April 2012
Intermediate to advanced
352 pages
8h
English
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Conclusion
This chapter described the entire code base of nmdm(4), the virtual null modem terminal driver. If you noticed the complete lack of locking in this driver and are alarmed, don’t be. The ns_mtx mutex, which gets initialized in nmdm_alloc, is implicitly acquired by the TTY subsystem before nmdm_outwakeup, nmdm_inwakeup, nmdm_modem, and nmdm_param are called. In short, every operation between nmdm%luA and nmdm%luB is serialized.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.