/* Functions for memory limit warnings.
- Copyright (C) 1990, 1992, 2001-2011 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1992, 2001-2013 Free Software Foundation, Inc.
This file is part of GNU Emacs.
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
-#include <setjmp.h>
+#include <unistd.h> /* for 'environ', on AIX */
#include "lisp.h"
#include "mem-limits.h"
enum warnlevel { not_warned, warned_75, warned_85, warned_95 };
static enum warnlevel warnlevel;
-typedef POINTER_TYPE *POINTER;
+typedef void *POINTER;
/* Function to call to issue a warning;
0 means don't issue them. */
static POINTER data_space_start;
/* Number of bytes of writable memory we can expect to be able to get. */
-static unsigned long lim_data;
+static size_t lim_data;
\f
-#if defined (HAVE_GETRLIMIT) && defined (RLIMIT_AS)
-static void
-get_lim_data (void)
-{
- 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 HAVE_GETRLIMIT
-#ifdef USG
+# ifndef RLIMIT_AS
+# define RLIMIT_AS RLIMIT_DATA
+# endif
static void
get_lim_data (void)
{
- extern long ulimit ();
-
- lim_data = -1;
-
- /* Use the ulimit call, if we seem to have it. */
-#if !defined (ULIMIT_BREAK_VALUE) || defined (GNU_LINUX)
- lim_data = ulimit (3, 0);
-#endif
-
- /* If that didn't work, just use the macro's value. */
-#ifdef ULIMIT_BREAK_VALUE
- if (lim_data == -1)
- lim_data = ULIMIT_BREAK_VALUE;
-#endif
-
- lim_data -= (long) data_space_start;
+ /* Set LIM_DATA to the minimum of the maximum object size and the
+ maximum address space. Don't bother to check for values like
+ RLIM_INFINITY since in practice they are not much less than SIZE_MAX. */
+ struct rlimit rlimit;
+ lim_data
+ = (getrlimit (RLIMIT_AS, &rlimit) == 0 && rlimit.rlim_cur <= SIZE_MAX
+ ? rlimit.rlim_cur
+ : SIZE_MAX);
}
-#else /* not USG */
-#ifdef WINDOWSNT
+#elif defined WINDOWSNT
+
+#include "w32heap.h"
static void
get_lim_data (void)
{
- extern unsigned long reserved_heap_size;
+ extern size_t reserved_heap_size;
lim_data = reserved_heap_size;
}
-#else
-#if !defined (BSD4_2) && !defined (CYGWIN)
+#elif defined MSDOS
-#ifdef MSDOS
void
get_lim_data (void)
{
get_lim_data ();
return lim_data;
}
-#else /* not MSDOS */
-static void
-get_lim_data (void)
-{
- lim_data = vlimit (LIM_DATA, -1);
-}
-#endif /* not MSDOS */
-
-#else /* BSD4_2 || CYGWIN */
-
-static void
-get_lim_data (void)
-{
- struct rlimit XXrlimit;
-
- getrlimit (RLIMIT_DATA, &XXrlimit);
-#ifdef RLIM_INFINITY
- lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
#else
- lim_data = XXrlimit.rlim_cur; /* soft limit */
+# error "get_lim_data not implemented on this machine"
#endif
-}
-#endif /* BSD4_2 */
-#endif /* not WINDOWSNT */
-#endif /* not USG */
-#endif /* not HAVE_GETRLIMIT */
\f
/* Verify amount of memory available, complaining if we're near the end. */
check_memory_limits (void)
{
#ifdef REL_ALLOC
- extern POINTER (*real_morecore) (SIZE);
+ extern POINTER (*real_morecore) (ptrdiff_t);
#endif
- extern POINTER (*__morecore) (SIZE);
+ extern POINTER (*__morecore) (ptrdiff_t);
register POINTER cp;
- unsigned long five_percent;
- unsigned long data_size;
+ size_t five_percent;
+ size_t data_size;
enum warnlevel new_warnlevel;
if (lim_data == 0)
(*warn_function) ("Warning: memory in use exceeds lisp pointer size");
}
\f
-#if !defined(CANNOT_DUMP) || !defined(SYSTEM_MALLOC)
+#if !defined (CANNOT_DUMP) || !defined (SYSTEM_MALLOC)
/* Some systems that cannot dump also cannot implement these. */
/*
* 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;
/* Force data limit to be recalculated on each run. */
lim_data = 0;
}
-