AuroraRuntime/Source/Time/Clock.cpp
Reece 7316aa0f8f [-/+] Nuke std::tm dependency from the public api
[*] Major bug in heap allocation, am brain damaged
2022-01-19 15:25:47 +00:00

257 lines
6.9 KiB
C++

/***
Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
File: Clock.cpp
Date: 2021-6-13
Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "Clock.hpp"
using high_res_clock = std::chrono::high_resolution_clock;
using sys_clock = std::chrono::system_clock;
#if defined(AURORA_PLATFORM_WIN32)
#define timegm _mkgmtime
#endif
static sys_clock::duration gEpoch;
static sys_clock::duration gUnixDelta;
static auto InitEpoch()
{
std::tm start{};
start.tm_mday = 29; // day number
start.tm_mon = 7; // month idx, aug
start.tm_year = 101; // 1900 + 101
start.tm_hour = 9; // 11 - index - DST
start.tm_min = 15; // minute offset
auto epoch = sys_clock::from_time_t(timegm(&start)).time_since_epoch();
std::tm unixStart{};
unixStart.tm_mday = 1;
unixStart.tm_year = 70;
auto nixepoch = sys_clock::from_time_t(timegm(&unixStart)).time_since_epoch();
gUnixDelta = epoch - nixepoch;
gEpoch = epoch;
return 0;
}
static auto ___ = InitEpoch();
template<typename T>
static inline T NormalizeEpoch(T sysEpoch)
{
return sysEpoch - gEpoch;
}
template<typename T>
static inline T DecodeEpoch(T auroraEpoch)
{
return auroraEpoch + gEpoch;
}
template<typename Clock_t, typename Duration_t>
static auto TimeFromDurationSinceEpoch(Duration_t in)
{
auto duration = std::chrono::duration_cast<typename Clock_t::duration>(in);
return std::chrono::time_point<Clock_t>(DecodeEpoch(duration));
}
template<typename Duration_t>
static time_t CalculateTimeT(AuUInt64 in)
{
return sys_clock::to_time_t(TimeFromDurationSinceEpoch<sys_clock>(Duration_t(in)));
}
namespace Aurora::Time
{
AUKN_SYM time_t SToCTime(AuInt64 time)
{
return CalculateTimeT<std::chrono::seconds>(time);
}
AUKN_SYM time_t NSToCTime(AuInt64 time)
{
return CalculateTimeT<std::chrono::nanoseconds>(time);
}
AUKN_SYM time_t MSToCTime(AuInt64 time)
{
return CalculateTimeT<std::chrono::milliseconds>(time);
}
AUKN_SYM AuUInt64 CurrentClock()
{
return NormalizeEpoch(sys_clock::now().time_since_epoch()).count();
}
AUKN_SYM AuUInt64 CurrentClockMS()
{
return std::chrono::duration_cast<std::chrono::milliseconds>(NormalizeEpoch(sys_clock::now().time_since_epoch())).count();
}
AUKN_SYM AuUInt64 CurrentClockNS()
{
return std::chrono::duration_cast<std::chrono::nanoseconds>(NormalizeEpoch(sys_clock::now().time_since_epoch())).count();
}
AUKN_SYM AuInt64 CTimeToMS(time_t time)
{
return std::chrono::duration_cast<std::chrono::milliseconds>(NormalizeEpoch(sys_clock::from_time_t(time).time_since_epoch())).count();
}
AUKN_SYM AuUInt64 CurrentInternalClock()
{
return high_res_clock::now().time_since_epoch().count();
}
AUKN_SYM AuUInt64 CurrentInternalClockMS()
{
return std::chrono::duration_cast<std::chrono::milliseconds>(high_res_clock::now().time_since_epoch()).count();
}
AUKN_SYM AuUInt64 CurrentInternalClockNS()
{
return std::chrono::duration_cast<std::chrono::nanoseconds>(high_res_clock::now().time_since_epoch()).count();
}
AUKN_SYM AuInt64 ConvertAuroraToUnixMS(AuInt64 in)
{
return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::milliseconds(in) + gUnixDelta).count();
}
AUKN_SYM AuInt64 ConvertAuroraToUnixNS(AuInt64 in)
{
return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::nanoseconds(in) + gUnixDelta).count();
}
AUKN_SYM AuInt64 ConvertUnixToAuroraMS(AuInt64 in)
{
return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::milliseconds(in) - gUnixDelta).count();
}
AUKN_SYM AuInt64 ConvertUnixToAuroraNS(AuInt64 in)
{
return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::nanoseconds(in) - gUnixDelta).count();
}
AUKN_SYM AuUInt64 ConvertInternalToAuroraEpochMS(AuUInt64 in)
{
static AuInt64 epochDelta = 0;
if (epochDelta == 0)
{
epochDelta = CurrentClockMS() - CurrentInternalClockMS();
}
return epochDelta + in;
}
AUKN_SYM AuUInt64 ConvertInternalToAuroraEpochNS(AuUInt64 in)
{
static AuInt64 epochDelta = 0;
if (epochDelta == 0)
{
epochDelta = CurrentClockNS() - CurrentInternalClockNS();
}
return epochDelta + in;
}
AUKN_SYM double CPUFrequencyDeltaNS()
{
static double frequency = 0;
if (frequency != 0)
{
return frequency;
}
return frequency = (static_cast<double>(high_res_clock::period::num) / static_cast<double>(high_res_clock::period::den) * 1'000'000'000.f);
}
AUKN_SYM double CPUFrequencyDeltaMS()
{
static double frequency = 0;
if (frequency != 0)
{
return frequency;
}
return frequency = (static_cast<double>(high_res_clock::period::num) / static_cast<double>(high_res_clock::period::den) * 1'000.f);
}
AUKN_SYM AuUInt64 ClockJiffies()
{
static AuUInt64 frequency = 0;
if (frequency != 0)
{
return frequency;
}
return frequency = static_cast<double>(high_res_clock::period::den) / static_cast<double>(high_res_clock::period::num);
}
AUKN_SYM tm ToCivilTime(AuInt64 time, bool UTC)
{
std::tm ret{};
auto timet = MSToCTime(time);
if (UTC)
{
#if defined(AURORA_COMPILER_MSVC)
auto tm = gmtime_s(&ret, &timet);
#else
auto tm = gmtime_r(&timet, &ret);
#endif
#if defined(AURORA_COMPILER_MSVC)
SysAssert(!tm, "couldn't convert civil time");
#else
SysAssert(tm, "couldn't convert civil time");
#endif
}
else
{
#if defined(AURORA_COMPILER_MSVC)
if (localtime_s(&ret, &timet))
#else
if (!localtime_r(&timet, &ret))
#endif
{
LogWarn("Couldn't convert local civil time");
return ToCivilTime(time, true);
}
}
tm _;
_.CopyFrom(ret);
return _;
}
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();
}
}