1  /* sysconf_sigstksz ().  Linux version.
       2     Copyright (C) 2020-2023 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
      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  }