xtos_rt_set_scheduler

Calls sched_setscheduler for the calling thread with a Linux policy and static priority.

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Declaration

#include <xtos/rt.h>

int xtos_rt_set_scheduler(int policy, int priority);

Parameter	Type	Description
policy	int	A Linux scheduler policy such as SCHED_OTHER, SCHED_FIFO, or SCHED_RR; the kernel supplies its valid range.
priority	int	The policy’s static priority; SCHED_OTHER normally requires 0. It is not a nice value.

Returns 0 on success and -1 on failure.

errno	Condition
EINVAL	The policy is invalid, its priority range cannot be queried, or priority is outside that range.
EPERM	The calling thread lacks permission to set the requested real-time policy or priority.
system errno	Returns errno from sched_get_priority_* or sched_setscheduler when those calls fail.

Changes only the calling thread; configuring the main thread does not reconfigure existing workers.
The function does not implement deadline-specific parameters or rollback. Linux permissions and resource limits decide whether the change is allowed.

This reference describes headers and implementation at OpenXTOS commit dd313955ad57542bcd2af8827157d1bbd0cf5e83.