96 lines
2.9 KiB
C#
96 lines
2.9 KiB
C#
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////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity - Singularity ABI
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: MutexHandle.cs
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//
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// Note:
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//
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using System;
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using System.Runtime.CompilerServices;
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using System.Threading;
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using Microsoft.Singularity;
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using Microsoft.Singularity.Memory;
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using Microsoft.Singularity.V1.Services;
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namespace Microsoft.Singularity.V1.Threads
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{
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[CLSCompliant(false)]
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public struct MutexHandle // : public SyncHandle
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{
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public readonly UIntPtr id; // could be moved to SyncHandle
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public static readonly MutexHandle Zero = new MutexHandle();
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internal MutexHandle(UIntPtr id)
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{
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this.id = id;
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}
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[ExternalEntryPoint]
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public static unsafe bool CreateImpl(
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bool initiallyOwned,
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MutexHandle * handle)
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{
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return Create(initiallyOwned, out *handle);
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}
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public static bool Create(bool initiallyOwned,
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out MutexHandle handle)
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{
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//
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// Create a new mutex, and a handle in the current process
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// to hold it.
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//
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handle = new MutexHandle(Thread.CurrentProcess.AllocateHandle(
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new Mutex(initiallyOwned)));
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Tracing.Log(Tracing.Debug, "MutexHandle.Create(, out id={0:x8})",
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handle.id);
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return true;
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}
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[ExternalEntryPoint]
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public static void Dispose(MutexHandle handle)
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{
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Tracing.Log(Tracing.Debug, "MutexHandle.Dispose(id={0:x8})",
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handle.id);
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//
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// Releasing the handle will allow the mutex to be
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// garbage-collected.
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//
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Thread.CurrentProcess.ReleaseHandle(handle.id);
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}
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[ExternalEntryPoint]
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public static void Release(MutexHandle handle)
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{
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Tracing.Log(Tracing.Debug, "MutexHandle.Release(id={0:x8})",
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handle.id);
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//
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// Convert the handle to a mutex; release the mutex.
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//
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Mutex mutex = HandleTable.GetHandle(handle.id) as Mutex;
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mutex.ReleaseMutex();
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}
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[ExternalEntryPoint]
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public static bool IsOwnedByCurrentThread(MutexHandle handle)
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{
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Tracing.Log(Tracing.Debug, "MutexHandle.IsOwnedByCurrentThread(id={0:x8})",
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handle.id);
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//
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// Convert the handle to a mutex; check the ownership of the mutex.
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//
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Mutex mutex = HandleTable.GetHandle(handle.id) as Mutex;
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return mutex.IsOwnedByCurrentThread();
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}
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}
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}
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