997 lines
30 KiB
C++
997 lines
30 KiB
C++
/***
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Copyright (C) 2023 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: AuWakeOnAddress.cpp
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Date: 2023-3-10
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "AuWakeOnAddress.hpp"
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#include "Primitives/SMTYield.hpp"
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#if defined(AURORA_PLATFORM_WIN32)
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#include <timeapi.h>
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#endif
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#if defined(AURORA_IS_LINUX_DERIVED)
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#include <unistd.h>
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#endif
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#include <Time/Time.hpp>
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#define HACK_NO_INVALID_ACCESS_LEAK_SHARED_REF_ON_DESTROYED_THREAD
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//#define FALLBACK_WAKEONADDRESS_SUPPORTS_NONEXACT_MATCHING
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namespace Aurora::Threading
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{
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#if defined(HACK_NO_INVALID_ACCESS_LEAK_SHARED_REF_ON_DESTROYED_THREAD)
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static thread_local AuSPtr<WaitEntry> tlsWaitEntry = AuMakeSharedPanic<WaitEntry>();
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#else
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static thread_local WaitEntry tlsWaitEntry;
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#endif
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static ProcessWaitContainer gProcessWaitables;
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static int gShouldSpinOnlyInCPU = 1; // TODO: havent decided
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template<typename T>
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static void DoSpinLockOnVar(T *uPointer)
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{
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if (gShouldSpinOnlyInCPU == 0)
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{
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while (!Primitives::DoTryIf([&]()
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{
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return AuAtomicTestAndSet(uPointer, 0) == 0;
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}))
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{
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}
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}
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else if (gShouldSpinOnlyInCPU == 1)
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{
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while (!Primitives::DoTryIf([&]()
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{
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return AuAtomicTestAndSet(uPointer, 0) == 0;
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}))
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{
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ContextYield();
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}
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}
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else if (gShouldSpinOnlyInCPU == 2)
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{
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while (AuAtomicTestAndSet(uPointer, 0))
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{
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while (*uPointer)
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{
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ContextYield();
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}
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}
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}
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else
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{
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SysUnreachable();
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}
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}
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bool WaitEntry::TryAcquire(const void *pAddress, AuUInt8 uSize)
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{
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DoSpinLockOnVar(&this->uAtomic);
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//AU_LOCK_GUARD(this->mutex);
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if (this->pAddress)
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{
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this->uAtomic = 0;
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return false;
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}
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this->pAddress = pAddress;
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this->uSize = uSize;
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this->uAtomic = 0;
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return true;
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}
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void WaitEntry::Release()
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{
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AuResetMember(this->uSize);
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AuResetMember(this->pAddress);
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}
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WaitEntry::WaitEntry()
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{
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}
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WaitEntry::~WaitEntry()
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{
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this->Release();
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}
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bool WaitEntry::SleepOn(WaitState &state)
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{
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AU_LOCK_GUARD(this->mutex);
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if (state.qwNanosecondsAbs)
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{
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if (!WaitBuffer::From(this->pAddress, this->uSize).Compare(state))
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{
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return true;
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}
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auto uNow = AuTime::SteadyClockNS();
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auto uEndTime = state.qwNanosecondsAbs.value();
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while (uNow < uEndTime)
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{
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if (!WaitBuffer::From(this->pAddress, this->uSize).Compare(state))
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{
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return true;
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}
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auto uTimeRemNS = uEndTime - uNow;
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#if defined(AURORA_PLATFORM_WIN32)
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Win32DropSchedulerResolution();
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#endif
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this->variable.WaitForSignalNsEx(&this->mutex, uTimeRemNS);
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uNow = AuTime::SteadyClockNS();
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}
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return !WaitBuffer::From(this->pAddress, this->uSize).Compare(state);
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}
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else
