Is it possible to obtain a

CoroutineContext

from

Thread.currentThread()

? I don't control the current thread instance, but I want to specifically switch to it using e.g.

withContext(/*..*/) {}

.

I guess you could make a CoroutineDispatcher that dispatches to this thread.

Maybe I can use

fun <T> ThreadLocal<T>.asContextElement(value: T = get()): ThreadContextElement<T>

instead

I'm not sure. In order to "switch" a coroutine to another thread, you'll have to dispatch

Because I'm trying to work with a thread-confined class on the IO dispatcher. I think that when a coroutine suspends on that dispatcher, when it later resumes there is no guarantee that it will resume on the same thread

Yea,

<http://Dispatchers.IO|Dispatchers.IO>

has multiple threads

I'm also still considering just using a single threaded context for simplicity, there might be other concurrency issues with multiple threads, even if I manage to constrain coroutine access to just 1 thread in the IO dispatcher

You'll need to create your dispatcher with only one thread and touch your class only from this thread. Maybe something like:

Executors.newSingleThreadExecutor().asCoroutineDispatcher()

Also, my idea likely breaks some efficiency measures of the IO dispatcher