Modern Embedded Systems Programming Course - #44 Active Objects in Real-Time Part-2: Mutable Events

This lesson continues the subject of Active Objects for Real-Time. Specifically, today you'll see how the use of asynchronous, *mutable* events makes Active Objects even more suitable for hard real-time than traditional with a Real-Time Operating System (RTOS). Contents with Timestamps: ------------------------- 1:40 Adding interactions among Active Objects, first with *sharing* 4:30 Race condition caused by sharing 6:05 Observing consequences of the race condition 8:00 Applying mutual exclusion for protection 9:20 Timing problems caused by mutual exclusion 10:40 Switching over to interactions via *events* 12:00 Naive approach with the static mutable event with parameters 13:30 Receiving event with parameters 15:50 Why static mutable events aren't safe? 16:45 Framework-based, management of mutable events 18:50 Summary of "Zero-copy" event management 19:32 "The Law of Leaky Abstractions" 19:50 Ownership rules for mutable events ------- Resources: Companion web page for this video course: https://www.state-machine.com/quickstart GitHub repository for projects for this video course: https://github.com/QuantumLeaps/modern-embedded-programming-course Transcript of this lesson: https://www.state-machine.com/course/lesson44.txt Recommended Reading: Book: "Practical UML Statecharts in C/C++, 2nd Edition": https://www.state-machine.com/doc/PSiCC2.pdf Article: "The Law of Leaky Abstractions" by Joel Spolsky https://www.joelonsoftware.com/2002/11/11/the-law-of-leaky-abstractions Music credits: The background music comes from: https://www.bensound.com/royalty-free-music/track/straight