What is a semaphore? How do they work? (Example in C)

What is a semaphore? How do they work? (Example in C) // Semaphores cause a lot of confusion for students, largely because they are super flexible and a little weird. In this video, I try to provide some insight into how they work, and an example of where you could use semaphores to coordinate different processes.

Shared Memory Videos:
https://youtu.be/WgVSq-sgHOc
https://www.youtube.com/watch?v=rPV6b8BUwxM

Threads and Processes:
https://www.youtube.com/playlist?list=PL9IEJIKnBJjFZxuqyJ9JqVYmuFZHr7CFM
https://www.youtube.com/playlist?list=PL9IEJIKnBJjFNNfpY6fHjVzAwtgRYjhPw

Welcome to my channel. I post videos that help you learn to program and become a more confident software developer. I cover beginner-to-advanced systems topics ranging from network programming, threads, processes, operating systems, embedded systems and others. My goal is to help you get under-the-hood and better understand how computers work and how you can use them to become stronger students and more capable professional developers.

About me: I'm a computer scientist, electrical engineer, researcher, and teacher. I specialize in embedded systems, mobile computing, sensor networks, and the Internet of Things. I teach systems and networking courses at Clemson University, where I also lead the PERSIST research lab.

More about me and what I do:
https://www.jacobsorber.com
https://people.cs.clemson.edu/~jsorber/
http://persist.cs.clemson.edu/

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Source code is also available to Patreon supporters. --- [https://jsorber-youtube-source.herokuapp.com/]
Note: I haven't posted ALL of the code from ALL of my videos yet. The site contains code from my recent tutorials (I wasn't quite as organized in the pre-2019 past). I will add examples from older videos as I dig them up.

Видео What is a semaphore? How do they work? (Example in C) канала Jacob Sorber