std::try_lock

 

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Defined in header <mutex>
template< class Lockable1, class Lockable2, class LockableN... > int try_lock( Lockable1& lock1, Lockable2& lock2, LockableN& lockn... );		(since C++11)

Tries to lock each of the given lockable objects lock1, lock2, ..., lockn by calling try_lock() in order beginning at the first. If a call to try_lock() fails, unlock() is called for any locked objects and a ​0​-based index of the object that failed to lock, is returned.

If a call to try_lock() results in an exception, unlock() is called for any locked objects before rethrowing.

Parameters

lock1, lock2, ... , lockn

-

the lockable objects to lock

Return value

-1 on success or ​0​-based index value of the object that failed to lock.

See also

lock (C++11)	locks specified mutexes/locks, blocks if at least one is unavailable (function template)