sched_rr_get_interval¶

Synopsis¶

#include <sched.h>

int sched_rr_get_interval(pid_t pid, struct timespec *interval);

Status¶

Implemented

Conformance¶

IEEE Std 1003.1-2017

Description¶

The sched_rr_get_interval() function shall update the timespec structure referenced by the interval argument to contain the current execution time limit (that is, time quantum) for the process specified by pid. If pid is zero, the current execution time limit for the calling process shall be returned.

In Phoenix-RTOS the time quantum is the period of the kernel system tick (SYSTICK_INTERVAL), which is the same for all threads and depends on the target platform, e.g. 10 ms on ia32 and 1 ms on ARM targets. A negative pid or a NULL interval is rejected with EINVAL.

Return value¶

If successful, the sched_rr_get_interval() function shall return zero. Otherwise, it shall return a value of -1 and set errno to indicate the error.

Errors¶

The sched_rr_get_interval() function shall fail if:

ESRCH - No process can be found corresponding to that specified by pid.

POSIX deviations¶

No POSIX deviations discovered.