Collaboration diagram for Spinlock:

Public Member Functions
	Spinlock (bool bLocked, bool bAvoidTracking=false)

bool	acquire (bool recurse=false, bool safe=true)

void	exit (uintptr_t ra=0)

void	release ()

bool	acquired ()

bool	interrupts () const

Static Public Attributes
static const bool	allow_recursion = true

Private Member Functions
bool	acquireContended (bool recurse, bool safe, uintptr_t ra) NEVER_INLINE

void	unlock (uintptr_t ra) ALWAYS_INLINE

void	unwind () ALWAYS_INLINE

volatile processor_register_t *	deferredReleaseWord ()

void	unlockForScheduler ()

void	trackRelease (uintptr_t ra) const

uintptr_t	acquisitionAddress () const

void	badMagic (uintptr_t ra) const NEVER_INLINE

void	badReleaseInterrupts () const NEVER_INLINE

void	deadlock (uintptr_t ra, bool releasing, uintptr_t acquiredAt=0) NEVER_INLINE NORETURN

	NOT_COPYABLE_OR_ASSIGNABLE (Spinlock)

Private Attributes
SpinlockWord	m_Lock

bool	m_bInterrupts = false

void *	m_pOwner = nullptr

size_t	m_Level = 0

size_t	m_OwnedProcessor = ~0

bool	m_bAvoidTracking = false

Friends
class	PerProcessorScheduler

class	LocksCommand

Detailed Description

Definition at line 27 of file Spinlock.h.

Constructor & Destructor Documentation

◆ Spinlock()

Spinlock::Spinlock	(	bool	bLocked,
		bool	bAvoidTracking = `false`
	)

Definition at line 32 of file Spinlock.cc.

Member Function Documentation

◆ acquire()

bool Spinlock::acquire	(	bool	recurse = `false`,
		bool	safe = `true`
	)

Enter the critical section.

The 'safe' param disables certain deadlock checks that might fail in some circumstances (especially during multiprocessor startup). It really shouldn't be used for the majority of cases.

Definition at line 35 of file Spinlock.cc.

References acquireContended(), ProcessorBase::getInterrupts(), ProcessorBase::index(), ProcessorBase::information(), panic(), LocksCommand::setFatal(), ProcessorBase::setInterrupts(), and UNLIKELY.

Referenced by PosixSubsystem::acquire(), Scheduler::acquireFirstProcessOfType(), Scheduler::acquireProcess(), Scheduler::acquireProcess(), Scheduler::acquireProcessById(), Scheduler::acquireThreadByTaskId(), Rtc::addAlarm(), Log::addEntry(), VFS::addMountCallback(), VFS::addProbeCallback(), Scheduler::addProcess(), Scheduler::addThread(), PerProcessorScheduler::addThread(), PerProcessorScheduler::addThread(), HostedPhysicalMemoryManager::allocatePage(), X86CommonPhysicalMemoryManager::allocatePage(), Process::beginTermination(), X64VirtualAddressSpace::clone(), HostedVirtualAddressSpace::doAllocateStack(), X64VirtualAddressSpace::doAllocateStack(), Ohci::doAsync(), Scheduler::drainDeferredTimeAccounting(), Rtc::drainRemoteAlarmDispatch(), NetworkFilter::filter(), HostedVirtualAddressSpace::freeStack(), X64VirtualAddressSpace::freeStack(), Scheduler::getChildProcess(), Scheduler::getNumProcesses(), ThreadedIrqDispatcher::initialise(), NMFaultHandler::initialiseProcessor(), Cache::insert(), Cache::insert(), NetworkFilter::installCallback(), KernelElf::lockModules(), InputManager::mainThread(), VFS::mount(), Rtc::processElapsedTime(), HostedTimer::processTimerBatch(), InputManager::putNotification(), Process::quiesceTermination(), PosixSubsystem::release(), Rtc::removeAlarm(), Rtc::removeAlarm(), NetworkFilter::removeCallback(), VFS::removeMountCallback(), VFS::removeProbeCallback(), Scheduler::removeProcess(), Scheduler::removeThread(), Process::reserveTerminalOwner(), Thread::retainTemporarySignalWaitInterruptionOrClear(), ThreadedIrqDispatcher::setRemoteWakeCallback(), InputManager::shutdown(), Thread::Thread(), Thread::Thread(), Scheduler::threadInSchedule(), PageFaultHandler::unregisterHandler(), TimerHandlerRegistry::unregisterHandler(), IrqHandlerRegistry::unregisterHandler(), Scheduler::waitUntilProcessRemoved(), NetworkFilter::~NetworkFilter(), PosixSubsystem::~PosixSubsystem(), and VFS::~VFS().

