RTEMS C User's Guide
When a region is created, RTEMS generates a unique
region ID and assigns it to the created region until it is
deleted. The region ID may be obtained by either of two
methods. First, as the result of an invocation of the
rtems_region_create directive,
the region ID is stored in a user
provided location. Second, the region ID may be obtained later
using the rtems_region_ident directive.
The region ID is used by other region manager directives to
access this region.
RTEMS C User's Guide
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