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ComObject.cs
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ComObject.cs
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// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#nullable enable
using System;
using System.Diagnostics.CodeAnalysis;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using SharpGen.Runtime.Diagnostics;
namespace SharpGen.Runtime;
/// <unmanaged>IUnknown</unmanaged>
/// <unmanaged-short>IUnknown</unmanaged-short>
[Guid("00000000-0000-0000-C000-000000000046")]
public class ComObject : CppObject, IUnknown
{
public ComObject(IntPtr nativePtr) : base(nativePtr)
{
}
public static explicit operator ComObject?(IntPtr nativePtr)
{
return nativePtr == IntPtr.Zero ? null : new ComObject(nativePtr);
}
/// <unmanaged>HRESULT IUnknown::QueryInterface([In] const GUID& riid, [Out] void** ppvObject)</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
public unsafe Result QueryInterface(Guid riid, out IntPtr ppvObject)
{
Result __result__;
fixed (void* ppvObject_ = &ppvObject)
__result__ = ((delegate* unmanaged[Stdcall]<IntPtr, void*, void*, int>) this[0U])(NativePointer, &riid, ppvObject_);
return __result__;
}
/// <unmanaged>ULONG IUnknown::AddRef()</unmanaged>
/// <unmanaged-short>IUnknown::AddRef</unmanaged-short>
public unsafe uint AddRef()
{
uint __result__;
__result__ = ((delegate* unmanaged[Stdcall]<IntPtr, uint>) this[1U])(NativePointer);
return __result__;
}
/// <unmanaged>ULONG IUnknown::Release()</unmanaged>
/// <unmanaged-short>IUnknown::Release</unmanaged-short>
public unsafe uint Release()
{
uint __result__;
__result__ = ((delegate* unmanaged[Stdcall]<IntPtr, uint>) this[2U])(NativePointer);
return __result__;
}
/// <summary>
/// Initializes a new instance of the <see cref="ComObject"/> class from a IUnknown object.
/// </summary>
/// <param name="iunknownObject">Reference to a IUnknown object</param>
#if NET6_0_OR_GREATER
[SupportedOSPlatform("windows")]
#endif
public ComObject(object iunknownObject) : base(Marshal.GetIUnknownForObject(iunknownObject))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ComObject"/> class.
/// </summary>
protected ComObject()
{
}
/// <summary>
/// Query instance for a particular COM GUID/interface support.
/// </summary>
/// <param name = "guid">GUID query interface</param>
/// <msdn-id>ms682521</msdn-id>
/// <unmanaged>IUnknown::QueryInterface</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
public virtual IntPtr QueryInterfaceOrNull(Guid guid)
{
QueryInterface(guid, out var pointer);
return pointer;
}
///<summary>
/// Query this instance for a particular COM interface support.
///</summary>
///<typeparam name="T">The type of the COM interface to query</typeparam>
///<returns>An instance of the queried interface</returns>
/// <exception cref="SharpGenException">If this object doesn't support the interface</exception>
/// <msdn-id>ms682521</msdn-id>
/// <unmanaged>IUnknown::QueryInterface</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
public virtual T QueryInterface<
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
#endif
T>() where T : ComObject
{
QueryInterface(typeof(T).GetTypeInfo().GUID, out var parentPtr).CheckError();
return MarshallingHelpers.FromPointer<T>(parentPtr)!;
}
/// <summary>
/// Queries a managed object for a particular COM interface support (This method is a shortcut to <see cref="QueryInterface"/>)
/// </summary>
///<typeparam name="T">The type of the COM interface to query</typeparam>
/// <param name="comObject">The managed COM object.</param>
///<returns>An instance of the queried interface</returns>
/// <msdn-id>ms682521</msdn-id>
/// <unmanaged>IUnknown::QueryInterface</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
#if NET6_0_OR_GREATER
[SupportedOSPlatform("windows")]
#endif
public static T As<
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
#endif
T>(object comObject) where T : ComObject => As<T>(Marshal.GetIUnknownForObject(comObject));
/// <summary>
/// Queries a managed object for a particular COM interface support (This method is a shortcut to <see cref="QueryInterface"/>)
/// </summary>
///<typeparam name="T">The type of the COM interface to query</typeparam>
/// <param name="iunknownPtr">The managed COM object.</param>
///<returns>An instance of the queried interface</returns>
/// <msdn-id>ms682521</msdn-id>
/// <unmanaged>IUnknown::QueryInterface</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
public static T As<
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
#endif
T>(IntPtr iunknownPtr) where T : ComObject
{
using var tempObject = new ComObject(iunknownPtr);
return tempObject.QueryInterface<T>();
}
/// <summary>
/// Queries a managed object for a particular COM interface support.
/// </summary>
///<typeparam name="T">The type of the COM interface to query</typeparam>
/// <param name="comObject">The managed COM object.</param>
///<returns>An instance of the queried interface</returns>
/// <msdn-id>ms682521</msdn-id>
/// <unmanaged>IUnknown::QueryInterface</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
#if NET6_0_OR_GREATER
[SupportedOSPlatform("windows")]
#endif
public static T QueryInterface<
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
#endif
T>(object comObject) where T : ComObject =>
As<T>(Marshal.GetIUnknownForObject(comObject));
/// <summary>
/// Queries a managed object for a particular COM interface support.
/// </summary>
///<typeparam name="T">The type of the COM interface to query</typeparam>
/// <param name="comPointer">A pointer to a COM object.</param>
///<returns>An instance of the queried interface</returns>
/// <msdn-id>ms682521</msdn-id>
/// <unmanaged>IUnknown::QueryInterface</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
public static T? QueryInterfaceOrNull<
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
#endif
T>(IntPtr comPointer) where T : ComObject
{
using var tempObject = new ComObject(comPointer);
return tempObject.QueryInterfaceOrNull<T>();
}
///<summary>
/// Query Interface for a particular interface support.
///</summary>
///<returns>An instance of the queried interface or null if it is not supported</returns>
///<returns></returns>
/// <msdn-id>ms682521</msdn-id>
/// <unmanaged>IUnknown::QueryInterface</unmanaged>
/// <unmanaged-short>IUnknown::QueryInterface</unmanaged-short>
public virtual T? QueryInterfaceOrNull<
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
#endif
T>() where T : ComObject
{
return MarshallingHelpers.FromPointer<T>(QueryInterfaceOrNull(typeof(T).GetTypeInfo().GUID));
}
///<summary>
/// Query Interface for a particular interface support and attach to the given instance.
///</summary>
///<typeparam name="T"></typeparam>
///<returns></returns>
protected void QueryInterfaceFrom<T>(T fromObject) where T : ComObject
{
NativePointer = fromObject.QueryInterfaceOrNull(GetType().GetTypeInfo().GUID);
}
protected override void DisposeCore(IntPtr nativePointer, bool disposing)
{
// Release the object
if (disposing || ObjectTrackerReadOnlyConfiguration.IsReleaseOnFinalizerEnabled)
Release();
}
}