relibc_pthreads-emb/pthread_attr_getstacksize.c

/*
 * pthread_attr_getstacksize.c
 *
 * Description:
 * This translation unit implements operations on thread attribute objects.
 *
 * --------------------------------------------------------------------------
 *
 *      Pthreads-embedded (PTE) - POSIX Threads Library for embedded systems
 *      Copyright(C) 2008 Jason Schmidlapp
 *
 *      Contact Email: jschmidlapp@users.sourceforge.net
 *
 *
 *      Based upon Pthreads-win32 - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999,2005 Pthreads-win32 contributors
 *
 *      Contact Email: rpj@callisto.canberra.edu.au
 *
 *      The original list of contributors to the Pthreads-win32 project
 *      is contained in the file CONTRIBUTORS.ptw32 included with the
 *      source code distribution. The list can also be seen at the
 *      following World Wide Web location:
 *      http://sources.redhat.com/pthreads-win32/contributors.html
 *
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation; either
 *      version 2 of the License, or (at your option) any later version.
 *
 *      This library is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *      Lesser General Public License for more details.
 *
 *      You should have received a copy of the GNU Lesser General Public
 *      License along with this library in the file COPYING.LIB;
 *      if not, write to the Free Software Foundation, Inc.,
 *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include "pthread.h"
#include "implement.h"


int
pthread_attr_getstacksize (const pthread_attr_t * attr, size_t * stacksize)
/*
 * ------------------------------------------------------
 * DOCPUBLIC
 *      This function determines the size of the stack on
 *      which threads created with 'attr' will run.
 *
 * PARAMETERS
 *      attr
 *              pointer to an instance of pthread_attr_t
 *
 *      stacksize
 *              pointer to size_t into which is returned the
 *              stack size, in bytes.
 *
 *
 * DESCRIPTION
 *      This function determines the size of the stack on
 *      which threads created with 'attr' will run.
 *
 *      NOTES:
 *              1)      Function supported only if this macro is
 *                      defined:
 *
 *                              _POSIX_THREAD_ATTR_STACKSIZE
 *
 *              2)      Use on newly created attributes object to
 *                      find the default stack size.
 *
 * RESULTS
 *              0               successfully retrieved stack size,
 *              EINVAL          'attr' is invalid
 *              ENOSYS          function not supported
 *
 * ------------------------------------------------------
 */
{
#ifdef _POSIX_THREAD_ATTR_STACKSIZE

  if (pte_is_attr (attr) != 0)
    {
      return EINVAL;
    }

  /* Everything is okay. */
  *stacksize = (*attr)->stacksize;
  return 0;

#else

  return ENOSYS;

#endif /* _POSIX_THREAD_ATTR_STACKSIZE */

}