std::unique_lock::try_lock

bool try_lock();		(since C++11)

Tries to lock the associated mutex without blocking. Effectively calls mutex()->try_lock().

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

(none)

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

Any exceptions thrown by mutex()->try_lock() (Mutex types do not throw in try_lock, but a custom Lockable might)

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 by this std::unique_lock, std::system_error with an error code of std::errc::resource_deadlock_would_occur

lock	locks the associated mutex (public member function)
try_lock_for	attempts to lock the associated TimedLockable mutex, returns if the mutex has been unavailable for the specified time duration (public member function)
try_lock_until	tries to lock the associated TimedLockable mutex, returns if the mutex has been unavailable until specified time point has been reached (public member function)
unlock	unlocks the associated mutex (public member function)

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