Jamie Reece Wilson
44c7898c29
Absolute expiration times track any changes in the system time; relative expiration times are not affected by system time changes.
102 lines
2.5 KiB
C++
102 lines
2.5 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: AuSleep.cpp
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Date: 2021-6-12
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "AuSleep.hpp"
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#include "AuWaitFor.hpp"
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#if defined(AURORA_IS_POSIX_DERIVED)
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#include <unistd.h>
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#endif
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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#include <Time/Time.hpp>
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#endif
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namespace Aurora::Threading
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{
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AUKN_SYM void Sleep(AuUInt64 qwTimeout)
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{
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#if defined(AURORA_IS_LINUX_DERIVED)
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SleepNs(AuMSToNS<AuUInt64>(qwTimeout));
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#elif defined(AURORA_IS_MODERNNT_DERIVED)
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::Sleep(qwTimeout);
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#else
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std::atomic<bool> value = false;
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BooleanWaitable waitable(value);
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WaitFor(&waitable, qwTimeout);
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#endif
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}
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AUKN_SYM void SleepNs(AuUInt64 qwTimeout)
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{
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#if defined(AURORA_IS_LINUX_DERIVED) || defined(AURORA_IS_BSD_DERIVED)
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auto qwEndTime = AuTime::SteadyClockNS() + qwTimeout;
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if ((usleep(qwTimeout / 1000) == -1) &&
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(errno == EINTR))
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{
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AuUInt64 qwNow;
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while ((qwNow = AuTime::SteadyClockNS()) < qwEndTime)
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{
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usleep((qwEndTime - qwNow) / 1000);
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}
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}
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#else
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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if (pNtDelayExecution)
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{
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auto uWndTimeSteadyNS = AuTime::SteadyClockNS() + qwTimeout;
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#if defined(_AURORA_WANT_STRICT_NT_WAKEUP_TIME_NO_WALL_CLOCK_SHIFT_ALLOWED)
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auto uEndTimeWall = AuTime::CurrentClockNS() + qwTimeout;
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auto uTargetTimeNt = AuTime::ConvertTimestampNs(uEndTimeWall);
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#endif
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Win32DropSchedulerResolution();
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AuUInt64 uNowNS {};
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while ((uNowNS = AuTime::SteadyClockNS()) < uWndTimeSteadyNS)
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{
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LARGE_INTEGER word;
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#if defined(_AURORA_WANT_STRICT_NT_WAKEUP_TIME_NO_WALL_CLOCK_SHIFT_ALLOWED)
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word.QuadPart = uTargetTimeNt;
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#else
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word.QuadPart = -((uWndTimeSteadyNS - uNowNS) / 100ull);
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if (!word.QuadPart)
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{
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break;
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}
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#endif
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pNtDelayExecution(FALSE, &word);
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}
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return;
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}
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#endif
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auto status = YieldPollNs(true, qwTimeout + Time::SteadyClockNS(), [=]()
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{
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return false;
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});
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#endif
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}
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void InitSleep()
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{
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// ...
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}
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} |