SnXmlMemoryAllocator.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 SN_XML_MEMORY_ALLOCATOR_H
#define SN_XML_MEMORY_ALLOCATOR_H
 
#include "foundation/PxSimpleTypes.h"
 
namespace physx { 
 
    class XmlMemoryAllocator
    {
    protected:
        virtual ~XmlMemoryAllocator(){}
    public:
        virtual PxU8* allocate(PxU32 inSize) = 0;
        virtual void deallocate( PxU8* inMem ) = 0;
        virtual PxAllocatorCallback& getAllocator() = 0;
        template<typename TObjectType>
        TObjectType* allocate()
        {
            TObjectType* retval = reinterpret_cast< TObjectType* >( allocate( sizeof( TObjectType ) ) );
            new (retval) TObjectType();
            return retval;
        }
 
        template<typename TObjectType, typename TArgType>
        TObjectType* allocate(const TArgType &arg)
        {
            TObjectType* retval = reinterpret_cast< TObjectType* >( allocate( sizeof( TObjectType ) ) );
            new (retval) TObjectType(arg);
            return retval;
        }
 
        template<typename TObjectType>
        void deallocate( TObjectType* inObject )
        {
            deallocate( reinterpret_cast<PxU8*>( inObject ) );
        }
        template<typename TObjectType>
        inline TObjectType* batchAllocate(PxU32 inCount )
        {
            TObjectType* retval = reinterpret_cast<TObjectType*>( allocate( sizeof(TObjectType) * inCount ) );
            for ( PxU32 idx = 0; idx < inCount; ++idx )
            {
                new (retval + idx) TObjectType();
            }
            return retval;
        }
 
        template<typename TObjectType, typename TArgType>
        inline TObjectType* batchAllocate(PxU32 inCount, const TArgType &arg)
        {
            TObjectType* retval = reinterpret_cast<TObjectType*>( allocate( sizeof(TObjectType) * inCount ) );
            for ( PxU32 idx = 0; idx < inCount; ++idx )
            {
                new (retval + idx) TObjectType(arg);
            }
            return retval;
        }
 
 
        //Duplicate function definition for gcc.
        template<typename TObjectType>
        inline TObjectType* batchAllocate(TObjectType*, PxU32 inCount )
        {
            TObjectType* retval = reinterpret_cast<TObjectType*>( allocate( sizeof(TObjectType) * inCount ) );
            for ( PxU32 idx = 0; idx < inCount; ++idx )
            {
                new (retval + idx) TObjectType();
            }
            return retval;
        }
    };
    
    struct XmlMemoryAllocatorImpl : public XmlMemoryAllocator
    {
        Sn::TMemoryPoolManager mManager;
 
        XmlMemoryAllocatorImpl( PxAllocatorCallback& inAllocator )
            : mManager( inAllocator )
        {
        }
        XmlMemoryAllocatorImpl &operator=(const XmlMemoryAllocatorImpl &);
        virtual PxAllocatorCallback& getAllocator()
        {
            return mManager.getWrapper().getAllocator();
        }
        
        virtual PxU8* allocate(PxU32 inSize )
        {
            if ( !inSize )
                return NULL;
 
            return mManager.allocate( inSize );
        }
        virtual void deallocate( PxU8* inMem )
        {
            if ( inMem )
                mManager.deallocate( inMem );
        }
    };
}
#endif