_public_ int sd_bus_track_add_name(sd_bus_track *track, const char *name) {
_cleanup_bus_slot_unref_ sd_bus_slot *slot = NULL;
_cleanup_free_ char *n = NULL;
const char *match;
int r;
assert_return(track, -EINVAL);
assert_return(service_name_is_valid(name), -EINVAL);
r = hashmap_ensure_allocated(&track->names, &string_hash_ops);
if (r < 0)
return r;
n = strdup(name);
if (!n)
return -ENOMEM;
/* First, subscribe to this name */
match = MATCH_FOR_NAME(n);
r = sd_bus_add_match(track->bus, &slot, match, on_name_owner_changed, track);
if (r < 0)
return r;
r = hashmap_put(track->names, n, slot);
if (r == -EEXIST)
return 0;
if (r < 0)
return r;
/* Second, check if it is currently existing, or maybe
* doesn't, or maybe disappeared already. */
r = sd_bus_get_name_creds(track->bus, n, 0, NULL);
if (r < 0) {
hashmap_remove(track->names, n);
return r;
}
n = NULL;
slot = NULL;
bus_track_remove_from_queue(track);
track->modified = true;
return 1;
}
_public_ sd_bus_track* sd_bus_track_unref(sd_bus_track *track) {
if (!track)
return NULL;
assert(track->n_ref > 0);
if (track->n_ref > 1) {
track->n_ref--;
return NULL;
}
if (track->in_list)
LIST_REMOVE(tracks, track->bus->tracks, track);
bus_track_remove_from_queue(track);
hashmap_free_with_destructor(track->names, track_item_free);
sd_bus_unref(track->bus);
return mfree(track);
}
void bus_track_dispatch(sd_bus_track *track) {
int r;
assert(track);
assert(track->in_queue);
assert(track->handler);
bus_track_remove_from_queue(track);
sd_bus_track_ref(track);
r = track->handler(track, track->userdata);
if (r < 0)
log_debug_errno(r, "Failed to process track handler: %m");
else if (r == 0)
bus_track_add_to_queue(track);
sd_bus_track_unref(track);
}
_public_ sd_bus_track* sd_bus_track_unref(sd_bus_track *track) {
const char *n;
if (!track)
return NULL;
assert(track->n_ref > 0);
if (track->n_ref > 1) {
track->n_ref --;
return NULL;
}
while ((n = hashmap_first_key(track->names)))
sd_bus_track_remove_name(track, n);
bus_track_remove_from_queue(track);
hashmap_free(track->names);
sd_bus_unref(track->bus);
free(track);
return NULL;
}
