From the course: Parallel and Concurrent Programming with C++ Part 2
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Barrier: C++ demo - C++ Tutorial
From the course: Parallel and Concurrent Programming with C++ Part 2
Barrier: C++ demo
- [Instructor] At the time of this recording, in early 2020, barriers were an experimental part of the C++ standard. Though it looks like they expected to be included as part of the official C++ 20 standard. But, until that happens, and it gets implemented in common compiler libraries, we can turn to the well-known Boost collection of open source C++ libraries, which conveniently does have a barrier we can use. To demonstrate using a barrier in C++, we'll build on the previous example that demonstrated a race condition by creating 10 shopper threads named Olivia and Barron that either added or multiplied the number of chips to buy. Without a barrier in place, this program has a race condition that produces a different final result each time we run it. So, let's use a barrier to make sure all five of the Olivia shopper threads execute their add operation before the five Barron shoppers multiply the bags of chips. First…
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