RTEMS C User's Guide
A task can receive all of the currently pending
events by calling the rtems_event_receive
directive with a value of RTEMS_ALL_EVENTS
for the input event condition and
RTEMS_NO_WAIT | RTEMS_EVENT_ANY
for the option set. The pending events are returned to the
calling task and the event set is cleared. If no events are
pending then the RTEMS_UNSATISFIED status code will be returned.
RTEMS C User's Guide
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