lib/libc/stdlib/aligned_alloc.c

   1 /*-
   2 * Copyright (c) 2012
   3 *       The DragonFly Project.  All rights reserved.
   4 *
   5 * Redistribution and use in source and binary forms, with or without
   6 * modification, are permitted provided that the following conditions
   7 * are met:
   8 *
   9 * 1. Redistributions of source code must retain the above copyright
  10 *    notice, this list of conditions and the following disclaimer.
  11 * 2. Redistributions in binary form must reproduce the above copyright
  12 *    notice, this list of conditions and the following disclaimer in
  13 *    the documentation and/or other materials provided with the
  14 *    distribution.
  15 * 3. Neither the name of The DragonFly Project nor the names of its
  16 *    contributors may be used to endorse or promote products derived
  17 *    from this software without specific, prior written permission.
  18 *
  19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  24 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30 * SUCH DAMAGE.
  31 */
  32
  33 #include <sys/types.h>
  34 #include <stdlib.h>
  35 #include <errno.h>
  36
  37 void *
  38 aligned_alloc(size_t alignment, size_t size)
  39 {
  40         void *ptr;
  41         int rc;
  42
  43         ptr = NULL;
  44         rc = posix_memalign(&ptr, alignment, size);
  45         if (rc)
  46                 errno = rc;
  47
  48         return (ptr);
  49 }