Per-buffer window counters.

* buffer.h (struct buffer): New member window_count.
(buffer_window_count): New function.
* buffer.c (Fget_buffer_create, Fmake_indirect_buffer):
Initialize window_count.
(Fkill_buffer): Verify window_count for the buffer being killed.
(modify_overlay): Do not force redisplay if buffer is not shown
in any window.
(init_buffer_once): Initialize window_count for buffer_defaults
and buffer_local_symbols.
* window.h (buffer_shared): Remove declaration.
(wset_buffer): Convert from inline ...
* window.c (wset_buffer): ... to an ordinary function.
(adjust_window_count): New function.
(make_parent_window): Use it.
* xdisp.c (buffer_shared): Remove.
(redisplay_internal, redisplay_window): Adjust users.
(buffer_shared_and_changed): Use per-buffer window counter.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 584ee17cc1b..ecaa60697ea 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,24 @@
+2012-12-10  Dmitry Antipov  <dmantipov@yandex.ru>
+
+        Per-buffer window counters.
+        * buffer.h (struct buffer): New member window_count.
+        (buffer_window_count): New function.
+        * buffer.c (Fget_buffer_create, Fmake_indirect_buffer):
+        Initialize window_count.
+        (Fkill_buffer): Verify window_count for the buffer being killed.
+        (modify_overlay): Do not force redisplay if buffer is not shown
+        in any window.
+        (init_buffer_once): Initialize window_count for buffer_defaults
+        and buffer_local_symbols.
+        * window.h (buffer_shared): Remove declaration.
+        (wset_buffer): Convert from inline ...
+        * window.c (wset_buffer): ... to an ordinary function.
+        (adjust_window_count): New function.
+        (make_parent_window): Use it.
+        * xdisp.c (buffer_shared): Remove.
+        (redisplay_internal, redisplay_window): Adjust users.
+        (buffer_shared_and_changed): Use per-buffer window counter.
+
 2012-12-10  Eli Zaretskii  <eliz@gnu.org>
 
         Support for filesystem notifications on MS-Windows.