RTEMS 4.0.0 On-Line Library

Rate Monotonic Manager Manipulating a Period

RTEMS C User's Guide

18.3.2: Manipulating a Period

The rtems_rate_monotonic_period directive is used to establish and maintain periodic execution utilizing a previously created rate monotonic period. Once initiated by the rtems_rate_monotonic_period directive, the period is said to run until it either expires or is reinitiated. The state of the rate monotonic period results in one of the following scenarios:

If the rate monotonic period is running, the calling task will be blocked for the remainder of the outstanding period and, upon completion of that period, the period will be reinitiated with the specified period.
If the rate monotonic period is not currently running and has not expired, it is initiated with a length of period ticks and the calling task returns immediately.
If the rate monotonic period has expired before the task invokes the rtems_rate_monotonic_period directive, the period will be initiated with a length of period ticks and the calling task returns immediately with a timeout error status.

RTEMS C User's Guide