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67 lines
1.8 KiB
67 lines
1.8 KiB
/*****************************************************************************
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* posix_memalign.c: POSIX posix_memalign() replacement
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*****************************************************************************
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* Copyright © 2012 Rémi Denis-Courmont
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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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, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include <errno.h>
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static int check_align (size_t align)
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{
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for (size_t i = sizeof (void *); i != 0; i *= 2)
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if (align == i)
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return 0;
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return EINVAL;
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}
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#if !defined (_WIN32) && !defined (__APPLE__)
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#include <malloc.h>
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int posix_memalign (void **ptr, size_t align, size_t size)
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{
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if (check_align (align))
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return EINVAL;
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int saved_errno = errno;
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void *p = memalign (align, size);
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if (p == NULL)
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{
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errno = saved_errno;
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return ENOMEM;
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}
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*ptr = p;
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return 0;
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}
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#else
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int posix_memalign (void **ptr, size_t align, size_t size)
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{
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if (check_align (align))
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return EINVAL;
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*ptr = NULL;
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return size ? ENOMEM : 0;
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}
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#endif
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