SR_API int sr_session_source_add(int fd, int events, int timeout,
sr_receive_data_callback_t cb, void *cb_data);
SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout,
SR_API int sr_session_source_add(int fd, int events, int timeout,
sr_receive_data_callback_t cb, void *cb_data);
SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout,