int ust_registry_channel_add(struct ust_registry_session *session,
uint64_t key);
void ust_registry_channel_del_free(struct ust_registry_session *session,
int ust_registry_channel_add(struct ust_registry_session *session,
uint64_t key);
void ust_registry_channel_del_free(struct ust_registry_session *session,