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/*
* Basic C environment.
*
* Copyright (c) 2007-2009 Marko Kreen
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <usual/base.h>
#include <usual/bits.h>
#if defined(HAVE_MALLOC_H) && defined(__darwin__)
#include <malloc.h>
#endif
/* define posix_memalign() only when possible to emulate */
#if !defined(HAVE_POSIX_MEMALIGN) \
&& (defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC))
int posix_memalign(void **ptr_p, size_t align, size_t len)
{
void *p;
int ret, old_errno = errno;
#ifdef HAVE_MEMALIGN
p = memalign(align, len);
#else /* !HAVE_MEMALIGN */
#ifdef HAVE_VALLOC
/* assuming less than pagesize alignment */
p = valloc(len);
#endif /* !VALLOC */
#endif /* !MEMALIGN */
*ptr_p = p;
if (p)
return 0;
/* on error restore old errno */
ret = errno;
errno = old_errno;
return ret;
}
#endif
#ifndef HAVE_REALLOCARRAY
void *reallocarray(void *p, size_t count, size_t size)
{
size_t total;
if (!safe_mul_size(&total, count, size)) {
errno = ENOMEM;
return NULL;
}
return realloc(p, total);
}
#endif
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