55 lines
1.2 KiB
C#
55 lines
1.2 KiB
C#
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////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: ProtectionDomain.cs
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//
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// Note:
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//
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// SmartSpinlock is an object that wraps the SpinLock struct
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// and avoids actually interlocking memory on a single-processor
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// box.
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//
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using Microsoft.Singularity;
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using System;
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using System.Runtime.CompilerServices;
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namespace System.Threading
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{
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public class SmartSpinlock
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{
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#if SINGULARITY_MP
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private SpinLock spin;
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#endif
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public SmartSpinlock()
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{
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#if SINGULARITY_MP
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this.spin = new SpinLock();
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#endif
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}
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[Inline]
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public bool Lock()
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{
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bool enabled = Processor.DisableInterrupts();
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#if SINGULARITY_MP
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spin.Acquire(Thread.CurrentThread);
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#endif // SINGULARITY_MP
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return enabled;
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}
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[Inline]
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public void Unlock(bool iflag)
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{
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#if SINGULARITY_MP
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spin.Release(Thread.CurrentThread);
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#endif // SINGULARITY_MP
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Processor.RestoreInterrupts(iflag);
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}
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}
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}
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