1 /* sysconf_sigstksz ().  Linux version.
2    Copyright (C) 2020-2022 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
7    License as published by the Free Software Foundation; either
8    version 2.1 of the 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; if not, see
17    <https://www.gnu.org/licenses/>.  */
18 
19 /* Return sysconf (_SC_SIGSTKSZ).  */
20 
21 static long int
sysconf_sigstksz(void)22 sysconf_sigstksz (void)
23 {
24   long int minsigstacksize = GLRO(dl_minsigstacksize);
25   assert (minsigstacksize != 0);
26   _Static_assert (__builtin_constant_p (MINSIGSTKSZ),
27 		  "MINSIGSTKSZ is constant");
28   if (minsigstacksize < MINSIGSTKSZ)
29     minsigstacksize = MINSIGSTKSZ;
30   /* MAX (MINSIGSTKSZ, sysconf (_SC_MINSIGSTKSZ)) * 4.  */
31   long int sigstacksize = minsigstacksize * 4;
32   /* Return MAX (SIGSTKSZ, sigstacksize).  */
33   _Static_assert (__builtin_constant_p (SIGSTKSZ),
34 		  "SIGSTKSZ is constant");
35   if (sigstacksize < SIGSTKSZ)
36     sigstacksize = SIGSTKSZ;
37   return sigstacksize;
38 }
39