~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 Sun Microsystems

 *

 *  This program 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; version 2 of the License.

 *

 *  This program 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 this program; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include "config.h"

#include "drizzled/internal/my_sys.h"

#include <drizzled/definitions.h>

#include <drizzled/session.h>

#include <drizzled/error.h>

#include <drizzled/check_stack_overrun.h>

namespace drizzled

{

/****************************************************************************

	Check stack size; Send error if there isn't enough stack to continue

****************************************************************************/

#if defined(STACK_DIRECTION) && (STACK_DIRECTION < 0)

#define used_stack(A,B) (long) (A - B)

#else

#define used_stack(A,B) (long) (B - A)

#endif

extern size_t my_thread_stack_size;

bool check_stack_overrun(Session *session, long margin, void *)

{

  long stack_used;

  if ((stack_used=used_stack(session->thread_stack,(char*) &stack_used)) >=

      (long) (my_thread_stack_size - margin))

  {

    my_printf_error(ER_STACK_OVERRUN_NEED_MORE, ER(ER_STACK_OVERRUN_NEED_MORE),

                    MYF(ME_FATALERROR),

                    stack_used,my_thread_stack_size,margin);

    return true;

  }

  return false;

}

} /* namespace drizzled */