mirror of https://github.com/dahall/Vanara.git
460 lines
25 KiB
C#
460 lines
25 KiB
C#
using Microsoft.Win32.SafeHandles;
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using System;
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using System.Runtime.ConstrainedExecution;
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using System.Runtime.InteropServices;
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namespace Vanara.PInvoke
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{
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public static partial class Kernel32
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{
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/// <summary>Optional actions.</summary>
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[Flags]
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public enum DUPLICATE_HANDLE_OPTIONS : uint
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{
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/// <summary>Closes the source handle. This occurs regardless of any error status returned.</summary>
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DUPLICATE_CLOSE_SOURCE = 0x00000001,
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/// <summary>Ignores the dwDesiredAccess parameter. The duplicate handle has the same access as the source handle.</summary>
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DUPLICATE_SAME_ACCESS = 0x00000002,
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}
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/// <summary>A set of bit flags that specify properties of the object handle.</summary>
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[Flags]
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public enum HANDLE_FLAG
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{
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/// <summary>None.</summary>
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NONE = 0,
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/// <summary>
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/// If this flag is set, a child process created with the bInheritHandles parameter of CreateProcess set to TRUE will inherit the
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/// object handle.
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/// </summary>
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HANDLE_FLAG_INHERIT = 1,
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/// <summary>If this flag is set, calling the CloseHandle function will not close the object handle.</summary>
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HANDLE_FLAG_PROTECT_FROM_CLOSE = 2
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}
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/// <summary>Closes an open object handle.</summary>
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/// <param name="hObject">A valid handle to an open object.</param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero. To get extended error information, call <c>GetLastError</c>.</para>
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/// <para>
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/// If the application is running under a debugger, the function will throw an exception if it receives either a handle value that is
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/// not valid or a pseudo-handle value. This can happen if you close a handle twice, or if you call <c>CloseHandle</c> on a handle
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/// returned by the <c>FindFirstFile</c> function instead of calling the <c>FindClose</c> function.
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/// </para>
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/// </returns>
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// BOOL WINAPI CloseHandle( _In_ HANDLE hObject); https://msdn.microsoft.com/en-us/library/windows/desktop/ms724211(v=vs.85).aspx
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[DllImport(Lib.Kernel32, SetLastError = true, ExactSpelling = true)]
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[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
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[PInvokeData("Winbase.h", MSDNShortId = "ms724211")]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool CloseHandle(IntPtr hObject);
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/// <summary>Closes an open object handle.</summary>
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/// <typeparam name="THandle">The type of the handle.</typeparam>
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/// <param name="handle">The handle.</param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero. To get extended error information, call <c>GetLastError</c>.</para>
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/// <para>
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/// If the application is running under a debugger, the function will throw an exception if it receives either a handle value that
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/// is not valid or a pseudo-handle value. This can happen if you close a handle twice, or if you call <c>CloseHandle</c> on a
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/// handle returned by the <c>FindFirstFile</c> function instead of calling the <c>FindClose</c> function.
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/// </para>
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/// </returns>
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[PInvokeData("Winbase.h", MSDNShortId = "ms724211")]
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public static bool CloseHandle<THandle>(THandle handle) where THandle : struct, IKernelHandle => CloseHandle(handle.DangerousGetHandle());
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/// <summary>Compares two object handles to determine if they refer to the same underlying kernel object.</summary>
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/// <param name="hFirstObjectHandle">The first object handle to compare.</param>
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/// <param name="hSecondObjectHandle">The second object handle to compare.</param>
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/// <returns>
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/// A Boolean value that indicates if the two handles refer to the same underlying kernel object. TRUE if the same, otherwise FALSE.
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/// </returns>
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// BOOL WINAPI CompareObjectHandles( _In_ HANDLE hFirstObjectHandle, _In_ HANDLE hSecondObjectHandle); https://msdn.microsoft.com/en-us/library/windows/desktop/mt438733(v=vs.85).aspx
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[DllImport(Lib.KernelBase, SetLastError = false, ExactSpelling = true)]
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[PInvokeData("Handleapi.h", MSDNShortId = "mt438733")]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool CompareObjectHandles(IntPtr hFirstObjectHandle, IntPtr hSecondObjectHandle);
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/// <summary>Determines if two object handles refer to the same underlying kernel object.</summary>
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/// <param name="h1">The first object handle to compare.</param>
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/// <param name="h2">The second object handle to compare.</param>
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/// <returns><see langword="true"/> if the two handles refer to the same underlying kernel object; <see langword="false"/> otherwise.</returns>
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public static bool Equals(this IKernelHandle h1, IKernelHandle h2) => CompareObjectHandles(h1.DangerousGetHandle(), h2?.DangerousGetHandle() ?? IntPtr.Zero);
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/// <summary>Duplicates an object handle.</summary>
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/// <param name="hSourceHandle">
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/// The handle to be duplicated. This is an open object handle that is valid in the context of the source process. For a list of
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/// objects whose handles can be duplicated, see the following Remarks section.
