class GradSoft::RWLock

Read/Write lock allow multiple readers/single writer.

Public Methods

RWLock() throw(ThreadingExceptions::NoResources, ThreadingExceptions::InternalError)

constructor.

virtual ~RWLock() throw(ThreadingExceptions::ResourceBusy, ThreadingExceptions::InternalError)

destructor

void read_lock() const throw(ThreadingExceptions::NoResources, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

obtaine read lock.

bool try_read_lock() const throw(ThreadingExceptions::NoResources, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

try to obtain read lock.

void read_unlock() const throw(ThreadingExceptions::NoPermission, ThreadingExceptions::InternalError)

unlock read lock.

void write_lock() throw(ThreadingExceptions::NoMemory, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

obtaine write lock.

bool try_write_lock() throw(ThreadingExceptions::NoMemory, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

try to obtain write lock.

void write_unlock() const throw(ThreadingExceptions::NoPermission, ThreadingExceptions::InternalError)

unlock write lock.

Documentation

Read/Write lock allow multiple readers/single writer. access to object with such lock must be sequence of atomic read-only or write-only operations.

(i. e. rwlock.read_lock(), rwlock.write_lock() is the fastest way to deadlock state.

RWLock() throw(ThreadingExceptions::NoResources, ThreadingExceptions::InternalError)

constructor. Create rwlock in ulocked state.

virtual ~RWLock() throw(ThreadingExceptions::ResourceBusy, ThreadingExceptions::InternalError)

destructor

void read_lock() const throw(ThreadingExceptions::NoResources, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

obtaine read lock. If now rwlock is write-locked, than wait until lock will be obtained.

bool try_read_lock() const throw(ThreadingExceptions::NoResources, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

try to obtain read lock.

Returns:

s true, if lock obtained, false otherwise.

void read_unlock() const throw(ThreadingExceptions::NoPermission, ThreadingExceptions::InternalError)

unlock read lock. (safe, only if lock was previously read-locked).

void write_lock() throw(ThreadingExceptions::NoMemory, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

obtaine write lock. If now rwlock is locked, than wait until lock will be obtained.

bool try_write_lock() throw(ThreadingExceptions::NoMemory, ThreadingExceptions::PossibleDeadlock, ThreadingExceptions::InternalError)

try to obtain write lock.

Returns:

s true, if lock obtained, false otherwise.

void write_unlock() const throw(ThreadingExceptions::NoPermission, ThreadingExceptions::InternalError)

unlock write lock. (safe, only if lock was previously write-locked).

This class has no child classes.

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