/* 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, 2001-2011 Free Software Foundation, Inc.
This file is part of GNU Emacs.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
-#ifdef emacs
#include <config.h>
+#include <setjmp.h>
#include "lisp.h"
-#endif
-
-#ifndef emacs
-#include <stddef.h>
-typedef size_t SIZE;
-typedef void *POINTER;
-#define EXCEEDS_LISP_PTR(x) 0
-#endif
-
#include "mem-limits.h"
-#ifdef HAVE_GETRLIMIT
-#include <sys/resource.h>
-#endif
-
/*
Level number of warnings already issued.
0 -- no warnings issued.
3 -- 95% warning issued; keep warning frequently.
*/
enum warnlevel { not_warned, warned_75, warned_85, warned_95 };
-
static enum warnlevel warnlevel;
+typedef POINTER_TYPE *POINTER;
+
/* Function to call to issue a warning;
0 means don't issue them. */
-static void (*warn_function) ();
+static void (*warn_function) (const char *);
/* Start of data space; can be changed by calling malloc_init. */
static POINTER data_space_start;
static unsigned long lim_data;
\f
-#ifdef NO_LIM_DATA
-static void
-get_lim_data ()
-{
- lim_data = -1;
-}
-#else /* not NO_LIM_DATA */
-
#if defined (HAVE_GETRLIMIT) && defined (RLIMIT_AS)
static void
-get_lim_data ()
+get_lim_data (void)
{
struct rlimit rlimit;
#ifdef USG
static void
-get_lim_data ()
+get_lim_data (void)
{
extern long ulimit ();
#ifdef WINDOWSNT
static void
-get_lim_data ()
+get_lim_data (void)
{
extern unsigned long reserved_heap_size;
lim_data = reserved_heap_size;
}
#else
-#if !defined (BSD4_2) && !defined (__osf__)
+#if !defined (BSD4_2) && !defined (CYGWIN)
#ifdef MSDOS
void
-get_lim_data ()
+get_lim_data (void)
{
_go32_dpmi_meminfo info;
unsigned long lim1, lim2;
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 * 4096;
+ 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)
+ 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 > 512 * 1024 * 1024)
- lim_data = 512 * 1024 * 1024;
+ if (lim_data > 512U * 1024U * 1024U)
+ lim_data = 512U * 1024U * 1024U;
+}
+
+unsigned long
+ret_lim_data (void)
+{
+ get_lim_data ();
+ return lim_data;
}
#else /* not MSDOS */
static void
-get_lim_data ()
+get_lim_data (void)
{
lim_data = vlimit (LIM_DATA, -1);
}
#endif /* not MSDOS */
-#else /* BSD4_2 */
+#else /* BSD4_2 || CYGWIN */
static void
-get_lim_data ()
+get_lim_data (void)
{
struct rlimit XXrlimit;
#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. */
static void
-check_memory_limits ()
+check_memory_limits (void)
{
#ifdef REL_ALLOC
- extern POINTER (*real_morecore) ();
+ extern POINTER (*real_morecore) (long);
#endif
- extern POINTER (*__morecore) ();
+ extern POINTER (*__morecore) (long);
register POINTER cp;
unsigned long five_percent;
(*warn_function) ("Warning: memory in use exceeds lisp pointer size");
}
\f
+#if !defined(CANNOT_DUMP) || !defined(SYSTEM_MALLOC)
+/* Some systems that cannot dump also cannot implement these. */
+
+/*
+ * Return the address of the start of the data segment prior to
+ * doing an unexec. After unexec the return value is undefined.
+ * See crt0.c for further information and definition of data_start.
+ *
+ * Apparently, on BSD systems this is etext at startup. On
+ * USG systems (swapping) this is highly mmu dependent and
+ * is also dependent on whether or not the program is running
+ * with shared text. Generally there is a (possibly large)
+ * gap between end of text and start of data with shared text.
+ *
+ */
+
+char *
+start_of_data (void)
+{
+#ifdef BSD_SYSTEM
+ extern char etext;
+ return (POINTER)(&etext);
+#elif defined DATA_START
+ return ((POINTER) DATA_START);
+#elif defined ORDINARY_LINK
+ /*
+ * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
+ * data_start isn't defined. We take the address of environ, which
+ * is known to live at or near the start of the system crt0.c, and
+ * we don't sweat the handful of bytes that might lose.
+ */
+ extern char **environ;
+ return ((POINTER) &environ);
+#else
+ extern int data_start;
+ return ((POINTER) &data_start);
+#endif
+}
+#endif /* (not CANNOT_DUMP or not SYSTEM_MALLOC) */
+\f
/* Enable memory usage warnings.
START says where the end of pure storage is.
WARNFUN specifies the function to call to issue a warning. */
void
-memory_warnings (start, warnfun)
- POINTER start;
- void (*warnfun) ();
+memory_warnings (POINTER start, void (*warnfun) (const char *))
{
- extern void (* __after_morecore_hook) (); /* From gmalloc.c */
+ extern void (* __after_morecore_hook) (void); /* From gmalloc.c */
if (start)
data_space_start = start;
/* Force data limit to be recalculated on each run. */
lim_data = 0;
}
-
-/* arch-tag: eab04eda-1f69-447a-8d9f-95f0a3983ca5
- (do not change this comment) */