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/// </param>
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/// <param name="bInheritHandle">
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/// A variable that indicates whether the handle is inheritable. If <c>TRUE</c>, the duplicate handle can be inherited by new
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/// processes created by the target process. If <c>FALSE</c>, the new handle cannot be inherited.
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/// </param>
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/// <param name="dwOptions">
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/// <para>Optional actions. This parameter can be zero, or any combination of the following values.</para>
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/// <para>
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/// <list type="table">
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/// <listheader>
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/// <term>Value</term>
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/// <term>Meaning</term>
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/// </listheader>
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/// <item>
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/// <term>DUPLICATE_CLOSE_SOURCE0x00000001</term>
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/// <term>Closes the source handle. This occurs regardless of any error status returned.</term>
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/// </item>
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/// <item>
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/// <term>DUPLICATE_SAME_ACCESS0x00000002</term>
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/// <term>Ignores the dwDesiredAccess parameter. The duplicate handle has the same access as the source handle.</term>
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/// </item>
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/// </list>
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/// </para>
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/// </param>
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/// <param name="dwDesiredAccess">
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/// <para>
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/// The access requested for the new handle. For the flags that can be specified for each object type, see the following Remarks section.
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/// </para>
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/// <para>
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/// This parameter is ignored if the dwOptions parameter specifies the DUPLICATE_SAME_ACCESS flag. Otherwise, the flags that can be
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/// specified depend on the type of object whose handle is to be duplicated.
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/// </para>
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/// </param>
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/// <returns>
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/// <para>The duplicate handle. This handle value is valid in the context of the target process.</para>
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/// <para>
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/// If hSourceHandle is a pseudo handle returned by <c>GetCurrentProcess</c> or <c>GetCurrentThread</c>, <c>DuplicateHandle</c>
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/// converts it to a real handle to a process or thread, respectively.
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/// </para>
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/// </returns>
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public static IntPtr Duplicate(this IKernelHandle hSourceHandle, bool bInheritHandle = true, DUPLICATE_HANDLE_OPTIONS dwOptions = DUPLICATE_HANDLE_OPTIONS.DUPLICATE_SAME_ACCESS, uint dwDesiredAccess = default) =>
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DuplicateHandle(GetCurrentProcess(), hSourceHandle.DangerousGetHandle(), GetCurrentProcess(), out var h, dwDesiredAccess, bInheritHandle, dwOptions) ? h : IntPtr.Zero;
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/// <summary>Duplicates an object handle.</summary>
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/// <typeparam name="THandle">The type of the handle.</typeparam>
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/// <typeparam name="TAccess">The type of the access value (enum or uint).</typeparam>
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/// <param name="hSourceHandle">
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/// The handle to be duplicated. This is an open object handle that is valid in the context of the source process. For a list of
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/// objects whose handles can be duplicated, see the following Remarks section.
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/// </param>
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/// <param name="dwDesiredAccess">
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/// <para>
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/// The access requested for the new handle. For the flags that can be specified for each object type, see the following Remarks section.
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/// </para>
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/// <para>
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/// This parameter is ignored if the dwOptions parameter specifies the DUPLICATE_SAME_ACCESS flag. Otherwise, the flags that can be
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/// specified depend on the type of object whose handle is to be duplicated.
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/// </para>
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/// </param>
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/// <param name="bInheritHandle">
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/// A variable that indicates whether the handle is inheritable. If <c>TRUE</c>, the duplicate handle can be inherited by new
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/// processes created by the target process. If <c>FALSE</c>, the new handle cannot be inherited.
