*
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
* SR_ERR_MALLOC upon memory allocation errors.
*/
SR_API int sr_session_source_add(int fd, int events, int timeout,
*
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
* SR_ERR_MALLOC upon memory allocation errors.
*/
SR_API int sr_session_source_add(int fd, int events, int timeout,