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{
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while (WaitBuffer::From(this->pAddress, this->uSize).Compare(state))
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{
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this->variable.WaitForSignalNsEx(&this->mutex, 0);
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}
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return true;
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}
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return false;
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}
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bool WaitEntry::TryWake(const void *pAddress)
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{
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DoSpinLockOnVar(&this->uAtomic);
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auto bRet = TryWakeNoLock(pAddress);
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if (!bRet)
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{
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this->uAtomic = 0;
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}
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return bRet;
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}
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bool WaitEntry::TryWakeNoLockNoReallyNoLock(const void *pAddress)
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{
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#if defined(FALLBACK_WAKEONADDRESS_SUPPORTS_NONEXACT_MATCHING)
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if (AuReinterpretCast<const char *>(this->pAddress) > AuReinterpretCast<const char *>(pAddress) ||
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AuReinterpretCast<const char *>(this->pAddress) + this->uSize <= AuReinterpretCast<const char *>(pAddress))
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{
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return false;
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}
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#else
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if (this->pAddress != pAddress)
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{
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return false;
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}
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#endif
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this->uAtomic = 0;
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this->variable.Signal();
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return true;
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}
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bool WaitEntry::TryWakeNoLock(const void *pAddress)
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{
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#if defined(FALLBACK_WAKEONADDRESS_SUPPORTS_NONEXACT_MATCHING)
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if (AuReinterpretCast<const char *>(this->pAddress) > AuReinterpretCast<const char *>(pAddress) ||
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AuReinterpretCast<const char *>(this->pAddress) + this->uSize <= AuReinterpretCast<const char *>(pAddress))
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{
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return false;
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}
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#else
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if (this->pAddress != pAddress)
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{
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return false;
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}
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#endif
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AU_LOCK_GUARD(this->mutex);
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this->uAtomic = 0;
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this->variable.Signal();
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return true;
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}
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WaitBuffer WaitBuffer::From(const void *pBuf, AuUInt8 uSize)
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{
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WaitBuffer wait;
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AuMemcpy(wait.buffer, pBuf, uSize);
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wait.uSize = uSize;
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return AuMove(wait);
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}
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bool WaitBuffer::Compare(const void *pBuf)
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{
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return AuMemcmp(this->buffer, pBuf, this->uSize) == 0;
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}
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bool WaitBuffer::Compare(WaitState &state)
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{
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if (!state.uDownsizeMask)
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{
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return AuMemcmp(this->buffer, state.compare.buffer, AuMin(this->uSize, state.compare.uSize)) == 0;
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}
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else
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{
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auto uMask = state.uDownsizeMask.value();
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auto &uSrcWord = *AuReinterpretCast<AuUInt32 *>(this->buffer);
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auto &uCmpWord = *AuReinterpretCast<AuUInt32 *>(state.compare.buffer);
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return (uSrcWord & uMask) == (uCmpWord & uMask);
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}
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}
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WaitEntry *ProcessWaitNodeContainer::WaitBufferFrom(const void *pAddress, AuUInt8 uSize)
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{
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#if defined(HACK_NO_INVALID_ACCESS_LEAK_SHARED_REF_ON_DESTROYED_THREAD)
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auto pReturn = tlsWaitEntry.get();
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#else
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auto pReturn = &tlsWaitEntry;
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#endif
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pReturn->bReleaseOnWake = true;
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pReturn->pAddress = pAddress;
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pReturn->uSize = uSize;
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pReturn->uAtomic = 0;
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{
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Lock();
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if (auto pLoadFromMemory = this->waitList.pHead)
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{
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pReturn->pNext = pLoadFromMemory;
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pLoadFromMemory->pBefore = pReturn;
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}
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else
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{
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this->waitList.pTail = pReturn;
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}
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this->waitList.pHead = pReturn;
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Unlock();
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}
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return pReturn;
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}
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template <typename T>
