coroutines is no longer actively maintained by VMware, Inc.

Coroutines

Introduction

Provides coroutines for JavaScript. This heavily relies on the monadic package, and the routines themselves must be written to use a specific monad provided.

You should really just read the test example.

Each coroutine gets a Process ID (pid), can spawn new processes, can yield, can kill other processes. You could easily extend this to actors/message-passing too by imbuing each process with a mailbox.