◆ acquireContended()

bool Spinlock::acquireContended	(	bool	recurse,
		bool	safe,
		uintptr_t	ra
	)

private

Returns true for recursive reentry, false for a newly acquired lock.

Definition at line 82 of file Spinlock.cc.

References LocksCommand::checkState(), ProcessorBase::getCount(), ProcessorBase::index(), ProcessorBase::information(), panic(), ProcessorBase::pause(), and LocksCommand::setFatal().

Referenced by acquire().

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◆ acquired()

bool Spinlock::acquired ( )

Definition at line 193 of file Spinlock.cc.

◆ acquisitionAddress()

uintptr_t Spinlock::acquisitionAddress ( ) const

private

Definition at line 201 of file Spinlock.cc.

◆ badMagic()

void Spinlock::badMagic ( uintptr_t ra ) const

private

Definition at line 209 of file Spinlock.cc.

◆ badReleaseInterrupts()

void Spinlock::badReleaseInterrupts ( ) const

private

Definition at line 219 of file Spinlock.cc.

◆ deadlock()

void Spinlock::deadlock	(	uintptr_t	ra,
		bool	releasing,
		uintptr_t	acquiredAt = `0`
	)

private

Definition at line 224 of file Spinlock.cc.

◆ deferredReleaseWord()

volatile processor_register_t * Spinlock::deferredReleaseWord ( )

private

Scheduler owns tracking and IRQ restoration across these handoffs.

Definition at line 183 of file Spinlock.cc.

References unwind().

Referenced by PerProcessorScheduler::addThread(), and PerProcessorScheduler::addThread().

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◆ exit()

void Spinlock::exit ( uintptr_t ra = 0 )

Exit the critical section, without restoring interrupts.

Definition at line 157 of file Spinlock.cc.

References unlock().

◆ interrupts()

bool Spinlock::interrupts ( ) const

Definition at line 197 of file Spinlock.cc.

◆ release()

void Spinlock::release ( )

Exit the critical section, restoring previous interrupt state.

Definition at line 161 of file Spinlock.cc.

References ProcessorBase::setInterrupts(), and unlock().

Referenced by PosixSubsystem::acquire(), Scheduler::acquireFirstProcessOfType(), Scheduler::acquireProcess(), Scheduler::acquireProcess(), Scheduler::acquireProcessById(), Scheduler::acquireThreadByTaskId(), Rtc::addAlarm(), Log::addEntry(), VFS::addMountCallback(), VFS::addProbeCallback(), Scheduler::addProcess(), Scheduler::addThread(), PerProcessorScheduler::addThread(), PerProcessorScheduler::addThread(), HostedPhysicalMemoryManager::allocatePage(), X86CommonPhysicalMemoryManager::allocatePage(), Process::beginTermination(), HostedVirtualAddressSpace::clone(), X64VirtualAddressSpace::clone(), HostedVirtualAddressSpace::doAllocateStack(), X64VirtualAddressSpace::doAllocateStack(), Ohci::doAsync(), Scheduler::drainDeferredTimeAccounting(), Rtc::drainRemoteAlarmDispatch(), NetworkFilter::filter(), HostedPhysicalMemoryManager::freePageUnlocked(), HostedVirtualAddressSpace::freeStack(), X64VirtualAddressSpace::freeStack(), Scheduler::getChildProcess(), Scheduler::getNumProcesses(), ThreadedIrqDispatcher::initialise(), NMFaultHandler::initialiseProcessor(), Cache::insert(), Cache::insert(), NetworkFilter::installCallback(), InputManager::mainThread(), VFS::mount(), Rtc::processElapsedTime(), HostedTimer::processTimerBatch(), InputManager::putNotification(), Process::quiesceTermination(), PosixSubsystem::release(), Rtc::removeAlarm(), Rtc::removeAlarm(), NetworkFilter::removeCallback(), VFS::removeMountCallback(), VFS::removeProbeCallback(), Scheduler::removeProcess(), Scheduler::removeThread(), Process::reserveTerminalOwner(), Thread::retainTemporarySignalWaitInterruptionOrClear(), ThreadedIrqDispatcher::setRemoteWakeCallback(), InputManager::shutdown(), Scheduler::threadInSchedule(), KernelElf::unlockModules(), PageFaultHandler::unregisterHandler(), TimerHandlerRegistry::unregisterHandler(), IrqHandlerRegistry::unregisterHandler(), Scheduler::waitUntilProcessRemoved(), NetworkFilter::~NetworkFilter(), PosixSubsystem::~PosixSubsystem(), and VFS::~VFS().

