583 lines
24 KiB
C++
583 lines
24 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: AuClock.cpp
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Date: 2021-6-13
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "AuClock.hpp"
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#include "Time.hpp"
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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// TODO (Reece): ....
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// benchmarking:
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// https://github.com/microsoft/STL/issues/2085
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struct steady_clock_fast
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{ // wraps QueryPerformanceCounter
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using rep = long long;
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using period = std::nano;
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using duration = std::chrono::nanoseconds;
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using time_point = _CHRONO time_point<steady_clock_fast>;
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static constexpr bool is_steady = true;
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static_assert(period::num == 1, "This assumes period::num == 1.");
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_NODISCARD static time_point now() noexcept
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{
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static const long long _Freq = _Query_perf_frequency();
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const long long _Ctr = _Query_perf_counter();
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if (_Freq == 10000000)
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{
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return time_point(duration(_Ctr * 100));
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}
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else if (_Freq == 1000000)
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{
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return time_point(duration(_Ctr * 1000));
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}
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else if (_Freq == 100000)
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{
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return time_point(duration(_Ctr * 10000));
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}
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else if (_Freq == 100000000)
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{
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return time_point(duration(_Ctr * 10));
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}
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else if (_Freq == 1000000000)
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{
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return time_point(duration(_Ctr));
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}
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else
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{
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// 6 branches: the default threshold for most jit and language compiler backends to decide to pick a jump table, if the values were in a close range
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// otherwise, back to a tree of paths. either way, im sure 6 if elses are faster than grug math with large numbers, modulus, division, and multiplication
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const long long _Whole = (_Ctr / _Freq) * period::den;
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const long long _Part = (_Ctr % _Freq) * period::den / _Freq;
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return time_point(duration(_Whole + _Part));
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}
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}
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};
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// ~3.0741 seconds
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using high_res_clock = steady_clock_fast;
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// holy fuck, we're keeping this
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// ~2x improvement
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#else
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// ~6.07 seconds
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using high_res_clock = std::chrono::high_resolution_clock;
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#endif
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#if defined(AURORA_IS_POSIX_DERIVED)
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#include <sys/resource.h>
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#endif
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using sys_clock = std::chrono::system_clock;
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using steady_clock = std::chrono::steady_clock;
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#if defined(AURORA_PLATFORM_WIN32)
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#define timegm _mkgmtime
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#endif
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static sys_clock::duration gEpoch;
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static sys_clock::duration gUnixDelta;
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static auto InitEpoch()
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{
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std::tm start{0, 15, 10, 29, 7, 101, 0, 0, 0};
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auto epoch = sys_clock::from_time_t(timegm(&start)).time_since_epoch();
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std::tm unixStart{};
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unixStart.tm_mday = 1;
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unixStart.tm_year = 70;
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// dont care what the spec says, you can't trust some ms stls
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// sys_clock can have its own epoch for all we care
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auto nixEpoch = sys_clock::from_time_t(timegm(&unixStart)).time_since_epoch();
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gUnixDelta = epoch - nixEpoch;
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gEpoch = epoch;
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return 0;
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}
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static auto ___ = InitEpoch();
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template<typename T>
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static inline T NormalizeEpoch(T sysEpoch)
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{
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return sysEpoch - gEpoch;
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}
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template<typename T>
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static inline T DecodeEpoch(T auroraEpoch)
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{
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return auroraEpoch + gEpoch;
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}
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template<typename Clock_t, typename Duration_t>
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static auto TimeFromDurationSinceEpoch(Duration_t in)
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{
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auto duration = std::chrono::duration_cast<typename Clock_t::duration>(in);
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return std::chrono::time_point<Clock_t>(DecodeEpoch(duration));
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}
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template<typename Duration_t>
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static time_t CalculateTimeT(AuUInt64 in)
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{
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return sys_clock::to_time_t(TimeFromDurationSinceEpoch<sys_clock>(Duration_t(in)));
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}
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namespace Aurora::Time
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{
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// removed from public header / deprecating
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AUKN_SYM AuUInt64 HighResClock();
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AUKN_SYM AuUInt64 HighResClockNS();
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AUKN_SYM AuUInt64 HighResClockMS();
