Thread クラス
スレッドを作成および制御し、そのスレッドの優先順位の設定およびステータスの取得を行います。
名前空間: System.Threading
アセンブリ: mscorlib (mscorlib.dll 内)
構文
解説
使用例
継承階層
スレッド セーフ
プラットフォーム
バージョン情報
参照
アセンブリ: mscorlib (mscorlib.dll 内)
構文<ComVisibleAttribute(True)> _ <ClassInterfaceAttribute(ClassInterfaceType.None)> _ Public NotInheritable Class Thread Inherits CriticalFinalizerObject Implements _Thread
[ComVisibleAttribute(true)] [ClassInterfaceAttribute(ClassInterfaceType.None)] public sealed class Thread : CriticalFinalizerObject, _Thread
[ComVisibleAttribute(true)] [ClassInterfaceAttribute(ClassInterfaceType::None)] public ref class Thread sealed : public CriticalFinalizerObject, _Thread
解説プロセスは、そのプロセスに関連付けられたプログラム コードの一部を実行する 1 つ以上のスレッドを作成できます。スレッドで実行するプログラム コードを指定するには、ThreadStart デリゲートまたは ParameterizedThreadStart デリゲートを使用します。ParameterizedThreadStart デリゲートを使用すると、スレッド プロシージャにデータを渡すことができます。
スレッドは、存在している間は常に、ThreadState で 1 つ以上定義した状態を保ちます。スレッドに対しては、ThreadPriority で定義したスケジューリング優先順位を要求できますが、その優先順位がオペレーティング システムで有効であるかどうかは保証されません。
GetHashCode を使用すると、マネージ スレッドの識別子の値を取得できます。スレッドの有効期間の間は、この値の取得元のアプリケーション ドメインに関係なく、他のスレッドの値と衝突することはありません。
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| オペレーティング システムの ThreadId は、マネージ スレッドとの固定的な関係を一切持ちません。アンマネージ ホストは、マネージ スレッドとアンマネージ スレッドの関係を制御できるためです。たとえば、高度なホストでは、CLR Hosting API を使用して、同一のオペレーティング システム スレッドに対して複数のマネージ スレッドをスケジュールしたり、1 つのマネージ スレッドを複数のオペレーティング システム スレッド間で移動させたりすることができます。 |
使用例Imports System Imports System.Threading ' Simple threading scenario: Start a Shared method running ' on a second thread. Public Class ThreadExample ' The ThreadProc method is called when the thread starts. ' It loops ten times, writing to the console and yielding ' the rest of its time slice each time, and then ends. Public Shared Sub ThreadProc() Dim i As Integer For i = 0 To 9 Console.WriteLine("ThreadProc: {0}", i) ' Yield the rest of the time slice. Thread.Sleep(0) Next End Sub Public Shared Sub Main() Console.WriteLine("Main thread: Start a second thread.") ' The constructor for the Thread class requires a ThreadStart ' delegate. The Visual Basic AddressOf operator creates this ' delegate for you. Dim t As New Thread(AddressOf ThreadProc) ' Start ThreadProc. On a uniprocessor, the thread does not get ' any processor time until the main thread yields. Uncomment ' the Thread.Sleep that follows t.Start() to see the difference. t.Start() 'Thread.Sleep(0) Dim i As Integer For i = 1 To 4 Console.WriteLine("Main thread: Do some work.") Thread.Sleep(0) Next Console.WriteLine("Main thread: Call Join(), to wait until ThreadProc ends.") t.Join() Console.WriteLine("Main thread: ThreadProc.Join has returned. Press Enter to end program.") Console.ReadLine() End Sub End Class
using System; using System.Threading; // Simple threading scenario: Start a static method running // on a second thread. public class ThreadExample { // The ThreadProc method is called when the thread starts. // It loops ten times, writing to the console and yielding // the rest of its time slice each time, and then ends. public static void ThreadProc() { for (int i = 0; i < 10; i++) { Console.WriteLine("ThreadProc: {0}", i); // Yield the rest of the time slice. Thread.Sleep(0); } } public static void Main() { Console.WriteLine("Main thread: Start a second thread."); // The constructor for the Thread class requires a ThreadStart // delegate that represents the method to be executed on the // thread. C# simplifies the creation of this delegate. Thread t = new Thread(new ThreadStart(ThreadProc)); // Start ThreadProc. On a uniprocessor, the thread does not get // any processor time until the main thread yields. Uncomment // the Thread.Sleep that follows t.Start() to see the difference. t.Start(); //Thread.Sleep(0); for (int i = 0; i < 4; i++) { Console.WriteLine("Main thread: Do some work."); Thread.Sleep(0); } Console.WriteLine("Main thread: Call Join(), to wait until ThreadProc ends."); t.Join(); Console.WriteLine("Main thread: ThreadProc.Join has returned. Press Enter to end program."); Console.ReadLine(); } }
