86 lines
1.9 KiB
C#
86 lines
1.9 KiB
C#
//
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// System.Runtime.InteropServices.CriticalHandle
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//
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// Author:
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// Kazuki Oikawa (kazuki@panicode.com)
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//
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using System;
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using System.Runtime.ConstrainedExecution;
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using System.Runtime.Serialization;
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namespace System.Runtime.InteropServices
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{
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public abstract class CriticalHandle : CriticalFinalizerObject, IDisposable
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{
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protected IntPtr handle;
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bool _disposed = false;
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
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protected CriticalHandle (IntPtr invalidHandleValue)
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{
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handle = invalidHandleValue;
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}
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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~CriticalHandle ()
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{
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Dispose (false);
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}
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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public void Close ()
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{
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Dispose (true);
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}
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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public void Dispose ()
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{
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Dispose (true);
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}
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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protected virtual void Dispose (bool disposing)
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{
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if (_disposed)
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return;
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if (!IsInvalid){
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if (!_disposed && !ReleaseHandle ()) {
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GC.SuppressFinalize (this);
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} else {
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// Failed in release...
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}
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}
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_disposed = true;
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}
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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protected abstract bool ReleaseHandle ();
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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protected void SetHandle (IntPtr handle)
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{
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this.handle = handle;
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}
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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public void SetHandleAsInvalid()
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{
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_disposed = true;
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}
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public bool IsClosed {
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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get { return _disposed; }
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}
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public abstract bool IsInvalid {
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[ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
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get;
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}
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}
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}
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