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AUKN_SYM AuUInt64 HighResClockJiffies();
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AUKN_SYM time_t SToCTime(AuInt64 time)
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{
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return CalculateTimeT<std::chrono::seconds>(time);
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}
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AUKN_SYM time_t NSToCTime(AuInt64 time)
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{
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return CalculateTimeT<std::chrono::nanoseconds>(time);
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}
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AUKN_SYM time_t MSToCTime(AuInt64 time)
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{
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return CalculateTimeT<std::chrono::milliseconds>(time);
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}
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AUKN_SYM AuInt64 CurrentClock()
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{
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return NormalizeEpoch(sys_clock::now().time_since_epoch()).count();
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}
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AUKN_SYM AuInt64 CurrentClockMS()
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{
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return std::chrono::duration_cast<std::chrono::milliseconds>(NormalizeEpoch(sys_clock::now().time_since_epoch())).count();
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}
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AUKN_SYM AuInt64 CurrentClockNS()
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{
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return std::chrono::duration_cast<std::chrono::nanoseconds>(NormalizeEpoch(sys_clock::now().time_since_epoch())).count();
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}
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AUKN_SYM AuUInt64 SteadyClock()
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{
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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return _Query_perf_counter();
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#endif
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return SteadyClockNS() / (1000000000ull / SteadyClockJiffies());
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}
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AUKN_SYM AuUInt64 SteadyClockMS()
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{
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#if defined(AURORA_IS_POSIX_DERIVED)
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::timespec spec {};
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if (::clock_gettime(CLOCK_MONOTONIC, &spec) == 0)
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{
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return AuSToMS<AuUInt64>(spec.tv_sec) + AuNSToMS<AuUInt64>(spec.tv_nsec);
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}
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#endif
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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return std::chrono::duration_cast<std::chrono::milliseconds>(high_res_clock::now().time_since_epoch()).count();
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#endif
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return std::chrono::duration_cast<std::chrono::milliseconds>(steady_clock::now().time_since_epoch()).count();
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}
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AUKN_SYM AuUInt64 SteadyClockNS()
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{
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#if defined(AURORA_IS_POSIX_DERIVED)
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::timespec spec {};
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if (::clock_gettime(CLOCK_MONOTONIC, &spec) == 0)
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{
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return AuMSToNS<AuUInt64>(AuSToMS<AuUInt64>(spec.tv_sec)) + (AuUInt64)spec.tv_nsec;
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}
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#endif
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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return std::chrono::duration_cast<std::chrono::nanoseconds>(high_res_clock::now().time_since_epoch()).count();
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#endif
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return std::chrono::duration_cast<std::chrono::nanoseconds>(steady_clock::now().time_since_epoch()).count();
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}
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AUKN_SYM AuInt64 CTimeToMS(time_t time)
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{
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return std::chrono::duration_cast<std::chrono::milliseconds>(NormalizeEpoch(sys_clock::from_time_t(time).time_since_epoch())).count();
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}
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AuInt64 CTimeNSNormalize(AuUInt64 time)
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{
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return std::chrono::duration_cast<std::chrono::nanoseconds>(NormalizeEpoch(std::chrono::nanoseconds(time))).count();
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}
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#if defined(AURORA_IS_POSIX_DERIVED)
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enum class EPseudoPosixClock
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{
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eUser,
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eKernel,
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eAll
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};
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static AuUInt64 GetPOSIXTimeEx(struct rusage *usage, EPseudoPosixClock e)
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{
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struct timeval *tv {};
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switch (e)
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{
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case EPseudoPosixClock::eAll:
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{
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return GetPOSIXTimeEx(usage, EPseudoPosixClock::eKernel) +
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GetPOSIXTimeEx(usage, EPseudoPosixClock::eUser);
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}
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case EPseudoPosixClock::eUser:
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{
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tv = &usage->ru_utime;
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break;
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}
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case EPseudoPosixClock::eKernel:
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{
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tv = &usage->ru_stime;
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break;
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}
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};
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auto uMS = AuSToMS<AuUInt64>(tv->tv_sec);
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auto uNS = AuMSToNS<AuUInt64>(uMS) +
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tv->tv_usec * 1'000ull;
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return uNS;
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}
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static AuUInt64 GetPOSIXTime(bool bThread, EPseudoPosixClock e)
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{
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struct rusage usage;
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getrusage(bThread ? RUSAGE_THREAD : RUSAGE_SELF,
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&usage);
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return GetPOSIXTimeEx(&usage, e);
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}
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#if !defined(CLOCK_THREAD_CPUTIME_ID)
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#define CLOCK_THREAD_CPUTIME_ID 0
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#endif
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#if !defined(CLOCK_PROCESS_CPUTIME_ID)
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#define CLOCK_PROCESS_CPUTIME_ID 0
