Effects: pm->lock()
Postcondition: owns == true
Throws: Any exception thrown by pm->lock(). system_error if an exception is required ([thread.req.exception]). system_error with an error condition of operation_not_permitted if pm is 0. system_error with an error condition of resource_deadlock_would_occur if on entry owns is true.
Requires: The supplied Mutex shall meet the Lockable requirements ([thread.req.lockable.req]).
Effects: pm->try_lock()
Returns: The value returned by the call to try_lock().
Postcondition: owns == res, where res is the value returned by the call to try_lock().
Throws: Any exception thrown by pm->try_lock(). system_error if an exception is required ([thread.req.exception]). system_error with an error condition of operation_not_permitted if pm is 0. system_error with an error condition of resource_deadlock_would_occur if on entry owns is true.
template <class Clock, class Duration>
bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
Requires: The supplied Mutex type shall meet the TimedLockable requirements ([thread.req.lockable.timed]).
Effects: pm->try_lock_until(abs_time)
Returns: The value returned by the call to try_lock_until(abs_time).
Postcondition: owns == res, where res is the value returned by the call to try_lock_until(abs_time).
Throws: Any exception thrown by pm->try_lock_until(). system_error if an exception is required ([thread.req.exception]). system_error with an error condition of operation_not_permitted if pm is 0. system_error with an error condition of resource_deadlock_would_occur if on entry owns is true.
template <class Rep, class Period>
bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
Requires: The supplied Mutex type shall meet the TimedLockable requirements ([thread.req.lockable.timed]).
Effects: pm->try_lock_for(rel_time).
Returns: The value returned by the call to try_lock_until(rel_time).
Postcondition: owns == res, where res is the value returned by the call to try_lock_for(rel_time).
Throws: Any exception thrown by pm->try_lock_for(). system_error if an exception is required ([thread.req.exception]). system_error with an error condition of operation_not_permitted if pm is 0. system_error with an error condition of resource_deadlock_would_occur if on entry owns is true.
Effects: pm->unlock()
Postcondition: owns == false
Throws: system_error when an exception is required ([thread.req.exception]).