119 lines
4.1 KiB
C
119 lines
4.1 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 hrtimer timer;
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ktime_t interval;
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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 {
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int res; /* in nanoseconds */
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int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
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int (*clock_set) (const clockid_t which_clock, struct timespec * tp);
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int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
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int (*timer_create) (struct k_itimer *timer);
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int (*nsleep) (const clockid_t which_clock, int flags,
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struct timespec *, struct timespec __user *);
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long (*nsleep_restart) (struct restart_block *restart_block);
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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(const 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_nonanosleep(const clockid_t, int flags, struct timespec *,
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struct timespec __user *);
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int do_posix_clock_nosettime(const 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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int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *ts);
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int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *ts);
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int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *ts);
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int posix_cpu_timer_create(struct k_itimer *timer);
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int posix_cpu_nsleep(const clockid_t which_clock, int flags,
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struct timespec *rqtp, struct timespec __user *rmtp);
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long posix_cpu_nsleep_restart(struct restart_block *restart_block);
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int posix_cpu_timer_set(struct k_itimer *timer, int flags,
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struct itimerspec *new, struct itimerspec *old);
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int posix_cpu_timer_del(struct k_itimer *timer);
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void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp);
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void posix_cpu_timer_schedule(struct k_itimer *timer);
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void run_posix_cpu_timers(struct task_struct *task);
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void posix_cpu_timers_exit(struct task_struct *task);
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void posix_cpu_timers_exit_group(struct task_struct *task);
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void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,
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cputime_t *newval, cputime_t *oldval);
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long clock_nanosleep_restart(struct restart_block *restart_block);
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#endif
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