1 /* Determine whether block of given size can be allocated on the stack or not.
2 Copyright (C) 2002, 2006 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, see <http://www.gnu.org/licenses/>. */
18
19 #include <alloca.h>
20 #include <limits.h>
21
22
23 extern int
24 __always_inline
__libc_use_alloca(size_t size)25 __libc_use_alloca (size_t size)
26 {
27 return (__builtin_expect (size <= PTHREAD_STACK_MIN / 4, 1)
28 || __libc_alloca_cutoff (size));
29 }
30