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bool ProcessWaitNodeContainer::IterateWake(T callback)
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{
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bool bRetStatus { true };
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Lock();
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{
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// FIFO
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auto pCurrentHead = this->waitList.pTail;
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decltype(pCurrentHead) pLast {};
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while (pCurrentHead)
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{
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AU_LOCK_GUARD(pCurrentHead->mutex);
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auto [bCont, bRemove] = callback(*pCurrentHead);
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if (bRemove)
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{
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if (pLast)
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{
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pLast->pNext = pCurrentHead->pNext;
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}
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if (this->waitList.pHead == pCurrentHead)
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{
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this->waitList.pHead = pCurrentHead->pNext;
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}
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if (pCurrentHead->pNext)
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{
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pCurrentHead->pNext->pBefore = pCurrentHead->pBefore;
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}
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if (this->waitList.pTail == pCurrentHead)
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{
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this->waitList.pTail = pCurrentHead->pBefore;
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}
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}
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if (!bCont)
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{
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bRetStatus = false;
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break;
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}
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pLast = pCurrentHead;
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pCurrentHead = pCurrentHead->pBefore;
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}
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}
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Unlock();
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return bRetStatus;
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}
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void ProcessWaitNodeContainer::Lock()
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{
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DoSpinLockOnVar(&this->uAtomic);
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}
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void ProcessWaitNodeContainer::Unlock()
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{
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this->uAtomic = 0;
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}
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WaitEntry *ProcessWaitContainer::WaitBufferFrom(const void *pAddress, AuUInt8 uSize)
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{
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#if defined(FALLBACK_WAKEONADDRESS_SUPPORTS_NONEXACT_MATCHING)
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auto pAddressIDC = (void *)(AuUInt(pAddress) & ~(8 - 1));
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#else
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auto pAddressIDC = pAddress;
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#endif
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return this->list[AuHashCode(pAddressIDC) % AuArraySize(this->list)].WaitBufferFrom(pAddress, uSize);
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}
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template <typename T>
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bool ProcessWaitContainer::IterateWake(const void *pAddress, T callback)
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{
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#if defined(FALLBACK_WAKEONADDRESS_SUPPORTS_NONEXACT_MATCHING)
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auto pAddressIDC = (void *)(AuUInt(pAddress) & ~(8 - 1));
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#else
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auto pAddressIDC = pAddress;
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#endif
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return this->list[AuHashCode(pAddressIDC) % AuArraySize(this->list)].IterateWake(callback);
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}
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AUKN_SYM bool IsWaitOnRecommended()
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{
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if (Primitives::ThrdCfg::gPreferEmulatedWakeOnAddress)
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{
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return false;
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}
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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static AuOptionalEx<bool> gIsWaitOnRecommendedCache {};
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if (gIsWaitOnRecommendedCache)
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{
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return gIsWaitOnRecommendedCache.value();
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}
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bool bState = pWaitOnAddress &&
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AuSwInfo::IsWindows8Point1OrGreater();
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gIsWaitOnRecommendedCache = bState;
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return bState;
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#elif defined(AURORA_PLATFORM_LINUX)
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return true;
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#endif
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return false;
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}
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/// @deprecated
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AUKN_SYM const AuList<AuUInt8> &GetValidWordSizes()
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{
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static const AuList<AuUInt8> kArray =
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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{ 1, 2, 4, 8 };
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#else
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{ 4 };
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#endif
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return kArray;
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}
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bool WaitOnAddressWide(const void *pTargetAddress,
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const void *pCompareAddress,
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AuUInt8 uWordSize,
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AuOptional<AuUInt64> qwNanoseconds,
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AuOptional<AuUInt64> qwNanosecondsAbs,
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bool bOSSupportsWait
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)
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{
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WaitState state;
