This includes checking if a thread can be given up for a switch, giving up the thread, assuming control of a thread, and running tasks on the assumed thread.Īn executor is an abstraction in concurrent programming that manages the execution of tasks, such as functions or closures, on a set of resources, typically threads. Actor switching: Functions are provided for handling switching between different executors in the context of actors.Actor scheduling: Functions for actor scheduling are implemented, which handle the execution of tasks on actors, including enqueueing tasks on an actor’s queue, processing tasks from the queue, and running tasks in the appropriate context.Task management: Functions for managing tasks are implemented, such as creating new tasks, resuming suspended tasks, and enqueuing tasks on executors.These functions include checking if an executor is compatible with a task and determining if an executor can give up its thread for a task. Executor handling: Functions are implemented to handle interactions with executors, which are responsible for running tasks on different threads.

Actor definition: The Actor class and related structures are defined, along with the DefaultActor and MainActor classes, which are the basic actor types provided by the system.Actors are a synchronization mechanism that helps manage shared mutable state, ensuring that only one task can access the actor’s state at a time. This article is a deep dive into the Swift’s implementation of actor-based concurrency based on the source code. Overview of the Apple’s Actor implementation

Swift downcast initializer