EMACS_INT undo_limit;
EMACS_INT undo_strong_limit;
+EMACS_INT undo_outer_limit;
/* Number of live and free conses etc. */
static void mark_buffer P_ ((Lisp_Object));
extern void mark_kboards P_ ((void));
extern void mark_ttys P_ ((void));
+extern void mark_backtrace P_ ((void));
static void gc_sweep P_ ((void));
static void mark_glyph_matrix P_ ((struct glyph_matrix *));
static void mark_face_cache P_ ((struct face_cache *));
#ifdef HAVE_POSIX_MEMALIGN
{
int err = posix_memalign (&base, BLOCK_ALIGN, ABLOCKS_BYTES);
- abase = err ? (base = NULL) : base;
+ if (err)
+ base = NULL;
+ abase = base;
}
#else
base = malloc (ABLOCKS_BYTES);
abase = ALIGN (base, BLOCK_ALIGN);
+#endif
+
if (base == 0)
{
UNBLOCK_INPUT;
memory_full ();
}
-#endif
aligned = (base == abase);
if (!aligned)
free_ablock = ablock;
/* Update busy count. */
ABLOCKS_BUSY (abase) = (struct ablocks *) (-2 + (long) ABLOCKS_BUSY (abase));
-
+
if (2 > (long) ABLOCKS_BUSY (abase))
{ /* All the blocks are free. */
int i = 0, aligned = (long) ABLOCKS_BUSY (abase);
DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0,
- doc: /* Return a newly created string of length LENGTH, with each element being INIT.
-Both LENGTH and INIT must be numbers. */)
+ doc: /* Return a newly created string of length LENGTH, with INIT in each element.
+LENGTH must be an integer.
+INIT must be an integer that represents a character. */)
(length, init)
Lisp_Object length, init;
{
CHECK_NATNUM (length);
- bits_per_value = sizeof (EMACS_INT) * BITS_PER_CHAR;
+ bits_per_value = sizeof (EMACS_INT) * BOOL_VECTOR_BITS_PER_CHAR;
length_in_elts = (XFASTINT (length) + bits_per_value - 1) / bits_per_value;
- length_in_chars = ((XFASTINT (length) + BITS_PER_CHAR - 1) / BITS_PER_CHAR);
+ length_in_chars = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1)
+ / BOOL_VECTOR_BITS_PER_CHAR);
/* We must allocate one more elements than LENGTH_IN_ELTS for the
slot `size' of the struct Lisp_Bool_Vector. */
p->data[i] = real_init;
/* Clear the extraneous bits in the last byte. */
- if (XINT (length) != length_in_chars * BITS_PER_CHAR)
+ if (XINT (length) != length_in_chars * BOOL_VECTOR_BITS_PER_CHAR)
XBOOL_VECTOR (val)->data[length_in_chars - 1]
- &= (1 << (XINT (length) % BITS_PER_CHAR)) - 1;
+ &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1;
return val;
}
cons_free_list = ptr;
}
-
DEFUN ("cons", Fcons, Scons, 2, 2, 0,
doc: /* Create a new cons, give it CAR and CDR as components, and return it. */)
(car, cdr)
struct catchtag *next;
};
-struct backtrace
-{
- struct backtrace *next;
- Lisp_Object *function;
- Lisp_Object *args; /* Points to vector of args. */
- int nargs; /* Length of vector. */
- /* If nargs is UNEVALLED, args points to slot holding list of
- unevalled args. */
- char evalargs;
-};
-
-
\f
/***********************************************************************
Protection from GC
register struct specbinding *bind;
struct catchtag *catch;
struct handler *handler;
- register struct backtrace *backlist;
char stack_top_variable;
register int i;
int message_p;
if (! EQ (nextb->undo_list, Qt))
nextb->undo_list
= truncate_undo_list (nextb->undo_list, undo_limit,
- undo_strong_limit);
+ undo_strong_limit, undo_outer_limit);
/* Shrink buffer gaps, but skip indirect and dead buffers. */
if (nextb->base_buffer == 0 && !NILP (nextb->name))
mark_object (handler->handler);
mark_object (handler->var);
}
- for (backlist = backtrace_list; backlist; backlist = backlist->next)
- {
- mark_object (*backlist->function);
-
- if (backlist->nargs == UNEVALLED || backlist->nargs == MANY)
- i = 0;
- else
- i = backlist->nargs - 1;
- for (; i >= 0; i--)
- mark_object (backlist->args[i]);
- }
+ mark_backtrace ();
mark_kboards ();
mark_ttys ();
- /* Look thru every buffer's undo list
+#if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES
+ mark_stack ();
+#endif
+
+#ifdef USE_GTK
+ {
+ extern void xg_mark_data ();
+ xg_mark_data ();
+ }
+#endif
+
+ /* Everything is now marked, except for the things that require special
+ finalization, i.e. the undo_list.
+ Look thru every buffer's undo list
for elements that update markers that were not marked,
and delete them. */
{
}
}
}
+ /* Now that we have stripped the elements that need not be in the
+ undo_list any more, we can finally mark the list. */
+ mark_object (nextb->undo_list);
nextb = nextb->next;
}
}
-#if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES
- mark_stack ();
-#endif
-
-#ifdef USE_GTK
- {
- extern void xg_mark_data ();
- xg_mark_data ();
- }
-#endif
-
gc_sweep ();
/* Clear the mark bits that we set in certain root slots. */
MARK_INTERVAL_TREE (BUF_INTERVALS (buffer));
- if (CONSP (buffer->undo_list))
- {
- Lisp_Object tail;
- tail = buffer->undo_list;
-
- /* We mark the undo list specially because
- its pointers to markers should be weak. */
-
- while (CONSP (tail))
- {
- register struct Lisp_Cons *ptr = XCONS (tail);
-
- if (CONS_MARKED_P (ptr))
- break;
- CONS_MARK (ptr);
- if (GC_CONSP (ptr->car)
- && !CONS_MARKED_P (XCONS (ptr->car))
- && GC_MARKERP (XCAR (ptr->car)))
- {
- CONS_MARK (XCONS (ptr->car));
- mark_object (XCDR (ptr->car));
- }
- else
- mark_object (ptr->car);
-
- if (CONSP (ptr->cdr))
- tail = ptr->cdr;
- else
- break;
- }
-
- mark_object (XCDR (tail));
- }
- else
- mark_object (buffer->undo_list);
+ /* For now, we just don't mark the undo_list. It's done later in
+ a special way just before the sweep phase, and after stripping
+ some of its elements that are not needed any more. */
if (buffer->overlays_before)
{
DEFVAR_INT ("undo-strong-limit", &undo_strong_limit,
doc: /* Don't keep more than this much size of undo information.
-A command which pushes past this size is itself forgotten.
-This limit is applied when garbage collection happens.
+A previous command which pushes the undo list past this size
+is entirely forgotten when GC happens.
The size is counted as the number of bytes occupied,
which includes both saved text and other data. */);
undo_strong_limit = 30000;
+ DEFVAR_INT ("undo-outer-limit", &undo_outer_limit,
+ doc: /* Don't keep more than this much size of undo information.
+If the current command has produced more than this much undo information,
+GC discards it. This is a last-ditch limit to prevent memory overflow.
+The size is counted as the number of bytes occupied,
+which includes both saved text and other data. */);
+ undo_outer_limit = 300000;
+
DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages,
doc: /* Non-nil means display messages at start and end of garbage collection. */);
garbage_collection_messages = 0;