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/* A posix_memalign() function that works around platform bugs.
Copyright (C) 2020-2025 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <stdlib.h>
#include <errno.h>
#include <stdckdint.h>
int
posix_memalign (void **memptr, size_t alignment, size_t size)
#undef posix_memalign
{
/* Round SIZE up to the next multiple of ALIGNMENT.
However, treat a zero size as if it were ALIGNMENT. */
size_t aligned_size;
if (ckd_add (&aligned_size, size, alignment - !!size))
return ENOMEM;
aligned_size &= -alignment;
return posix_memalign (memptr, alignment, aligned_size);
}
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