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SysAssertDbg(uWordSize <= 8);
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auto pWaitEntry = gProcessWaitables.WaitBufferFrom(pTargetAddress, uWordSize);
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state.compare = WaitBuffer::From(pCompareAddress, uWordSize);
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if (qwNanoseconds)
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{
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state.qwNanosecondsAbs = AuTime::SteadyClockNS() + qwNanoseconds.value();
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}
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else if (qwNanosecondsAbs)
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{
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state.qwNanosecondsAbs = qwNanosecondsAbs.value();
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}
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#if defined(HACK_NO_INVALID_ACCESS_LEAK_SHARED_REF_ON_DESTROYED_THREAD)
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auto pTempHoldMe = tlsWaitEntry;
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#endif
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auto bResult = pWaitEntry->SleepOn(state);
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#if defined(HACK_NO_INVALID_ACCESS_LEAK_SHARED_REF_ON_DESTROYED_THREAD)
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pTempHoldMe.reset();
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#endif
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return bResult;
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}
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AuTuple<const void *, AuUInt8, AuOptionalEx<AuUInt32>> DecodeAddress(const void *pAddress,
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AuUInt32 uWordSize)
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{
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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return AuMakeTuple(pAddress, 0, AuOptionalEx<AuUInt32> {});
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#endif
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auto pRounded = AuPageRound(AuUInt(pAddress), AuUInt(4));
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auto uDelta = (AuUInt)pAddress - pRounded;
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if (uWordSize == 8)
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{
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return AuMakeTuple((const void *)pRounded, uDelta, 0xFFFFFFFF);
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}
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AuUInt32 uSizeMask = (1ull << (uWordSize * 8)) - 1ull;
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switch (uDelta)
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{
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case 0:
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return AuMakeTuple(pAddress, 0, 0xFFFFFFFF & (uSizeMask << 0));
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case 1:
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return AuMakeTuple(pAddress, 1, 0xFFFFFF00 & (uSizeMask << 8));
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case 2:
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return AuMakeTuple(pAddress, 2, 0xFFFF0000 & (uSizeMask << 16));
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case 3:
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return AuMakeTuple(pAddress, 3, 0xFF000000 & (uSizeMask << 24));
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default:
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SysPanic("Invalid Branch");
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}
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}
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static bool RunOSWaitOnAddressNoTimed(const void *pTargetAddress,
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const void *pCompareAddress,
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AuUInt8 uWordSize)
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{
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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if (pRtlWaitOnAddress)
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{
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return pRtlWaitOnAddress((void *)pTargetAddress, (void *)pCompareAddress, uWordSize, nullptr);
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}
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else
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{
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return pWaitOnAddress((void *)pTargetAddress, (void *)pCompareAddress, uWordSize, INFINITE);
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}
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#endif
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#if defined(AURORA_IS_LINUX_DERIVED)
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int ret {};
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#if defined(AU_CPU_ENDIAN_BIG)
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if (uWordSize == 8)
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{
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pTargetAddress = AuReinterpretCast<const char *>(pTargetAddress) + 4;
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pCompareAddress = AuReinterpretCast<const char *>(pCompareAddress) + 4;
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}
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#endif
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auto uCurrent = *(AuUInt32 *)pCompareAddress;
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auto expect = WaitBuffer::From(pCompareAddress, uWordSize);
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do
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{
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ret = futex_wait((AuUInt32 *)pTargetAddress, uCurrent, nullptr);
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if (ret == 0)
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{
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continue;
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}
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if (ret == -EAGAIN)
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{
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continue;
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}
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if (ret == -ETIMEDOUT)
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{
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return false;
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}
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}
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while (ret == -EINTR);
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return !expect.Compare(pTargetAddress);
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#endif
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return false;
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}
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static bool RunOSWaitOnAddressTimed(const void *pTargetAddress,
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const void *pCompareAddress,
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AuUInt8 uWordSize,
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AuUInt64 uAbsTimeSteadyClock,
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AuUInt64 uRelativeNanoseconds,
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AuOptional<AuUInt64> uAbsTimeAltClock /* hint */)
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{
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#if defined(AURORA_IS_MODERNNT_DERIVED)
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if (pRtlWaitOnAddress)
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{
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auto expect = WaitBuffer::From(pCompareAddress, uWordSize);
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AuUInt64 uNow {};
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while (uAbsTimeSteadyClock ?
