Summary

In this chapter, we have covered the definitions of basic concepts related to OSs. You have learned about Linux’s main kernel structure and its expectations of software design. Real-time OSs were briefly introduced, and we covered the definitions of system calls, the system call interface, and POSIX as well. We’ve also laid the foundations of multiprocessing and multithreading. In the next chapter, we will discuss the process as the main resource user and manager. We will start with some C++20 code. Through this, you will learn about the Linux’s process memory layout, the OS’s process-scheduling mechanism, and how multiprocessing operates plus the challenges it brings. You will also learn some interesting facts about atomic operations.