sched_rr_get_interval (original) (raw)

The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

A newer edition of this document exists here

NAME

sched_rr_get_interval - get execution time limits (REALTIME)

SYNOPSIS

`[PS|TPS] #include <sched.h>

int sched_rr_get_interval(pid_t

pid, struct timespec *interval); `

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.

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.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

sched_getparam(), sched_get_priority_max(), sched_getscheduler(), sched_setparam(), sched_setscheduler(), the Base Definitions volume of IEEE Std 1003.1-2001, <sched.h>

CHANGE HISTORY

First released in Issue 5. Included for alignment with the POSIX Realtime Extension.

Issue 6

The sched_rr_get_interval() function is marked as part of the Process Scheduling option.

The [ENOSYS] error condition has been removed as stubs need not be provided if an implementation does not support the Process Scheduling option.

IEEE Std 1003.1-2001/Cor 1-2002, XSH/TC1/D6/53 is applied, changing the PS margin code in the SYNOPSIS to PS|TPS.

End of informative text.

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