physxCAPI/physxCDLL/include/extensions/PxDefaultAllocator.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) 2008-2023 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 PX_DEFAULT_ALLOCATOR_H
#define PX_DEFAULT_ALLOCATOR_H
/** \addtogroup extensions
  @{
*/

#include "foundation/PxAllocatorCallback.h"
#include "foundation/PxAssert.h"
#include "common/PxPhysXCommonConfig.h"

#include <stdlib.h>

#if PX_WINDOWS_FAMILY || PX_LINUX_FAMILY || PX_SWITCH
#include <malloc.h>
#endif

#if !PX_DOXYGEN
namespace physx
{
#endif

#if PX_WINDOWS_FAMILY
// on win32 we only have 8-byte alignment guaranteed, but the CRT provides special aligned allocation fns
PX_FORCE_INLINE void* platformAlignedAlloc(size_t size)
{
	return _aligned_malloc(size, 16);
}

PX_FORCE_INLINE void platformAlignedFree(void* ptr)
{
	_aligned_free(ptr);
}
#elif PX_LINUX_FAMILY || PX_SWITCH
PX_FORCE_INLINE void* platformAlignedAlloc(size_t size)
{
	return ::memalign(16, size);
}

PX_FORCE_INLINE void platformAlignedFree(void* ptr)
{
	::free(ptr);
}
#else
// on all other platforms we get 16-byte alignment by default
PX_FORCE_INLINE void* platformAlignedAlloc(size_t size)
{
	return ::malloc(size);
}

PX_FORCE_INLINE void platformAlignedFree(void* ptr)
{
	::free(ptr);
}
#endif

/**
\brief default implementation of the allocator interface required by the SDK
*/
class PxDefaultAllocator : public PxAllocatorCallback
{
public:
	virtual void* allocate(size_t size, const char*, const char*, int)
	{
		void* ptr = platformAlignedAlloc(size);
		PX_ASSERT((size_t(ptr) & 15)==0);
		return ptr;
	}

	virtual void deallocate(void* ptr)
	{
		platformAlignedFree(ptr);
	}
};

#if !PX_DOXYGEN
} // namespace physx
#endif

/** @} */
#endif