aligned_malloc.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2020, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include "core-precomp.h"  // Precompiled headers

#include <mrpt/core/aligned_allocator.h>
#include <cstdlib>  // free, realloc, C++17 aligned_alloc
#include <cstring>  // memset

void* mrpt::aligned_calloc(size_t bytes, size_t alignment)
{
    void* ptr = mrpt::aligned_malloc(bytes, alignment);
    if (ptr) ::memset(ptr, 0, bytes);
    return ptr;
}
void* mrpt::aligned_malloc(size_t size, size_t alignment)
{
    // size must be an integral multiple of alignment:
    if (alignment != 0 && (size % alignment) != 0)
        size = ((size / alignment) + 1) * alignment;
#ifdef _MSC_VER
    return _aligned_malloc(size, alignment);
#elif __APPLE__
    void* p;
    if (::posix_memalign(&p, alignment, size) != 0)
    {
        p = 0;
    }
    return p;
#else
    return ::aligned_alloc(alignment, size);
#endif
}
void mrpt::aligned_free(void* ptr)
{
#ifdef _MSC_VER
    return _aligned_free(ptr);
#else
    return ::free(ptr);
#endif
}
void* mrpt::aligned_realloc(void* ptr, size_t size, size_t alignment)
{
    // size must be an integral multiple of alignment:
    if ((size % alignment) != 0) size = ((size / alignment) + 1) * alignment;
#ifdef _MSC_VER
    return _aligned_realloc(ptr, size, alignment);
#else
    return std::realloc(ptr, size);
#endif
}