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/*
* Simd Library (http://ermig1979.github.io/Simd).
*
* Copyright (c) 2011-2020 Yermalayeu Ihar.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __SimdAllocator_hpp__
#define __SimdAllocator_hpp__
#include "Simd/SimdLib.h"
#include <memory>
namespace Simd
{
/*! @ingroup cpp_allocator
\short Aligned memory allocator.
Performs allocation and deletion of aligned memory.
\note Also it can be used as an allocator for STL containers.
*/
template <class T> struct Allocator
{
/*!
\fn void * Allocate(size_t size, size_t align);
\short Allocates aligned memory block.
\note The memory allocated by this function is must be deleted by function Simd::Allocator::Free.
\param [in] size - a size of required memory block.
\param [in] align - an align of allocated memory address.
\return a pointer to allocated memory.
*/
static SIMD_INLINE void * Allocate(size_t size, size_t align)
{
#ifdef __SimdMemory_h__
return Simd::Allocate(size, align);
#else
return SimdAllocate(size, align);
#endif
}
/*!
\fn void Free(void * ptr);
\short Frees aligned memory block.
\note This function frees a memory allocated by function Simd::Allocator::Allocate.
\param [in] ptr - a pointer to the memory to be deleted.
*/
static SIMD_INLINE void Free(void * ptr)
{
#ifdef __SimdMemory_h__
Simd::Free(ptr);
#else
SimdFree(ptr);
#endif
}
/*!
\fn size_t Align(size_t size, size_t align);
\short Gets aligned size.
\param [in] size - an original size.
\param [in] align - a required alignment.
\return an aligned size.
*/
static SIMD_INLINE size_t Align(size_t size, size_t align)
{
#ifdef __SimdMemory_h__
return Simd::AlignHi(size, align);
#else
return SimdAlign(size, align);
#endif
}
/*!
\fn void * Align(void * ptr, size_t align);
\short Gets aligned address.
\param [in] ptr - an original pointer.
\param [in] align - a required alignment.
\return an aligned address.
*/
static SIMD_INLINE void * Align(void * ptr, size_t align)
{
#ifdef __SimdMemory_h__
return Simd::AlignHi(ptr, align);
#else
return (void *)SimdAlign((size_t)ptr, align);
#endif
}
/*!
\fn size_t Alignment();
\short Gets memory alignment required for the most productive work.
\return a required memory alignment.
*/
static SIMD_INLINE size_t Alignment()
{
#if defined(__SimdAlignment_h__) && defined(_WIN32)
return Simd::Alignment();
#else
return SimdAlignment();
#endif
}
//---------------------------------------------------------------------
// STL allocator interface implementation:
typedef T value_type;
typedef T * pointer;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
typedef T & reference;
typedef const T & const_reference;
typedef const T * const_pointer;
template <typename U>
struct rebind
{
typedef Allocator<U> other;
};
SIMD_INLINE Allocator()
{
}
template <typename U> SIMD_INLINE Allocator(const Allocator<U> & /*a*/)
{
}
SIMD_INLINE const_pointer address(const_reference value) const
{
#if defined(SIMD_CPP_2011_ENABLE)
return std::addressof(value);
#else
return (reinterpret_cast<const_pointer>(&const_cast<char&>(reinterpret_cast<const volatile char&>(value))));
#endif
}
SIMD_INLINE pointer address(reference value) const
{
#if defined(SIMD_CPP_2011_ENABLE)
return std::addressof(value);
#else
return (reinterpret_cast<pointer>(&const_cast<char&>(reinterpret_cast<const volatile char&>(value))));
#endif
}
SIMD_INLINE pointer allocate(size_type size, const void * /*ptr*/ = NULL)
{
return static_cast<pointer>(Allocate(size * sizeof(T), Alignment()));
}
SIMD_INLINE size_type max_size() const
{
return ~static_cast<std::size_t>(0) / sizeof(T);
}
SIMD_INLINE void deallocate(pointer ptr, size_type /*size*/)
{
Free(ptr);
}
template<class U, class V> SIMD_INLINE void construct(U * ptr, const V & value)
{
::new((void*)ptr) U(value);
}
#if defined(SIMD_CPP_2011_ENABLE)
template<class U, class... Args> SIMD_INLINE void construct(U * ptr, Args &&... args)
{
::new((void*)ptr) U(std::forward<Args>(args)...);
}
#endif
template<class U> SIMD_INLINE void construct(U * ptr)
{
::new((void*)ptr) U();
}
template<class U> SIMD_INLINE void destroy(U * ptr)
{
ptr->~U();
}
};
template<typename T1, typename T2> SIMD_INLINE bool operator == (const Allocator<T1> & /*a1*/, const Allocator<T2> & /*a2*/)
{
return true;
}
template<typename T1, typename T2> SIMD_INLINE bool operator != (const Allocator<T1> & /*a1*/, const Allocator<T2> & /*a2*/)
{
return false;
}
}
#endif//__SimdAllocator_hpp__
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