QList<*QObject> property thread safety

poncho524

if one thread is updating a QList<*QObjects> and the qml thread is using this as a ListView model, how can thread safety be guarenteed?

sierdzio

They work on separate copies of the list.

jeremy_k

@poncho524 said in QList<*QObject> property thread safety:

if one thread is updating a QList<*QObjects> and the qml thread is using this as a ListView model, how can thread safety be guarenteed?

There's a multithreading list model example that covers updating a ListModel outside of the gui thread.

The Qt containers are documented as thread-safe only if the container is read-only. Otherwise, mutual exclusion is necessary to protect accesses.

QObject also isn't thread safe. If they are allocated in a worker thread, don't forget to QObject::moveToThread() before the gui thread has an opportunity for access. Once that is done, the worker thread can't safely access the object.