RTEMS Ada 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 or 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 Ada User's Guide
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