Move event filter initializer out of the structure itself

When kept in the structure, it causes the entire MAXDEVICES * 128 masks
to be stored in the data segment and loaded from the file, and also leads
to worries about later generations inheriting changes across server reset.

           text    data     bss     dec     hex filename
Before:   91837   20528      32  112397   1b70d .libs/events.o
After:    92277      48   20512  112837   1b8c5 .libs/events.o
Before: 3013384  122696  163156 3299236  3257a4 Xorg
After:  3013832  102216  183636 3299684  325964 Xorg

File size before:       4337008 Xorg
File size after:        4316568 Xorg

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>

1 files changed, 8 insertions, 9 deletions

diff --git a/dix/events.c b/dix/events.c
index d70d62fd8..1d513eb10 100644
--- a/dix/events.c
+++ b/dix/events.c
@@ -345,8 +345,8 @@ extern int DeviceMotionNotify;
 /**
  * Event masks for each event type.
  *
- * One set of filters for each device, but only the first layer
- * is initialized. The rest is memcpy'd in InitEvents.
+ * One set of filters for each device, initialized by memcpy of
+ * default_filter in InitEvents.
  *
  * Filters are used whether a given event may be delivered to a client,
  * usually in the form of if (window-event-mask & filter); then deliver event.
@@ -355,7 +355,9 @@ extern int DeviceMotionNotify;
  * time a button is pressed, the filter is modified to also contain the
  * matching ButtonXMotion mask.
  */
-static Mask filters[MAXDEVICES][128] = {
+static Mask filters[MAXDEVICES][128];
+
+static const Mask default_filter[128] =
 {
 	NoSuchEvent,		       /* 0 */
 	NoSuchEvent,		       /* 1 */
@@ -392,7 +394,7 @@ static Mask filters[MAXDEVICES][128] = {
 	ColormapChangeMask,	       /* ColormapNotify */
 	CantBeFiltered,		       /* ClientMessage */
 	CantBeFiltered		       /* MappingNotify */
-}};
+};
 
 /**
  * For the given event, return the matching event filter. This filter may then
@@ -4977,12 +4979,9 @@ InitEvents(void)
     inputInfo.off_devices = (DeviceIntPtr)NULL;
     inputInfo.keyboard = (DeviceIntPtr)NULL;
     inputInfo.pointer = (DeviceIntPtr)NULL;
-    /* The mask for pointer motion events may have changed in the last server
-     * generation. See comment above definition of filters. */
-    filters[0][PointerMotionMask] = MotionNotify;
-    for (i = 1; i < MAXDEVICES; i++)
+    for (i = 0; i < MAXDEVICES; i++)
     {
-        memcpy(&filters[i], filters[0], sizeof(filters[0]));
+        memcpy(&filters[i], default_filter, sizeof(default_filter));
     }
 
     syncEvents.replayDev = (DeviceIntPtr)NULL;