efitime.h File Reference

Detailed Description

By the way, there are 86400000 milliseconds in a day

Date

Apr 14, 2014

Author

Andrey Belomutskiy, (c) 2012-2020

Definition in file efitime.h.

Functions
int	time2print (int64_t time)
constexpr bool	constexpr_isfinite (float f)
constexpr bool	_assertFloatFitsInto32BitsAndCast (float value)
constexpr int32_t	assertFloatFitsInto32BitsAndCast (const char *msg, float value)
efitick_t	sumTickAndFloat (efitick_t ticks, float extra)
uint32_t	getTimeNowLowerNt ()
efitimems_t	getTimeNowMs ()
	Returns the 32 bit number of milliseconds since the board initialization.
efitimesec_t	getTimeNowS ()
	Current system time in seconds (32 bits)
void	setTimeNowUs (int us)
void	advanceTimeUs (int us)

Function Documentation

_assertFloatFitsInto32BitsAndCast()

constexpr bool _assertFloatFitsInto32BitsAndCast ( float  value )

constexpr

Definition at line 40 of file efitime.h.

                                                              {
  constexpr auto FirstUnrepresentableBigFloat = static_cast<float>(INT32_MAX);
  constexpr auto kInt32MinF = static_cast<float>(INT32_MIN);
 
  // 32bit float has 24bit precision that lead to fiasco like:
  // 2147483648.0 > 2147483647 == false
  // Also at 2147483648.0 we need 2^7=128 step to go to next value of 2147483904.0f
  // And 2147483648.0f is already non-representable in 32 bit int
  // So if someone using corner value of max int for smth like invalid float
  // we might accidentally give green light if we are not strictly under 2147483648.0
  // i.e. do not change this check to implicit convertion int->float with non strict condition!
  return constexpr_isfinite(value) && value >= kInt32MinF && value < FirstUnrepresentableBigFloat;
}

Referenced by assertFloatFitsInto32BitsAndCast().

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advanceTimeUs()

void advanceTimeUs

(

int

us

)

Referenced by configureRusefiLuaHooks(), LuaPid::get(), and LuaIndustrialPid::get().

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assertFloatFitsInto32BitsAndCast()

constexpr int32_t assertFloatFitsInto32BitsAndCast ( const char *  msg, float  value  )

constexpr

Definition at line 82 of file efitime.h.

                                                                                 {
  if (!_assertFloatFitsInto32BitsAndCast(value)) {
    criticalError("%s value is not representable in 32bit int: %f", msg, value);
  }
 
  return static_cast<int32_t>(value);
}

Referenced by PrimeController::onIgnitionStateChanged().

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constexpr_isfinite()

constexpr bool constexpr_isfinite ( float  f )

constexpr

Definition at line 27 of file efitime.h.

                                           {
#if __cplusplus >= 202302L
  // In C++23, std::isfinite is officially constexpr
  return std::isfinite(f);
#elif defined(_WIN32) || defined(__APPLE__) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__)
  // On Windows and macOS, std::isfinite might not be constexpr pre-C++23
  return true;
#else
  // This is meant to correspond to normal/target platforms
  return std::isfinite(f);
#endif
}

Referenced by _assertFloatFitsInto32BitsAndCast().

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getTimeNowLowerNt()

uint32_t getTimeNowLowerNt

(

)

Get a monotonically increasing (but wrapping) 32-bit timer value Implemented at port level, based on timer or CPU tick counter Main source of EFI clock, SW-extended to 64bits

2147483648 / ~168MHz = ~12 seconds to overflow

Definition at line 43 of file microsecond_timer_gpt.cpp.

                             {
    return port_rt_get_counter_value();
}

Referenced by getTimeNowNt(), handleShaftSignal(), onLockHook(), onUnlockHook(), and portMicrosecondTimerCallback().

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getTimeNowMs()

efitimems_t getTimeNowMs

(

)

Returns the 32 bit number of milliseconds since the board initialization.

32 bit return type overflows in 23(or46?) days. tag#4554. I think we do not expect rusEFI to run for 23 days straight days any time soon?

Definition at line 34 of file efitime.cpp.

                           {
    return US2MS(getTimeNowUs());
}

Referenced by assertTimeIsLinear(), printGpsInfo(), sayHello(), StepperMotorBase::setInitialPosition(), testMath(), testRusefiMethods(), testSystemCalls(), updateTriggerWaveformIfNeeded(), and MLG::writeSdBlock().

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getTimeNowS()

efitimesec_t getTimeNowS

(

)

Current system time in seconds (32 bits)

32 bit integer number of seconds since ECU boot. 31,710 years - would not overflow during our life span.

Definition at line 42 of file efitime.cpp.

                           {
    return getTimeNowUs() / US_PER_SECOND;
}

Referenced by boardSdCardEnable(), configureRusefiLuaUtilHooks(), AdcDevice::getAvgAdcValue(), handleTestCommand(), TriggerDecoderBase::printGaps(), printVersionForConsole(), sendQcBenchBoardStatus(), timeInfo(), updateDevConsoleState(), and updateTunerStudioState().

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setTimeNowUs()

void setTimeNowUs

(

int

us

)

sumTickAndFloat()

efitick_t sumTickAndFloat ( efitick_t  ticks, float  extra  )

inline

Definition at line 90 of file efitime.h.

                                                                   {
  // we have a peculiar case of type compiler uses to evaluate expression vs precision here
  // we need 64 bit precision not (lower) float precision
  // 32 bits is 11 or 23 seconds if US_TO_NT_MULTIPLIER = 168 like on kinetis/cypress
  // 32 bits is 500 or 1000 seconds if US_TO_NT_MULTIPLIER = 4 like on stm32
  // 'extra' is below 10 seconds here so we use 32 bit type for performance reasons
  return ticks + (int32_t) extra;
}

Referenced by PrimeController::onPrimeStart(), scheduleByAngle(), and scheduleSparkEvent().

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time2print()

int time2print ( int64_t  time )

inline

Definition at line 22 of file efitime.h.

                                    {
  return static_cast<int>(time);
}

Referenced by InjectorOutputPin::close(), priv::efiPrintfInternal(), fireSparkBySettingPinLow(), TriggerCentral::handleShaftSignal(), InjectorOutputPin::open(), TriggerScheduler::scheduleEventsUntilNextTriggerTooth(), scheduleSparkEvent(), and startDwellByTurningSparkPinHigh().

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Go to the source code of this file.