CppCon 2024

Writing correct and high-performing IPC (Intra-Process Communication) programs in a constrained environment provides significant challenges. Properly utilizing function interfaces, data types, and ensuring correct data flow are part of the challenge during programming of IPC applications. Furthermore, debugging run-time bugs coming from IPC are some of the hardest and most time-consuming bugs.

We leverage the power of C++20 and concepts to define modern interfaces and constraints, that make IPC programs easy to understand. We introduce a pattern called CCI (Concept, Constraint, and Implementation) to facilitate the creation of modern interfaces encapsulating low-level IPC functions. Therefore, we mitigate numerous pitfalls stemming from IPC programming and prevent run-time bugs.

After explaining CCI and getting a good grounding, we start the re-work of low-level code around CCI. We show how features of C++20 help us utilize CCI. After that, we provide the general assessment of CCI pattern and compare the output of the assembly code regarding the performance.