nptl/pthread_attr_getstack.c

   1 /* Copyright (C) 2002-2022 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_getstack (const pthread_attr_t *attr, void **stackaddr,
  23                          size_t *stacksize)
  24 {
  25   struct pthread_attr *iattr;
  26
  27   iattr = (struct pthread_attr *) attr;
  28
  29   /* Store the result.  */
  30 #if _STACK_GROWS_DOWN
  31   *stackaddr = (char *) iattr->stackaddr - iattr->stacksize;
  32 #else
  33   *stackaddr = (char *) iattr->stackaddr;
  34 #endif
  35   *stacksize = iattr->stacksize;
  36
  37   return 0;
  38 }
  39 versioned_symbol (libpthread, __pthread_attr_getstack,
  40                   pthread_attr_getstack, GLIBC_2_34);
  41 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
  42 compat_symbol (libpthread, __pthread_attr_getstack,
  43                pthread_attr_getstack, GLIBC_2_2);
  44 #endif