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Diffstat (limited to 'libnetdata/clocks/clocks.h')
-rw-r--r-- | libnetdata/clocks/clocks.h | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/libnetdata/clocks/clocks.h b/libnetdata/clocks/clocks.h deleted file mode 100644 index 2beb14ed9..000000000 --- a/libnetdata/clocks/clocks.h +++ /dev/null @@ -1,162 +0,0 @@ -// SPDX-License-Identifier: GPL-3.0-or-later - -#ifndef NETDATA_CLOCKS_H -#define NETDATA_CLOCKS_H 1 - -#include "../libnetdata.h" - -#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 - -typedef uint64_t nsec_t; -typedef uint64_t msec_t; -typedef uint64_t usec_t; -typedef int64_t susec_t; - -typedef struct heartbeat { - usec_t realtime; - usec_t randomness; - size_t statistics_id; -} heartbeat_t; - -/* 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 - -#ifdef CLOCK_UPTIME -/* CLOCK_BOOTTIME falls back to CLOCK_UPTIME on FreeBSD */ -#define CLOCK_BOOTTIME CLOCK_UPTIME -#else // CLOCK_UPTIME -/* CLOCK_BOOTTIME falls back to CLOCK_REALTIME */ -#define CLOCK_BOOTTIME CLOCK_REALTIME -#endif // CLOCK_UPTIME - -#else // CLOCK_BOOTTIME - -#ifdef HAVE_CLOCK_GETTIME -#define CLOCK_BOOTTIME_IS_AVAILABLE 1 // required for /proc/uptime -#endif // HAVE_CLOCK_GETTIME - -#endif // CLOCK_BOOTTIME - -#ifndef NSEC_PER_MSEC -#define NSEC_PER_MSEC 1000000ULL -#endif - -#ifndef NSEC_PER_SEC -#define NSEC_PER_SEC 1000000000ULL -#endif -#ifndef NSEC_PER_USEC -#define NSEC_PER_USEC 1000ULL -#endif - -#ifndef USEC_PER_SEC -#define USEC_PER_SEC 1000000ULL -#endif -#ifndef MSEC_PER_SEC -#define MSEC_PER_SEC 1000ULL -#endif - -#define USEC_PER_MS 1000ULL - -#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. - */ -int clock_gettime(clockid_t clk_id, struct timespec *ts); -#endif - -/* - * Three clocks are available (cf. man 3 clock_gettime): - * - * REALTIME clock (i.e. wall-clock): - * This clock is affected by discontinuous jumps in the system time - * (e.g., if the system administrator manually changes the clock), and by the incremental adjustments performed by adjtime(3) and NTP. - * - * MONOTONIC clock - * Clock that cannot be set and represents monotonic time since some unspecified starting point. - * This clock is not affected by discontinuous jumps in the system time - * (e.g., if the system administrator manually changes the clock), but is affected by the incremental adjustments performed by adjtime(3) and NTP. - * If not available on the system, this clock falls back to REALTIME clock. - * - * BOOTTIME clock - * Identical to CLOCK_MONOTONIC, except it also includes any time that the system is suspended. - * This allows applications to get a suspend-aware monotonic clock without having to deal with the complications of CLOCK_REALTIME, - * which may have discontinuities if the time is changed using settimeofday(2). - * If not available on the system, this clock falls back to MONOTONIC clock. - * - * All now_*_timeval() functions fill the `struct timeval` with the time from the appropriate clock. - * Those functions return 0 on success, -1 else with errno set appropriately. - * - * All now_*_sec() functions return the time in seconds from the appropriate clock, or 0 on error. - * All now_*_usec() functions return the time in microseconds from the appropriate clock, or 0 on error. - * - */ -int now_realtime_timeval(struct timeval *tv); -time_t now_realtime_sec(void); -usec_t now_realtime_usec(void); - -int now_monotonic_timeval(struct timeval *tv); -time_t now_monotonic_sec(void); -msec_t now_realtime_msec(void); -usec_t now_monotonic_usec(void); -int now_monotonic_high_precision_timeval(struct timeval *tv); -time_t now_monotonic_high_precision_sec(void); -usec_t now_monotonic_high_precision_usec(void); - -int now_boottime_timeval(struct timeval *tv); -time_t now_boottime_sec(void); -usec_t now_boottime_usec(void); - -usec_t timeval_usec(struct timeval *tv); -msec_t timeval_msec(struct timeval *tv); - -usec_t dt_usec(struct timeval *now, struct timeval *old); -susec_t dt_usec_signed(struct timeval *now, struct timeval *old); - -void heartbeat_init(heartbeat_t *hb); - -/* Sleeps until next multiple of tick using monotonic clock. - * Returns elapsed time in microseconds since previous heartbeat - */ -usec_t heartbeat_next(heartbeat_t *hb, usec_t tick); - -void heartbeat_statistics(usec_t *min_ptr, usec_t *max_ptr, usec_t *average_ptr, size_t *count_ptr); - -void sleep_usec_with_now(usec_t usec, usec_t started_ut); -#define sleep_usec(usec) sleep_usec_with_now(usec, 0); - -void clocks_init(void); - -// lower level functions - avoid using directly -time_t now_sec(clockid_t clk_id); -usec_t now_usec(clockid_t clk_id); -int now_timeval(clockid_t clk_id, struct timeval *tv); - -collected_number uptime_msec(char *filename); - -extern usec_t clock_monotonic_resolution; -extern usec_t clock_realtime_resolution; - -void sleep_to_absolute_time(usec_t usec); - -#endif /* NETDATA_CLOCKS_H */ |