-/**
- *
- *
- * deactivate the receiver
- *
- * Clean up what init has allocated.
- */
- void (*shutdown)(void);
-/**
- *
- *
- * add file descriptors to fd_sets and compute timeout for select(2)
- *
- * The pre_select function gets called from the driving application before
- * entering its select loop. The receiver may use this hook to add any file
- * descriptors to \a rfds and \a wfds in order to check the result later in the
- * post_select hook.
- *
- * \a timeout is a value-result parameter, initially containing the timeout for
- * select() which was set by the application or by another receiver node. If
- * the receiver wants its pre_select function to be called at some earlier time
- * than the time determined by \a timeout, it may set \a timeout to an
- * appropriate smaller value. However, it must never increase this timeout.
- *
- * This function must return the highest-numbered descriptor it wants to being
- * checked, or -1 if no file descriptors should be checked for this run.
- *
- * \sa select(2), receiver_node:private_data, time.c
- */
- int (*pre_select)(struct receiver_node *rn, fd_set *rfds,
- fd_set *wfds, struct timeval *timeout);
-/**
- *
- *
- * evaluate the result from select()
- *
- * If the call to select() was succesful, this hook gets called. It should
- * check all file descriptors which were added to any of the the fd sets during
- * the previous call to pre_select. According to the result, it may then use
- * any non-blocking I/O to establish a connection or to receive the audio data.
- *
- * A negative return value is interpreted as an error.
- *
- * \sa select(2), struct receiver
- */
- int (*post_select)(struct receiver_node *rn, int select_ret,
- fd_set *rfds, fd_set *wfds);
+ /** Ask the scheduler to monitor receive fds. */
+ void (*pre_monitor)(struct sched *s, void *context);
+ /** Receive data and make it available to consumers. */
+ int (*post_monitor)(struct sched *s, void *context);
+ /**
+ * Answer a buffer tree query.
+ *
+ * This optional function pointer allows for inter node communication
+ * of the buffer tree nodes. See \ref btr_command_handler for details.
+ */
+ btr_command_handler execute;