RTEMS C 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_region_get_segment directive are
listed in the following table:
RTEMS_WAIT - task will wait for segment (default)
RTEMS_NO_WAIT - task should not wait
Option values are specifically designed to be
mutually exclusive, therefore bitwise OR and addition operations
are equivalent as long as each option appears exactly once in
the component list. An option listed as a default is not
required to appear in the option 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 segment. The option parameter passed to the
rtems_region_get_segment directive should
be RTEMS_NO_WAIT.
RTEMS C User's Guide
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