Discard killed buffers from deleted window and frame objects.

This reduces an amount of references to killed buffers and
helps GC to reclaim them faster.
* alloc.c (discard_killed_buffers): New function.
(mark_object): Use it for deleted windows and frames.
(mark_object): If symbol's value is set up for a killed buffer
or deleted frame, restore it's global binding.
* data.c (swap_in_global_binding): Add GC notice.
(swap_in_symval_forwarding): Use convenient set_blv_where.
* window.c (wset_next_buffers, wset_prev_buffers): Move ...
* window.h: ... to here.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index cecd31ddab4..46f1847f7f6 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,19 @@
 2012-09-11  Dmitry Antipov  <dmantipov@yandex.ru>
 
+        Discard killed buffers from deleted window and frame objects.
+        This reduces an amount of references to killed buffers and
+        helps GC to reclaim them faster.
+        * alloc.c (discard_killed_buffers): New function.
+        (mark_object): Use it for deleted windows and frames.
+        (mark_object): If symbol's value is set up for a killed buffer
+        or deleted frame, restore it's global binding.
+        * data.c (swap_in_global_binding): Add GC notice.
+        (swap_in_symval_forwarding): Use convenient set_blv_where.
+        * window.c (wset_next_buffers, wset_prev_buffers): Move ...
+        * window.h: ... to here.
+
+2012-09-11  Dmitry Antipov  <dmantipov@yandex.ru>
+
         Convenient macro to check whether the buffer is live.
         * buffer.h (BUFFER_LIVE_P): New macro.
         * alloc.c, buffer.c, editfns.c, insdel.c, lread.c, marker.c: