* lisp.h (struct Lisp_Hash_Table): Turn next_weak into a bare pointer.

* fns.c (weak_hash_tables): Rename from Vweak_hash_tables and turned
from a Lisp_Object into a bare pointer.
(make_hash_table, copy_hash_table, sweep_weak_hash_tables, init_fns):
Adjust the code correspondingly.

src/ChangeLog

+2007-07-11  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+	* lisp.h (struct Lisp_Hash_Table): Turn next_weak into a bare pointer.
+	* fns.c (weak_hash_tables): Rename from Vweak_hash_tables and turned
+	from a Lisp_Object into a bare pointer.
+	(make_hash_table, copy_hash_table, sweep_weak_hash_tables, init_fns):
+	Adjust the code correspondingly.
+
+	* alloc.c (emacs_blocked_free): Remove unused var `bytes_used_now'.
+
+	* term.c: Include unistd.h for ttyname, used in handle_one_term_event.
+	(term_show_mouse_face): Remove unused var `j'.
+	(handle_one_term_event): Remove unused vars `i' and `j'.
+	Don't cast return value of ttyname since it's not necessary.
+
 2007-07-10  Stefan Monnier  <monnier@iro.umontreal.ca>
 	* alloc.c (mark_maybe_pointer): Enforce mult-of-8 alignment when using

src/fns.c

@@ -4268,7 +4268,7 @@ base64_decode_1 (from, to, length, multibyte, nchars_return)
 
 /* The list of all weak hash tables.  Don't staticpro this one.  */
 
-Lisp_Object Vweak_hash_tables;
+struct Lisp_Hash_Table *weak_hash_tables;
 
 /* Various symbols.  */
 
@@ -4614,11 +4614,11 @@ make_hash_table (test, size, rehash_size, rehash_threshold, weak,
 
   /* Maybe add this hash table to the list of all weak hash tables.  */
   if (NILP (h->weak))
-    h->next_weak = Qnil;
+    h->next_weak = NULL;
   else
     {
-      h->next_weak = Vweak_hash_tables;
-      Vweak_hash_tables = table;
+      h->next_weak = weak_hash_tables;
+      weak_hash_tables = h;
     }
 
   return table;
@@ -4649,8 +4649,8 @@ copy_hash_table (h1)
   /* Maybe add this hash table to the list of all weak hash tables.  */
   if (!NILP (h2->weak))
     {
-      h2->next_weak = Vweak_hash_tables;
-      Vweak_hash_tables = table;
+      h2->next_weak = weak_hash_tables;
+      weak_hash_tables = h2;
     }
 
   return table;
@@ -4969,13 +4969,12 @@ sweep_weak_table (h, remove_entries_p)
 
 /* Remove elements from weak hash tables that don't survive the
    current garbage collection.  Remove weak tables that don't survive
-   from Vweak_hash_tables.  Called from gc_sweep.  */
+   from weak_hash_tables.  Called from gc_sweep.  */
 
 void
 sweep_weak_hash_tables ()
 {
-  Lisp_Object table, used, next;
-  struct Lisp_Hash_Table *h;
+  struct Lisp_Hash_Table *h, *used, *next;
   int marked;
 
   /* Mark all keys and values that are in use.  Keep on marking until
@@ -4987,9 +4986,8 @@ sweep_weak_hash_tables ()
   do
     {
       marked = 0;
-      for (table = Vweak_hash_tables; !GC_NILP (table); table = h->next_weak)
+      for (h = weak_hash_tables; h; h = h->next_weak)
 	{
-	  h = XHASH_TABLE (table);
 	  if (h->size & ARRAY_MARK_FLAG)
 	    marked |= sweep_weak_table (h, 0);
 	}
@@ -4997,9 +4995,8 @@ sweep_weak_hash_tables ()
   while (marked);
 
   /* Remove tables and entries that aren't used.  */
-  for (table = Vweak_hash_tables, used = Qnil; !GC_NILP (table); table = next)
+  for (h = weak_hash_tables, used = NULL; h; h = next)
     {
-      h = XHASH_TABLE (table);
       next = h->next_weak;
 
       if (h->size & ARRAY_MARK_FLAG)
@@ -5010,11 +5007,11 @@ sweep_weak_hash_tables ()
 
 	  /* Add table to the list of used weak hash tables.  */
 	  h->next_weak = used;
-	  used = table;
+	  used = h;
 	}
     }
 
-  Vweak_hash_tables = used;
+  weak_hash_tables = used;
 }
 
 
@@ -5915,7 +5912,7 @@ used if both `use-dialog-box' and this variable are non-nil.  */);
 void
 init_fns ()
 {
-  Vweak_hash_tables = Qnil;
+  weak_hash_tables = NULL;
 }
 
 /* arch-tag: 787f8219-5b74-46bd-8469-7e1cc475fa31

src/lisp.h

@@ -56,7 +56,7 @@ Boston, MA 02110-1301, USA.  */
 #ifdef GC_CHECK_CONS_LIST
 #define CHECK_CONS_LIST() check_cons_list()
 #else
-#define CHECK_CONS_LIST() 0
+#define CHECK_CONS_LIST() ((void)0)
 #endif
 
 /* These are default choices for the types to use.  */
@@ -1041,16 +1041,16 @@ struct Lisp_Hash_Table
      hash table size to reduce collisions.  */
   Lisp_Object index;
 
-  /* Next weak hash table if this is a weak hash table.  The head
-     of the list is in Vweak_hash_tables.  */
-  Lisp_Object next_weak;
-
   /* User-supplied hash function, or nil.  */
   Lisp_Object user_hash_function;
 
   /* User-supplied key comparison function, or nil.  */
   Lisp_Object user_cmp_function;
 
+  /* Next weak hash table if this is a weak hash table.  The head
+     of the list is in weak_hash_tables.  */
+  struct Lisp_Hash_Table *next_weak;
+
   /* C function to compare two keys.  */
   int (* cmpfn) P_ ((struct Lisp_Hash_Table *, Lisp_Object,
 		     unsigned, Lisp_Object, unsigned));