◆ trackRelease()

void Spinlock::trackRelease ( uintptr_t ra ) const

private

Track the release of this lock.

Definition at line 115 of file Spinlock.cc.

References LocksCommand::lockReleased(), panic(), and LocksCommand::setFatal().

Referenced by unlock().

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◆ unlock()

void Spinlock::unlock ( uintptr_t ra )

inlineprivate

Unlocks without restoring IRQ state, leaving nested acquisitions held.

Definition at line 127 of file Spinlock.cc.

References ProcessorBase::getInterrupts(), trackRelease(), and UNLIKELY.

Referenced by exit(), and release().

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◆ unlockForScheduler()

void Spinlock::unlockForScheduler ( )

private

Definition at line 188 of file Spinlock.cc.

◆ unwind()

void Spinlock::unwind ( )

inlineprivate

Unwind the spinlock because a thread is releasing it.

Definition at line 174 of file Spinlock.cc.

Referenced by deferredReleaseWord().

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Friends And Related Symbol Documentation

◆ LocksCommand

friend class LocksCommand

friend

Definition at line 29 of file Spinlock.h.

◆ PerProcessorScheduler

friend class PerProcessorScheduler

friend

Definition at line 28 of file Spinlock.h.

Member Data Documentation

◆ allow_recursion

const bool Spinlock::allow_recursion = true

static

Definition at line 54 of file Spinlock.h.

◆ m_bAvoidTracking

bool Spinlock::m_bAvoidTracking = false

private

Definition at line 94 of file Spinlock.h.

◆ m_bInterrupts

bool Spinlock::m_bInterrupts = false

private

Definition at line 81 of file Spinlock.h.

◆ m_Level

size_t Spinlock::m_Level = 0

private

Definition at line 91 of file Spinlock.h.

◆ m_Lock

SpinlockWord Spinlock::m_Lock

private

Definition at line 80 of file Spinlock.h.

◆ m_OwnedProcessor

size_t Spinlock::m_OwnedProcessor = ~0

private

Definition at line 92 of file Spinlock.h.

◆ m_pOwner

void* Spinlock::m_pOwner = nullptr

private

Definition at line 90 of file Spinlock.h.

The documentation for this class was generated from the following files:

Public Member Functions

Static Public Attributes

Private Member Functions

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

◆ Spinlock()

Member Function Documentation

◆ acquire()

◆ acquireContended()

◆ acquired()

◆ acquisitionAddress()

◆ badMagic()

◆ badReleaseInterrupts()

◆ deadlock()

◆ deferredReleaseWord()

◆ exit()

◆ interrupts()

◆ release()

◆ trackRelease()

◆ unlock()

◆ unlockForScheduler()

◆ unwind()

Friends And Related Symbol Documentation

◆ LocksCommand

◆ PerProcessorScheduler

Member Data Documentation

◆ allow_recursion

◆ m_bAvoidTracking

◆ m_bInterrupts

◆ m_Level

◆ m_Lock

◆ m_OwnedProcessor

◆ m_pOwner