//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//  * Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//  * Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//  * Neither the name of NVIDIA CORPORATION nor the names of its
//    contributors may be used to endorse or promote products derived
//    from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2018 NVIDIA Corporation. All rights reserved.



#ifdef WIN32
#include "ModuleUpdateLoader.h"

typedef HMODULE (GetUpdatedModule_FUNC)(const char*, const char*);

ModuleUpdateLoader::ModuleUpdateLoader(const char* updateLoaderDllName)
	: mGetUpdatedModuleFunc(NULL)
{
	mUpdateLoaderDllHandle = LoadLibrary(updateLoaderDllName);

	if (mUpdateLoaderDllHandle != NULL)
	{
		mGetUpdatedModuleFunc = GetProcAddress(mUpdateLoaderDllHandle, "GetUpdatedModule");
	}
}

ModuleUpdateLoader::~ModuleUpdateLoader()
{
	if (mUpdateLoaderDllHandle != NULL)
	{
		FreeLibrary(mUpdateLoaderDllHandle);
		mUpdateLoaderDllHandle = NULL;
	}
}

HMODULE ModuleUpdateLoader::loadModule(const char* moduleName, const char* appGuid)
{
	HMODULE result = NULL;

	if (mGetUpdatedModuleFunc != NULL)
	{
		// Try to get the module through PhysXUpdateLoader
		GetUpdatedModule_FUNC* getUpdatedModuleFunc = (GetUpdatedModule_FUNC*)mGetUpdatedModuleFunc;
		result = getUpdatedModuleFunc(moduleName, appGuid);
	}
	else
	{
		// If no PhysXUpdateLoader, just load the DLL directly
		result = LoadLibrary(moduleName);
	}

	return result;
}


#endif	// WIN32