From 8c4603c73675958efc960fbd4bb599a2909d106a Mon Sep 17 00:00:00 2001
From: Konstantin <const@const.me>
Date: Mon, 16 Jan 2023 14:52:43 +0100
Subject: Source codes

---
 ComLightLib/server/Object.hpp | 139 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 ComLightLib/server/Object.hpp

(limited to 'ComLightLib/server/Object.hpp')

diff --git a/ComLightLib/server/Object.hpp b/ComLightLib/server/Object.hpp
new file mode 100644
index 0000000..d2e3257
--- /dev/null
+++ b/ComLightLib/server/Object.hpp
@@ -0,0 +1,139 @@
+#pragma once
+#include <type_traits>
+#include "../comLightClient.h"
+#include "../utils/typeTraits.hpp"
+#include "../Exception.hpp"
+
+namespace ComLight
+{
+	namespace details
+	{
+		GENERATE_HAS_MEMBER( implQueryInterface );
+		GENERATE_HAS_MEMBER( implAddRef );
+		GENERATE_HAS_MEMBER( implRelease );
+	}
+
+	// Outer class of objects, implements IUnknown methods, also the class factory. The type argument must be your class implementing your interfaces, inherited from ObjectRoot<I>
+	template<class T>
+	class Object : public T
+	{
+	public:
+		Object() = default;
+
+		template<typename ... Args>
+		Object( Args&& ... args ) : T{ std::forward<Args>( args )... } {};
+
+		inline virtual ~Object() override { }
+
+		// Implement IUnknown methods
+		HRESULT COMLIGHTCALL QueryInterface( REFIID riid, void** ppvObject ) override
+		{
+			static_assert( details::has_member_implQueryInterface<T>::value, "Your object class must inherit from ComLight::ObjectRoot" );
+
+			if( nullptr == ppvObject )
+				return E_POINTER;
+
+			if( T::implQueryInterface( riid, ppvObject ) )
+				return S_OK;
+			if( T::queryExtraInterfaces( riid, ppvObject ) )
+				return S_OK;
+
+			if( riid == IUnknown::iid() )
+			{
+				ComLight::IUnknown* unk = T::getUnknown();
+				unk->AddRef();
+				*ppvObject = unk;
+				return S_OK;
+			}
+
+			return E_NOINTERFACE;
+		}
+
+		uint32_t COMLIGHTCALL AddRef() override
+		{
+			static_assert( details::has_member_implAddRef<T>::value, "Your object class must inherit from ComLight::ObjectRoot" );
+			return T::implAddRef();
+		}
+
+		uint32_t COMLIGHTCALL Release() override
+		{
+			static_assert( details::has_member_implRelease<T>::value, "Your object class must inherit from ComLight::ObjectRoot" );
+			const uint32_t ret = T::implRelease();
+			if( 0 == ret )
+			{
+				T::FinalRelease();
+				delete this;
+			}
+			return ret;
+		}
+
+		// Create a new object on the heap, store in smart pointer
+		static inline HRESULT create( CComPtr<Object<T>>& result )
+		{
+			CComPtr<Object<T>> ptr;
+			try
+			{
+				ptr = new Object<T>();	// The RefCounter constructor creates it with ref.counter 0. But then CComPtr constructor calls AddRef so we have RC=1 after this line.
+
+				HRESULT hr = ptr->internalFinalConstruct();
+				if( FAILED( hr ) )
+					return hr;
+
+				hr = ptr->FinalConstruct();
+				if( FAILED( hr ) )
+					return hr;
+
+				ptr.swap( result );
+				return S_OK;
+			}
+			catch( const Exception& ex )
+			{
+				return ex.code();
+			}
+		}
+
+		// Create a new object on the heap, store in smart pointer
+		template<typename ... Args>
+		static inline HRESULT create( CComPtr<Object<T>>& result, Args&& ... args )
+		{
+			CComPtr<Object<T>> ptr;
+			try
+			{
+				ptr = new Object<T>( std::forward<Args>( args )... );
+
+				HRESULT hr = ptr->internalFinalConstruct();
+				if( FAILED( hr ) )
+					return hr;
+
+				hr = ptr->FinalConstruct();
+				if( FAILED( hr ) )
+					return hr;
+
+				ptr.swap( result );
+				return S_OK;
+			}
+			catch( const Exception& ex )
+			{
+				return ex.code();
+			}
+			catch( HRESULT hr )
+			{
+				return hr;
+			}
+		}
+
+		// Create a new object on the heap, return one of it's interfaces. The caller is assumed to take ownership of the new object.
+		template<class I>
+		static inline HRESULT create( I** pp )
+		{
+			if( pp == nullptr )
+				return E_POINTER;
+
+			static_assert( details::pointersAssignable<I, T>(), "Object::create can't cast object to the requested interface" );
+			CComPtr<Object<T>> ptr;
+			CHECK( create( ptr ) );
+			ptr.detach( pp );
+			return S_OK;
+		}
+	};
+}
\ No newline at end of file
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