🗒️ Practical Swift Concurrency Chapter 2

Here are the notes that I have from today's reading

DispatchQueue

• Used to run tasks serially or parallel and if we need to wait for the work to complete or not
• DispatchQueue.main is used to run the main thread
• DispatchQueue.global is used to perform work in parallel and things that shouldn't block the UI

DispatchGroup

• Only track the number of tasks to do and the number of times work has completed
• A group increments tasks to do when entered and increments the completed work when left
• Allows us to wait for things to complete before using it

Semaphores and Locks

• Semaphore - keeps track of how much of a give resource is available. Will force code to wait for resources to be available before running