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Thread Pool


A thread pool is a software design pattern that helps programmers achieve concurrency in an optimal way. By maintaining a pool of threads ready to execute at any moment performance is increased since latency is minimized by keeping a set of threads always available; at the ready, instead of frequently starting them up and destroying them because of frequent brief tasks. Thus we avoid short lived threads which break concurrency.

All this because creating and destroying threads takes a longer time than keeping them constantly alive and waiting.

It stands to reason for me to want to make a thread pool to test my understanding of various modern C++ features and multithreading, as well as have it adorn various other projects that could certainly benefit from its features.

Design

  • there is an array of threads - m_pool
  • there is a FIFO queue of tasks (a Task should be a...

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Observer Design Pattern


Observer is a very important design pattern which is being used in almost every single self-respecting codebase as a way to efficienty communicate between objects in an event-based function. It wouldn't be an understatement to say it is the foundation of event based programming.

Underlying the popular, ever-present in networking, “Model View Controller” (MVC) design pattern, is the observer pattern.

Observers are used in every single game engine - they're known there mostly as “Event dispatchers”. This includes Unreal Engine.

The pattern promotes loose coupling since the Subjects don't need to know anything about the observers.

Alternative terminology for this pattern includes the following: - Subscribe-Publish - Listener-Publisher - Delegate-Model - Sink-Source, where the Subject is the source of events and the Observers are sinks of events

Design

  • a class,...

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