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#endif
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#endif
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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#define ADD_CLOCK_FAMILY(fn, type, expr, posixId, posixCall) \
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AUKN_SYM AuUInt64 fn ## ClockJiffies(); \
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\
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AUKN_SYM AuUInt64 fn ## ClockMS() \
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{ \
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return AuNSToMS<AuUInt64>(fn ## ClockNS()); \
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} \
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\
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AUKN_SYM AuUInt64 fn ## ClockNS() \
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{ \
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FILETIME creation, exit, kernel, user; \
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if (::Get ## type ## Times(GetCurrent ## type(), &creation, &exit, &kernel, &user)) \
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{ \
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ULARGE_INTEGER ullUser; \
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{ \
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ullUser.LowPart = user.dwLowDateTime; \
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ullUser.HighPart = user.dwHighDateTime; \
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} \
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\
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ULARGE_INTEGER ullKernel; \
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{ \
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ullKernel.LowPart = kernel.dwLowDateTime; \
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ullKernel.HighPart = kernel.dwHighDateTime; \
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} \
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return (expr) * 100ull; \
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} \
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return HighResClockNS(); \
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} \
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\
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AUKN_SYM AuUInt64 fn ## Clock() \
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{ \
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FILETIME creation, exit, kernel, user; \
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\
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if (::Get ## type ## Times(GetCurrent ## type(), &creation, &exit, &kernel, &user)) \
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{ \
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ULARGE_INTEGER ullUser; \
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{ \
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ullUser.LowPart = user.dwLowDateTime; \
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ullUser.HighPart = user.dwHighDateTime; \
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} \
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\
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ULARGE_INTEGER ullKernel; \
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{ \
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ullKernel.LowPart = kernel.dwLowDateTime; \
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ullKernel.HighPart = kernel.dwHighDateTime; \
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} \
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return expr; \
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} \
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\
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return fn ##ClockNS() / (1000000000ull / fn ## ClockJiffies()); \
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} \
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\
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AUKN_SYM AuUInt64 fn ## ClockJiffies() \
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{ \
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return 1000000000ull / 100u; \
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}
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#elif defined(AURORA_IS_POSIX_DERIVED)
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#define ADD_CLOCK_FAMILY(fn, type, expr, posixId, posixCall) \
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AUKN_SYM AuUInt64 fn ## ClockJiffies(); \
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\
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AUKN_SYM AuUInt64 fn ## ClockMS() \
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{ \
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if (!posixId) \
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{ \
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return AuNSToMS<AuUInt64>(GetPOSIXTime AU_WHAT(posixCall)); \
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} \
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return AuNSToMS<AuUInt64>(fn ## ClockNS()); \
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} \
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\
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AUKN_SYM AuUInt64 fn ## ClockNS() \
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{ \
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if (!posixId) \
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{ \
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return GetPOSIXTime AU_WHAT(posixCall); \
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} \
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::timespec spec {}; \
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if (::clock_gettime(posixId, &spec) == 0) \
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{ \
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return AuMSToNS<AuUInt64>(AuSToMS<AuUInt64>(spec.tv_sec)) + (AuUInt64)spec.tv_nsec; \
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} \
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return HighResClockNS(); \
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} \
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\
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AUKN_SYM AuUInt64 fn ## Clock() \
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{ \
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if (!posixId) \
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{ \
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return fn ##ClockNS() / 1000ull; \
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} \
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return fn ##ClockNS() / (1000000000ull / fn ## ClockJiffies()); \
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} \
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\
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AUKN_SYM AuUInt64 fn ## ClockJiffies() \
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{ \
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if (!posixId) \
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{ \
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return 1'000'000ull; \
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} \
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static AuUInt64 frequency = 0; \
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if (frequency != 0) \
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{ \
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return frequency; \
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} \
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\
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::timespec spec {}; \
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if (::clock_getres(posixId, &spec) == 0) \
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{ \
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if (spec.tv_nsec && !spec.tv_sec) \
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{ \
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return frequency = 1000000000ull / spec.tv_nsec; \
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} \
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else \
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{ \
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SysUnreachable(); \
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return 0; \
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} \
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} \
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\
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return HighResClockJiffies(); \
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}
