/*
 * pthread_attr_setstacksize.c
 *
 * Description:
 * This translation unit implements operations on thread attribute objects.
 *
 * --------------------------------------------------------------------------
 *
 *      Pthreads4w - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999-2018, Pthreads4w contributors
 *
 *      Homepage: https://sourceforge.net/projects/pthreads4w/
 *
 *      The current list of contributors is contained
 *      in the file CONTRIBUTORS included with the source
 *      code distribution. The list can also be seen at the
 *      following World Wide Web location:
 *      https://sourceforge.net/p/pthreads4w/wiki/Contributors/
 *
 * This file is part of Pthreads4w.
 *
 *    Pthreads4w is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    Pthreads4w 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 General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with Pthreads4w.  If not, see <http://www.gnu.org/licenses/>. *
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

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


int
pthread_attr_setstacksize (pthread_attr_t * attr, size_t stacksize)
     /*
      * ------------------------------------------------------
      * DOCPUBLIC
      *      This function specifies the size of the stack on
      *      which threads created with 'attr' will run.
      *
      * PARAMETERS
      *      attr
      *              pointer to an instance of pthread_attr_t
      *
      *      stacksize
      *              stack size, in bytes.
      *
      *
      * DESCRIPTION
      *      This function specifies 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)      Find the default first (using
      *                      pthread_attr_getstacksize), then increase
      *                      by multiplying.
      *
      *              3)      Only use if thread needs more than the
      *                      default.
      *
      * RESULTS
      *              0               successfully set stack size,
      *              EINVAL          'attr' is invalid or stacksize too
      *                              small or too big.
      *              ENOSYS          function not supported
      *
      * ------------------------------------------------------
      */
{
#if defined(_POSIX_THREAD_ATTR_STACKSIZE) && _POSIX_THREAD_ATTR_STACKSIZE != -1

#if PTHREAD_STACK_MIN > 0

  /*  Verify that the stack size is within range. */
  if (stacksize < PTHREAD_STACK_MIN)
    {
      return EINVAL;
    }

#endif

  if (ptw32_is_attr (attr) != 0)
    {
      return EINVAL;
    }

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

#else

  return ENOSYS;

#endif /* _POSIX_THREAD_ATTR_STACKSIZE */

}