/* Functions for memory limit warnings.
Copyright (C) 1990, 1992, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
- 2008 Free Software Foundation, Inc.
+ 2008, 2009 Free Software Foundation, Inc.
This file is part of GNU Emacs.
}
#else /* not NO_LIM_DATA */
+#if defined (HAVE_GETRLIMIT) && defined (RLIMIT_AS)
+static void
+get_lim_data ()
+{
+ struct rlimit rlimit;
+
+ getrlimit (RLIMIT_AS, &rlimit);
+ if (rlimit.rlim_cur == RLIM_INFINITY)
+ lim_data = -1;
+ else
+ lim_data = rlimit.rlim_cur;
+}
+
+#else /* not HAVE_GETRLIMIT */
+
#ifdef USG
static void
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;
+}
+
+unsigned long
+ret_lim_data ()
+{
+ get_lim_data ();
+ return lim_data;
}
#else /* not MSDOS */
static void
#endif /* BSD4_2 */
#endif /* not WINDOWSNT */
#endif /* not USG */
+#endif /* not HAVE_GETRLIMIT */
#endif /* not NO_LIM_DATA */
\f
/* Verify amount of memory available, complaining if we're near the end. */
#endif
extern POINTER (*__morecore) ();
-
register POINTER cp;
unsigned long five_percent;
unsigned long data_size;
enum warnlevel new_warnlevel;
-#ifdef HAVE_GETRLIMIT
- struct rlimit rlimit;
-
- getrlimit (RLIMIT_AS, &rlimit);
-
- if (RLIM_INFINITY == rlimit.rlim_max)
- return;
-
- /* This is a nonsensical case, but it happens -- rms. */
- if (rlimit.rlim_cur > rlimit.rlim_max)
- return;
-
- five_percent = rlimit.rlim_max / 20;
- data_size = rlimit.rlim_cur;
-
-#else /* not HAVE_GETRLIMIT */
-
if (lim_data == 0)
get_lim_data ();
five_percent = lim_data / 20;
cp = (char *) (*__morecore) (0);
data_size = (char *) cp - (char *) data_space_start;
-#endif /* not HAVE_GETRLIMIT */
-
if (!warn_function)
return;
/* What level of warning does current memory usage demand? */
- if (data_size > five_percent * 19)
- new_warnlevel = warned_95;
- else if (data_size > five_percent * 17)
- new_warnlevel = warned_85;
- else if (data_size > five_percent * 15)
- new_warnlevel = warned_75;
- else
- new_warnlevel = not_warned;
+ new_warnlevel
+ = (data_size > five_percent * 19) ? warned_95
+ : (data_size > five_percent * 17) ? warned_85
+ : (data_size > five_percent * 15) ? warned_75
+ : not_warned;
/* If we have gone up a level, give the appropriate warning. */
if (new_warnlevel > warnlevel || new_warnlevel == warned_95)