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(uAbsTimeSteadyClock > (uNow = AuTime::SteadyClockNS())) :
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true)
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{
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LARGE_INTEGER word {};
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if (uAbsTimeAltClock)
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{
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word.QuadPart = AuTime::ConvertTimestampNs(uAbsTimeAltClock.value());
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}
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else if (uAbsTimeSteadyClock)
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{
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if (uAbsTimeSteadyClock <= uNow)
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{
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return !WaitBuffer::From(pCompareAddress, uWordSize).Compare(pTargetAddress);
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}
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word.QuadPart = -(AuInt64(uAbsTimeSteadyClock - uNow) / 100ull);
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if (!word.QuadPart)
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{
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word.QuadPart = 1;
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}
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}
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if (expect.Compare(pTargetAddress))
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{
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pRtlWaitOnAddress(pTargetAddress, pCompareAddress, uWordSize, &word);
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if (!expect.Compare(pTargetAddress))
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{
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return true;
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}
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else if (!uAbsTimeSteadyClock)
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{
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return false;
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}
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}
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else
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{
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return true;
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}
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}
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return false;
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}
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else
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{
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// ~~some paths might miss the uRelativeNanoseconds, like cas loops.~~
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// most paths will now skimp on the relative values
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if (uAbsTimeSteadyClock && !uRelativeNanoseconds)
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|
{
|
|
AuInt64 iDelta = uAbsTimeSteadyClock;
|
|
iDelta -= AuTime::SteadyClockNS();
|
|
|
|
if (iDelta <= 0)
|
|
{
|
|
return !WaitBuffer::From(pCompareAddress, uWordSize).Compare(pTargetAddress);
|
|
}
|
|
|
|
uRelativeNanoseconds = iDelta;
|
|
}
|
|
|
|
auto uMaxSwitches = gRuntimeConfig.threadingConfig.uUWPNanosecondEmulationMaxYields;
|
|
auto bUWPNanosecondEmulationCheckFirst = Primitives::ThrdCfg::gUWPNanosecondEmulationCheckFirst;
|
|
|
|
// LockN(<1MS) on a platform without that resolution of yielding... damn
|
|
auto uMS = AuNSToMS<AuUInt32>(uRelativeNanoseconds);
|
|
if (!uMS)
|
|
{
|
|
// take a copy
|
|
auto expect = WaitBuffer::From(pCompareAddress, uWordSize);
|
|
|
|
// first: cpu spin to avoid the kernel all together
|
|
if (TryWaitOnAddress((void *)pTargetAddress, (void *)pCompareAddress, uWordSize))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// second: yield
|
|
unsigned uLimit {};
|
|
do
|
|
{
|
|
if (!expect.Compare(pTargetAddress))
|
|
{
|
|
break;
|
|
}
|
|
|
|
AuThreading::ContextYield();
|
|
|
|
if (bUWPNanosecondEmulationCheckFirst)
|
|
{
|
|
if (uLimit++ > uMaxSwitches)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
while (uAbsTimeSteadyClock > AuTime::SteadyClockNS()); // ...until times up
|
|
}
|
|
else // high level lock function was called with ms scale resolution
|
|
{
|
|
// first: wait on the address with an ms scale timeout
|
|
(void)pWaitOnAddress((void *)pTargetAddress, (void *)pCompareAddress, uWordSize, uMS);
|
|
|
|
// never trust the error value/status provided by wait addresses - instead, do a quick compare
|
|
if (!WaitBuffer::From(pCompareAddress, uWordSize).Compare(pTargetAddress))
|
|
{
|
|
// best case: we woke up during the ms-res waitonaddress
|
|
return true;
|
|
}
|
|
|
|
// attempt to yield again, potentially context switching a few times to hit any NS remainder
|
|
AuUInt64 uNow {};
|
|
unsigned uLimit {};
|
|
while (uAbsTimeSteadyClock > (uNow = AuTime::SteadyClockNS()))
|
|
{
|
|
uMS = AuNSToMS<AuUInt32>(uAbsTimeSteadyClock - uNow);
|
|
|
|
if (Primitives::DoTryIf([=]()
|
|
{
|
|
return !WaitBuffer::From(pCompareAddress, uWordSize).Compare(pTargetAddress);
|
|
}))
|
|
{
|
|
// hit it within the span of 1 << SpinLoopPowerA SMT stalls
|
|
return true;
|
|
}
|
|
|
|
if (!uMS)
|
|
{
|
|
// burn off any remainder cycles by switching contexts (this isnt a very long time usually)
|
|
if (uLimit++ < uMaxSwitches)
|
|
{
|
|
AuThreading::ContextYield();
|
|
}
|
|
else
|
|
{
|
|
// do not burn the cpu to meet the timeout. we'll just undershoot.
