change switch_core_timer_next to return switch_status_t, update all users to new usage, add some error checking to mod_conference so that it bails out of the loops more gracefully on shutdown.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4454 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_conference/mod_conference.c

@@ -676,7 +676,10 @@ static void *SWITCH_THREAD_FUNC conference_thread_run(switch_thread_t *thread, v
 		switch_size_t file_data_len = samples * 2;
 
 		/* Sync the conference to a single timing source */
-		switch_core_timer_next(&timer);
+		if (switch_core_timer_next(&timer) != SWITCH_STATUS_SUCCESS) {
+			switch_set_flag(conference, CFLAG_DESTRUCT);
+			break;
+		}
 		switch_mutex_lock(conference->mutex);
 		ready = 0;
 
@@ -1659,7 +1662,9 @@ static void conference_loop_output(conference_member_t *member)
 			} 
 		}
 
-		switch_core_timer_next(&timer);
+		if (switch_core_timer_next(&timer) != SWITCH_STATUS_SUCCESS) {
+			break;
+		}
 
 	} /* Rinse ... Repeat */
 

src/mod/endpoints/mod_portaudio/mod_portaudio.c

@@ -623,7 +623,7 @@ static switch_status_t channel_read_frame(switch_core_session_t *session, switch
 
         {
             switch_size_t olen = globals.read_codec.implementation->samples_per_frame;
-			if (switch_core_timer_next(&tech_pvt->timer) < 0) {
+			if (switch_core_timer_next(&tech_pvt->timer) != SWITCH_STATUS_SUCCESS) {
                 switch_core_file_close(&tech_pvt->fh);
                 switch_core_codec_destroy(&tech_pvt->write_codec);
                 goto cng;

src/mod/languages/mod_spidermonkey_teletone/mod_spidermonkey_teletone.c

@@ -273,7 +273,7 @@ static JSBool teletone_generate(JSContext *cx, JSObject *obj, uintN argc, jsval
 			}
 			
 			if (tto->timer) {
-				if (switch_core_timer_next(tto->timer)< 0) {
+				if (switch_core_timer_next(tto->timer) != SWITCH_STATUS_SUCCESS) {
 					break;
 				}