nptl/pthread_attr_getstacksize.c

   1 /* Copyright (C) 2002-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 #include "pthreadP.h"
  20 #include <shlib-compat.h>
  21
  22 int
  23 __pthread_attr_getstacksize (const pthread_attr_t *attr, size_t *stacksize)
  24 {
  25   struct pthread_attr *iattr;
  26
  27   iattr = (struct pthread_attr *) attr;
  28
  29   size_t size = iattr->stacksize;
  30
  31   /* If the user has not set a stack size we return what the system
  32      will use as the default.  */
  33   if (size == 0)
  34     {
  35       lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
  36       size = __default_pthread_attr.internal.stacksize;
  37       lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
  38     }
  39   *stacksize = size;
  40
  41   return 0;
  42 }
  43 versioned_symbol (libc, __pthread_attr_getstacksize,
  44                   pthread_attr_getstacksize, GLIBC_2_34);
  45 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_34)
  46 compat_symbol (libpthread, __pthread_attr_getstacksize,
  47                pthread_attr_getstacksize, GLIBC_2_1);
  48 #endif