Thread.Join Metoda

Definice

Blokuje volající vlákno, dokud vlákno Nereprezentované touto instancí skončí.Blocks the calling thread until the thread represented by this instance terminates.

Přetížení

Join()

Blokuje volající vlákno, dokud vlákno reprezentované touto instancí nekončí, a přitom pokračuje v provádění standardních SendMessagech pump a modelů COM.Blocks the calling thread until the thread represented by this instance terminates, while continuing to perform standard COM and SendMessage pumping.

Join(Int32)

Blokuje volající vlákno, dokud vlákno reprezentované touto instancí nekončí nebo zadaný čas uplynul, a přitom pokračuje v provádění standardních prostředků COM a SendMessage.Blocks the calling thread until the thread represented by this instance terminates or the specified time elapses, while continuing to perform standard COM and SendMessage pumping.

Join(TimeSpan)

Blokuje volající vlákno, dokud vlákno reprezentované touto instancí nekončí nebo zadaný čas uplynul, a přitom pokračuje v provádění standardních prostředků COM a SendMessage.Blocks the calling thread until the thread represented by this instance terminates or the specified time elapses, while continuing to perform standard COM and SendMessage pumping.

Join()

Blokuje volající vlákno, dokud vlákno reprezentované touto instancí nekončí, a přitom pokračuje v provádění standardních SendMessagech pump a modelů COM.Blocks the calling thread until the thread represented by this instance terminates, while continuing to perform standard COM and SendMessage pumping.

public:
 void Join();
public void Join ();
member this.Join : unit -> unit
Public Sub Join ()

Výjimky

Volající se pokusil připojit k vláknu, které je ve stavu Unstarted.The caller attempted to join a thread that is in the Unstarted state.

Vlákno bylo přerušeno během čekání.The thread is interrupted while waiting.

Poznámky

Join je synchronizační metoda, která blokuje volající vlákno (to znamená vlákno, které volá metodu), dokud vlákno, jehož Join metoda je volána, je dokončeno.Join is a synchronization method that blocks the calling thread (that is, the thread that calls the method) until the thread whose Join method is called has completed. Tuto metodu použijte, chcete-li zajistit, že vlákno bylo ukončeno.Use this method to ensure that a thread has been terminated. Volající bude blokovat neomezenou dobu, pokud vlákno nekončí.The caller will block indefinitely if the thread does not terminate. V následujícím příkladu vlákno Thread1 volá metodu Join() Thread2, která způsobí, že Thread1 zablokuje, dokud se nedokončí Thread2.In the following example, the Thread1 thread calls the Join() method of Thread2, which causes Thread1 to block until Thread2 has completed.

using System;
using System.Threading;

public class Example
{
   static Thread thread1, thread2;
   
   public static void Main()
   {
      thread1 = new Thread(ThreadProc);
      thread1.Name = "Thread1";
      thread1.Start();
      
      thread2 = new Thread(ThreadProc);
      thread2.Name = "Thread2";
      thread2.Start();   
   }

   private static void ThreadProc()
   {
      Console.WriteLine("\nCurrent thread: {0}", Thread.CurrentThread.Name);
      if (Thread.CurrentThread.Name == "Thread1" && 
          thread2.ThreadState != ThreadState.Unstarted)
         thread2.Join();
      
      Thread.Sleep(4000);
      Console.WriteLine("\nCurrent thread: {0}", Thread.CurrentThread.Name);
      Console.WriteLine("Thread1: {0}", thread1.ThreadState);
      Console.WriteLine("Thread2: {0}\n", thread2.ThreadState);
   }
}
// The example displays output like the following:
//       Current thread: Thread1
//       
//       Current thread: Thread2
//       
//       Current thread: Thread2
//       Thread1: WaitSleepJoin
//       Thread2: Running
//       
//       
//       Current thread: Thread1
//       Thread1: Running
//       Thread2: Stopped
Imports System.Threading

