54 lines
1.7 KiB
C#
54 lines
1.7 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="UnsafeNativeMethods.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace Microsoft.Win32 {
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using System.Runtime.InteropServices;
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using System;
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using System.Security.Permissions;
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using Microsoft.Win32.SafeHandles;
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using System.Configuration;
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// Safehandle for memory handles
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[System.Security.SuppressUnmanagedCodeSecurityAttribute()]
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internal sealed class SafeNativeMemoryHandle : SafeHandleZeroOrMinusOneIsInvalid {
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private bool _useLocalFree = false;
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[SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
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internal SafeNativeMemoryHandle()
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: this(false) {
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}
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internal SafeNativeMemoryHandle(bool useLocalFree)
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: base(true) {
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_useLocalFree = useLocalFree;
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}
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[SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
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internal SafeNativeMemoryHandle(IntPtr handle, bool ownsHandle)
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: base(ownsHandle) {
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SetHandle(handle);
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}
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internal void SetDataHandle(IntPtr handle) {
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SetHandle(handle);
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}
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override protected bool ReleaseHandle() {
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if (handle != IntPtr.Zero) {
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if (_useLocalFree == true)
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UnsafeNativeMethods.LocalFree(handle);
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else
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Marshal.FreeHGlobal(handle);
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handle = IntPtr.Zero;
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return true;
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}
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return false;
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}
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}
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}
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