sd-event: introduce event_source_disable()

src/libsystemd/sd-event/event-util.c

@@ -80,3 +80,10 @@ int event_reset_time(
 
         return created;
 }
+
+int event_source_disable(sd_event_source *s) {
+        if (!s)
+                return 0;
+
+        return sd_event_source_set_enabled(s, SD_EVENT_OFF);
+}

src/libsystemd/sd-event/event-util.h

@@ -9,3 +9,4 @@ int event_reset_time(sd_event *e, sd_event_source **s,
                      clockid_t clock, uint64_t usec, uint64_t accuracy,
                      sd_event_time_handler_t callback, void *userdata,
                      int64_t priority, const char *description, bool force_reset);
+int event_source_disable(sd_event_source *s);