LXR linux/include/linux/sched/rt.h

   1#ifndef _LINUX_SCHED_RT_H
   2#define _LINUX_SCHED_RT_H
   3
   4#include <linux/sched.h>
   5
   6struct task_struct;
   7
   8static inline int rt_prio(int prio)
   9{
  10        if (unlikely(prio < MAX_RT_PRIO))
  11                return 1;
  12        return 0;
  13}
  14
  15static inline int rt_task(struct task_struct *p)
  16{
  17        return rt_prio(p->prio);
  18}
  19
  20#ifdef CONFIG_RT_MUTEXES
  21/*
  22 * Must hold either p->pi_lock or task_rq(p)->lock.
  23 */
  24static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p)
  25{
  26        return p->pi_top_task;
  27}
  28extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task);
  29extern void rt_mutex_adjust_pi(struct task_struct *p);
  30static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
  31{
  32        return tsk->pi_blocked_on != NULL;
  33}
  34#else
  35static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
  36{
  37        return NULL;
  38}
  39# define rt_mutex_adjust_pi(p)          do { } while (0)
  40static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
  41{
  42        return false;
  43}
  44#endif
  45
  46extern void normalize_rt_tasks(void);
  47
  48
  49/*
  50 * default timeslice is 100 msecs (used only for SCHED_RR tasks).
  51 * Timeslices get refilled after they expire.
  52 */
  53#define RR_TIMESLICE            (100 * HZ / 1000)
  54
  55#endif /* _LINUX_SCHED_RT_H */
  56