/*
 *	BIRD -- Unix Timers
 *
 *	(c) 1998 Martin Mares <mj@ucw.cz>
 *
 *	Can be freely distributed and used under the terms of the GNU GPL.
 */

#ifndef _BIRD_TIMER_H_
#define _BIRD_TIMER_H_

#include <time.h>

#include "lib/resource.h"

typedef time_t bird_clock_t;		/* Use instead of time_t */

typedef struct timer {
  resource r;
  void (*hook)(struct timer *);
  void *data;
  unsigned randomize;			/* Amount of randomization */
  unsigned recurrent;			/* Timer recurrence */
  node n;				/* Internal link */
  bird_clock_t expires;			/* 0=inactive */
} timer;

timer *tm_new(pool *);
void tm_start(timer *, unsigned after);
void tm_stop(timer *);
void tm_dump_all(void);

extern bird_clock_t now; 		/* Relative, monotonic time in seconds */
extern bird_clock_t now_real;		/* Time in seconds since fixed known epoch */

struct timeformat {
  char *fmt1, *fmt2;
  bird_clock_t limit;
};

bird_clock_t tm_parse_date(char *);	/* Convert date to bird_clock_t */
bird_clock_t tm_parse_datetime(char *);	/* Convert date to bird_clock_t */

#define TM_DATETIME_BUFFER_SIZE 32	/* Buffer size required by tm_format_datetime */
void
tm_format_datetime(char *x, struct timeformat *fmt_spec, bird_clock_t t);

#ifdef TIME_T_IS_64BIT
#define TIME_INFINITY 0x7fffffffffffffff
#else
#ifdef TIME_T_IS_SIGNED
#define TIME_INFINITY 0x7fffffff
#else
#define TIME_INFINITY 0xffffffff
#endif
#endif

#endif