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/// </param>
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/// <param name="dwOptions">
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/// <para>Optional actions. This parameter can be zero, or any combination of the following values.</para>
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/// <para>
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/// <list type="table">
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/// <listheader>
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/// <term>Value</term>
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/// <term>Meaning</term>
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/// </listheader>
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/// <item>
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/// <term>DUPLICATE_CLOSE_SOURCE 0x00000001</term>
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/// <term>Closes the source handle. This occurs regardless of any error status returned.</term>
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/// </item>
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/// <item>
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/// <term>DUPLICATE_SAME_ACCESS 0x00000002</term>
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/// <term>Ignores the dwDesiredAccess parameter. The duplicate handle has the same access as the source handle.</term>
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/// </item>
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/// </list>
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/// </para>
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/// </param>
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/// <returns>
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/// <para>The duplicate handle. This handle value is valid in the context of the target process.</para>
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/// <para>
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/// If hSourceHandle is a pseudo handle returned by <c>GetCurrentProcess</c> or <c>GetCurrentThread</c>, <c>DuplicateHandle</c>
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/// converts it to a real handle to a process or thread, respectively.
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/// </para>
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/// </returns>
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public static THandle Duplicate<THandle, TAccess>(this THandle hSourceHandle, TAccess dwDesiredAccess, bool bInheritHandle = true, DUPLICATE_HANDLE_OPTIONS dwOptions = DUPLICATE_HANDLE_OPTIONS.DUPLICATE_SAME_ACCESS)
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where THandle : SafeKernelHandle where TAccess : struct, IConvertible =>
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Win32Error.ThrowLastErrorIfFalse(SafeKernelHandle.DuplicateHandle(hSourceHandle, out var ret, dwDesiredAccess, default, default, bInheritHandle, dwOptions)) ? ret : default;
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/// <summary>Duplicates an object handle.</summary>
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/// <param name="hSourceProcessHandle">
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/// <para>A handle to the process with the handle to be duplicated.</para>
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/// <para>The handle must have the PROCESS_DUP_HANDLE access right. For more information, see Process Security and Access Rights.</para>
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/// </param>
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/// <param name="hSourceHandle">
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/// The handle to be duplicated. This is an open object handle that is valid in the context of the source process. For a list of
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/// objects whose handles can be duplicated, see the following Remarks section.
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/// </param>
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/// <param name="hTargetProcessHandle">
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/// A handle to the process that is to receive the duplicated handle. The handle must have the PROCESS_DUP_HANDLE access right.
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/// </param>
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/// <param name="lpTargetHandle">
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/// <para>A pointer to a variable that receives the duplicate handle. This handle value is valid in the context of the target process.</para>
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/// <para>
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/// If hSourceHandle is a pseudo handle returned by <c>GetCurrentProcess</c> or <c>GetCurrentThread</c>, <c>DuplicateHandle</c>
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/// converts it to a real handle to a process or thread, respectively.
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/// </para>
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/// <para>
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/// If lpTargetHandle is <c>NULL</c>, the function duplicates the handle, but does not return the duplicate handle value to the
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/// caller. This behavior exists only for backward compatibility with previous versions of this function. You should not use this
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/// feature, as you will lose system resources until the target process terminates.
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/// </para>
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/// </param>
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/// <param name="dwDesiredAccess">
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/// <para>
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/// The access requested for the new handle. For the flags that can be specified for each object type, see the following Remarks section.
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/// </para>
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/// <para>
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/// This parameter is ignored if the dwOptions parameter specifies the DUPLICATE_SAME_ACCESS flag. Otherwise, the flags that can be
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/// specified depend on the type of object whose handle is to be duplicated.
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/// </para>
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/// </param>
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/// <param name="bInheritHandle">
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/// A variable that indicates whether the handle is inheritable. If <c>TRUE</c>, the duplicate handle can be inherited by new
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/// processes created by the target process. If <c>FALSE</c>, the new handle cannot be inherited.
