85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_SCHED_RT_H
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#define _LINUX_SCHED_RT_H
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#include <linux/sched.h>
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struct task_struct;
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static inline bool rt_prio(int prio)
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{
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return unlikely(prio < MAX_RT_PRIO && prio >= MAX_DL_PRIO);
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}
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static inline bool rt_or_dl_prio(int prio)
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{
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return unlikely(prio < MAX_RT_PRIO);
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}
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/*
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* Returns true if a task has a priority that belongs to RT class. PI-boosted
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* tasks will return true. Use rt_policy() to ignore PI-boosted tasks.
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*/
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static inline bool rt_task(struct task_struct *p)
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{
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return rt_prio(p->prio);
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}
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/*
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* Returns true if a task has a priority that belongs to RT or DL classes.
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* PI-boosted tasks will return true. Use rt_or_dl_task_policy() to ignore
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* PI-boosted tasks.
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*/
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static inline bool rt_or_dl_task(struct task_struct *p)
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{
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return rt_or_dl_prio(p->prio);
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}
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/*
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* Returns true if a task has a policy that belongs to RT or DL classes.
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* PI-boosted tasks will return false.
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*/
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static inline bool rt_or_dl_task_policy(struct task_struct *tsk)
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{
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int policy = tsk->policy;
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if (policy == SCHED_FIFO || policy == SCHED_RR)
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return true;
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if (policy == SCHED_DEADLINE)
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return true;
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return false;
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}
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#ifdef CONFIG_RT_MUTEXES
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extern void rt_mutex_pre_schedule(void);
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extern void rt_mutex_schedule(void);
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extern void rt_mutex_post_schedule(void);
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/*
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* Must hold either p->pi_lock or task_rq(p)->lock.
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*/
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static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p)
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{
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return p->pi_top_task;
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}
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extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task);
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extern void rt_mutex_adjust_pi(struct task_struct *p);
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#else
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static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
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{
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return NULL;
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}
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# define rt_mutex_adjust_pi(p) do { } while (0)
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#endif
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extern void normalize_rt_tasks(void);
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/*
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* default timeslice is 100 msecs (used only for SCHED_RR tasks).
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* Timeslices get refilled after they expire.
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*/
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#define RR_TIMESLICE (100 * HZ / 1000)
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#endif /* _LINUX_SCHED_RT_H */
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