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.

Contents 1 Parameters 2 Return value 3 Exceptions 4 Example 5 See also

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)