Module Example
   Dim thread1, thread2 As Thread

   Public Sub Main()
      thread1 = new Thread(AddressOf ThreadProc)
      thread1.Name = "Thread1"
      thread1.Start()
      
      thread2 = New Thread(AddressOf ThreadProc)
      thread2.Name = "Thread2"
      thread2.Start()   
   End Sub

   Private Sub ThreadProc()
      Console.WriteLine()
      Console.WriteLine("Current thread: {0}", Thread.CurrentThread.Name)
      If (Thread.CurrentThread.Name = "Thread1" And 
          thread2.ThreadState <> ThreadState.Unstarted)
         thread2.Join()
      End If
      Thread.Sleep(4000)
      Console.WriteLine()
      Console.WriteLine("Current thread: {0}", Thread.CurrentThread.Name)
      Console.WriteLine("Thread1: {0}", thread1.ThreadState)
      Console.WriteLine("Thread2: {0}", thread2.ThreadState)
      Console.WriteLine()
   End Sub
End Module
' The example displays output like the following :
'       Current thread: Thread1
'       
'       Current thread: Thread2
'       
'       Current thread: Thread2
'       Thread1: WaitSleepJoin
'       Thread2: Running
'       
'       
'       Current thread: Thread1
'       Thread1: Running
'       Thread2: Stopped

Pokud vlákno již bylo ukončeno při volání Join, metoda se vrátí okamžitě.If the thread has already terminated when Join is called, the method returns immediately.

Varování

Nikdy byste neměli volat metodu Join objektu Thread, který představuje aktuální vlákno z aktuálního vlákna.You should never call the Join method of the Thread object that represents the current thread from the current thread. Tím dojde k tomu, že aplikace přestane reagovat, protože aktuální vlákno čeká na sebe sama po neomezenou dobu.This causes your app to become unresponsive because the current thread waits upon itself indefinitely,

Tato metoda změní stav volajícího vlákna tak, aby zahrnoval ThreadState.WaitSleepJoin.This method changes the state of the calling thread to include ThreadState.WaitSleepJoin. Nelze vyvolat Join ve vlákně, které je ve stavu ThreadState.Unstarted.You cannot invoke Join on a thread that is in the ThreadState.Unstarted state.

Viz také

Join(Int32)

Blokuje volající vlákno, dokud vlákno reprezentované touto instancí nekončí nebo zadaný čas uplynul, a přitom pokračuje v provádění standardních prostředků COM a SendMessage.Blocks the calling thread until the thread represented by this instance terminates or the specified time elapses, while continuing to perform standard COM and SendMessage pumping.

public:
 bool Join(int millisecondsTimeout);
public bool Join (int millisecondsTimeout);
member this.Join : int -> bool
Public Function Join (millisecondsTimeout As Integer) As Boolean

Parametry

millisecondsTimeout
Int32

Počet milisekund, po které se má čekat na ukončení vlákna.The number of milliseconds to wait for the thread to terminate.

Návraty

true, pokud bylo vlákno ukončeno; false, pokud vlákno nebylo ukončeno po uplynutí časového intervalu určeného parametrem millisecondsTimeout.true if the thread has terminated; false if the thread has not terminated after the amount of time specified by the millisecondsTimeout parameter has elapsed.

Výjimky

Hodnota millisecondsTimeout je záporná a není rovna Infinite v milisekundách.The value of millisecondsTimeout is negative and is not equal to Infinite in milliseconds.

Vlákno nebylo spuštěno.The thread has not been started.

millisecondsTimeout je menší než-1 (timeout. Infinite).millisecondsTimeout is less than -1 (Timeout.Infinite).

Vlákno bylo přerušeno během čekání.The thread was interrupted while waiting.

