posix_memalign.c 1.4 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /* posix_memalign for uClibc
  3. *
  4. * Copyright (C) 1996-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
  5. * Copyright (C) 2005 by Erik Andersen <andersen@uclibc.org>
  6. *
  7. * This program is free software; you can redistribute it and/or modify it
  8. * under the terms of the GNU Library General Public License as published by
  9. * the Free Software Foundation; either version 2 of the License, or (at your
  10. * option) any later version.
  11. *
  12. * This program is distributed in the hope that it will be useful, but WITHOUT
  13. * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14. * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
  15. * for more details.
  16. *
  17. * You should have received a copy of the GNU Library General Public License
  18. * along with this program; see the file COPYING.LIB. If not, see
  19. * <http://www.gnu.org/licenses/>.
  20. */
  21. #include <stdlib.h>
  22. #include <malloc.h>
  23. #include <sys/types.h>
  24. #include <errno.h>
  25. #include <sys/param.h>
  26. int posix_memalign(void **memptr, size_t alignment, size_t size)
  27. {
  28. /* Make sure alignment is correct. */
  29. if (alignment % sizeof(void *) != 0)
  30. /* Skip these checks because the memalign() func does them for us
  31. || !powerof2(alignment / sizeof(void *)) != 0
  32. || alignment == 0
  33. */
  34. return EINVAL;
  35. *memptr = memalign(alignment, size);
  36. return (*memptr != NULL ? 0 : ENOMEM);
  37. }