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/*! \file timer.h
* Osmocom timer handling routines. */
/*
* (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
/*! \defgroup timer Osmocom timers
* Timer management:
* - Create a struct osmo_timer_list
* - Fill out timeout and use osmo_timer_add(), or
* use osmo_timer_schedule() to schedule a timer in
* x seconds and microseconds from now...
* - Use osmo_timer_del() to remove the timer
*
* Internally:
* - We hook into select.c to give a timeval of the
* nearest timer. On already passed timers we give
* it a 0 to immediately fire after the select
* - osmo_timers_update() will call the callbacks and
* remove the timers.
* @{
* \file timer.h */
#pragma once
#include <sys/time.h>
#include <stdbool.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/linuxrbtree.h>
/* convert absolute time (in seconds) to elapsed days/hours/minutes */
#define OSMO_SEC2MIN(sec) ((sec % (60 * 60)) / 60)
#define OSMO_SEC2HRS(sec) ((sec % (60 * 60 * 24)) / (60 * 60))
#define OSMO_SEC2DAY(sec) ((sec % (60 * 60 * 24 * 365)) / (60 * 60 * 24)) /* we ignore leap year for simplicity */
/*! A structure representing a single instance of a timer */
struct osmo_timer_list {
struct rb_node node; /*!< rb-tree node header */
struct llist_head list; /*!< internal list header */
struct timeval timeout; /*!< expiration time */
unsigned int active : 1; /*!< is it active? */
void (*cb)(void*); /*!< call-back called at timeout */
void *data; /*!< user data for callback */
};
/*
* timer management
*/
void osmo_timer_setup(struct osmo_timer_list *timer, void (*cb)(void *data), void *data);
void osmo_timer_add(struct osmo_timer_list *timer);
void osmo_timer_schedule(struct osmo_timer_list *timer, int seconds, int microseconds);
void osmo_timer_del(struct osmo_timer_list *timer);
int osmo_timer_pending(struct osmo_timer_list *timer);
int osmo_timer_remaining(const struct osmo_timer_list *timer,
const struct timeval *now,
struct timeval *remaining);
/*
* internal timer list management
*/
struct timeval *osmo_timers_nearest(void);
void osmo_timers_prepare(void);
int osmo_timers_update(void);
int osmo_timers_check(void);
int osmo_gettimeofday(struct timeval *tv, struct timezone *tz);
/*
* timer override
*/
extern bool osmo_gettimeofday_override;
extern struct timeval osmo_gettimeofday_override_time;
void osmo_gettimeofday_override_add(time_t secs, suseconds_t usecs);
/*! @} */
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