Concurrent execution patterns

The next group of patterns for concurrency we must learn are execution patterns. These patterns are used to organize the computations done on multiple threads. You will find out that, just as with the synchronization patterns we saw earlier, all of these are low-level patterns: most solutions for practical problems must combine these patterns into larger, more complex, designs. This is not because C++ is ill-suited for such larger designs; if anything, it is the opposite: there are so many ways to implement, for example, a thread pool, in C++, that for every concrete application, there is a version that is ideally suited in terms of performance and features. This is why it is hard to describe these more complete solutions as patterns: while the problems they address are common, the solutions vary a great deal. But all of these designs have a number of challenges to resolve, and the solutions to those challenges usually use the same tools over and over...