std::shared_lock<Mutex>:: try_lock

bool try_lock ( ) ;		(since C++14)

Tries to lock the associated mutex in shared mode without blocking. Effectively calls mutex ( ) - > try_lock_shared ( ) .

std::system_error is thrown if there is no associated mutex or if the mutex is already locked.

Parameters

(none)

Return value

true if the ownership of the mutex has been acquired successfully, false otherwise.

Exceptions

• Any exceptions thrown by mutex ( ) - > try_lock_shared ( ) .

• If there is no associated mutex, std::system_error with an error code of std::errc::operation_not_permitted .

• If the mutex is already locked, std::system_error with an error code of std::errc::resource_deadlock_would_occur .

Example

This section is incomplete Reason: no example

See also

lock	locks the associated mutex (public member function)
try_lock	tries to lock (i.e., takes ownership of) the associated mutex without blocking (public member function of std::unique_lock<Mutex> )
try_lock_for	tries to lock the associated mutex, for the specified duration (public member function)
try_lock_until	tries to lock the associated mutex, until a specified time point (public member function)
unlock	unlocks the associated mutex (public member function)