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
(void)pWaitOnAddress((void *)pTargetAddress, (void *)pCompareAddress, uWordSize, uMS);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(AURORA_IS_LINUX_DERIVED)
|
|
int ret {};
|
|
|
|
#if defined(AU_CPU_ENDIAN_BIG)
|
|
if (uWordSize == 8)
|
|
{
|
|
pTargetAddress = AuReinterpretCast<const char *>(pTargetAddress) + 4;
|
|
pCompareAddress = AuReinterpretCast<const char *>(pCompareAddress) + 4;
|
|
}
|
|
#endif
|
|
|
|
auto uCurrent = *(AuUInt32 *)pCompareAddress;
|
|
|
|
struct timespec tspec;
|
|
Time::monoabsns2ts(&tspec, uAbsTimeAltClock ? uAbsTimeAltClock.value() : uAbsTimeSteadyClock);
|
|
|
|
do
|
|
{
|
|
ret = futex_wait((AuUInt32 *)pTargetAddress, uCurrent, &tspec);
|
|
|
|
if (ret == 0)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (ret == -EAGAIN)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (ret == -ETIMEDOUT)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
while (ret == -EINTR);
|
|
|
|
#endif
|
|
|
|
return !WaitBuffer::From(pCompareAddress, uWordSize).Compare(pTargetAddress);
|
|
}
|
|
|
|
static void RunOSWaitOnAddressNoTimedNoErrors(const void *pTargetAddress,
|
|
const void *pCompareAddress,
|
|
WaitState &state)
|
|
{
|
|
while (WaitBuffer::From(pTargetAddress, state.uWordSize).Compare(state))
|
|
{
|
|
if (!RunOSWaitOnAddressNoTimed(pTargetAddress, pCompareAddress, state.uWordSize))
|
|
{
|
|
AuThreading::ContextYield();
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool RunOSWaitOnAddressTimedSteady(const void *pTargetAddress,
|
|
const void *pCompareAddress,
|
|
WaitState &state)
|
|
{
|
|
if (!WaitBuffer::From(pTargetAddress, state.uWordSize).Compare(state))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
(void)RunOSWaitOnAddressTimed(pTargetAddress, pCompareAddress, state.uWordSize, state.qwNanosecondsAbs.value(), { }, { });
|
|
return !WaitBuffer::From(pTargetAddress, state.uWordSize).Compare(state);
|
|
}
|
|
|
|
static void RunOSWakeNOnAddress(const void *pAddress,
|
|
AuUInt32 dwCount)
|
|
{
|
|
#if defined(AURORA_IS_LINUX_DERIVED)
|
|
futex_wake((AuUInt32 *)pAddress, dwCount);
|
|
#endif
|
|
|
|
#if defined(AURORA_IS_MODERNNT_DERIVED)
|
|
if (pRtlWakeAddressSingle)
|
|
{
|
|
if (dwCount < 6)
|
|
{
|
|
for (AuUInt i = 0; i < dwCount; i++)
|
|
{
|
|
pRtlWakeAddressSingle((void *)pAddress);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pRtlWakeByAddressAll((void *)pAddress);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (AuUInt i = 0; i < dwCount; i++)
|
|
{
|
|
pWakeByAddressSingle((void *)pAddress);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void RunOSWakeAllOnAddress(const void *pAddress)
|
|
{
|
|
#if defined(AURORA_IS_LINUX_DERIVED)
|
|
futex_wake((AuUInt32 *)pAddress, INT_MAX);
|
|
#endif
|
|
|
|
#if defined(AURORA_IS_MODERNNT_DERIVED)
|
|
if (pRtlWakeByAddressAll)
|
|
{
|
|
pRtlWakeByAddressAll((void *)pAddress);
|
|
}
|
|
else
|
|
{
|
|
pWakeByAddressAll((void *)pAddress);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// Windows 8+ thread primitives might use me instead of the public API
|
|
// it does work on Linux and Windows 8+
|
|
// it does not, however, work on emulated platforms
|
|
// this is intentional
|
|
bool InternalLTSWaitOnAddressHighRes(const void *pTargetAddress,
|
|
const void *pCompareAddress,
|
|
AuUInt8 uWordSize,
|
|
AuUInt64 qwNanosecondsAbs)
|
|
{
|
|
auto [pWaitAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, uWordSize);
|
|
auto pCompareAddress2 = AuReinterpretCast<const char *>(pCompareAddress) - uDelta;
|
|
|
|
WaitState state;
|
|
state.uDownsizeMask = uMask;
|
|
state.compare = uMask ?
