diff options
Diffstat (limited to 'include/linux/posix-timers.h')
| -rw-r--r-- | include/linux/posix-timers.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h new file mode 100644 index 000000000000..f942e2bad8e3 --- /dev/null +++ b/include/linux/posix-timers.h @@ -0,0 +1,139 @@ +#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 |