rtapi_prio, rtapi_prio_highest, rtapi_prio_lowest, rtapi_prio_next_higher, rtapi_prio_next_lower - thread priority functions
int
rtapi_prio_highest();
int rtapi_prio_lowest();
int rtapi_prio_next_higher(int _prio_);
int rtapi_prio_next_lower(int _prio_);
prio
A value returned by a prior rtapi_prio_xxx call
The rtapi_prio_xxxx functions provide a portable way to set task priority. The mapping of actual priority to priority number depends on the RTOS. Priorities range from rtapi_prio_lowest to rtapi_prio_highest, inclusive. To use this API, use one of two methods:
1. Set your lowest priority task to rtapi_prio_lowest, and for each task of the next lowest priority, set their priorities to rtapi_prio_next_higher(previous).
2. Set your highest priority task to rtapi_prio_highest, and for each task of the next highest priority, set their priorities to rtapi_prio_next_lower(previous).
N.B.: A high priority task will preempt or interrupt a lower priority task. Linux is always the lowest priority!
Call these functions only from within init/cleanup code, not from realtime tasks.
Returns an opaque real-time priority number.
rtapi_task_new(3rtapi)