nptl/pthread_attr_getstack.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_getstack (const pthread_attr_t *attr, void **stackaddr,
  24                          size_t *stacksize)
  25 {
  26   struct pthread_attr *iattr;
  27
  28   iattr = (struct pthread_attr *) attr;
  29
  30   /* Store the result.  */
  31 #if _STACK_GROWS_DOWN
  32   *stackaddr = (char *) iattr->stackaddr - iattr->stacksize;
  33 #else
  34   *stackaddr = (char *) iattr->stackaddr;
  35 #endif
  36   *stacksize = iattr->stacksize;
  37
  38   return 0;
  39 }
  40 versioned_symbol (libpthread, __pthread_attr_getstack,
  41                   pthread_attr_getstack, GLIBC_2_34);
  42 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
  43 compat_symbol (libpthread, __pthread_attr_getstack,
  44                pthread_attr_getstack, GLIBC_2_2);
  45 #endif