Is QSharedPointer thread-safe?

QSharedPointer is partially thread-safe, partially reentrant.

Is QImage thread-safe?

Qt uses an optimization called implicit sharing for many of its value class, notably QImage and QString. Beginning with Qt 4, implicit shared classes can safely be copied across threads, like any other value classes. They are fully reentrant. Note that atomic reference counting does not guarantee thread-safety.

Is Unique_ptr thread-safe?

unique_ptr is thread safe when used correctly. You broke the unwritten rule: Thou shalt never pass unique_ptr between threads by reference. The philosophy behind unique_ptr is that it has a single (unique) owner at all times.

Is shared_ptr copy thread-safe?

The update of the std::shared_ptr ptr (1) is thread-safe.

Can a qsharedpointer be created from a pointer?

A QSharedPointer object can be created from a normal pointer, another QSharedPointer object or by promoting a QWeakPointer object to a strong reference. QSharedPointer and QWeakPointer are reentrant classes.

What happens when a qsharedpointer goes out of scope?

QSharedPointer will delete the pointer it is holding when it goes out of scope, provided no other QSharedPointer objects are referencing it. A QSharedPointer object can be created from a normal pointer, another QSharedPointer object or by promoting a QWeakPointer object to a strong reference.

Are there any pointer wrapper classes in Qt?

Qt also provides two other pointer wrapper classes: QPointer and QSharedDataPointer. They are incompatible with one another, since each has its very different use case. QSharedPointer holds a shared pointer by means of an external reference count (i.e., a reference counter placed outside the object).

Which is Qt class holds a strong reference to a shared pointer?

QSharedPointer is a Qt class which holds a strong reference to a shared pointer. Learn more… I have an application with multiple “input widgets” written as inpependent classes, that all store a shared pointer of the respective class that’s data thay show. In each of these widgets a user can