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/// </param>
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/// <param name="dwOptions">
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/// <para>Optional actions. This parameter can be zero, or any combination of the following values.</para>
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/// <para>
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/// <list type="table">
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/// <listheader>
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/// <term>Value</term>
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/// <term>Meaning</term>
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/// </listheader>
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/// <item>
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/// <term>DUPLICATE_CLOSE_SOURCE0x00000001</term>
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/// <term>Closes the source handle. This occurs regardless of any error status returned.</term>
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/// </item>
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/// <item>
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/// <term>DUPLICATE_SAME_ACCESS0x00000002</term>
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/// <term>Ignores the dwDesiredAccess parameter. The duplicate handle has the same access as the source handle.</term>
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/// </item>
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/// </list>
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/// </para>
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/// </param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero. To get extended error information, call <c>GetLastError</c>.</para>
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/// </returns>
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// BOOL WINAPI DuplicateHandle( _In_ HANDLE hSourceProcessHandle, _In_ HANDLE hSourceHandle, _In_ HANDLE hTargetProcessHandle, _Out_
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// LPHANDLE lpTargetHandle, _In_ DWORD dwDesiredAccess, _In_ BOOL bInheritHandle, _In_ DWORD dwOptions); https://msdn.microsoft.com/en-us/library/windows/desktop/ms724251(v=vs.85).aspx
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[DllImport(Lib.Kernel32, SetLastError = true, ExactSpelling = true)]
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[PInvokeData("Winbase.h", MSDNShortId = "ms724251")]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool DuplicateHandle([In] HPROCESS hSourceProcessHandle, [In] IntPtr hSourceHandle, [In] HPROCESS hTargetProcessHandle,
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out IntPtr lpTargetHandle, uint dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, DUPLICATE_HANDLE_OPTIONS dwOptions);
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/// <summary>Retrieves certain properties of an object handle.</summary>
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/// <param name="hObject">
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/// <para>A handle to an object whose information is to be retrieved.</para>
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/// <para>
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/// You can specify a handle to one of the following types of objects: access token, console input buffer, console screen buffer,
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/// event, file, file mapping, job, mailslot, mutex, pipe, printer, process, registry key, semaphore, serial communication device,
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/// socket, thread, or waitable timer.
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/// </para>
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/// </param>
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/// <param name="lpdwFlags">
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/// <para>
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/// A pointer to a variable that receives a set of bit flags that specify properties of the object handle or 0. The following values
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/// are defined.
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/// </para>
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/// <para>
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/// <list type="table">
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/// <listheader>
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/// <term>Value</term>
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/// <term>Meaning</term>
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/// </listheader>
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/// <item>
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/// <term>HANDLE_FLAG_INHERIT0x00000001</term>
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/// <term>
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/// If this flag is set, a child process created with the bInheritHandles parameter of CreateProcess set to TRUE will inherit the
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/// object handle.
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/// </term>
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/// </item>
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/// <item>
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/// <term>HANDLE_FLAG_PROTECT_FROM_CLOSE0x00000002</term>
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/// <term>If this flag is set, calling the CloseHandle function will not close the object handle.</term>
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/// </item>
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/// </list>
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/// </para>
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/// </param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero. To get extended error information, call <c>GetLastError</c>.</para>
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/// </returns>
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// BOOL WINAPI GetHandleInformation( _In_ HANDLE hObject, _Out_ LPDWORD lpdwFlags); https://msdn.microsoft.com/en-us/library/windows/desktop/ms724329(v=vs.85).aspx
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[DllImport(Lib.Kernel32, SetLastError = true, ExactSpelling = true)]
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[PInvokeData("Winbase.h", MSDNShortId = "ms724329")]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool GetHandleInformation([In] IntPtr hObject, out HANDLE_FLAG lpdwFlags);
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/// <summary>Retrieves certain properties of an object handle.</summary>
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/// <param name="hObj">A handle to an object whose information is to be retrieved.</param>
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/// <returns>A variable that receives a set of bit flags that specify properties of the object handle</returns>
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public static HANDLE_FLAG GetInformation(this IKernelHandle hObj) => GetHandleInformation(hObj.DangerousGetHandle(), out var flag) ? flag : 0;
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/// <summary>Sets certain properties of an object handle.</summary>
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/// <param name="hObject">
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/// <para>A handle to an object whose information is to be set.</para>
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/// <para>
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/// You can specify a handle to one of the following types of objects: access token, console input buffer, console screen buffer,
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/// event, file, file mapping, job, mailslot, mutex, pipe, printer, process, registry key, semaphore, serial communication device,
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/// socket, thread, or waitable timer.
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/// </para>
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/// </param>
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/// <param name="dwMask">
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/// A mask that specifies the bit flags to be changed. Use the same constants shown in the description of dwFlags.
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/// </param>
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/// <param name="dwFlags">
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/// <para>
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/// Set of bit flags that specifies properties of the object handle. This parameter can be 0 or one or more of the following values.
