RTEMS Ada User's Guide
In general, an option is built by a bitwise OR of the
desired option components. The set of valid options for the
rtems.message_queue_receive directive are
listed in the following table:
RTEMS.WAIT - task will wait for a message (default)
RTEMS.NO_WAIT - task should not wait
An option listed as a default is not required to
appear in the option OR list, although it is a good programming
practice to specify default options. If all defaults are
desired, the option RTEMS.DEFAULT_OPTIONS should
be specified on this call.
This example demonstrates the option parameter needed
to poll for a message to arrive. The option parameter passed to
the rtems.message_queue_receive directive should
be RTEMS.NO_WAIT.
RTEMS Ada User's Guide
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