nptl/pthread_attr_getstacksize.c

   1 /* Copyright (C) 2002-2015 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 (attr, stacksize)
  25      const pthread_attr_t *attr;
  26      size_t *stacksize;
  27 {
  28   struct pthread_attr *iattr;
  29
  30   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
  31   iattr = (struct pthread_attr *) attr;
  32
  33   size_t size = iattr->stacksize;
  34
  35   /* If the user has not set a stack size we return what the system
  36      will use as the default.  */
  37   if (size == 0)
  38     {
  39       lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
  40       size = __default_pthread_attr.stacksize;
  41       lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
  42     }
  43   *stacksize = size;
  44
  45   return 0;
  46 }
  47 strong_alias (__pthread_attr_getstacksize, pthread_attr_getstacksize)