|
|
WaitBuffer::From(pCompareAddress2, 4) :
|
|
WaitBuffer::From(pCompareAddress2, uWordSize);
|
|
state.uWordSize = uMask ? 4 : uWordSize;
|
|
|
|
if (!qwNanosecondsAbs)
|
|
{
|
|
RunOSWaitOnAddressNoTimedNoErrors(pWaitAddress, pCompareAddress2, state);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
state.qwNanosecondsAbs = qwNanosecondsAbs;
|
|
return RunOSWaitOnAddressTimedSteady(pWaitAddress, pCompareAddress2, state);
|
|
}
|
|
}
|
|
|
|
void InternalLTSWakeAll(const void *pTargetAddress)
|
|
{
|
|
auto [pWakeAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, 1);
|
|
RunOSWakeAllOnAddress(pWakeAddress);
|
|
}
|
|
|
|
void InternalLTSWakeOne(const void *pTargetAddress)
|
|
{
|
|
auto [pWakeAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, 1);
|
|
RunOSWakeNOnAddress(pWakeAddress, uDelta ? INT_MAX : 1);
|
|
}
|
|
|
|
void InternalLTSWakeCount(const void *pTargetAddress, AuUInt32 uCount)
|
|
{
|
|
auto [pWakeAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, 1);
|
|
RunOSWakeNOnAddress(pWakeAddress, uDelta ? INT_MAX : uCount);
|
|
}
|
|
|
|
AUKN_SYM bool WaitOnAddress(const void *pTargetAddress,
|
|
const void *pCompareAddress,
|
|
AuUInt8 uWordSize,
|
|
AuUInt64 qwNanoseconds)
|
|
{
|
|
bool bWaitOnAddress = IsWaitOnRecommended();
|
|
if (bWaitOnAddress)
|
|
{
|
|
auto [pWaitAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, uWordSize);
|
|
auto pCompareAddress2 = AuReinterpretCast<const char *>(pCompareAddress) - uDelta;
|
|
|
|
WaitState state;
|
|
state.uDownsizeMask = uMask;
|
|
state.compare = uMask ?
