Class template monitor_unique_lock
poet::monitor_unique_lock — unique_lock with monitor object access
Synopsis
template<typename MonitorType> class monitor_unique_lock { public: // types typedef MonitorType monitor_type; typedef MonitorType::element_type element_type; // will additionally be const-qualified if MonitorType is "const monitor<T>" // construct/copy/destruct explicit monitor_unique_lock(MonitorType &); template<typename T> monitor_unique_lock(MonitorType &, const T &); monitor_unique_lock(boost::detail::thread_move_t<monitor_unique_lock>); monitor_unique_lock(boost::detail::thread_move_t<monitor_upgrade_lock<MonitorType> >); monitor_unique_lock(); ~monitor_unique_lock(); // public boost::unique_lock interface void lock(); boost::detail::thread_move_t<monitor_unique_lock> move(); MonitorType * mutex() const; monitor_unique_lock & operator=(boost::detail::thread_move_t<monitor_unique_lock>); monitor_unique_lock & operator=(boost::detail::thread_move_t<monitor_upgrade_lock>); bool operator!() const; operator boost::detail::thread_move_t<monitor_unique_lock>(); operator unspecified_bool_type() const; bool owns_lock() const; MonitorType * release(); void swap(monitor_unique_lock &); template<typename Timeout> bool timed_lock(const Timeout &); bool try_lock(); void unlock(); // public member functions element_type * operator->() const; element_type & operator*() const; private: // construct/copy/destruct monitor_unique_lock(monitor_unique_lock &); monitor_unique_lock& operator=(monitor_unique_lock &); }; // free functions template<typename Monitor> boost::detail::thread_move_t<monitor_unique_lock<Monitor> > move(monitor_unique_lock<Monitor> &); template<typename Monitor> void swap(monitor_unique_lock<Monitor> &, monitor_unique_lock<Monitor> &);
Description
monitor_unique_lock
is an extension of boost::unique_lock
from the
Boost.Thread
library. It extends the interface of
boost::unique_lock by adding operator->
and operator* methods, which permit access to
the object protected by the lock's associated monitor. This tight
coupling of locking with access helps insure
the monitor's mutex is always locked when the object it is protecting
is accessed.
The MonitorType
template type parameter may be one of the monitor
or monitor_ptr types.
See the documentation of boost::unique_lock in the Boost.Thread library for more information about the unique_lock interface.
monitor_unique_lock
public construct/copy/destruct
-
explicit monitor_unique_lock(MonitorType & mon);
Calls lock(), acquiring exclusive ownership of
mon
(in the sense of a lock having ownership of a mutex).Internally, the monitor_unique_lock stores a
monitor_ptr
to use as a reference to the object protected by themon
argument. Thus the monitor_unique_lock shares ownership (in theshared_ptr
sense) and may safely outlive themon
object. -
template<typename T> monitor_unique_lock(MonitorType & mon, const T & arg);
This constructor corresponds to all the 2 argument constructors of boost::unique_lock. The second argument may thus be of type
boost::adopt_lock_t
,boost::defer_lock_t
,boost::try_to_lock_t
, orboost::system_time
. -
monitor_unique_lock(boost::detail::thread_move_t<monitor_unique_lock> other);
Move constructor.
-
monitor_unique_lock(boost::detail::thread_move_t<monitor_upgrade_lock<MonitorType> > other);
Move constructor. The upgrade_lock is upgraded to a unique_lock as it is moved into
*this
. -
monitor_unique_lock();
The default constructor creates an empty lock that is not associated with any monitor object. The empty lock can only be made useful by moving another another lock into it.
-
~monitor_unique_lock();
If
owns_lock()
, callsunlock()
.
monitor_unique_lock
public boost::unique_lock interface
-
void lock();
-
boost::detail::thread_move_t<monitor_unique_lock> move();
-
MonitorType * mutex() const;
-
monitor_unique_lock & operator=(boost::detail::thread_move_t<monitor_unique_lock>);
-
monitor_unique_lock & operator=(boost::detail::thread_move_t<monitor_upgrade_lock>);
-
bool operator!() const;
-
operator boost::detail::thread_move_t<monitor_unique_lock>();
-
operator unspecified_bool_type() const;
-
bool owns_lock() const;
-
MonitorType * release();
-
void swap(monitor_unique_lock & other);
-
template<typename Timeout> bool timed_lock(const Timeout & t);
-
bool try_lock();
-
void unlock();
monitor_unique_lock
public member functions
-
element_type * operator->() const;
Provides access to the members of the object protected by the lock's associated monitor.
Throws:
boost::lock_error if
owns_lock() != true
. -
element_type & operator*() const;
Provides access to the object protected by the lock's associated monitor.
Throws:
boost::lock_error if
owns_lock() != true
.
monitor_unique_lock
free functions
-
template<typename Monitor> boost::detail::thread_move_t<monitor_unique_lock<Monitor> > move(monitor_unique_lock<Monitor> & lock);
Returns:
lock.move()
-
template<typename Monitor> void swap(monitor_unique_lock<Monitor> & lock_a, monitor_unique_lock<Monitor> & lock_b);
Effects:
lock_a.swap(lock_b)