79 lines
1.7 KiB
C++
79 lines
1.7 KiB
C++
/* SPDX-FileCopyrightText: 2006-2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup intern_memutil
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*/
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#ifndef __MEM_ALLOCATOR_H__
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#define __MEM_ALLOCATOR_H__
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#include "guardedalloc/MEM_guardedalloc.h"
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#include <cstddef>
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template<typename _Tp> struct MEM_Allocator {
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using size_type = size_t;
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using difference_type = ptrdiff_t;
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using pointer = _Tp *;
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using const_pointer = const _Tp *;
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using reference = _Tp &;
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using const_reference = const _Tp &;
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using value_type = _Tp;
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template<typename _Tp1> struct rebind {
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using other = MEM_Allocator<_Tp1>;
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};
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MEM_Allocator() noexcept = default;
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MEM_Allocator(const MEM_Allocator & /*other*/) noexcept = default;
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template<typename _Tp1> MEM_Allocator(const MEM_Allocator<_Tp1> /*other*/) noexcept {}
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~MEM_Allocator() noexcept = default;
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pointer address(reference __x) const
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{
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return &__x;
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}
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const_pointer address(const_reference __x) const
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{
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return &__x;
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}
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/* NOTE: `__n` is permitted to be 0.
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* The C++ standard says nothing about what the return value is when `__n == 0`. */
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_Tp *allocate(size_type __n, const void * /*unused*/ = nullptr)
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{
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_Tp *__ret = NULL;
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if (__n) {
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__ret = static_cast<_Tp *>(MEM_mallocN(__n * sizeof(_Tp), "STL MEM_Allocator"));
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}
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return __ret;
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}
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// __p is not permitted to be a null pointer.
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void deallocate(pointer __p, size_type /*unused*/)
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{
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MEM_freeN(__p);
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}
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size_type max_size() const noexcept
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{
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return size_t(-1) / sizeof(_Tp);
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}
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void construct(pointer __p, const _Tp &__val)
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{
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new (__p) _Tp(__val);
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}
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void destroy(pointer __p)
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{
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__p->~_Tp();
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}
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};
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#endif // __MEM_ALLOCATOR_H__
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