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Linux/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_get_effective_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_get_effective_prio(struct task_struct *task,
 35                                               int newprio)
 36 {
 37         return newprio;
 38 }
 39 
 40 static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
 41 {
 42         return NULL;
 43 }
 44 # define rt_mutex_adjust_pi(p)          do { } while (0)
 45 static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
 46 {
 47         return false;
 48 }
 49 #endif
 50 
 51 extern void normalize_rt_tasks(void);
 52 
 53 
 54 /*
 55  * default timeslice is 100 msecs (used only for SCHED_RR tasks).
 56  * Timeslices get refilled after they expire.
 57  */
 58 #define RR_TIMESLICE            (100 * HZ / 1000)
 59 
 60 #endif /* _SCHED_RT_H */
 61 

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