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a4451535c6
In previous versions, every thread used its own time structures, effectively leading to different time in every thread and strange logging messages. The time processing code now uses global atomic variables to keep current time available for fast concurrent reading and safe updates.
129 lines
2.9 KiB
C
129 lines
2.9 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/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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uint randomize; /* Amount of randomization */
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uint recurrent; /* Timer recurrence */
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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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};
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static inline uint timers_count(struct timeloop *loop)
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{ return loop->timers.used - 1; }
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static inline timer *timers_first(struct timeloop *loop)
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{ return (loop->timers.used > 1) ? loop->timers.data[1] : NULL; }
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extern struct timeloop main_timeloop;
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extern _Thread_local struct timeloop *local_timeloop;
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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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//#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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void tm_set(timer *t, btime when);
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void tm_start(timer *t, btime after);
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void tm_stop(timer *t);
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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, uint 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(timer *t, btime after)
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{
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btime rem = tm_remains(t);
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tm_start(t, MAX_(rem, after));
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}
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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);
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void timer_init(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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