1 #ifndef _linux_POSIX_TIMERS_H
2 #define _linux_POSIX_TIMERS_H
3
4 #include <linux/spinlock.h>
5 #include <linux/list.h>
6 #include <linux/sched.h>
7
8 union cpu_time_count {
9 cputime_t cpu;
10 unsigned long long sched;
11 };
12
13 struct cpu_timer_list {
14 struct list_head entry;
15 union cpu_time_count expires, incr;
16 struct task_struct *task;
17 int firing;
18 };
19
20 #define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
21 #define CPUCLOCK_PERTHREAD(clock) \
22 (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
23 #define CPUCLOCK_PID_MASK 7
24 #define CPUCLOCK_PERTHREAD_MASK 4
25 #define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
26 #define CPUCLOCK_CLOCK_MASK 3
27 #define CPUCLOCK_PROF 0
28 #define CPUCLOCK_VIRT 1
29 #define CPUCLOCK_SCHED 2
30 #define CPUCLOCK_MAX 3
31
32 #define MAKE_PROCESS_CPUCLOCK(pid, clock) \
33 ((~(clockid_t) (pid) << 3) | (clockid_t) (clock))
34 #define MAKE_THREAD_CPUCLOCK(tid, clock) \
35 MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK)
36
37 /* POSIX.1b interval timer structure. */
38 struct k_itimer {
39 struct list_head list; /* free/ allocate list */
40 spinlock_t it_lock;
41 clockid_t it_clock; /* which timer type */
42 timer_t it_id; /* timer id */
43 int it_overrun; /* overrun on pending signal */
44 int it_overrun_last; /* overrun on last delivered signal */
45 int it_requeue_pending; /* waiting to requeue this timer */
46 #define REQUEUE_PENDING 1
47 int it_sigev_notify; /* notify word of sigevent struct */
48 int it_sigev_signo; /* signo word of sigevent struct */
49 sigval_t it_sigev_value; /* value word of sigevent struct */
50 struct task_struct *it_process; /* process to send signal to */
51 struct sigqueue *sigq; /* signal queue entry. */
52 union {
53 struct {
54 struct hrtimer timer;
55 ktime_t interval;
56 } real;
57 struct cpu_timer_list cpu;
58 struct {
59 unsigned int clock;
60 unsigned int node;
61 unsigned long incr;
62 unsigned long expires;
63 } mmtimer;
64 } it;
65 };
66
67 struct k_clock {
68 int res; /* in nanoseconds */
69 int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
70 int (*clock_set) (const clockid_t which_clock, struct timespec * tp);
71 int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
72 int (*timer_create) (struct k_itimer *timer);
73 int (*nsleep) (const clockid_t which_clock, int flags,
74 struct timespec *, struct timespec __user *);
75 long (*nsleep_restart) (struct restart_block *restart_block);
76 int (*timer_set) (struct k_itimer * timr, int flags,
77 struct itimerspec * new_setting,
78 struct itimerspec * old_setting);
79 int (*timer_del) (struct k_itimer * timr);
80 #define TIMER_RETRY 1
81 void (*timer_get) (struct k_itimer * timr,
82 struct itimerspec * cur_setting);
83 };
84
85 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
86
87 /* error handlers for timer_create, nanosleep and settime */
88 int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *,
89 struct timespec __user *);
90 int do_posix_clock_nosettime(const clockid_t, struct timespec *tp);
91
92 /* function to call to trigger timer event */
93 int posix_timer_event(struct k_itimer *timr, int si_private);
94
95 int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *ts);
96 int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *ts);
97 int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *ts);
98 int posix_cpu_timer_create(struct k_itimer *timer);
99 int posix_cpu_nsleep(const clockid_t which_clock, int flags,
100 struct timespec *rqtp, struct timespec __user *rmtp);
101 long posix_cpu_nsleep_restart(struct restart_block *restart_block);
102 int posix_cpu_timer_set(struct k_itimer *timer, int flags,
103 struct itimerspec *new, struct itimerspec *old);
104 int posix_cpu_timer_del(struct k_itimer *timer);
105 void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp);
106
107 void posix_cpu_timer_schedule(struct k_itimer *timer);
108
109 void run_posix_cpu_timers(struct task_struct *task);
110 void posix_cpu_timers_exit(struct task_struct *task);
111 void posix_cpu_timers_exit_group(struct task_struct *task);
112
113 void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,
114 cputime_t *newval, cputime_t *oldval);
115
116 long clock_nanosleep_restart(struct restart_block *restart_block);
117
118 #endif
119
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