November 1999
Intermediate to advanced
336 pages
6h 29m
English
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Reader/Writer Locks
Another way to ease the pain of synchronization is to relax the requirement that one and only one thread may have exclusive access to shared data. The need to serialize access to shared data stems from the fact that the shared data may be modified by one of the threads accessing it. It follows that we must give exclusive access only to those threads aiming to modify shared data (writers). Conversely, threads that are merely interested in reading shared data (readers) could access shared data concurrently.
Reader/writer locks are those that allow multiple readers to access shared data instead of waiting for exclusive access. A thread trying to get read access to shared data will be granted read access in one of two cases:
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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.