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/// </para>
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/// <para>
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/// <list type="table">
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/// <listheader>
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/// <term>Value</term>
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/// <term>Meaning</term>
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/// </listheader>
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/// <item>
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/// <term>HANDLE_FLAG_INHERIT0x00000001</term>
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/// <term>
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/// If this flag is set, a child process created with the bInheritHandles parameter of CreateProcess set to TRUE will inherit the
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/// object handle.
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/// </term>
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/// </item>
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/// <item>
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/// <term>HANDLE_FLAG_PROTECT_FROM_CLOSE0x00000002</term>
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/// <term>If this flag is set, calling the CloseHandle function will not close the object handle.</term>
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/// </item>
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/// </list>
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/// </para>
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/// </param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero. To get extended error information, call <c>GetLastError</c>.</para>
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/// </returns>
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// BOOL WINAPI SetHandleInformation( _In_ HANDLE hObject, _In_ DWORD dwMask, _In_ DWORD dwFlags);// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724935(v=vs.85).aspx
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[DllImport(Lib.Kernel32, SetLastError = true, ExactSpelling = true)]
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[PInvokeData("Winbase.h", MSDNShortId = "ms724935")]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool SetHandleInformation([In] IntPtr hObject, HANDLE_FLAG dwMask, HANDLE_FLAG dwFlags);
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/// <summary>Provides a <see cref="SafeHandle"/> to a handle that releases a created HANDLE instance at disposal using CloseHandle.</summary>
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public abstract class SafeKernelHandle : SafeHANDLE, IKernelHandle
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{
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/// <summary>Initializes a new instance of the <see cref="SafeSyncHandle"/> class.</summary>
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protected SafeKernelHandle() : base() { }
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/// <summary>Initializes a new instance of the <see cref="SafeHANDLE"/> class and assigns an existing handle.</summary>
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/// <param name="preexistingHandle">An <see cref="IntPtr"/> object that represents the pre-existing handle to use.</param>
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/// <param name="ownsHandle">
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/// <see langword="true"/> to reliably release the handle during the finalization phase; otherwise, <see langword="false"/> (not recommended).
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/// </param>
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protected SafeKernelHandle(IntPtr preexistingHandle, bool ownsHandle = true) : base(preexistingHandle, ownsHandle) { }
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/// <summary>Duplicates an object handle.</summary>
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/// <typeparam name="THandle">The type of the handle.</typeparam>
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/// <typeparam name="TAccess">The type of the access value (enum or uint).</typeparam>
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/// <param name="hSourceHandle">
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/// The handle to be duplicated. This is an open object handle that is valid in the context of the source process. For a list of
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/// objects whose handles can be duplicated, see the following Remarks section.
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/// </param>
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/// <param name="lpTargetHandle">
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/// <para>
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/// A pointer to a variable that receives the duplicate handle. This handle value is valid in the context of the target process.
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/// </para>
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/// <para>
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/// If hSourceHandle is a pseudo handle returned by <c>GetCurrentProcess</c> or <c>GetCurrentThread</c>, <c>DuplicateHandle</c>
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/// converts it to a real handle to a process or thread, respectively.
|
|
/// </para>
|
|
/// <para>
|
|
/// If lpTargetHandle is <c>NULL</c>, the function duplicates the handle, but does not return the duplicate handle value to the
|
|
/// caller. This behavior exists only for backward compatibility with previous versions of this function. You should not use
|
|
/// this feature, as you will lose system resources until the target process terminates.
|
|
/// </para>
|
|
/// </param>
|
|
/// <param name="dwDesiredAccess">
|
|
/// <para>
|
|
/// The access requested for the new handle. For the flags that can be specified for each object type, see the following Remarks section.
|
|
/// </para>
|
|
/// <para>
|
|
/// This parameter is ignored if the dwOptions parameter specifies the DUPLICATE_SAME_ACCESS flag. Otherwise, the flags that can
|
|
/// be specified depend on the type of object whose handle is to be duplicated.
|
|
/// </para>
|
|
/// </param>
|
|
/// <param name="hSourceProcessHandle">
|
|
/// <para>A handle to the process with the handle to be duplicated.</para>
|
|
/// <para>The handle must have the PROCESS_DUP_HANDLE access right. For more information, see Process Security and Access Rights.</para>
|
|
/// </param>
|
|
/// <param name="hTargetProcessHandle">
|
|
/// A handle to the process that is to receive the duplicated handle. The handle must have the PROCESS_DUP_HANDLE access right.
