Reece Wilson
72dc0d715e
[+] IOProcessor::WakeupThread [+] NT: Begin hacking in timeBeginPeriod (must spam it in some places) [+] ConsoleTTY (more specifically the win32 calls) are too slow to run on the mainthread. Delegate to worker. [*] AuTime.CurrentClockSteady [*] AuTime.CurrentClockSteadyMS [*] AuTime.CurrentClockSteadyNS
105 lines
2.5 KiB
C++
105 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: AuSemaphore.Win32.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 "AuSemaphore.Generic.hpp"
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#include "AuSemaphore.NT.hpp"
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#if !defined(_AURUNTIME_GENERIC_SEMAPHORE)
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namespace Aurora::Threading::Primitives
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{
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Semaphore::Semaphore(long iIntialValue)
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{
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this->value_ = iIntialValue;
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InitializeSRWLock(&this->lock_);
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InitializeConditionVariable(&this->winCond_);
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}
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Semaphore::~Semaphore()
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{
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}
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bool Semaphore::HasOSHandle(AuMach &mach)
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{
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return false;
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}
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bool Semaphore::HasLockImplementation()
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{
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return true;
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}
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bool Semaphore::TryLock()
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{
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auto old = this->value_;
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return (old != 0 && AuAtomicCompareExchange(&this->value_, old - 1, old) == old);
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}
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bool Semaphore::Lock(AuUInt64 timeout)
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{
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AuUInt64 start = AuTime::CurrentClockSteadyMS();
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AuUInt64 end = start + timeout;
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AcquireSRWLockShared(&lock_); // we use atomics. using shared is fine, let's not get congested early
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while (!TryLock())
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{
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AuUInt32 timeoutMs = INFINITE;
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if (timeout != 0)
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{
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start = Time::CurrentClockSteadyMS();
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if (start >= end)
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{
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ReleaseSRWLockShared(&this->lock_);
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return false;
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}
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timeoutMs = end - start;
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}
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if (!::SleepConditionVariableSRW(&this->winCond_, &this->lock_, AuUInt32(timeoutMs), CONDITION_VARIABLE_LOCKMODE_SHARED))
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{
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ReleaseSRWLockShared(&this->lock_);
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return false;
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}
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}
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ReleaseSRWLockShared(&this->lock_);
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return true;
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}
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void Semaphore::Lock()
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{
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auto status = Lock(0);
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SysAssert(status, "Couldn't lock semaphore");
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}
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void Semaphore::Unlock(long count)
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{
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AcquireSRWLockShared(&this->lock_);
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AuAtomicAdd<AuInt32>(&this->value_, count);
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::WakeAllConditionVariable(&this->winCond_);
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ReleaseSRWLockShared(&this->lock_);
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}
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void Semaphore::Unlock()
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{
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return Unlock(1);
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}
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AUKN_SYM ISemaphore *SemaphoreNew(int iInitialCount)
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{
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return _new Semaphore(iInitialCount);
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}
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AUKN_SYM void SemaphoreRelease(ISemaphore *pSemaphore)
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{
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AuSafeDelete<Semaphore *>(pSemaphore);
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}
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}
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#endif |