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#ifndef NETDATA_CLOCKS_H
#define NETDATA_CLOCKS_H 1
#ifndef HAVE_STRUCT_TIMESPEC
struct timespec {
time_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
};
#endif
#ifndef HAVE_CLOCKID_T
typedef int clockid_t;
#endif
#ifndef HAVE_CLOCK_GETTIME
int clock_gettime(clockid_t clk_id, struct timespec *ts);
#endif
/* Linux value is as good as any other */
#ifndef CLOCK_REALTIME
#define CLOCK_REALTIME 0
#endif
#ifndef CLOCK_MONOTONIC
/* fallback to CLOCK_REALTIME if not available */
#define CLOCK_MONOTONIC CLOCK_REALTIME
#endif
#ifndef CLOCK_BOOTTIME
/* fallback to CLOCK_MONOTONIC if not available */
#define CLOCK_BOOTTIME CLOCK_MONOTONIC
#else
#ifdef HAVE_CLOCK_GETTIME
#define CLOCK_BOOTTIME_IS_AVAILABLE 1 // required for /proc/uptime
#endif
#endif
typedef unsigned long long usec_t;
#define NSEC_PER_SEC 1000000000ULL
#define NSEC_PER_MSEC 1000000ULL
#define NSEC_PER_USEC 1000ULL
#define USEC_PER_SEC 1000000ULL
#ifndef HAVE_CLOCK_GETTIME
/* Fallback function for POSIX.1-2001 clock_gettime() function.
*
* We use a realtime clock from gettimeofday(), this will
* make systems without clock_gettime() support sensitive
* to time jumps or hibernation/suspend side effects.
*/
extern int clock_gettime(clockid_t clk_id, struct timespec *ts);
#endif
/* Fills struct timeval with time since EPOCH from real-time clock (i.e. wall-clock).
* - Hibernation/suspend time is included
* - adjtime()/NTP adjustments affect this clock
* Return 0 on succes, -1 else with errno set appropriately.
*/
extern int now_realtime_timeval(struct timeval *tv);
/* Returns time since EPOCH from real-time clock (i.e. wall-clock).
* - Hibernation/suspend time is included
* - adjtime()/NTP adjustments affect this clock
*/
extern time_t now_realtime_sec(void);
extern usec_t now_realtime_usec(void);
/* Returns time from monotonic clock if available, real-time clock else.
* If monotonic clock is available:
* - hibernation/suspend time is not included
* - adjtime()/NTP adjusments affect this clock
* If monotonic clock is not available, this fallbacks to now_realtime().
*/
extern time_t now_monotonic_sec(void);
extern usec_t now_monotonic_usec(void);
/* Returns time from boottime clock if available,
* monotonic clock else if available, real-time clock else.
* If boottime clock is available:
* - hibernation/suspend time is included
* - adjtime()/NTP adjusments affect this clock
* If boottime clock is not available, this fallbacks to now_monotonic().
* If monotonic clock is not available, this fallbacks to now_realtime().
*/
extern time_t now_boottime_sec(void);
extern usec_t now_boottime_usec(void);
extern usec_t timeval_usec(struct timeval *ts);
extern usec_t dt_usec(struct timeval *now, struct timeval *old);
#endif /* NETDATA_CLOCKS_H */
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