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// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
// proprietary rights in and to this software and related documentation and
// any modifications thereto. Any use, reproduction, disclosure, or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA Corporation is strictly prohibited.
//
// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
//
// Information and code furnished is believed to be accurate and reliable.
// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright (c) 2008-2020 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 PSFOUNDATION_PSSORT_H
#define PSFOUNDATION_PSSORT_H
/** \addtogroup foundation
@{
*/
#include "PsSortInternals.h"
#include "PsAlloca.h"
#define PX_SORT_PARANOIA PX_DEBUG
/**
\brief Sorts an array of objects in ascending order, assuming
that the predicate implements the < operator:
\see Less, Greater
*/
#if PX_VC
#pragma warning(push)
#pragma warning(disable : 4706) // disable the warning that we did an assignment within a conditional expression, as
// this was intentional.
#endif
/** \brief NVidia namespace */
namespace nv
{
/** \brief nvcloth namespace */
namespace cloth
{
namespace ps
{
template <class T, class Predicate, class Allocator>
void sort(T* elements, uint32_t count, const Predicate& compare, const Allocator& inAllocator,
const uint32_t initialStackSize = 32)
{
static const uint32_t SMALL_SORT_CUTOFF = 5; // must be >= 3 since we need 3 for median
PX_ALLOCA(stackMem, int32_t, initialStackSize);
internal::Stack<Allocator> stack(stackMem, initialStackSize, inAllocator);
int32_t first = 0, last = int32_t(count - 1);
if(last > first)
{
for(;;)
{
while(last > first)
{
NV_CLOTH_ASSERT(first >= 0 && last < int32_t(count));
if(uint32_t(last - first) < SMALL_SORT_CUTOFF)
{
internal::smallSort(elements, first, last, compare);
break;
}
else
{
const int32_t partIndex = internal::partition(elements, first, last, compare);
// push smaller sublist to minimize stack usage
if((partIndex - first) < (last - partIndex))
{
stack.push(first, partIndex - 1);
first = partIndex + 1;
}
else
{
stack.push(partIndex + 1, last);
last = partIndex - 1;
}
}
}
if(stack.empty())
break;
stack.pop(first, last);
}
}
#if PX_SORT_PARANOIA
for(uint32_t i = 1; i < count; i++)
NV_CLOTH_ASSERT(!compare(elements[i], elements[i - 1]));
#endif
}
template <class T, class Predicate>
void sort(T* elements, uint32_t count, const Predicate& compare)
{
sort(elements, count, compare, typename ps::AllocatorTraits<T>::Type());
}
template <class T>
void sort(T* elements, uint32_t count)
{
sort(elements, count, ps::Less<T>(), typename ps::AllocatorTraits<T>::Type());
}
} // namespace ps
} // namespace cloth
} // namespace nv
#if PX_VC
#pragma warning(pop)
#endif
#endif // #ifndef PSFOUNDATION_PSSORT_H
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