36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/* A posix_memalign() function that works around platform bugs.
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Copyright (C) 2020-2022 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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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 up SIZE to the next multiple of ALIGNMENT, namely
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(SIZE + ALIGNMENT - 1) & ~(ALIGNMENT - 1). */
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size += alignment - 1;
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if (size >= alignment - 1) /* no overflow? */
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return posix_memalign (memptr, alignment, size & ~(size_t)(alignment - 1));
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else
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return ENOMEM;
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}
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