Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 128 insertions, 0 deletions

diff --git a/PhysX_3.4/Source/LowLevelDynamics/src/DyFrictionPatchStreamPair.h b/PhysX_3.4/Source/LowLevelDynamics/src/DyFrictionPatchStreamPair.h
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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2016 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
+
+
+
+#ifndef PXC_FRICTIONPATCHPOOL_H
+#define PXC_FRICTIONPATCHPOOL_H
+
+#include "foundation/PxSimpleTypes.h"
+#include "PxvConfig.h"
+#include "PsMutex.h"
+#include "PsArray.h"
+
+// Each narrow phase thread has an input stream of friction patches from the
+// previous frame and an output stream of friction patches which will be
+// saved for next frame. The patches persist for exactly one frame at which
+// point they get thrown away.
+
+
+// There is a stream pair per thread. A contact callback reserves space
+// for its friction patches and gets a cookie in return that can stash
+// for next frame. Cookies are valid for one frame only.
+//
+// note that all friction patches reserved are guaranteed to be contiguous;
+// this might turn out to be a bit inefficient if we often have a large
+// number of friction patches
+
+#include "PxcNpMemBlockPool.h"
+
+namespace physx
+{
+
+class FrictionPatchStreamPair
+{
+public:
+	FrictionPatchStreamPair(PxcNpMemBlockPool& blockPool);
+
+	// reserve can fail and return null. Read should never fail
+	template<class FrictionPatch>
+	FrictionPatch*		reserve(const PxU32 size);
+
+	template<class FrictionPatch>
+	const FrictionPatch* findInputPatches(const PxU8* ptr) const;
+	void					reset();
+
+	PxcNpMemBlockPool& getBlockPool() { return mBlockPool;}
+private:
+	PxcNpMemBlockPool&	mBlockPool;
+	PxcNpMemBlock*		mBlock;
+	PxU32				mUsed;
+
+	FrictionPatchStreamPair& operator=(const FrictionPatchStreamPair&);
+};
+
+PX_FORCE_INLINE FrictionPatchStreamPair::FrictionPatchStreamPair(PxcNpMemBlockPool& blockPool):
+  mBlockPool(blockPool), mBlock(NULL), mUsed(0)
+{
+}
+
+PX_FORCE_INLINE void FrictionPatchStreamPair::reset()
+{
+	mBlock = NULL;
+	mUsed = 0;
+}
+
+// reserve can fail and return null. Read should never fail
+template <class FrictionPatch>
+FrictionPatch* FrictionPatchStreamPair::reserve(const PxU32 size)
+{
+	if(size>PxcNpMemBlock::SIZE)
+	{
+		return reinterpret_cast<FrictionPatch*>(-1);
+	}
+
+	PX_ASSERT(size <= PxcNpMemBlock::SIZE);
+
+	FrictionPatch* ptr = NULL;
+
+	if(mBlock == NULL || mUsed + size > PxcNpMemBlock::SIZE)
+	{
+		mBlock = mBlockPool.acquireFrictionBlock();
+		mUsed = 0;
+	}
+
+	if(mBlock)
+	{
+		ptr = reinterpret_cast<FrictionPatch*>(mBlock->data+mUsed);
+		mUsed += size;
+	}
+
+	return ptr;
+}
+
+template <class FrictionPatch>
+const FrictionPatch* FrictionPatchStreamPair::findInputPatches(const PxU8* ptr) const
+{
+	return reinterpret_cast<const FrictionPatch*>(ptr);
+}
+
+}
+
+#endif