Merged revisions 140060 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r140060 | russell | 2008-08-26 11:07:58 -0500 (Tue, 26 Aug 2008) | 6 lines

Fix some bogus scheduler usage in chan_sip.  This code used the return value
of a completely unrelated function to determine whether the scheduler should
be run or not.  This would have caused the scheduler to not run in cases where
it should have.  Also, leave a note about another scheduler issue that needs
to be addressed at some point.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@140061 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -19546,6 +19546,12 @@ static void *do_monitor(void *data)
 		   dialog that was found and destroyed, probably because the list contents would change,
 		   so we'd need to restart. This isn't the best thing to do with callbacks. */
+		/* XXX TODO The scheduler usage in this module does not have sufficient 
+		 * synchronization being done between running the scheduler and places 
+		 * scheduling tasks.  As it is written, any scheduled item may not run 
+		 * any sooner than about  1 second, regardless of whether a sooner time 
+		 * was asked for. */
+
 		pthread_testcancel();
 		/* Wait for sched or io */
 		res = ast_sched_wait(sched);
@@ -19555,11 +19561,9 @@ static void *do_monitor(void *data)
 		if (res > 20)
 			ast_debug(1, "chan_sip: ast_io_wait ran %d all at once\n", res);
 		ast_mutex_lock(&monlock);
-		if (res >= 0)  {
-			res = ast_sched_runq(sched);
-			if (res >= 20)
-				ast_debug(1, "chan_sip: ast_sched_runq ran %d all at once\n", res);
-		}
+		res = ast_sched_runq(sched);
+		if (res >= 20)
+			ast_debug(1, "chan_sip: ast_sched_runq ran %d all at once\n", res);
 		ast_mutex_unlock(&monlock);
 	}