nptl/pthread_attr_getstacksize.c

   1 /* Copyright (C) 2002-2016 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include "pthreadP.h"
  21
  22
  23 int
  24 __pthread_attr_getstacksize (const pthread_attr_t *attr, size_t *stacksize)
  25 {
  26   struct pthread_attr *iattr;
  27
  28   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
  29   iattr = (struct pthread_attr *) attr;
  30
  31   size_t size = iattr->stacksize;
  32
  33   /* If the user has not set a stack size we return what the system
  34      will use as the default.  */
  35   if (size == 0)
  36     {
  37       lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
  38       size = __default_pthread_attr.stacksize;
  39       lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
  40     }
  41   *stacksize = size;
  42
  43   return 0;
  44 }
  45 strong_alias (__pthread_attr_getstacksize, pthread_attr_getstacksize)