MonotonicClock Namespace Reference

Functions
uint64_t	nowUs ()
template<typename Rep , typename Period >
constexpr std::optional< std::chrono::duration< Rep, Period > >	age (std::chrono::duration< Rep, Period > timestamp, std::chrono::duration< Rep, Period > now)
	Age of timestamp at now, both in the same unit; empty for a missing or future timestamp.
constexpr std::optional< std::chrono::microseconds >	age (uint64_t timestampUs, uint64_t nowUs)
constexpr std::chrono::microseconds	remaining (uint64_t timestampUs, uint64_t nowUs, std::chrono::microseconds lifetime)
	Time left before a receipt reaches lifetime; zero for a missing, future or expired one.
constexpr bool	fresh (uint64_t timestampUs, uint64_t nowUs, std::chrono::microseconds lifetime)
	Whether a receipt is younger than lifetime.
constexpr bool	withinAge (uint64_t timestampUs, uint64_t nowUs, std::chrono::microseconds maximumAge)
	Whether a receipt is at most maximumAge old, its limit included.

Detailed Description

Timestamps from one monotonic clock domain. A zero (or negative) timestamp means "never", and a timestamp later than now has no age.

Function Documentation

age() [1/2]

template<typename Rep , typename Period >

constexpr std::optional< std::chrono::duration< Rep, Period > > MonotonicClock::age ( std::chrono::duration< Rep, Period >  timestamp, std::chrono::duration< Rep, Period >  now  )

constexpr

Age of timestamp at now, both in the same unit; empty for a missing or future timestamp.

Definition at line 19 of file MonotonicClock.h.

Referenced by age(), NTRIPConnectionStats::correctionAgeSec(), NTRIPSourceTableController::fetch(), remaining(), GPSCorrectionSelector::submit(), and withinAge().

age() [2/2]

constexpr std::optional< std::chrono::microseconds > MonotonicClock::age ( uint64_t  timestampUs, uint64_t  nowUs  )

constexpr

Definition at line 28 of file MonotonicClock.h.

References age(), and nowUs().

fresh()

constexpr bool MonotonicClock::fresh ( uint64_t  timestampUs, uint64_t  nowUs, std::chrono::microseconds  lifetime  )

constexpr

Whether a receipt is younger than lifetime.

Definition at line 44 of file MonotonicClock.h.

References nowUs(), and remaining().

Referenced by NTRIPSourceTableController::fetch(), GPSIntegrityReport::freshAt(), and GPSInputMonitor::update().

nowUs()

uint64_t MonotonicClock::nowUs ( )

inline

Definition at line 10 of file MonotonicClock.h.

Referenced by age(), fresh(), ReadTimestamp::nowUs(), QtRuntimeScheduler::nowUs(), remaining(), SerialAutoConnect::update(), and withinAge().

remaining()

constexpr std::chrono::microseconds MonotonicClock::remaining ( uint64_t  timestampUs, uint64_t  nowUs, std::chrono::microseconds  lifetime  )

constexpr

Time left before a receipt reaches lifetime; zero for a missing, future or expired one.

Definition at line 34 of file MonotonicClock.h.

References age(), and nowUs().

Referenced by fresh().

withinAge()

constexpr bool MonotonicClock::withinAge ( uint64_t  timestampUs, uint64_t  nowUs, std::chrono::microseconds  maximumAge  )

constexpr

Whether a receipt is at most maximumAge old, its limit included.

Definition at line 50 of file MonotonicClock.h.

References age(), and nowUs().

Referenced by NMEA::NavigationEpochAssembler::expireUntimedMetadata().