mirror of
https://github.com/morgan9e/systemd
synced 2026-04-15 17:06:39 +09:00
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
#pragma once
|
|
|
|
#include <sched.h>
|
|
|
|
/* Match values uses by the kernel internally, as no public header seems to exist. */
|
|
|
|
#ifndef IOPRIO_N_CLASSES
|
|
# define IOPRIO_N_CLASSES 8
|
|
#endif
|
|
|
|
#ifndef IOPRIO_BE_NR
|
|
# define IOPRIO_BE_NR 8
|
|
#endif
|
|
|
|
#ifndef IOPRIO_CLASS_NONE
|
|
# define IOPRIO_CLASS_NONE 0
|
|
#endif
|
|
#ifndef IOPRIO_CLASS_RT
|
|
# define IOPRIO_CLASS_RT 1
|
|
#endif
|
|
#ifndef IOPRIO_CLASS_BE
|
|
# define IOPRIO_CLASS_BE 2
|
|
#endif
|
|
#ifndef IOPRIO_CLASS_IDLE
|
|
# define IOPRIO_CLASS_IDLE 3
|
|
#endif
|
|
|
|
#ifndef IOPRIO_WHO_PROCESS
|
|
# define IOPRIO_WHO_PROCESS 1
|
|
#endif
|
|
#ifndef IOPRIO_WHO_PGRP
|
|
# define IOPRIO_WHO_PGRP 2
|
|
#endif
|
|
#ifndef IOPRIO_WHO_USER
|
|
# define IOPRIO_WHO_USER 3
|
|
#endif
|
|
|
|
#ifndef IOPRIO_BITS
|
|
# define IOPRIO_BITS 16
|
|
#endif
|
|
#ifndef IOPRIO_N_CLASSES
|
|
# define IOPRIO_N_CLASSES 8
|
|
#endif
|
|
#ifndef IOPRIO_CLASS_SHIFT
|
|
# define IOPRIO_CLASS_SHIFT 13
|
|
#endif
|
|
|
|
static inline int ioprio_prio_class(int value) {
|
|
return value >> IOPRIO_CLASS_SHIFT;
|
|
}
|
|
|
|
static inline int ioprio_prio_data(int value) {
|
|
return value & ((1 << IOPRIO_CLASS_SHIFT) - 1);
|
|
}
|
|
|
|
static inline int ioprio_prio_value(int class, int data) {
|
|
return (class << IOPRIO_CLASS_SHIFT) | data;
|
|
}
|