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//
// 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) 2008-2018 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_PHYSICS_COMMON_TMPMEM
#define PX_PHYSICS_COMMON_TMPMEM
#include "CmPhysXCommon.h"
#include "PsAllocator.h"
namespace physx
{
namespace Cm
{
// dsequeira: we should be able to use PX_ALLOCA or Ps::InlineArray for this, but both seem slightly flawed:
//
// PX_ALLOCA has non-configurable fallback threshold and uses _alloca, which means the allocation is necessarily
// function-scope rather than block-scope (sometimes useful, mostly not.)
//
// Ps::InlineArray touches all memory on resize (a general flaw in the array class which badly needs fixing)
//
// Todo: fix both the above issues.
template<typename T, PxU32 stackLimit>
class TmpMem
{
public:
PX_FORCE_INLINE TmpMem(PxU32 size):
mPtr(size<=stackLimit?mStackBuf : reinterpret_cast<T*>(PX_ALLOC(size*sizeof(T), "char")))
{
}
PX_FORCE_INLINE ~TmpMem()
{
if(mPtr!=mStackBuf)
PX_FREE(mPtr);
}
PX_FORCE_INLINE T& operator*() const
{
return *mPtr;
}
PX_FORCE_INLINE T* operator->() const
{
return mPtr;
}
PX_FORCE_INLINE T& operator[](PxU32 index)
{
return mPtr[index];
}
T* getBase()
{
return mPtr;
}
private:
T mStackBuf[stackLimit];
T* mPtr;
};
}
}
#endif
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