- poll-for-message #!key (bus session-bus) (timeout 0)procedure
Check once whether any incoming D-Bus message is waiting on a particular bus, and if so, dispatch it to the appropriate callback (which you have previously registered using register-method or register-signal-handler). Returns #t if it received a message, #f if not. The optional timeout parameter is an integer that indicates the maximum time in milliseconds to block waiting for messages.