|
|
/// </param>
|
|
/// <param name="bInheritHandle">
|
|
/// A variable that indicates whether the handle is inheritable. If <c>TRUE</c>, the duplicate handle can be inherited by new
|
|
/// processes created by the target process. If <c>FALSE</c>, the new handle cannot be inherited.
|
|
/// </param>
|
|
/// <param name="dwOptions">
|
|
/// <para>Optional actions. This parameter can be zero, or any combination of the following values.</para>
|
|
/// <para>
|
|
/// <list type="table">
|
|
/// <listheader>
|
|
/// <term>Value</term>
|
|
/// <term>Meaning</term>
|
|
/// </listheader>
|
|
/// <item>
|
|
/// <term>DUPLICATE_CLOSE_SOURCE0x00000001</term>
|
|
/// <term>Closes the source handle. This occurs regardless of any error status returned.</term>
|
|
/// </item>
|
|
/// <item>
|
|
/// <term>DUPLICATE_SAME_ACCESS0x00000002</term>
|
|
/// <term>Ignores the dwDesiredAccess parameter. The duplicate handle has the same access as the source handle.</term>
|
|
/// </item>
|
|
/// </list>
|
|
/// </para>
|
|
/// </param>
|
|
/// <returns>
|
|
/// <para>If the function succeeds, the return value is nonzero.</para>
|
|
/// <para>If the function fails, the return value is zero. To get extended error information, call <c>GetLastError</c>.</para>
|
|
/// </returns>
|
|
public static bool DuplicateHandle<THandle, TAccess>(THandle hSourceHandle, out THandle lpTargetHandle, TAccess dwDesiredAccess,
|
|
HPROCESS hSourceProcessHandle = default, HPROCESS hTargetProcessHandle = default, bool bInheritHandle = false, DUPLICATE_HANDLE_OPTIONS dwOptions = 0)
|
|
where THandle : SafeKernelHandle where TAccess : struct, IConvertible
|
|
{
|
|
var ret = Kernel32.DuplicateHandle(hSourceProcessHandle == default ? GetCurrentProcess() : hSourceProcessHandle, hSourceHandle.DangerousGetHandle(),
|
|
hTargetProcessHandle == default ? GetCurrentProcess() : hTargetProcessHandle, out IntPtr h, Convert.ToUInt32(dwDesiredAccess), bInheritHandle, dwOptions);
|
|
lpTargetHandle = (THandle)Activator.CreateInstance(typeof(THandle), h, true);
|
|
return ret;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
protected override bool InternalReleaseHandle() => CloseHandle(handle);
|
|
}
|
|
|
|
/// <summary>Provides a <see cref="SafeHandle"/> to a synchronization object that is automatically disposed using CloseHandle.</summary>
|
|
/// <remarks></remarks>
|
|
public abstract class SafeSyncHandle : SafeKernelHandle, ISyncHandle
|
|
{
|
|
/// <summary>Initializes a new instance of the <see cref="SafeSyncHandle"/> class.</summary>
|
|
protected SafeSyncHandle() : base() { }
|
|
|
|
/// <summary>Initializes a new instance of the <see cref="SafeSyncHandle"/> class and assigns an existing handle.</summary>
|
|
/// <param name="preexistingHandle">An <see cref="IntPtr"/> object that represents the pre-existing handle to use.</param>
|
|
/// <param name="ownsHandle">
|
|
/// <see langword="true"/> to reliably release the handle during the finalization phase; otherwise, <see langword="false"/> (not recommended).
|
|
/// </param>
|
|
protected SafeSyncHandle(IntPtr preexistingHandle, bool ownsHandle = true) : base(preexistingHandle, ownsHandle) { }
|
|
|
|
/// <summary>Performs an implicit conversion from <see cref="SafeSyncHandle"/> to <see cref="SafeWaitHandle"/>.</summary>
|
|
/// <param name="h">The SafeSyncHandle instance.</param>
|
|
/// <returns>The result of the conversion.</returns>
|
|
public static implicit operator SafeWaitHandle(SafeSyncHandle h) => new SafeWaitHandle(h.handle, false);
|
|
}
|
|
}
|
|
} |