Support for XISF
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// ____ ______ __
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// / __ \ / ____// /
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// / /_/ // / / /
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// / ____// /___ / /___ PixInsight Class Library
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// /_/ \____//_____/ PCL 2.4.23
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// ----------------------------------------------------------------------------
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// pcl/AlignedAllocator.h - Released 2022-03-12T18:59:29Z
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// ----------------------------------------------------------------------------
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// This file is part of the PixInsight Class Library (PCL).
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// PCL is a multiplatform C++ framework for development of PixInsight modules.
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//
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// Copyright (c) 2003-2022 Pleiades Astrophoto S.L. All Rights Reserved.
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//
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// Redistribution and use in both source and binary forms, with or without
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// modification, is permitted provided that the following conditions are met:
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//
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// 1. All 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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//
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// 2. All 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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//
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// 3. Neither the names "PixInsight" and "Pleiades Astrophoto", nor the names
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// of their contributors, may be used to endorse or promote products derived
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// from this software without specific prior written permission. For written
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// permission, please contact info@pixinsight.com.
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//
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// 4. All products derived from this software, in any form whatsoever, must
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// reproduce the following acknowledgment in the end-user documentation
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// and/or other materials provided with the product:
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//
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// "This product is based on software from the PixInsight project, developed
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// by Pleiades Astrophoto and its contributors (https://pixinsight.com/)."
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//
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// Alternatively, if that is where third-party acknowledgments normally
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// appear, this acknowledgment must be reproduced in the product itself.
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//
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// THIS SOFTWARE IS PROVIDED BY PLEIADES ASTROPHOTO AND ITS CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PLEIADES ASTROPHOTO OR ITS
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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, BUSINESS
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// INTERRUPTION; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; AND LOSS OF USE,
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// DATA OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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// ----------------------------------------------------------------------------
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#ifndef __PCL_AlignedAllocator_h
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#define __PCL_AlignedAllocator_h
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/// \file pcl/AlignedAllocator.h
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#include <pcl/Defs.h>
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#include <pcl/Diagnostics.h>
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#include <pcl/StandardAllocator.h>
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namespace pcl
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{
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// ----------------------------------------------------------------------------
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/*!
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* \class AlignedAllocator
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* \brief A block allocator class for aligned memory allocation/deallocation.
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*
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* %AlignedAllocator is a <em>block allocator</em> class. It can be used for
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* all PCL container classes instead of the default StandardAllocator class,
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* from which it derives publicly, providing exactly the same memory allocation
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* policies.
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*
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* %AlignedAllocator guarantees that all allocated memory blocks are aligned
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* for optimal performance of SIMD processor instructions on all supported
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* platforms. Currently all blocks are allocated with 32 byte alignment, which
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* is optimal for both SSE and AVX2 load/store instructions.
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*
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* For a complete description of block allocators and their fundamental role in
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* PCL, read the documentation for the Allocator class.
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*
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* \sa Allocator, StandardAllocator
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*/
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class PCL_CLASS AlignedAllocator : public StandardAllocator
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{
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public:
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/*!
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* Constructs an %AlignedAllocator object.
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*
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* \param fastGrowth Whether to enable the fast block size growing policy
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* for this allocator.
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*
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* \param canShrink Whether to enable the block shrinking policy for
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* this allocator.
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*
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* See the IsFastGrowthEnabled() and IsShrinkingEnabled() member functions
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* for more information on block allocation policies.
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*/
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AlignedAllocator( bool fastGrowth = true, bool canShrink = true )
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: StandardAllocator( fastGrowth, canShrink )
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{
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}
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/*!
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* Copy constructor.
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*/
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AlignedAllocator( const AlignedAllocator& ) = default;
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/*!
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* Custom allocation routine. Allocates a contiguous memory block of the
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* specified \a size in bytes with 32-byte alignment, and returns the
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* address of the first byte in the newly allocated block.
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*
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* \note This member function is mandatory for a block allocator to be
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* usable by the Allocator class.
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*
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* \sa DeallocateBlock()
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*/
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void* AllocateBlock( size_type size )
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{
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PCL_PRECONDITION( size != 0 )
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void* p = PCL_ALIGNED_MALLOC( size, 32 );
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if ( unlikely( p == nullptr ) )
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throw std::bad_alloc();
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return PCL_ASSUME_ALIGNED_32( p );
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}
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/*!
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* Custom deallocation routine. Deallocates a previously allocated
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* contiguous memory block that begins at the specified location \a p.
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*
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* \note This member function is mandatory for a block allocator to be
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* usable by the Allocator class.
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*
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* \sa AllocateBlock()
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*/
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void DeallocateBlock( void* p )
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{
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PCL_PRECONDITION( p != nullptr )
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PCL_ALIGNED_FREE( p );
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}
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};
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} // pcl
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// ----------------------------------------------------------------------------
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/*!
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* Placement new operator for class AlignedAllocator. Returns the specified
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* address \a p.
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*/
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inline void* operator new( pcl::size_type, void* p, pcl::AlignedAllocator& )
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{
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PCL_PRECONDITION( p != nullptr )
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return p;
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}
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#ifdef _MSC_VER
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#pragma warning( push )
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#pragma warning( disable: 4100 ) // 'unreferenced formal parameter'
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inline void operator delete( void* p, void*, pcl::AlignedAllocator& )
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{
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PCL_PRECONDITION( p != nullptr )
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}
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#pragma warning( pop )
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#endif // _MSC_VER
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// ----------------------------------------------------------------------------
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#endif // __PCL_AlignedAllocator_h
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// ----------------------------------------------------------------------------
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// EOF pcl/AlignedAllocator.h - Released 2022-03-12T18:59:29Z
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