* This function gets called from para_server to determine the timeout value
* for its main select loop.
*
+ * \param rfds The set of file descriptors to be checked for reading.
+ * \param wfds The set of file descriptors to be checked for writing.
+ * \param max_fileno The highest-numbered file descriptor.
+ *
* Before the timeout is computed, the current vss status flags are evaluated
* and acted upon by calling appropriate functions from the lower layers.
* Possible actions include