July 2018
Intermediate to advanced
266 pages
7h 11m
English
Content preview from Learning Concurrency in Kotlin
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Recap
This is a good time to recap how thread switching works. Now that we have all the parts explained, we can just put it in a few sentences.
The initial Continuation gets wrapped into a DispatchedContinuation; this is still a Continuation, but can dispatch using a CoroutineDispatcher if needed—which should be the case, except for Unconfined. The CoroutineDispatcher will use whichever executor fits its requirements, sending it a DispatchedTask, which is a Runnable that sets the correct context using withCoroutineContext() and invokes the resume() and resumeWithException() functions from the DispatchedContinuation.
So, the actual work of changing the thread happens in the CoroutineDispatcher, but is only possible thanks to the whole pipeline ...
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