GRK/dependencies/physx-4.1/source/foundation/include/PsSList.h
secret_dude a7bd7ecb75 master
2022-01-12 16:07:16 +01:00

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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) 2008-2019 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_PSSLIST_H
#define PSFOUNDATION_PSSLIST_H
#include "foundation/Px.h"
#include "foundation/PxAssert.h"
#include "PsAlignedMalloc.h"
#if PX_P64_FAMILY
#define PX_SLIST_ALIGNMENT 16
#else
#define PX_SLIST_ALIGNMENT 8
#endif
namespace physx
{
namespace shdfnd
{
#if PX_VC
#pragma warning(push)
#pragma warning(disable : 4324) // Padding was added at the end of a structure because of a __declspec(align) value.
#endif
#if !PX_GCC_FAMILY
__declspec(align(PX_SLIST_ALIGNMENT))
#endif
class SListEntry
{
friend struct SListImpl;
public:
SListEntry() : mNext(NULL)
{
PX_ASSERT((size_t(this) & (PX_SLIST_ALIGNMENT - 1)) == 0);
}
// Only use on elements returned by SList::flush()
// because the operation is not atomic.
SListEntry* next()
{
return mNext;
}
private:
SListEntry* mNext;
}
#if PX_GCC_FAMILY
__attribute__((aligned(PX_SLIST_ALIGNMENT)));
#else
;
#endif
#if PX_VC
#pragma warning(pop)
#endif
// template-less implementation
struct PX_FOUNDATION_API SListImpl
{
SListImpl();
~SListImpl();
void push(SListEntry* entry);
SListEntry* pop();
SListEntry* flush();
static uint32_t getSize();
};
template <typename Alloc = ReflectionAllocator<SListImpl> >
class SListT : protected Alloc
{
public:
SListT(const Alloc& alloc = Alloc()) : Alloc(alloc)
{
mImpl = reinterpret_cast<SListImpl*>(Alloc::allocate(SListImpl::getSize(), __FILE__, __LINE__));
PX_ASSERT((size_t(mImpl) & (PX_SLIST_ALIGNMENT - 1)) == 0);
PX_PLACEMENT_NEW(mImpl, SListImpl)();
}
~SListT()
{
mImpl->~SListImpl();
Alloc::deallocate(mImpl);
}
// pushes a new element to the list
void push(SListEntry& entry)
{
mImpl->push(&entry);
}
// pops an element from the list
SListEntry* pop()
{
return mImpl->pop();
}
// removes all items from list, returns pointer to first element
SListEntry* flush()
{
return mImpl->flush();
}
private:
SListImpl* mImpl;
};
typedef SListT<> SList;
} // namespace shdfnd
} // namespace physx
#endif // #ifndef PSFOUNDATION_PSSLIST_H