include/linux/sched/rt.h

   1 #ifndef _SCHED_RT_H
   2 #define _SCHED_RT_H
   3
   4 #include <linux/sched/prio.h>
   5
   6 static inline int rt_prio(int prio)
   7 {
   8         if (unlikely(prio < MAX_RT_PRIO))
   9                 return 1;
  10         return 0;
  11 }
  12
  13 static inline int rt_task(struct task_struct *p)
  14 {
  15         return rt_prio(p->prio);
  16 }
  17
  18 #ifdef CONFIG_RT_MUTEXES
  19 extern int rt_mutex_getprio(struct task_struct *p);
  20 extern void rt_mutex_setprio(struct task_struct *p, int prio);
  21 extern int rt_mutex_check_prio(struct task_struct *task, int newprio);
  22 extern struct task_struct *rt_mutex_get_top_task(struct task_struct *task);
  23 extern void rt_mutex_adjust_pi(struct task_struct *p);
  24 static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
  25 {
  26         return tsk->pi_blocked_on != NULL;
  27 }
  28 #else
  29 static inline int rt_mutex_getprio(struct task_struct *p)
  30 {
  31         return p->normal_prio;
  32 }
  33
  34 static inline int rt_mutex_check_prio(struct task_struct *task, int newprio)
  35 {
  36         return 0;
  37 }
  38
  39 static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
  40 {
  41         return NULL;
  42 }
  43 # define rt_mutex_adjust_pi(p)          do { } while (0)
  44 static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
  45 {
  46         return false;
  47 }
  48 #endif
  49
  50 extern void normalize_rt_tasks(void);
  51
  52
  53 /*
  54  * default timeslice is 100 msecs (used only for SCHED_RR tasks).
  55  * Timeslices get refilled after they expire.
  56  */
  57 #define RR_TIMESLICE            (100 * HZ / 1000)
  58
  59 #endif /* _SCHED_RT_H */