//
// 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) 2008-2019 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  


#include "NpReadCheck.h"

#include "NpScene.h"

using namespace physx;

NpReadCheck::NpReadCheck(const NpScene* scene, const char* functionName)
	: mScene(scene), mName(functionName), mErrorCount(0)
{
	if (mScene)
	{
		if (!mScene->startRead())
		{
			if (mScene->getScene().getFlags() & PxSceneFlag::eREQUIRE_RW_LOCK)
			{
				Ps::getFoundation().error(PxErrorCode::eINVALID_OPERATION, __FILE__, __LINE__, 
					"An API read call (%s) was made from thread %d but PxScene::lockRead() was not called first, note that "
					"when PxSceneFlag::eREQUIRE_RW_LOCK is enabled all API reads and writes must be "
					"wrapped in the appropriate locks.", mName, PxU32(Ps::Thread::getId()));
			}
			else
			{
				Ps::getFoundation().error(PxErrorCode::eINVALID_OPERATION, __FILE__, __LINE__, 
					"Overlapping API read and write call detected during %s from thread %d! Note that read operations to "
					"the SDK must not be overlapped with write calls, else the resulting behavior is undefined.", mName, PxU32(Ps::Thread::getId()));
			}
		}

		// Record the NpScene read/write error counter which is
		// incremented any time a NpScene::startWrite/startRead fails
		// (see destructor for additional error checking based on this count)
		mErrorCount = mScene->getReadWriteErrorCount();
	}
}


NpReadCheck::~NpReadCheck()
{
	if (mScene)
	{
		// By checking if the NpScene::mConcurrentErrorCount has been incremented
		// we can detect if an erroneous read/write was performed during 
		// this objects lifetime. In this case we also print this function's
		// details so that the user can see which two API calls overlapped
		if (mScene->getReadWriteErrorCount() != mErrorCount && !(mScene->getScene().getFlags() & PxSceneFlag::eREQUIRE_RW_LOCK))
		{
			Ps::getFoundation().error(PxErrorCode::eINVALID_OPERATION, __FILE__, __LINE__, 
				"Leaving %s on thread %d, an API overlapping write on another thread was detected.", mName, PxU32(Ps::Thread::getId()));
		}

		mScene->stopRead();
	}
}