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#ifndef _linux_POSIX_TIMERS_H

#define _linux_POSIX_TIMERS_H

#include <linux/spinlock.h>

#include <linux/list.h>

#include <linux/sched.h>

union cpu_time_count {

        cputime_t cpu;

        unsigned long long sched;

};

struct cpu_timer_list {

        struct list_head entry;

        union cpu_time_count expires, incr;

        struct task_struct *task;

        int firing;

};

#define CPUCLOCK_PID(clock)             ((pid_t) ~((clock) >> 3))

#define CPUCLOCK_PERTHREAD(clock) \

        (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)

#define CPUCLOCK_PID_MASK       7

#define CPUCLOCK_PERTHREAD_MASK 4

#define CPUCLOCK_WHICH(clock)   ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)

#define CPUCLOCK_CLOCK_MASK     3

#define CPUCLOCK_PROF           0

#define CPUCLOCK_VIRT           1

#define CPUCLOCK_SCHED          2

#define CPUCLOCK_MAX            3

#define MAKE_PROCESS_CPUCLOCK(pid, clock) \

        ((~(clockid_t) (pid) << 3) | (clockid_t) (clock))

#define MAKE_THREAD_CPUCLOCK(tid, clock) \

        MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK)

/* POSIX.1b interval timer structure. */

struct k_itimer {

        struct list_head list;          /* free/ allocate list */

        spinlock_t it_lock;

        clockid_t it_clock;             /* which timer type */

        timer_t it_id;                  /* timer id */

        int it_overrun;                 /* overrun on pending signal  */

        int it_overrun_last;            /* overrun on last delivered signal */

        int it_requeue_pending;         /* waiting to requeue this timer */

#define REQUEUE_PENDING 1

        int it_sigev_notify;            /* notify word of sigevent struct */

        int it_sigev_signo;             /* signo word of sigevent struct */

        sigval_t it_sigev_value;        /* value word of sigevent struct */

        struct task_struct *it_process; /* process to send signal to */

        struct sigqueue *sigq;          /* signal queue entry. */

        union {

                struct {

                        struct hrtimer timer;

                        ktime_t interval;

                } real;

                struct cpu_timer_list cpu;

                struct {

                        unsigned int clock;

                        unsigned int node;

                        unsigned long incr;

                        unsigned long expires;

                } mmtimer;

        } it;

};

struct k_clock {

        int res;                /* in nanoseconds */

        int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);

        int (*clock_set) (const clockid_t which_clock, struct timespec * tp);

        int (*clock_get) (const clockid_t which_clock, struct timespec * tp);

        int (*timer_create) (struct k_itimer *timer);

        int (*nsleep) (const clockid_t which_clock, int flags,

                       struct timespec *, struct timespec __user *);

        long (*nsleep_restart) (struct restart_block *restart_block);

        int (*timer_set) (struct k_itimer * timr, int flags,

                          struct itimerspec * new_setting,

                          struct itimerspec * old_setting);

        int (*timer_del) (struct k_itimer * timr);

#define TIMER_RETRY 1

        void (*timer_get) (struct k_itimer * timr,

                           struct itimerspec * cur_setting);

};

void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);

/* error handlers for timer_create, nanosleep and settime */

int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *,

                               struct timespec __user *);

int do_posix_clock_nosettime(const clockid_t, struct timespec *tp);

/* function to call to trigger timer event */

int posix_timer_event(struct k_itimer *timr, int si_private);

int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *ts);

int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *ts);

int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *ts);

int posix_cpu_timer_create(struct k_itimer *timer);

int posix_cpu_nsleep(const clockid_t which_clock, int flags,

                     struct timespec *rqtp, struct timespec __user *rmtp);

long posix_cpu_nsleep_restart(struct restart_block *restart_block);

int posix_cpu_timer_set(struct k_itimer *timer, int flags,

                        struct itimerspec *new, struct itimerspec *old);

int posix_cpu_timer_del(struct k_itimer *timer);

void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp);

void posix_cpu_timer_schedule(struct k_itimer *timer);

void run_posix_cpu_timers(struct task_struct *task);

void posix_cpu_timers_exit(struct task_struct *task);

void posix_cpu_timers_exit_group(struct task_struct *task);

void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,

                           cputime_t *newval, cputime_t *oldval);

long clock_nanosleep_restart(struct restart_block *restart_block);

#endif