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