// [C++] // Compile using /clr option. using namespace System; using namespace System::Threading; // Simple threading scenario: Start a Shared method running // on a second thread. public ref class ThreadExample { public: // The ThreadProc method is called when the thread starts. // It loops ten times, writing to the console and yielding // the rest of its time slice each time, and then ends. static void ThreadProc() { for ( int i = 0; i < 10; i++ ) { Console::Write( "ThreadProc: " ); Console::WriteLine( i ); // Yield the rest of the time slice. Thread::Sleep( 0 ); } } }; int main() { Console::WriteLine( "Main thread: Start a second thread." ); // Create the thread, passing a ThreadStart delegate that // represents the ThreadExample::ThreadProc method. For a // delegate representing a static method, no object is // required. Thread^ oThread = gcnew Thread( gcnew ThreadStart( &ThreadExample::ThreadProc ) ); // Start the thread. On a uniprocessor, the thread does not get // any processor time until the main thread yields. Uncomment // the Thread.Sleep that follows t.Start() to see the difference. oThread->Start(); //Thread::Sleep(0); for ( int i = 0; i < 4; i++ ) { Console::WriteLine( "Main thread: Do some work." ); Thread::Sleep( 0 ); } Console::WriteLine( "Main thread: Call Join(), to wait until ThreadProc ends." ); oThread->Join(); Console::WriteLine( "Main thread: ThreadProc.Join has returned. Press Enter to end program." ); Console::ReadLine(); return 0; }
import System.*; import System.Threading.*; // Simple threading scenario: Start a static method running // on a second thread. public class ThreadExample { // The ThreadProc method is called when the thread starts. // It loops ten times, writing to the console and yielding // the rest of its time slice each time, and then ends. public static void ThreadProc() throws InterruptedException { for (int i = 0; i < 10; i++) { Console.WriteLine("ThreadProc: {0}", System.Convert.ToString(i)); // Yield the rest of the time slice. Thread.sleep(0); } } //ThreadProc public static void main(String[] args) throws InterruptedException { Console.WriteLine("Main thread: Start a second thread."); // The constructor for the Thread class requires a ThreadStart // delegate that represents the method to be executed on the // thread. J# simplifies the creation of this delegate. System.Threading.Thread t = new System.Threading.Thread(new ThreadStart(ThreadProc)); // Start ThreadProc. On a uniprocessor, the thread does not get // any processor time until the main thread yields. Uncomment // the Thread.Sleep that follows t.Start() to see the difference. t.Start(); //Thread.Sleep(0); for (int i = 0; i < 4; i++) { Console.WriteLine("Main thread: Do some work."); Thread.sleep(0); } Console.WriteLine("Main thread: Call Join(), to wait until " + "ThreadProc ends."); t.Join(); Console.WriteLine("Main thread: ThreadProc.Join has returned." + " Press Enter to end program."); Console.ReadLine(); } //main } //ThreadExample
[VB, C++, C#] Main thread: Start a second thread. Main thread: Do some work. ThreadProc: 0 Main thread: Do some work. ThreadProc: 1 Main thread: Do some work. ThreadProc: 2 Main thread: Do some work. ThreadProc: 3 Main thread: Call Join(), to wait until ThreadProc ends. ThreadProc: 4 ThreadProc: 5 ThreadProc: 6 ThreadProc: 7 ThreadProc: 8 ThreadProc: 9 Main thread: ThreadProc.Join has returned. Press Enter to end program.
継承階層
System.Object
System.Runtime.ConstrainedExecution.CriticalFinalizerObject
System.Threading.Thread
System.Runtime.ConstrainedExecution.CriticalFinalizerObject
System.Threading.Thread
スレッド セーフプラットフォームWindows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。
バージョン情報参照- Thread クラスのページへのリンク
