ReadersWritersLock Class Reference

#include <ReadersWritersLock.H>

List of all members.

Public Member Functions
	ReadersWritersLock (bool favorWriters) throw ()
	~ReadersWritersLock () throw ()
void	acquireRead () throw ()
void	releaseRead () throw ()
void	acquireWrite () throw ()
void	releaseWrite () throw ()
bool	tryRead () throw ()
bool	tryWrite () throw ()
bool	release () throw ()
Private Attributes
Basics::mutex	mu
int	readers
int	writers
RWLock_Queue_Item *	q_head
RWLock_Queue_Item *	q_tail
time_t	acquire_time
pthread_t	acquire_thread

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Constructor & Destructor Documentation

ReadersWritersLock::ReadersWritersLock (  bool  favorWriters  )  throw ()

Definition at line 143 of file ReadersWritersLock.C.

ReadersWritersLock::~ReadersWritersLock (   )  throw ()

Definition at line 94 of file ReadersWritersLock.C. References acquireWrite(), Basics::mutex::lock(), mu, q_head, releaseWrite(), and Basics::mutex::unlock().

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Member Function Documentation

void ReadersWritersLock::acquireRead (   )  throw ()

Definition at line 170 of file ReadersWritersLock.C. References acquire_thread, acquire_time, Basics::mutex::lock(), mu, RWLock_Queue_Item::my_turn, NEW_CONSTR, RWLock_Queue_Item::next, RWLock_Queue_Item::prev, q_head, q_tail, readers, RWLOCK_ACQUIRE_READ_DONE, RWLOCK_ACQUIRE_READ_START, Basics::mutex::unlock(), Basics::cond::wait(), RWLock_Queue_Item::waiting_count, RWLock_Queue_Item::writer, and writers. Referenced by AccessControl::admit(), VDirVolatileRoot::createVolatileDirectory(), do_rename(), AccessControl::UnixIdentityRep::fill_caches(), AccessControl::GlobalIdentityRep::fill_caches(), GardenerThread(), AccessControl::globalToUnixGroup(), AccessControl::globalToUnixUser(), VDirVolatileRoot::lookupIndexAndLock(), AccessControl::unixToGlobalGroup(), and AccessControl::unixToGlobalUser().

void ReadersWritersLock::acquireWrite (   )  throw ()

Definition at line 319 of file ReadersWritersLock.C. References acquire_thread, acquire_time, Basics::mutex::lock(), mu, RWLock_Queue_Item::my_turn, RWLock_Queue_Item::next, RWLock_Queue_Item::prev, q_head, q_tail, readers, RWLOCK_ACQUIRE_WRITE_DONE, RWLOCK_ACQUIRE_WRITE_START, Basics::mutex::unlock(), Basics::cond::wait(), and writers. Referenced by AcquireShortIdBlock(), AccessControl::admit(), CheckpointServer(), VDirVolatileRoot::createVolatileDirectory(), VDirVolatileRoot::deleteIndex(), DoDeletions(), GardenerThread(), LandlordThread(), VDirVolatileRoot::lockAll(), VDirVolatileRoot::lookupIndexAndLock(), ReleaseShortIdBlock(), RenewShortIdBlock(), SourceWeed(), VSAtomic(), and ~ReadersWritersLock().

bool ReadersWritersLock::release (   )  throw ()

Definition at line 487 of file ReadersWritersLock.C. References acquire_thread, acquire_time, Basics::cond::broadcast(), Basics::mutex::lock(), mu, RWLock_Queue_Item::my_turn, q_head, readers, RWLOCK_RELEASE_DONE, RWLOCK_RELEASE_START, Basics::mutex::unlock(), RWLock_Queue_Item::writer, and writers. Referenced by do_hardlink(), Replicate(), ReplicateAttribs(), and ReplicationCleanup().

void ReadersWritersLock::releaseRead (   )  throw ()

