Thread.IsThreadPoolThread Property
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Gets a value indicating whether or not a thread belongs to the managed thread pool.
public:
property bool IsThreadPoolThread { bool get(); };
public bool IsThreadPoolThread { get; }
member this.IsThreadPoolThread : bool
Public ReadOnly Property IsThreadPoolThread As Boolean
true
if this thread belongs to the managed thread pool; otherwise, false
.
The following code example shows how to determine whether a thread is from the thread pool.
using namespace System;
using namespace System::Threading;
ref class IsThreadPool
{
public:
static void ThreadMethod()
{
Console::WriteLine( "ThreadOne, executing ThreadMethod, "
"is {0}from the thread pool.", Thread::CurrentThread->IsThreadPoolThread ? (String^)"" : "not " );
}
static void WorkMethod( Object^ stateInfo )
{
Console::WriteLine( "ThreadTwo, executing WorkMethod, "
"is {0}from the thread pool.", Thread::CurrentThread->IsThreadPoolThread ? (String^)"" : "not " );
// Signal that this thread is finished.
dynamic_cast<AutoResetEvent^>(stateInfo)->Set();
}
};
int main()
{
AutoResetEvent^ autoEvent = gcnew AutoResetEvent( false );
Thread^ regularThread = gcnew Thread( gcnew ThreadStart( &IsThreadPool::ThreadMethod ) );
regularThread->Start();
ThreadPool::QueueUserWorkItem( gcnew WaitCallback( &IsThreadPool::WorkMethod ), autoEvent );
// Wait for foreground thread to end.
regularThread->Join();
// Wait for background thread to end.
autoEvent->WaitOne();
}
using System;
using System.Threading;
class IsThreadPool
{
static void Main()
{
AutoResetEvent autoEvent = new AutoResetEvent(false);
Thread regularThread =
new Thread(new ThreadStart(ThreadMethod));
regularThread.Start();
ThreadPool.QueueUserWorkItem(new WaitCallback(WorkMethod),
autoEvent);
// Wait for foreground thread to end.
regularThread.Join();
// Wait for background thread to end.
autoEvent.WaitOne();
}
static void ThreadMethod()
{
Console.WriteLine("ThreadOne, executing ThreadMethod, " +
"is {0}from the thread pool.",
Thread.CurrentThread.IsThreadPoolThread ? "" : "not ");
}
static void WorkMethod(object stateInfo)
{
Console.WriteLine("ThreadTwo, executing WorkMethod, " +
"is {0}from the thread pool.",
Thread.CurrentThread.IsThreadPoolThread ? "" : "not ");
// Signal that this thread is finished.
((AutoResetEvent)stateInfo).Set();
}
}
open System.Threading
let threadMethod () =
printfn
$"""ThreadOne, executing ThreadMethod, is {if Thread.CurrentThread.IsThreadPoolThread then
""
else
"not "}from the thread pool."""
let workMethod stateInfo =
printfn
$"""ThreadTwo, executing WorkMethod, is {if Thread.CurrentThread.IsThreadPoolThread then
""
else
"not "}from the thread pool."""
// Signal that this thread is finished.
(unbox<AutoResetEvent> stateInfo).Set() |> ignore
let autoEvent = new AutoResetEvent false
let regularThread = Thread threadMethod
regularThread.Start()
ThreadPool.QueueUserWorkItem(workMethod, autoEvent) |> ignore
// Wait for foreground thread to end.
regularThread.Join()
// Wait for background thread to end.
autoEvent.WaitOne() |> ignore
Option Explicit
Option Strict
Imports System.Threading
Public Class IsThreadPool
<MTAThread> _
Shared Sub Main()
Dim autoEvent As New AutoResetEvent(False)
Dim regularThread As New Thread(AddressOf ThreadMethod)
regularThread.Start()
ThreadPool.QueueUserWorkItem(AddressOf WorkMethod, autoEvent)
' Wait for foreground thread to end.
regularThread.Join()
' Wait for background thread to end.
autoEvent.WaitOne()
End Sub
Shared Sub ThreadMethod()
Console.WriteLine("ThreadOne, executing ThreadMethod, " & _
"is from the thread pool? {0}", _
Thread.CurrentThread.IsThreadPoolThread)
End Sub
Shared Sub WorkMethod(stateInfo As Object)
Console.WriteLine("ThreadTwo, executing WorkMethod, " & _
"is from the thread pool? {0}", _
Thread.CurrentThread.IsThreadPoolThread)
' Signal that this thread is finished.
DirectCast(stateInfo, AutoResetEvent).Set()
End Sub
End Class
For more information see The managed thread pool.
Product | Versions |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
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