SCHED_GET_PRIORITY_MAX(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
sched_get_priority_max, sched_get_priority_min — get priority limits (REALTIME)

SYNOPSIS

#include <sched.h>

int sched_get_priority_max(int policy);
int sched_get_priority_min(int policy);

DESCRIPTION
The sched_get_priority_max() and sched_get_priority_min() functions shall return the appropriate maximum or minimum, respectively, for the scheduling policy specified by policy.

The value of policy shall be one of the scheduling policy values defined in <sched.h>.

RETURN VALUE
If successful, the sched_get_priority_max() and sched_get_priority_min() functions shall return the appropriate maximum or minimum values, respectively. If unsuccessful, they shall return a value of -1 and set errno to indicate the error.

ERRORS
The sched_get_priority_max() and sched_get_priority_min() functions shall fail if:

EINVAL
    The value of the policy parameter does not represent a defined scheduling policy.

The following sections are informative.

EXAMPLES
None.

APPLICATION USAGE
None.

RATIONALE
None.

FUTURE DIRECTIONS
None.

SEE ALSO
sched_getparam(), sched_setparam(), sched_getscheduler(), sched_rr_get_interval(), sched_setscheduler()

The Base Definitions volume of POSIX.1-2017, <sched.h>

COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

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