Definition at line 275 of file ReadersWritersLock.C. References acquire_thread, acquire_time, Basics::cond::broadcast(), Basics::mutex::lock(), mu, RWLock_Queue_Item::my_turn, q_head, readers, RWLOCK_RELEASE_DONE, RWLOCK_RELEASE_START, and Basics::mutex::unlock(). Referenced by AccessControl::admit(), do_cow(), do_readlink(), do_rename(), AccessControl::UnixIdentityRep::fill_caches(), AccessControl::GlobalIdentityRep::fill_caches(), GardenerThread(), AccessControl::globalToUnixGroup(), AccessControl::globalToUnixUser(), AccessControl::unixToGlobalGroup(), AccessControl::unixToGlobalUser(), VSRead(), and VSStat().

void ReadersWritersLock::releaseWrite (   )  throw ()

Definition at line 392 of file ReadersWritersLock.C. References acquire_thread, acquire_time, Basics::cond::broadcast(), Basics::mutex::lock(), mu, RWLock_Queue_Item::my_turn, q_head, RWLOCK_RELEASE_DONE, RWLOCK_RELEASE_START, Basics::mutex::unlock(), and writers. Referenced by AcquireMastership(), AcquireShortIdBlock(), AccessControl::admit(), CheckpointServer(), VDirVolatileRoot::createVolatileDirectory(), VDirVolatileRoot::deleteIndex(), do_hardlink(), do_mkdir(), do_remove(), do_rename(), do_setattr(), GardenerThread(), LandlordThread(), MakeFilesImmutable(), MutableSidrefCheck(), ReleaseShortIdBlock(), RenewShortIdBlock(), SetIndexMaster(), SourceWeed(), VDirVolatileRoot::unlockAll(), VSAtomic(), VSSetExecutable(), VSSetSize(), VSSetTimestamp(), VSWrite(), and ~ReadersWritersLock().

bool ReadersWritersLock::tryRead (   )  throw ()

Definition at line 425 of file ReadersWritersLock.C. References acquire_thread, acquire_time, Basics::mutex::lock(), mu, q_head, readers, RWLOCK_ACQUIRE_READ_DONE, RWLOCK_ACQUIRE_READ_START, Basics::mutex::unlock(), and writers.

bool ReadersWritersLock::tryWrite (   )  throw ()

Definition at line 458 of file ReadersWritersLock.C. References acquire_thread, acquire_time, Basics::mutex::lock(), mu, q_head, readers, RWLOCK_ACQUIRE_WRITE_DONE, RWLOCK_ACQUIRE_WRITE_START, Basics::mutex::unlock(), and writers. Referenced by GardenerThread().

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Member Data Documentation

pthread_t ReadersWritersLock::acquire_thread [private]

Definition at line 85 of file ReadersWritersLock.H. Referenced by acquireRead(), acquireWrite(), release(), releaseRead(), releaseWrite(), tryRead(), and tryWrite().

time_t ReadersWritersLock::acquire_time [private]

Definition at line 84 of file ReadersWritersLock.H. Referenced by acquireRead(), acquireWrite(), release(), releaseRead(), releaseWrite(), tryRead(), and tryWrite().

Basics::mutex ReadersWritersLock::mu [private]

Definition at line 70 of file ReadersWritersLock.H. Referenced by acquireRead(), acquireWrite(), release(), releaseRead(), releaseWrite(), tryRead(), tryWrite(), and ~ReadersWritersLock().

RWLock_Queue_Item* ReadersWritersLock::q_head [private]

Definition at line 77 of file ReadersWritersLock.H. Referenced by acquireRead(), acquireWrite(), release(), releaseRead(), releaseWrite(), tryRead(), tryWrite(), and ~ReadersWritersLock().

RWLock_Queue_Item * ReadersWritersLock::q_tail [private]

Definition at line 77 of file ReadersWritersLock.H. Referenced by acquireRead(), and acquireWrite().

int ReadersWritersLock::readers [private]

Definition at line 74 of file ReadersWritersLock.H. Referenced by acquireRead(), acquireWrite(), release(), releaseRead(), tryRead(), and tryWrite().

int ReadersWritersLock::writers [private]

Definition at line 75 of file ReadersWritersLock.H. Referenced by acquireRead(), acquireWrite(), release(), releaseWrite(), tryRead(), and tryWrite().

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

• /vesta/vestasys.org/vesta/repos/74/src/ReadersWritersLock.H
• /vesta/vestasys.org/vesta/repos/74/src/ReadersWritersLock.C

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