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
  21extern int rt_mutex_getprio(struct task_struct *p);
  22extern void rt_mutex_setprio(struct task_struct *p, int prio);
  23extern int rt_mutex_get_effective_prio(struct task_struct *task, int newprio);
  24extern struct task_struct *rt_mutex_get_top_task(struct task_struct *task);
  25extern void rt_mutex_adjust_pi(struct task_struct *p);
  26static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
  27{
  28        return tsk->pi_blocked_on != NULL;
  29}
  30#else
  31static inline int rt_mutex_getprio(struct task_struct *p)
  32{
  33        return p->normal_prio;
  34}
  35
  36static inline int rt_mutex_get_effective_prio(struct task_struct *task,
  37                                              int newprio)
  38{
  39        return newprio;
  40}
  41
  42static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
  43{
  44        return NULL;
  45}
  46# define rt_mutex_adjust_pi(p)          do { } while (0)
  47static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
  48{
  49        return false;
  50}
  51#endif
  52
  53extern void normalize_rt_tasks(void);
  54
  55
  56/*
  57 * default timeslice is 100 msecs (used only for SCHED_RR tasks).
  58 * Timeslices get refilled after they expire.
  59 */
  60#define RR_TIMESLICE            (100 * HZ / 1000)
  61
  62#endif /* _LINUX_SCHED_RT_H */
  63