Poznámky

Join(Int32) je metoda synchronizace, která blokuje volající vlákno (to znamená vlákno, které volá metodu), dokud vlákno, jehož Join metoda volána, byla dokončena nebo uplynul časový limit.Join(Int32) is a synchronization method that blocks the calling thread (that is, the thread that calls the method) until either the thread whose Join method is called has completed or the time-out interval has elapsed. V následujícím příkladu vlákno Thread1 volá metodu Join() Thread2, která způsobí, že Thread1 zablokuje, dokud se nedokončí Thread2 nebo 2 sekundy uplynuly.In the following example, the Thread1 thread calls the Join() method of Thread2, which causes Thread1 to block either until Thread2 has completed or 2 seconds have elapsed.

using System;
using System.Threading;

public class Example
{
   static Thread thread1, thread2;
   
   public static void Main()
   {
      thread1 = new Thread(ThreadProc);
      thread1.Name = "Thread1";
      thread1.Start();
      
      thread2 = new Thread(ThreadProc);
      thread2.Name = "Thread2";
      thread2.Start();   
   }

   private static void ThreadProc()
   {
      Console.WriteLine("\nCurrent thread: {0}", Thread.CurrentThread.Name);
      if (Thread.CurrentThread.Name == "Thread1" && 
          thread2.ThreadState != ThreadState.Unstarted)
         if (thread2.Join(2000))
            Console.WriteLine("Thread2 has termminated.");
         else
            Console.WriteLine("The timeout has elapsed and Thread1 will resume.");   
      
      Thread.Sleep(4000);
      Console.WriteLine("\nCurrent thread: {0}", Thread.CurrentThread.Name);
      Console.WriteLine("Thread1: {0}", thread1.ThreadState);
      Console.WriteLine("Thread2: {0}\n", thread2.ThreadState);
   }
}
// The example displays the following output:
//       Current thread: Thread1
//       
//       Current thread: Thread2
//       The timeout has elapsed and Thread1 will resume.
//       
//       Current thread: Thread2
//       Thread1: WaitSleepJoin
//       Thread2: Running
//       
//       
//       Current thread: Thread1
//       Thread1: Running
//       Thread2: Stopped
Imports System.Threading

Module Example
   Dim thread1, thread2 As Thread

   Public Sub Main()
      thread1 = new Thread(AddressOf ThreadProc)
      thread1.Name = "Thread1"
      thread1.Start()
      
      thread2 = New Thread(AddressOf ThreadProc)
      thread2.Name = "Thread2"
      thread2.Start()   
   End Sub

   Private Sub ThreadProc()
      Console.WriteLine()
      Console.WriteLine("Current thread: {0}", Thread.CurrentThread.Name)
      If (Thread.CurrentThread.Name = "Thread1" And 
          thread2.ThreadState <> ThreadState.Unstarted)
         If thread2.Join(TimeSpan.FromSeconds(2))
            Console.WriteLine("Thread2 has termminated.")
         Else
            Console.WriteLine("The timeout has elapsed and Thread1 will resume.")
         End If      
      End If
      Thread.Sleep(4000)
      Console.WriteLine()
      Console.WriteLine("Current thread: {0}", Thread.CurrentThread.Name)
      Console.WriteLine("Thread1: {0}", thread1.ThreadState)
      Console.WriteLine("Thread2: {0}", thread2.ThreadState)
      Console.WriteLine()
   End Sub
End Module
' The example displays the following output:
'       Current thread: Thread1
'       
'       Current thread: Thread2
'       
'       Current thread: Thread2
'       Thread1: WaitSleepJoin
'       Thread2: Running
'       
'       
'       Current thread: Thread1
'       Thread1: Running
'       Thread2: Stopped

Pokud je pro parametr millisecondsTimeout zadána Timeout.Infinite, tato metoda se chová stejně jako přetížení metody Join(), s výjimkou návratové hodnoty.If Timeout.Infinite is specified for the millisecondsTimeout parameter, this method behaves identically to the Join() method overload, except for the return value.

Pokud vlákno již bylo ukončeno při volání Join, metoda se vrátí okamžitě.If the thread has already terminated when Join is called, the method returns immediately.

