RTEMS Ada User's Guide
In general, an attribute set is built by a bitwise OR of the desired attribute components. The set of valid region attributes is provided in the following table:
RTEMS.FIFO - tasks wait by FIFO (default)
RTEMS.PRIORITY - tasks wait by priority
Attribute values are specifically designed to be
mutually exclusive, therefore bitwise OR and addition operations
are equivalent as long as each attribute appears exactly once in
the component list. An attribute listed as a default is not
required to appear in the attribute list, although it is a good
programming practice to specify default attributes. If all
defaults are desired, the attribute
RTEMS.DEFAULT_ATTRIBUTES should be
specified on this call.
This example demonstrates the attribute_set parameter
needed to create a region with the task priority waiting queue
discipline. The attribute_set parameter to the
rtems.region_create
directive should be RTEMS.PRIORITY.
RTEMS Ada User's Guide
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