Providing a stable memory address

by Jens Weller

Some APIs allow you to store a pointer to your data element. This is used to access additional information from your types to display them in Model/View Architecture.

A while ago I showed how you can implement a tree with shared_ptr and enable_shared_from_this and then display this in QTreeView. And when working on my current project I knew this problem would come around again. Maybe not for a tree and a tree view, but I'll clearly need to have some way to have ui panels display and edit my data classes and store a stable memory adress as a pointer in Qt models. Back in 2015 the Qt5 example still used a pointer allocated with raw new for this, in Qt6 the example uses unique_ptr. Using shared_ptr for this back in 2015 was a good decision, and the code works very well. For the moment I don't see that my current project would need to make use of enable_shared_from_this, so using unique_ptr would be a good option...

SObjectizer Tales – 23. Mutable messages

by Marco Arena

In this episode we explore mutable messages, a feature enabling us to exchange messages that can be modified by the receiver.

SObjectizer Tales – 22. Performance, part 3

by Marco Arena

In this episode we conclude our exploration of performance considerations within the actor model, with a specific focus on typical benchmarks.

SObjectizer Tales – 21. Performance, part 2

by Marco Arena

In this episode we continue our exploration of performance considerations within the actor model, with a specific focus on measuring service time.

SObjectizer Tales – 20. Performance, part 1

by Marco Arena

In this episode we embark on a three-part full-immersion on performance metrics and considerations in message-passing styled applications, with a specific emphasis on SObjectizer and the in-process actor model.

SObjectizer Tales – 19. Thread-safe handlers

by Marco Arena

In this episode we explore thread-safe message handlers and revisit the problem of distributing work across multiple threads.

SObjectizer Tales – 18. Limiting message chains

by Marco Arena

In this episode we explore limited message chains as an alternative way to regulating message flow.

SObjectizer Tales – 17. Limiting message flow

by Marco Arena

In this episode we implement strategies within agents to effectively control and manage message flow.

SObjectizer Tales - 16. Interrupting work

by Marco Arena

In this episode we explore approaches to interrupt pending work during the shutdown process.

SObjectizer Tales – 15. Monitoring disconnections

by Marco Arena

In this episode we incorporate an automatic mechanism to detect client disconnections.