|
|
WaitBuffer::From(pCompareAddress2, 4) :
|
|
WaitBuffer::From(pCompareAddress2, uWordSize);
|
|
state.uWordSize = uMask ? 4 : uWordSize;
|
|
|
|
if (!qwNanoseconds)
|
|
{
|
|
RunOSWaitOnAddressNoTimedNoErrors(pWaitAddress, pCompareAddress2, state);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
state.qwNanosecondsAbs = qwNanoseconds + AuTime::SteadyClockNS();
|
|
return RunOSWaitOnAddressTimedSteady(pWaitAddress, pCompareAddress2, state);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (Primitives::ThrdCfg::gPreferWaitOnAddressAlwaysSpin)
|
|
{
|
|
if (TryWaitOnAddress(pTargetAddress, pCompareAddress, uWordSize))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return WaitOnAddressWide(pTargetAddress, pCompareAddress, uWordSize, qwNanoseconds, {}, false);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
AUKN_SYM bool TryWaitOnAddress(const void *pTargetAddress,
|
|
const void *pCompareAddress,
|
|
AuUInt8 uWordSize)
|
|
{
|
|
return Primitives::DoTryIf([=]()
|
|
{
|
|
return !WaitBuffer::From(pCompareAddress, uWordSize).Compare(pTargetAddress);
|
|
});
|
|
}
|
|
|
|
AUKN_SYM void WakeNOnAddress(const void *pTargetAddress,
|
|
AuUInt8 uNMaximumThreads)
|
|
{
|
|
if (IsWaitOnRecommended())
|
|
{
|
|
auto [pWakeAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, 1);
|
|
RunOSWakeNOnAddress(pWakeAddress, uDelta ? INT_MAX : uNMaximumThreads);
|
|
}
|
|
else
|
|
{
|
|
(void)gProcessWaitables.IterateWake(pTargetAddress, [&](WaitEntry &entry) -> AuPair<bool, bool>
|
|
{
|
|
if (!uNMaximumThreads)
|
|
{
|
|
return AuMakePair(false, false);
|
|
}
|
|
|
|
bool bWake {};
|
|
if (entry.TryWakeNoLockNoReallyNoLock(pTargetAddress))
|
|
{
|
|
bWake = true;
|
|
uNMaximumThreads--;
|
|
}
|
|
|
|
bool bCont = uNMaximumThreads != 0;
|
|
return AuMakePair(bCont, bWake);
|
|
});
|
|
}
|
|
}
|
|
|
|
AUKN_SYM void WakeOnAddress(const void *pTargetAddress)
|
|
{
|
|
WakeNOnAddress(pTargetAddress, 1);
|
|
}
|
|
|
|
AUKN_SYM void WakeAllOnAddress(const void *pTargetAddress)
|
|
{
|
|
if (IsWaitOnRecommended())
|
|
{
|
|
auto [pWakeAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, 1);
|
|
RunOSWakeAllOnAddress(pWakeAddress);
|
|
}
|
|
else
|
|
{
|
|
(void)gProcessWaitables.IterateWake(pTargetAddress, [&](WaitEntry &entry) -> AuPair<bool, bool>
|
|
{
|
|
return AuMakePair(true, entry.TryWakeNoLockNoReallyNoLock(pTargetAddress));
|
|
});
|
|
}
|
|
}
|
|
|
|
AUKN_SYM bool WaitOnAddressSteady(const void *pTargetAddress,
|
|
const void *pCompareAddress,
|
|
AuUInt8 uWordSize,
|
|
AuUInt64 qwNanoseconds)
|
|
{
|
|
bool bWaitOnAddress = IsWaitOnRecommended();
|
|
if (bWaitOnAddress)
|
|
{
|
|
auto [pWaitAddress, uDelta, uMask] = DecodeAddress(pTargetAddress, uWordSize);
|
|
auto pCompareAddress2 = AuReinterpretCast<const char *>(pCompareAddress) - uDelta;
|
|
|
|
WaitState state;
|
|
state.uDownsizeMask = uMask;
|
|
state.compare = uMask ?
|
|
WaitBuffer::From(pCompareAddress2, 4) :
|
|
WaitBuffer::From(pCompareAddress2, uWordSize);
|
|
state.uWordSize = uMask ? 4 : uWordSize;
|
|
|
|
if (!qwNanoseconds)
|
|
{
|
|
RunOSWaitOnAddressNoTimedNoErrors(pWaitAddress, pCompareAddress2, state);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
state.qwNanosecondsAbs = qwNanoseconds;
|
|
return RunOSWaitOnAddressTimedSteady(pWaitAddress, pCompareAddress2, state);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (Primitives::ThrdCfg::gPreferWaitOnAddressAlwaysSpin)
|
|
{
|
|
if (TryWaitOnAddress(pTargetAddress, pCompareAddress, uWordSize))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return WaitOnAddressWide(pTargetAddress, pCompareAddress, uWordSize, {}, qwNanoseconds, false);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
} |