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https://gitlab.nic.cz/labs/bird.git
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94eb0858c2
There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
137 lines
3.5 KiB
C
137 lines
3.5 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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uint randomize; /* Amount of randomization */
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uint recurrent; /* Timer recurrence */
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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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struct coroutine *coro;
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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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//#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, 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, int io_log);
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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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