetNamedDataSlot("Random"), 
            randomGenerator.Next(1, 200));

        // Write the data from each thread's data slot.
        Console.WriteLine("Data in thread_{0}'s data slot: {1,3}", 
            AppDomain.GetCurrentThreadId().ToString(),
            Thread.GetData(
            Thread.GetNamedDataSlot("Random")).ToString());

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

        Console.WriteLine("Data in thread_{0}'s data slot is still: {1,3}", 
            AppDomain.GetCurrentThreadId().ToString(),
            Thread.GetData(
            Thread.GetNamedDataSlot("Random")).ToString());

        // Allow time for other threads to show their data,
        // then demonstrate that any code a thread executes
        // has access to the thread's named data slot.        
        Thread.Sleep(1000);

        Other o = new Other();
        o.ShowSlotData();
    }
}

public class Other
{
    public void ShowSlotData()
    {
        // This method has no access to the data in the Slot
        // class, but when executed by a thread it can obtain
        // the thread's data from a named slot.
        Console.WriteLine("Other code displays data in thread_{0}'s data slot: {1,3}", 
            AppDomain.GetCurrentThreadId().ToString(), 
            Thread.GetData( 
            Thread.GetNamedDataSlot("Random")).ToString());
    }
}

[C++] 
#using <mscorlib.dll>
using namespace System;
using namespace System::Threading;

__gc class Other
{
public:
    void ShowSlotData()
    {
        // This method has no access to the data in the Slot
        // class, but when executed by a thread it can obtain
        // the thread's data from a named slot.
        Console::WriteLine("Other code displays data in thread_{0}'s data slot: {1,3}", 
            __box(AppDomain::GetCurrentThreadId()), 
            Thread::GetData( 
            Thread::GetNamedDataSlot("Random"))->ToString());
    }
};

__gc class Slot
{
    static Random* randomGenerator = new Random();

public:
    static void SlotTest()
    {
        // Set different data in each thread's data slot.
        Thread::SetData(
            Thread::GetNamedDataSlot(S"Random"), 
            __box(randomGenerator->Next(1, 200)));

        // Write the data from each thread's data slot.
        Console::WriteLine(S"Data in thread_{0}'s data slot: {1,3}", 
            AppDomain::GetCurrentThreadId().ToString(),
            Thread::GetData(
            Thread::GetNamedDataSlot(S"Random"))->ToString());

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

        Console::WriteLine(S"Data in thread_{0}'s data slot is still: {1,3}", 
            AppDomain::GetCurrentThreadId().ToString(),
            Thread::GetData(
            Thread::GetNamedDataSlot(S"Random"))->ToString());

        // Allow time for other threads to show their data,
        // then demonstrate that any code a thread executes
        // has access to the thread's named data slot.        
        Thread::Sleep(1000);

        Other* o = new Other();
        o->ShowSlotData();
    }
};

void main()
{
    Thread* newThreads __gc[] = new Thread* __gc[4];
    for(int i = 0; i < newThreads->Length; i++)
    {
        newThreads[i] = new Thread(
            new ThreadStart(0, &Slot::SlotTest));
        newThreads[i]->Start();
    }
}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタボタンをクリックします。

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, .NET Compact Framework - Windows CE .NET

参照

次の方法で共有

Thread.SetData メソッド

パラメータ

解説

使用例

必要条件

参照

その他のリソース