mirror of
https://github.com/SimoneN64/Kaizen.git
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83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
/* Copyright (c) 2017-2023 Hans-Kristian Arntzen
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "aligned_alloc.hpp"
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _WIN32
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#include <malloc.h>
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#endif
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namespace Util
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{
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void *memalign_alloc(size_t boundary, size_t size)
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{
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#if defined(_WIN32)
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return _aligned_malloc(size, boundary);
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#elif defined(_ISOC11_SOURCE)
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return aligned_alloc(boundary, (size + boundary - 1) & ~(boundary - 1));
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#elif (_POSIX_C_SOURCE >= 200112L) || (_XOPEN_SOURCE >= 600)
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void *ptr = nullptr;
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if (posix_memalign(&ptr, boundary, size) < 0)
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return nullptr;
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return ptr;
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#else
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// Align stuff ourselves. Kinda ugly, but will work anywhere.
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void **place;
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uintptr_t addr = 0;
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void *ptr = malloc(boundary + size + sizeof(uintptr_t));
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if (ptr == nullptr)
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return nullptr;
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addr = ((uintptr_t)ptr + sizeof(uintptr_t) + boundary) & ~(boundary - 1);
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place = (void **) addr;
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place[-1] = ptr;
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return (void *) addr;
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#endif
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}
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void *memalign_calloc(size_t boundary, size_t size)
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{
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void *ret = memalign_alloc(boundary, size);
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if (ret)
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memset(ret, 0, size);
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return ret;
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}
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void memalign_free(void *ptr)
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{
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#if defined(_WIN32)
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_aligned_free(ptr);
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#elif !defined(_ISOC11_SOURCE) && !((_POSIX_C_SOURCE >= 200112L) || (_XOPEN_SOURCE >= 600))
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if (ptr != nullptr)
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{
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void **p = (void **) ptr;
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free(p[-1]);
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}
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#else
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free(ptr);
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#endif
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}
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}
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