AuroraRuntime/Source/Threading/AuSleep.cpp

91 lines
2.0 KiB
C++

/***
Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
File: AuSleep.cpp
Date: 2021-6-12
Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "AuSleep.hpp"
#include "AuWaitFor.hpp"
#if defined(AURORA_IS_POSIX_DERIVED)
#include <unistd.h>
#endif
#if defined(AURORA_IS_MODERNNT_DERIVED)
#include <Time/Time.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)
::Sleep(qwTimeout);
#else
std::atomic<bool> value = false;
BooleanWaitable waitable(value);
WaitFor(&waitable, qwTimeout);
#endif
}
AUKN_SYM void SleepNs(AuUInt64 qwTimeout)
{
#if defined(AURORA_IS_LINUX_DERIVED) || defined(AURORA_IS_BSD_DERIVED)
auto qwEndTime = AuTime::SteadyClockNS() + qwTimeout;
if ((usleep(qwTimeout / 1000) == -1) &&
(errno == EINTR))
{
AuUInt64 qwNow;
while ((qwNow = AuTime::SteadyClockNS()) < qwEndTime)
{
usleep((qwEndTime - qwNow) / 1000);
}
}
#else
#if defined(AURORA_IS_MODERNNT_DERIVED)
if (pNtDelayExecution)
{
auto endTimeSteady = AuTime::SteadyClockNS() + qwTimeout;
auto endTimeWall = AuTime::CurrentClockNS() + qwTimeout;
auto targetTimeNt = AuTime::ConvertTimestampNs(endTimeWall);
Win32DropSchedulerResolution();
while (AuTime::SteadyClockNS() < endTimeSteady)
{
LARGE_INTEGER word;
word.QuadPart = targetTimeNt;
pNtDelayExecution(FALSE, &word);
}
return;
}
#endif
auto status = YieldPollNs(true, qwTimeout + Time::SteadyClockNS(), [=]()
{
return false;
});
#endif
}
void InitSleep()
{
// ...
}
}