RCUInfos Class Reference

#include <rcu.h>

Collaboration diagram for RCUInfos:

Classes
class	RCUCleanupGuard

Private Member Functions
	RCUInfos ()
	~RCUInfos ()
void	readLock ()
void	readFree ()
bool	isLocked () const
void	registerCleanup (const std::function< void()> &f)
void	synchronize ()
void	runCleanups ()
uint64_t	hasSyncedTo (uint64_t cutoff=UNLOCKED)

Private Attributes
std::atomic< uint64_t >	state
std::atomic< RCUInfos * >	next
bool	isCleaningUp = false
std::map< uint64_t, std::function< void()> >	cleanups

Static Private Attributes
static const uint64_t	UNLOCKED = -uint64_t(1)
static std::atomic< uint64_t >	revision {0}
static thread_local RCUInfos	infos {}

Friends
class	RCULock
struct	RCUTest

Detailed Description

Definition at line 20 of file rcu.h.

Constructor & Destructor Documentation

RCUInfos()

RCUInfos::RCUInfos ( )

private

Definition at line 107 of file rcu.cpp.

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~RCUInfos()

RCUInfos::~RCUInfos ( )

private

Before the thread is removed from the list, make sure we cleanup everything.

We have our node and the parent is ready to be updated. NB: The CAS operation only checks for *ptr and not for next. This would be a big problem in the general case, but because we only insert at the tip of the list and cannot have concurrent deletion thanks to the use of a mutex, we are safe.

We now wait for possible readers to go past the synchronization point. We need to do so while holding the lock as this operation require us to a be a reader, but we just removed ourselves from the list of reader to check and may therefore not be waited for.

Definition at line 117 of file rcu.cpp.

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Member Function Documentation

hasSyncedTo()

uint64_t RCUInfos::hasSyncedTo ( uint64_t  cutoff = UNLOCKED )

private

Definition at line 235 of file rcu.cpp.

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isLocked()

bool RCUInfos::isLocked ( ) const

inlineprivate

Definition at line 45 of file rcu.h.

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readFree()

void RCUInfos::readFree ( )

inlineprivate

Definition at line 40 of file rcu.h.

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readLock()

void RCUInfos::readLock ( )

inlineprivate

Definition at line 35 of file rcu.h.

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registerCleanup()

void RCUInfos::registerCleanup ( const std::function< void()> &  f )

inlineprivate

Definition at line 46 of file rcu.h.

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runCleanups()

void RCUInfos::runCleanups ( )

private

Definition at line 208 of file rcu.cpp.

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synchronize()

void RCUInfos::synchronize ( )

private

Definition at line 169 of file rcu.cpp.

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Friends And Related Symbol Documentation

RCULock

friend class RCULock

friend

Definition at line 54 of file rcu.h.

RCUTest

friend struct RCUTest

friend

Definition at line 55 of file rcu.h.

Member Data Documentation

cleanups

std::map<uint64_t, std::function<void()> > RCUInfos::cleanups

private

Definition at line 27 of file rcu.h.

infos

thread_local RCUInfos RCUInfos::infos {}

staticprivate

Definition at line 14 of file rcu.h.

isCleaningUp

bool RCUInfos::isCleaningUp = false

private

Definition at line 24 of file rcu.h.

next

std::atomic<RCUInfos *> RCUInfos::next

private

Definition at line 22 of file rcu.h.

revision

std::atomic< uint64_t > RCUInfos::revision {0}

staticprivate

Definition at line 13 of file rcu.h.

state

std::atomic<uint64_t> RCUInfos::state

private

Definition at line 21 of file rcu.h.

UNLOCKED

const uint64_t RCUInfos::UNLOCKED = -uint64_t(1)

staticprivate

Definition at line 30 of file rcu.h.

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

• src/rcu.h
• src/rcu.cpp