PxcConstraintBlockStream.h

// 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) 2008-2022 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_CONSTRAINT_BLOCK_POOL_H
#define PXC_CONSTRAINT_BLOCK_POOL_H
 
#include "PxvConfig.h"
#include "foundation/PxArray.h"
#include "foundation/PxMutex.h"
#include "PxcNpMemBlockPool.h"
 
namespace physx
{
class PxsConstraintBlockManager
{
public:
    PxsConstraintBlockManager(PxcNpMemBlockPool & blockPool):
        mBlockPool(blockPool)
    {
    }
 
    PX_FORCE_INLINE void reset()
    {
        mBlockPool.releaseConstraintBlocks(mTrackingArray);
    }
 
    PxcNpMemBlockArray  mTrackingArray;
    PxcNpMemBlockPool&  mBlockPool;
 
private:
    PxsConstraintBlockManager& operator=(const PxsConstraintBlockManager&);
};
 
class PxcConstraintBlockStream
{
    PX_NOCOPY(PxcConstraintBlockStream)
public:
    PxcConstraintBlockStream(PxcNpMemBlockPool & blockPool) :
        mBlockPool  (blockPool),
        mBlock      (NULL),
        mUsed       (0)
    {
    }
 
    PX_FORCE_INLINE PxU8*               reserve(PxU32 size, PxsConstraintBlockManager& manager)
                                        {
                                            size = (size+15)&~15;
                                            if(size>PxcNpMemBlock::SIZE)
                                                return mBlockPool.acquireExceptionalConstraintMemory(size);
 
                                            if(mBlock == NULL || size+mUsed>PxcNpMemBlock::SIZE)
                                            {
                                                mBlock = mBlockPool.acquireConstraintBlock(manager.mTrackingArray);
                                                PX_ASSERT(0==mBlock || mBlock->data == reinterpret_cast<PxU8*>(mBlock));
                                                mUsed = size;
                                                return reinterpret_cast<PxU8*>(mBlock);
                                            }
                                            PX_ASSERT(mBlock && mBlock->data == reinterpret_cast<PxU8*>(mBlock));
                                            PxU8* PX_RESTRICT result = mBlock->data+mUsed;
                                            mUsed += size;
                                            return result;
                                        }
 
    PX_FORCE_INLINE void                reset()
                                        {
                                            mBlock = NULL;
                                            mUsed = 0;
                                        }
 
    PX_FORCE_INLINE PxcNpMemBlockPool&  getMemBlockPool()   { return mBlockPool;    }
 
private:
            PxcNpMemBlockPool&          mBlockPool;
            PxcNpMemBlock*              mBlock; // current constraint block
            PxU32                       mUsed;  // number of bytes used in constraint block
            //Tracking peak allocations
            PxU32                       mPeakUsed;
};
 
class PxcContactBlockStream
{
    PX_NOCOPY(PxcContactBlockStream)
public:
    PxcContactBlockStream(PxcNpMemBlockPool & blockPool):
        mBlockPool(blockPool),
        mBlock(NULL),
        mUsed(0)
    {
    }
 
    PX_FORCE_INLINE PxU8*               reserve(PxU32 size)
                                        {
                                            size = (size+15)&~15;
 
                                            if(size>PxcNpMemBlock::SIZE)
                                                return mBlockPool.acquireExceptionalConstraintMemory(size);
 
                                            PX_ASSERT(size <= PxcNpMemBlock::SIZE);
 
                                            if(mBlock == NULL || size+mUsed>PxcNpMemBlock::SIZE)
                                            {
                                                mBlock = mBlockPool.acquireContactBlock();
                                                PX_ASSERT(0==mBlock || mBlock->data == reinterpret_cast<PxU8*>(mBlock));
                                                mUsed = size;
                                                return reinterpret_cast<PxU8*>(mBlock);
                                            }
                                            PX_ASSERT(mBlock && mBlock->data == reinterpret_cast<PxU8*>(mBlock));
                                            PxU8* PX_RESTRICT result = mBlock->data+mUsed;
                                            mUsed += size;
                                            return result;
                                        }
 
    PX_FORCE_INLINE void                reset()
                                        {
                                            mBlock = NULL;
                                            mUsed = 0;
                                        }
 
    PX_FORCE_INLINE PxcNpMemBlockPool&  getMemBlockPool()   { return mBlockPool;    }
 
private:
            PxcNpMemBlockPool&          mBlockPool;
            PxcNpMemBlock*              mBlock; // current constraint block
            PxU32                       mUsed;  // number of bytes used in constraint block
};
 
}
 
#endif