#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 timer_list timer; struct list_head abs_timer_entry; /* clock abs_timer_list */ struct timespec wall_to_prev; /* wall_to_monotonic used when set */ unsigned long incr; /* interval in jiffies */ } real; struct cpu_timer_list cpu; struct { unsigned int clock; unsigned int node; unsigned long incr; unsigned long expires; } mmtimer; } it; }; struct k_clock_abs { struct list_head list; spinlock_t lock; }; struct k_clock { int res; /* in nano seconds */ int (*clock_getres) (clockid_t which_clock, struct timespec *tp); struct k_clock_abs *abs_struct; int (*clock_set) (clockid_t which_clock, struct timespec * tp); int (*clock_get) (clockid_t which_clock, struct timespec * tp); int (*timer_create) (struct k_itimer *timer); int (*nsleep) (clockid_t which_clock, int flags, struct timespec *); 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(clockid_t clock_id, struct k_clock *new_clock); /* Error handlers for timer_create, nanosleep and settime */ int do_posix_clock_notimer_create(struct k_itimer *timer); int do_posix_clock_nonanosleep(clockid_t, int flags, struct timespec *); int do_posix_clock_nosettime(clockid_t, struct timespec *tp); /* function to call to trigger timer event */ int posix_timer_event(struct k_itimer *timr, int si_private); struct now_struct { unsigned long jiffies; }; #define posix_get_now(now) (now)->jiffies = jiffies; #define posix_time_before(timer, now) \ time_before((timer)->expires, (now)->jiffies) #define posix_bump_timer(timr, now) \ do { \ long delta, orun; \ delta = now.jiffies - (timr)->it.real.timer.expires; \ if (delta >= 0) { \ orun = 1 + (delta / (timr)->it.real.incr); \ (timr)->it.real.timer.expires += \ orun * (timr)->it.real.incr; \ (timr)->it_overrun += orun; \ } \ }while (0) int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *); int posix_cpu_clock_get(clockid_t which_clock, struct timespec *); int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp); int posix_cpu_timer_create(struct k_itimer *); int posix_cpu_nsleep(clockid_t, int, struct timespec *); int posix_cpu_timer_set(struct k_itimer *, int, struct itimerspec *, struct itimerspec *); int posix_cpu_timer_del(struct k_itimer *); void posix_cpu_timer_get(struct k_itimer *, struct itimerspec *); void posix_cpu_timer_schedule(struct k_itimer *); void run_posix_cpu_timers(struct task_struct *); void posix_cpu_timers_exit(struct task_struct *); void posix_cpu_timers_exit_group(struct task_struct *); void set_process_cpu_timer(struct task_struct *, unsigned int, cputime_t *, cputime_t *); #endif