AuroraSupport/AuroraRuntime
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[*] NT/Win32-only: improved AuThreading::SleepNs(qwTimeout)

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This commit is contained in:
Reece Wilson 2024-04-29 17:08:31 +01:00
parent f13c344249
commit 22a4d3383d
1 changed files with 88 additions and 24 deletions
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100
Source/Threading/AuSleep.cpp
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@ -14,25 +14,18 @@
#endif
#if defined(AURORA_IS_MODERNNT_DERIVED)
#include <Time/Time.hpp>
#include <Source/Time/Time.hpp>
#include <Source/Threading/Primitives/SMTYield.hpp>
#endif
namespace Aurora::Threading
{
AUKN_SYM void Sleep(AuUInt64 qwTimeout)
{
#if defined(AURORA_IS_LINUX_DERIVED)
SleepNs(AuMSToNS<AuUInt64>(qwTimeout));
#elif defined(AURORA_IS_MODERNNT_DERIVED)
#if defined(AURORA_IS_MODERNNT_DERIVED)
::Sleep(qwTimeout);
#else
std::atomic<bool> value = false;
BooleanWaitable waitable(value);
WaitFor(&waitable, qwTimeout);
SleepNs(AuMSToNS<AuUInt64>(qwTimeout));
#endif
}
@ -41,15 +34,24 @@ namespace Aurora::Threading
#if defined(AURORA_IS_LINUX_DERIVED) || defined(AURORA_IS_BSD_DERIVED)
auto qwEndTime = AuTime::SteadyClockNS() + qwTimeout;
if ((usleep(qwTimeout / 1000) == -1) &&
if (auto uSleepMnSec = qwTimeout / 1000)
{
if ((usleep(uSleepMnSec) == -1) &&
(errno == EINTR))
{
AuUInt64 qwNow;
while ((qwNow = AuTime::SteadyClockNS()) < qwEndTime)
{
usleep((qwEndTime - qwNow) / 1000);
if (auto uSleepMnSec = (qwEndTime - qwNow) / 1000)
{
usleep(uSleepMnSec);
}
else
{
break;
}
}
}
}
@ -59,26 +61,88 @@ namespace Aurora::Threading
if (pNtDelayExecution)
{
auto uWndTimeSteadyNS = AuTime::SteadyClockNS() + qwTimeout;
auto uEndTimeSteadyNS = AuTime::SteadyClockNS() + qwTimeout;
auto uEndTimeSteadyNS2 = uEndTimeSteadyNS;
#if defined(_AURORA_WANT_STRICT_NT_WAKEUP_TIME_NO_WALL_CLOCK_SHIFT_ALLOWED)
auto uEndTimeWall = AuTime::CurrentClockNS() + qwTimeout;
auto uTargetTimeNt = AuTime::ConvertTimestampNs(uEndTimeWall);
#endif
Win32DropSchedulerResolution();
#else
if (!AuSwInfo::IsWindows8Point1OrGreater())
{
if (qwTimeout < 500000)
{
uEndTimeSteadyNS -= 10'000ull;
(void)YieldPollNs(true, uEndTimeSteadyNS, [=]()
{
return false;
});
return;
}
if (qwTimeout < AuMSToNS<AuUInt64>(1))
{
uEndTimeSteadyNS -= 250'000ull;
}
Win32DropSchedulerResolution();
}
else
{
if (qwTimeout < AuMSToNS<AuUInt64>(1))
{
uEndTimeSteadyNS -= 100'000ull;
}
}
#endif
AuUInt64 uNowNS {};
while ((uNowNS = AuTime::SteadyClockNS()) < uWndTimeSteadyNS)
while ((uNowNS = AuTime::SteadyClockNS()) < uEndTimeSteadyNS2)
{
LARGE_INTEGER word;
#if defined(_AURORA_WANT_STRICT_NT_WAKEUP_TIME_NO_WALL_CLOCK_SHIFT_ALLOWED)
word.QuadPart = uTargetTimeNt;
#else
word.QuadPart = -((uWndTimeSteadyNS - uNowNS) / 100ull);
if (AuThreadPrimitives::ThrdCfg::gPlatformIsSMPProcessorOptimized)
{
if (uEndTimeSteadyNS2 - uNowNS <= 100000ull)
{
for (AU_ITERATE_N(i, 32))
{
AuThreadPrimitives::SMPPause();
}
continue;
}
}
AuSInt sDelta1 = uEndTimeSteadyNS - uNowNS;
word.QuadPart = 0;
if (sDelta1 > 0)
{
word.QuadPart = -(sDelta1 / 100ull);
}
if (!word.QuadPart)
{
if (AuThreadPrimitives::ThrdCfg::gPlatformIsSMPProcessorOptimized)
{
for (AU_ITERATE_N(i, 32))
{
AuThreadPrimitives::SMPPause();
}
continue;
}
else
{
break;
}
}
#endif
pNtDelayExecution(FALSE, &word);
}