Summary
In this chapter, we explored common C++ solutions to the problems of developing concurrent software. This is a very different type of problem compared to everything we studied before. Our main concerns here are correctness, specifically, by avoiding data races, and performance. Synchronization patterns are standard ways to control access to shared data to avoid undefined behavior. Execution patterns are the basic building blocks of thread schedulers and asynchronous executors. Finally, the high-level patterns and guidelines for the concurrent design are the ways we, the programmers, keep our sanity while trying to think about all the things that could happen before, after, or at the same time as one another.
