nptl/pthread_attr_getstacksize.c

   1 /* Copyright (C) 2002-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   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
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include "pthreadP.h"
  19 #include <shlib-compat.h>
  20
  21 int
  22 __pthread_attr_getstacksize (const pthread_attr_t *attr, size_t *stacksize)
  23 {
  24   struct pthread_attr *iattr;
  25
  26   iattr = (struct pthread_attr *) attr;
  27
  28   size_t size = iattr->stacksize;
  29
  30   /* If the user has not set a stack size we return what the system
  31      will use as the default.  */
  32   if (size == 0)
  33     {
  34       lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
  35       size = __default_pthread_attr.internal.stacksize;
  36       lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
  37     }
  38   *stacksize = size;
  39
  40   return 0;
  41 }
  42 versioned_symbol (libc, __pthread_attr_getstacksize,
  43                   pthread_attr_getstacksize, GLIBC_2_34);
  44 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_34)
  45 compat_symbol (libpthread, __pthread_attr_getstacksize,
  46                pthread_attr_getstacksize, GLIBC_2_1);
  47 #endif