Tato metoda změní stav volajícího vlákna tak, aby zahrnoval ThreadState.WaitSleepJoin.This method changes the state of the calling thread to include ThreadState.WaitSleepJoin. Nelze vyvolat Join ve vlákně, které je ve stavu ThreadState.Unstarted.You cannot invoke Join on a thread that is in the ThreadState.Unstarted state.

Viz také

Join(TimeSpan)

Blokuje volající vlákno, dokud vlákno reprezentované touto instancí nekončí nebo zadaný čas uplynul, a přitom pokračuje v provádění standardních prostředků COM a SendMessage.Blocks the calling thread until the thread represented by this instance terminates or the specified time elapses, while continuing to perform standard COM and SendMessage pumping.

public:
 bool Join(TimeSpan timeout);
public bool Join (TimeSpan timeout);
member this.Join : TimeSpan -> bool
Public Function Join (timeout As TimeSpan) As Boolean

Parametry

timeout
TimeSpan

TimeSpan nastaveno na dobu, po kterou se má čekat na ukončení vlákna.A TimeSpan set to the amount of time to wait for the thread to terminate.

Návraty

true, pokud bylo vlákno ukončeno; false, pokud vlákno nebylo ukončeno po uplynutí časového intervalu určeného parametrem timeout.true if the thread terminated; false if the thread has not terminated after the amount of time specified by the timeout parameter has elapsed.

Výjimky

Hodnota timeout je záporná a není rovna Infinite v milisekundách nebo je větší než MaxValue milisekund.The value of timeout is negative and is not equal to Infinite in milliseconds, or is greater than MaxValue milliseconds.

Volající se pokusil připojit k vláknu, které je ve stavu Unstarted.The caller attempted to join a thread that is in the Unstarted state.

Příklady

Následující příklad kódu ukazuje, jak použít TimeSpan hodnotu s metodou Join.The following code example demonstrates how to use a TimeSpan value with the Join method.

using namespace System;
using namespace System::Threading;

static TimeSpan waitTime = TimeSpan(0,0,1);

ref class Test
{
public:
   static void Work()
   {
      Thread::Sleep( waitTime );
   }

};

int main()
{
   Thread^ newThread = gcnew Thread( gcnew ThreadStart( Test::Work ) );
   newThread->Start();
   if ( newThread->Join( waitTime + waitTime ) )
   {
      Console::WriteLine( "New thread terminated." );
   }
   else
   {
      Console::WriteLine( "Join timed out." );
   }
}
// The example displays the following output:
//        New thread terminated.
using System;
using System.Threading;

class Test
{
    static TimeSpan waitTime = new TimeSpan(0, 0, 1);

    public static void Main() 
    {
        Thread newThread = new Thread(Work);
        newThread.Start();

        if(newThread.Join(waitTime + waitTime)) {
            Console.WriteLine("New thread terminated.");
        }
        else {
            Console.WriteLine("Join timed out.");
        }
    }

    static void Work()
    {
        Thread.Sleep(waitTime);
    }
}
// The example displays the following output:
//        New thread terminated.
Imports System.Threading

Public Module Test
    Dim waitTime As New TimeSpan(0, 0, 1)

    Public Sub Main() 
        Dim newThread As New Thread(AddressOf Work)
        newThread.Start()

        If newThread.Join(waitTime + waitTime) Then
            Console.WriteLine("New thread terminated.")
        Else
            Console.WriteLine("Join timed out.")
        End If
    End Sub

    Private Sub Work()
        Thread.Sleep(waitTime)
    End Sub
End Module
' The example displays the following output:
'       New thread terminated.

