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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* 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)
static const bool stack_direction_negative = true;
#else
static const bool stack_direction_negative = false;
#endif
template <typename A_T, typename B_T>
inline static long used_stack(A_T A, B_T B)
{
if (stack_direction_negative)
return (long) (A - B);
else
return (long) (B - A);
}
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 */
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