95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of NVIDIA CORPORATION nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Copyright (c) 2008-2019 NVIDIA Corporation. All rights reserved.
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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
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#ifndef PX_PHYSICS_COMMON_TMPMEM
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#define PX_PHYSICS_COMMON_TMPMEM
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#include "CmPhysXCommon.h"
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#include "PsAllocator.h"
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namespace physx
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{
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namespace Cm
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{
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// dsequeira: we should be able to use PX_ALLOCA or Ps::InlineArray for this, but both seem slightly flawed:
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//
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// PX_ALLOCA has non-configurable fallback threshold and uses _alloca, which means the allocation is necessarily
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// function-scope rather than block-scope (sometimes useful, mostly not.)
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//
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// Ps::InlineArray touches all memory on resize (a general flaw in the array class which badly needs fixing)
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//
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// Todo: fix both the above issues.
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template<typename T, PxU32 stackLimit>
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class TmpMem
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{
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public:
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PX_FORCE_INLINE TmpMem(PxU32 size):
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mPtr(size<=stackLimit?mStackBuf : reinterpret_cast<T*>(PX_ALLOC(size*sizeof(T), "char")))
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{
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}
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PX_FORCE_INLINE ~TmpMem()
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{
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if(mPtr!=mStackBuf)
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PX_FREE(mPtr);
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}
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PX_FORCE_INLINE T& operator*() const
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{
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return *mPtr;
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}
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PX_FORCE_INLINE T* operator->() const
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{
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return mPtr;
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}
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PX_FORCE_INLINE T& operator[](PxU32 index)
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{
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return mPtr[index];
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}
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T* getBase()
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{
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return mPtr;
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}
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private:
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T mStackBuf[stackLimit];
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T* mPtr;
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};
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}
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}
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#endif
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