Poznámky

Join(TimeSpan) je metoda synchronizace, která blokuje volající vlákno (to znamená vlákno, které volá metodu), dokud vlákno, jehož Join metoda volána, byla dokončena nebo uplynul časový limit.Join(TimeSpan) is a synchronization method that blocks the calling thread (that is, the thread that calls the method) until either the thread whose Join method is called has completed or the time-out interval has elapsed. V následujícím příkladu vlákno Thread1 volá metodu Join() Thread2, která způsobí, že Thread1 zablokuje, dokud se nedokončí Thread2 nebo 2 sekundy uplynuly.In the following example, the Thread1 thread calls the Join() method of Thread2, which causes Thread1 to block either until Thread2 has completed or 2 seconds have elapsed.

using System;
using System.Threading;

public class Example
{
   static Thread thread1, thread2;
   
   public static void Main()
   {
      thread1 = new Thread(ThreadProc);
      thread1.Name = "Thread1";
      thread1.Start();
      
      thread2 = new Thread(ThreadProc);
      thread2.Name = "Thread2";
      thread2.Start();   
   }

   private static void ThreadProc()
   {
      Console.WriteLine("\nCurrent thread: {0}", Thread.CurrentThread.Name);
      if (Thread.CurrentThread.Name == "Thread1" && 
          thread2.ThreadState != ThreadState.Unstarted)
         if (thread2.Join(TimeSpan.FromSeconds(2)))
            Console.WriteLine("Thread2 has termminated.");
         else
            Console.WriteLine("The timeout has elapsed and Thread1 will resume.");   
      
      Thread.Sleep(4000);
      Console.WriteLine("\nCurrent thread: {0}", Thread.CurrentThread.Name);
      Console.WriteLine("Thread1: {0}", thread1.ThreadState);
      Console.WriteLine("Thread2: {0}\n", thread2.ThreadState);
   }
}
// The example displays the following output:
//       Current thread: Thread1
//       
//       Current thread: Thread2
//       The timeout has elapsed and Thread1 will resume.
//       
//       Current thread: Thread2
//       Thread1: WaitSleepJoin
//       Thread2: Running
//       
//       
//       Current thread: Thread1
//       Thread1: Running
//       Thread2: Stopped
Imports System.Threading

Module Example
   Dim thread1, thread2 As Thread

   Public Sub Main()
      thread1 = new Thread(AddressOf ThreadProc)
      thread1.Name = "Thread1"
      thread1.Start()
      
      thread2 = New Thread(AddressOf ThreadProc)
      thread2.Name = "Thread2"
      thread2.Start()   
   End Sub

   Private Sub ThreadProc()
      Console.WriteLine()
      Console.WriteLine("Current thread: {0}", Thread.CurrentThread.Name)
      If (Thread.CurrentThread.Name = "Thread1" And 
          thread2.ThreadState <> ThreadState.Unstarted)
         If thread2.Join(2000)
            Console.WriteLine("Thread2 has termminated.")
         Else
            Console.WriteLine("The timeout has elapsed and Thread1 will resume.")
         End If      
      End If
      Thread.Sleep(4000)
      Console.WriteLine()
      Console.WriteLine("Current thread: {0}", Thread.CurrentThread.Name)
      Console.WriteLine("Thread1: {0}", thread1.ThreadState)
      Console.WriteLine("Thread2: {0}", thread2.ThreadState)
      Console.WriteLine()
   End Sub
End Module
' The example displays the following output:
'       Current thread: Thread1
'       
'       Current thread: Thread2
'       
'       Current thread: Thread2
'       Thread1: WaitSleepJoin
'       Thread2: Running
'       
'       
'       Current thread: Thread1
'       Thread1: Running
'       Thread2: Stopped

Pokud je pro timeoutzadána Timeout.Infinite, tato metoda se chová stejně jako přetížení metody Join(), s výjimkou návratové hodnoty.If Timeout.Infinite is specified for timeout, this method behaves identically to the Join() method overload, except for the return value.

Pokud vlákno již bylo ukončeno při volání Join, metoda se vrátí okamžitě.If the thread has already terminated when Join is called, the method returns immediately.

Tato metoda změní stav aktuálního vlákna tak, aby zahrnoval WaitSleepJoin.This method changes the state of the current thread to include WaitSleepJoin. Nelze vyvolat Join ve vlákně, které je ve stavu ThreadState.Unstarted.You cannot invoke Join on a thread that is in the ThreadState.Unstarted state.

Viz také

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