140 lines
4.6 KiB
C
140 lines
4.6 KiB
C
#ifndef _linux_POSIX_TIMERS_H
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#define _linux_POSIX_TIMERS_H
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/sched.h>
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union cpu_time_count {
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cputime_t cpu;
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unsigned long long sched;
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};
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struct cpu_timer_list {
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struct list_head entry;
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union cpu_time_count expires, incr;
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struct task_struct *task;
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int firing;
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};
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#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
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#define CPUCLOCK_PERTHREAD(clock) \
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(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
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#define CPUCLOCK_PID_MASK 7
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#define CPUCLOCK_PERTHREAD_MASK 4
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#define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
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#define CPUCLOCK_CLOCK_MASK 3
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#define CPUCLOCK_PROF 0
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#define CPUCLOCK_VIRT 1
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#define CPUCLOCK_SCHED 2
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#define CPUCLOCK_MAX 3
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#define MAKE_PROCESS_CPUCLOCK(pid, clock) \
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((~(clockid_t) (pid) << 3) | (clockid_t) (clock))
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#define MAKE_THREAD_CPUCLOCK(tid, clock) \
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MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK)
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/* POSIX.1b interval timer structure. */
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struct k_itimer {
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struct list_head list; /* free/ allocate list */
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spinlock_t it_lock;
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clockid_t it_clock; /* which timer type */
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timer_t it_id; /* timer id */
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int it_overrun; /* overrun on pending signal */
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int it_overrun_last; /* overrun on last delivered signal */
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int it_requeue_pending; /* waiting to requeue this timer */
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#define REQUEUE_PENDING 1
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int it_sigev_notify; /* notify word of sigevent struct */
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int it_sigev_signo; /* signo word of sigevent struct */
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sigval_t it_sigev_value; /* value word of sigevent struct */
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struct task_struct *it_process; /* process to send signal to */
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struct sigqueue *sigq; /* signal queue entry. */
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union {
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struct {
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struct timer_list timer;
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struct list_head abs_timer_entry; /* clock abs_timer_list */
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struct timespec wall_to_prev; /* wall_to_monotonic used when set */
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unsigned long incr; /* interval in jiffies */
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} real;
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struct cpu_timer_list cpu;
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struct {
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unsigned int clock;
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unsigned int node;
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unsigned long incr;
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unsigned long expires;
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} mmtimer;
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} it;
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};
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struct k_clock_abs {
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struct list_head list;
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spinlock_t lock;
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};
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struct k_clock {
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int res; /* in nano seconds */
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int (*clock_getres) (clockid_t which_clock, struct timespec *tp);
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struct k_clock_abs *abs_struct;
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int (*clock_set) (clockid_t which_clock, struct timespec * tp);
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int (*clock_get) (clockid_t which_clock, struct timespec * tp);
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int (*timer_create) (struct k_itimer *timer);
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int (*nsleep) (clockid_t which_clock, int flags, struct timespec *);
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int (*timer_set) (struct k_itimer * timr, int flags,
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struct itimerspec * new_setting,
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struct itimerspec * old_setting);
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int (*timer_del) (struct k_itimer * timr);
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#define TIMER_RETRY 1
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void (*timer_get) (struct k_itimer * timr,
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struct itimerspec * cur_setting);
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};
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void register_posix_clock(clockid_t clock_id, struct k_clock *new_clock);
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/* Error handlers for timer_create, nanosleep and settime */
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int do_posix_clock_notimer_create(struct k_itimer *timer);
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int do_posix_clock_nonanosleep(clockid_t, int flags, struct timespec *);
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int do_posix_clock_nosettime(clockid_t, struct timespec *tp);
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/* function to call to trigger timer event */
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int posix_timer_event(struct k_itimer *timr, int si_private);
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struct now_struct {
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unsigned long jiffies;
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};
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#define posix_get_now(now) (now)->jiffies = jiffies;
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#define posix_time_before(timer, now) \
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time_before((timer)->expires, (now)->jiffies)
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#define posix_bump_timer(timr, now) \
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do { \
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long delta, orun; \
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delta = now.jiffies - (timr)->it.real.timer.expires; \
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if (delta >= 0) { \
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orun = 1 + (delta / (timr)->it.real.incr); \
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(timr)->it.real.timer.expires += \
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orun * (timr)->it.real.incr; \
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(timr)->it_overrun += orun; \
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} \
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}while (0)
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int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *);
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int posix_cpu_clock_get(clockid_t which_clock, struct timespec *);
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int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp);
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int posix_cpu_timer_create(struct k_itimer *);
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int posix_cpu_nsleep(clockid_t, int, struct timespec *);
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int posix_cpu_timer_set(struct k_itimer *, int,
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struct itimerspec *, struct itimerspec *);
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int posix_cpu_timer_del(struct k_itimer *);
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void posix_cpu_timer_get(struct k_itimer *, struct itimerspec *);
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void posix_cpu_timer_schedule(struct k_itimer *);
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void run_posix_cpu_timers(struct task_struct *);
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void posix_cpu_timers_exit(struct task_struct *);
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void posix_cpu_timers_exit_group(struct task_struct *);
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void set_process_cpu_timer(struct task_struct *, unsigned int,
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cputime_t *, cputime_t *);
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#endif
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