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#else
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AUKN_SYM AuUInt64 fn ## ClockMS()
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{
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return 0;
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}
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AUKN_SYM AuUInt64 fn ## ClockNS()
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{
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return 0;
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}
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AUKN_SYM AuUInt64 fn ## Clock()
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{
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return 0;
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}
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AUKN_SYM AuUInt64 fn ## ClockJiffies()
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{
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return 0;
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}
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#endif
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ADD_CLOCK_FAMILY(Process, Process, (ullUser.QuadPart + ullKernel.QuadPart), /*CLOCK_PROCESS_CPUTIME_ID*/ 0, (false, EPseudoPosixClock::eAll));
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ADD_CLOCK_FAMILY(ProcessKernel, Process, (ullKernel.QuadPart), 0, (false, EPseudoPosixClock::eKernel));
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ADD_CLOCK_FAMILY(ProcessUser, Process, (ullUser.QuadPart), /*CLOCK_PROCESS_CPUTIME_ID*/0, (false, EPseudoPosixClock::eUser));
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ADD_CLOCK_FAMILY(Thread, Thread, (ullUser.QuadPart + ullKernel.QuadPart), /*CLOCK_THREAD_CPUTIME_ID*/0, (true, EPseudoPosixClock::eAll));
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ADD_CLOCK_FAMILY(ThreadKernel, Thread, (ullKernel.QuadPart), 0, (true, EPseudoPosixClock::eKernel));
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ADD_CLOCK_FAMILY(ThreadUser, Thread, (ullUser.QuadPart), /*CLOCK_THREAD_CPUTIME_ID*/0, (true, EPseudoPosixClock::eUser));
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AUKN_SYM AuInt64 ConvertAuroraToUnixMS(AuInt64 in)
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{
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return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::milliseconds(in) + gUnixDelta).count();
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}
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AUKN_SYM AuInt64 ConvertAuroraToUnixNS(AuInt64 in)
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{
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return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::nanoseconds(in) + gUnixDelta).count();
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}
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AUKN_SYM AuInt64 ConvertUnixToAuroraMS(AuInt64 in)
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{
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return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::milliseconds(in) - gUnixDelta).count();
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}
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AUKN_SYM AuInt64 ConvertUnixToAuroraNS(AuInt64 in)
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{
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return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::nanoseconds(in) - gUnixDelta).count();
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}
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AUKN_SYM AuUInt64 SteadyClockJiffies()
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{
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static AuUInt64 frequency = 0;
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if (frequency != 0)
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{
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return frequency;
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}
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#if defined(AURORA_COMPILER_MSVC)
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return frequency = _Query_perf_frequency();
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#endif
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#if defined(AURORA_IS_POSIX_DERIVED)
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::timespec spec {};
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if (::clock_getres(CLOCK_MONOTONIC, &spec) == 0)
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{
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if (spec.tv_nsec && !spec.tv_sec)
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{
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return frequency = 1000000000ull / spec.tv_nsec;
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}
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}
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#endif
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return frequency = static_cast<double>(steady_clock::period::den) / static_cast<double>(steady_clock::period::num);
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}
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AUKN_SYM tm ToCivilTime(AuInt64 time, bool UTC)
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{
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std::tm ret {};
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auto timet = MSToCTime(time);
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if (UTC)
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{
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#if defined(AURORA_COMPILER_MSVC)
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auto tm = gmtime_s(&ret, &timet);
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#else
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auto tm = gmtime_r(&timet, &ret);
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#endif
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#if defined(AURORA_COMPILER_MSVC)
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SysAssert(!tm, "couldn't convert civil time");
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#else
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SysAssert(tm, "couldn't convert civil time");
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#endif
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}
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else
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{
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#if defined(AURORA_COMPILER_MSVC)
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if (localtime_s(&ret, &timet))
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#else
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if (!localtime_r(&timet, &ret))
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#endif
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{
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SysPushErrorGeneric("Couldn't convert local civil time");
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return ToCivilTime(time, true);
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}
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}
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tm _;
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_.CopyFrom(ret);
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return _;
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|
}
|
|
|
|
AUKN_SYM AuInt64 FromCivilTime(const tm &time, bool UTC)
|
|
{
|
|
::tm tm;
|
|
time_t timet;
|
|
|
|
time.CopyTo(tm);
|
|
|
|
if (UTC)
|
|
{
|
|
tm.tm_isdst = 0;
|
|
timet = timegm(&tm);
|
|
}
|
|
else
|
|
{
|
|
tm.tm_isdst = -1; // out of the 2 crts i've bothered to check, out of 3, this is legal
|
|
timet = mktime(&tm);
|
|
}
|
|
|
|
if ((timet == 0) || (timet == -1))
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
return std::chrono::duration_cast<std::chrono::milliseconds>(NormalizeEpoch(std::chrono::system_clock::from_time_t(timet).time_since_epoch())).count();
|
|
}
|
|
|
|
AUKN_SYM tm NormalizeCivilTimezone(const Time::tm &time, ETimezoneShift shift)
|
|
{
|
|
if ((time.tm_isdst == 0) && (shift == ETimezoneShift::eUTC))
|
|
{
|
|
return time;
|
|
}
|
|
|
|
return ToCivilTime(FromCivilTime(time, shift == ETimezoneShift::eUTC));
|
|
}
|
|
|
|
#pragma region TO_DEPRECATE
|
|
// [soon to be] @deprecated / was used by benchmarks to measure thread time
|
|
|
|
AUKN_SYM AuUInt64 HighResClock()
|
|
{
|
|
return SteadyClock();
|
|
}
|
|
|
|
AUKN_SYM AuUInt64 HighResClockMS()
|
|
{
|
|
return SteadyClockMS();
|
|
}
|
|
|
|
AUKN_SYM AuUInt64 HighResClockNS()
|
|
{
|
|
return SteadyClockNS();
|
|
}
|
|
|
|
AUKN_SYM AuUInt64 HighResClockJiffies()
|
|
{
|
|
return SteadyClockJiffies();
|
|
}
|
|
|
|
#pragma endregion TO_DEPRECATE
|
|
} |