alloca_cutoff.c 1.3 KB

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  1. /* Determine whether block of given size can be allocated on the stack or not.
  2. Copyright (C) 2002, 2003 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public License as
  6. published by the Free Software Foundation; either version 2.1 of the
  7. License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; see the file COPYING.LIB. If not,
  14. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  15. Boston, MA 02111-1307, USA. */
  16. #include <alloca.h>
  17. #include <stdlib.h>
  18. #include <sys/param.h>
  19. #include "internals.h"
  20. #include <sysdep-cancel.h>
  21. int
  22. __libc_alloca_cutoff (size_t size)
  23. {
  24. if (! SINGLE_THREAD_P)
  25. {
  26. pthread_descr self = thread_self ();
  27. return size <= LIBC_THREAD_GETMEM (self, p_alloca_cutoff);
  28. }
  29. return size <= __MAX_ALLOCA_CUTOFF;
  30. }