sync: split updating and triggering a counter up

Now that the brackets are always the nearest change points (regardless of
transition) we need to update the counters whenever we check for any updates.

Otherwise we end up with a situation where counter->value is out of date and
an alarm doesn't trigger because we're still using the value from last time
something actually triggered.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/Xext/sync.c b/Xext/sync.c
index ad3dec252..b2ee92e37 100644
--- a/Xext/sync.c
+++ b/Xext/sync.c
@@ -699,6 +699,14 @@ SyncAwaitTriggerFired(SyncTrigger * pTrigger)
     FreeResource(pAwaitUnion->header.delete_id, RT_NONE);
 }
 
+static CARD64
+SyncUpdateCounter(SyncCounter *pCounter, CARD64 newval)
+{
+    CARD64 oldval = pCounter->value;
+    pCounter->value = newval;
+    return oldval;
+}
+
 /*  This function should always be used to change a counter's value so that
  *  any triggers depending on the counter will be checked.
  */
@@ -708,8 +716,7 @@ SyncChangeCounter(SyncCounter * pCounter, CARD64 newval)
     SyncTriggerList *ptl, *pnext;
     CARD64 oldval;
 
-    oldval = pCounter->value;
-    pCounter->value = newval;
+    oldval = SyncUpdateCounter(pCounter, newval);
 
     /* run through triggers to see if any become true */
     for (ptl = pCounter->sync.pTriglist; ptl; ptl = pnext) {
@@ -2712,6 +2719,8 @@ IdleTimeCheckBrackets(SyncCounter *counter, XSyncValue idle, XSyncValue *less, X
         (less && XSyncValueLessOrEqual(idle, *less))) {
         SyncChangeCounter(counter, idle);
     }
+    else
+        SyncUpdateCounter(counter, idle);
 }
 
 static void