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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using Microsoft.Win32;
using System.Runtime.CompilerServices;
namespace System.Buffers
{
internal sealed partial class TlsOverPerCoreLockedStacksArrayPool<T>
{
/// <summary>Get an identifier for the current thread to use to index into the stacks.</summary>
private static int ExecutionId
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
// On Unix, CurrentProcessorNumber is implemented in terms of sched_getcpu, which
// doesn't exist on all platforms. On those it doesn't exist on, GetCurrentProcessorNumber
// returns -1. As a fallback in that case and to spread the threads across the buckets
// by default, we use the current managed thread ID as a proxy.
int id = CurrentProcessorNumber;
if (id < 0) id = Environment.CurrentManagedThreadId;
return id;
}
}
}
}
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