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80 lines
2.0 KiB
80 lines
2.0 KiB
// License: Apache 2.0. See LICENSE file in root directory.
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// Copyright(c) 2017 Intel Corporation. All Rights Reserved.
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namespace Intel.RealSense.Base
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{
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using System;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using System.Security;
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[SuppressUnmanagedCodeSecurity]
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate void Deleter(IntPtr ptr);
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/// <summary>
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/// Native handle with deleter delegate to release unmanaged resources
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/// </summary>
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// TODO: CriticalFinalizerObject & CER
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//[DebuggerDisplay("{deleter?.Method.Name,nq}", Name = nameof(Deleter))]
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internal sealed class DeleterHandle : IDisposable
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{
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private IntPtr handle;
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private Deleter deleter;
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public IntPtr Handle => handle;
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/// <summary>
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/// Gets a value indicating whether this handle is invalid
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/// </summary>
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public bool IsInvalid => handle == IntPtr.Zero;
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public DeleterHandle(IntPtr ptr, Deleter deleter)
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{
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handle = ptr;
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this.deleter = deleter;
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}
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public void SetHandleAsInvalid()
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{
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handle = IntPtr.Zero;
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GC.SuppressFinalize(this);
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}
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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public void Dispose(bool disposing)
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{
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if (handle == IntPtr.Zero)
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{
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return;
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}
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deleter?.Invoke(handle);
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handle = IntPtr.Zero;
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}
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internal void Reset(IntPtr ptr)
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{
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handle = ptr;
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GC.ReRegisterForFinalize(this);
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}
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internal void Reset(IntPtr ptr, Deleter deleter)
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{
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this.handle = ptr;
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this.deleter = deleter;
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//GC.ReRegisterForFinalize(this);
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}
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~DeleterHandle()
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{
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//Console.WriteLine($"~{handle} {deleter?.Method}");
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Dispose(false);
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}
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}
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} |