/* Functions for memory limit warnings.
- Copyright (C) 1990, 1992, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1992, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+ 2008 Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs 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, or (at your option)
-any later version.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#ifdef emacs
#include <config.h>
get_lim_data ()
{
_go32_dpmi_meminfo info;
+ unsigned long lim1, lim2;
_go32_dpmi_get_free_memory_information (&info);
- lim_data = info.available_memory;
+ /* DPMI server of Windows NT and its descendants reports in
+ info.available_memory a much lower amount that is really
+ available, which causes bogus "past 95% of memory limit"
+ warnings. Try to overcome that via circumstantial evidence. */
+ lim1 = info.available_memory;
+ lim2 = info.available_physical_pages;
+ /* DPMI Spec: "Fields that are unavailable will hold -1." */
+ if ((long)lim1 == -1L)
+ lim1 = 0;
+ if ((long)lim2 == -1L)
+ lim2 = 0;
+ else
+ lim2 *= 4096;
+ /* Surely, the available memory is at least what we have physically
+ available, right? */
+ if (lim1 >= lim2)
+ lim_data = lim1;
+ else
+ lim_data = lim2;
+ /* Don't believe they will give us more that 0.5 GB. */
+ if (lim_data > 512U * 1024U * 1024U)
+ lim_data = 512U * 1024U * 1024U;
}
#else /* not MSDOS */
static void