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