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143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/*
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* BIRD -- Timers
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*
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* (c) 2013--2017 Ondrej Zajicek <santiago@crfreenet.org>
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* (c) 2013--2017 CZ.NIC z.s.p.o.
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_TIMER_H_
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#define _BIRD_TIMER_H_
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#include "nest/bird.h"
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#include "lib/buffer.h"
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#include "lib/io-loop.h"
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#include "lib/locking.h"
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#include "lib/resource.h"
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#include <stdatomic.h>
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extern _Atomic btime last_time;
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extern _Atomic btime real_time;
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typedef struct timer
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{
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resource r;
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void (*hook)(struct timer *);
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void *data;
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btime expires; /* 0=inactive */
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btime recurrent; /* Timer recurrence */
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uint randomize; /* Amount of randomization */
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struct timeloop *loop; /* Loop where the timer is active */
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int index;
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} timer;
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struct timeloop
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{
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BUFFER_(timer *) timers;
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struct domain_generic *domain;
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struct birdloop *loop;
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};
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#define TLOCK_TIMER_ASSERT(loop) ASSERT_DIE((loop)->domain && DG_IS_LOCKED((loop)->domain))
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#define TLOCK_LOCAL_ASSERT(loop) ASSERT_DIE(!(loop)->domain || DG_IS_LOCKED((loop)->domain))
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static inline uint timers_count(struct timeloop *loop)
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{ TLOCK_TIMER_ASSERT(loop); return loop->timers.used - 1; }
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static inline timer *timers_first(struct timeloop *loop)
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{ TLOCK_TIMER_ASSERT(loop); return (loop->timers.used > 1) ? loop->timers.data[1] : NULL; }
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#define current_time() atomic_load_explicit(&last_time, memory_order_acquire)
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#define current_real_time() atomic_load_explicit(&real_time, memory_order_acquire)
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/* In sysdep code */
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btime current_time_now(void);
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//#define now (current_time() TO_S)
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//#define now_real (current_real_time() TO_S)
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extern btime boot_time;
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timer *tm_new(pool *p);
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#define tm_set(t, when) tm_set_in((t), (when), &main_birdloop)
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#define tm_start(t, after) tm_start_in((t), (after), &main_birdloop)
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void tm_stop(timer *t);
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void tm_set_in(timer *t, btime when, struct birdloop *loop);
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#define tm_start_in(t, after, loop) tm_set_in((t), (current_time() + MAX_((after), 0)), loop)
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static inline int
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tm_active(timer *t)
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{
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return t->expires != 0;
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}
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static inline btime
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tm_remains(timer *t)
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{
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btime now_ = current_time();
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return (t->expires > now_) ? (t->expires - now_) : 0;
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}
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static inline timer *
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tm_new_init(pool *p, void (*hook)(struct timer *), void *data, btime rec, uint rand)
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{
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timer *t = tm_new(p);
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t->hook = hook;
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t->data = data;
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t->recurrent = rec;
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t->randomize = rand;
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return t;
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}
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static inline void
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tm_set_max(timer *t, btime when)
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{
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if (when > t->expires)
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tm_set(t, when);
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}
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static inline void
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tm_start_max_in(timer *t, btime after, struct birdloop *loop)
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{
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btime rem = tm_remains(t);
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tm_start_in(t, MAX_(rem, after), loop);
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}
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#define tm_start_max(t, after) tm_start_max_in(t, after, &main_birdloop)
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/* In sysdep code */
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void times_update(void);
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/* For I/O loop */
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void timers_init(struct timeloop *loop, pool *p);
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void timers_fire(struct timeloop *loop, int io_log);
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/* For extra fine precision */
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u64 ns_now(void);
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struct timeformat {
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const char *fmt1, *fmt2;
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btime limit;
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};
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#define TM_ISO_SHORT_S (struct timeformat){"%T", "%F", (s64) (20*3600) S_}
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#define TM_ISO_SHORT_MS (struct timeformat){"%T.%3f", "%F", (s64) (20*3600) S_}
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#define TM_ISO_SHORT_US (struct timeformat){"%T.%6f", "%F", (s64) (20*3600) S_}
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#define TM_ISO_LONG_S (struct timeformat){"%F %T", NULL, 0}
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#define TM_ISO_LONG_MS (struct timeformat){"%F %T.%3f", NULL, 0}
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#define TM_ISO_LONG_US (struct timeformat){"%F %T.%6f", NULL, 0}
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#define TM_DATETIME_BUFFER_SIZE 32 /* Buffer size required by tm_format_time() */
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btime tm_parse_time(const char *x);
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void tm_format_time(char *x, struct timeformat *fmt, btime t);
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int tm_format_real_time(char *x, size_t max, const char *fmt, btime t);
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#endif
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