How does mutex implement blocking when a lock is already acquired? ```scope.launch { mutex.with...

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[Jasjeet Singh]

How does mutex implement blocking when a lock is already acquired?

scope.launch { 
    mutex.withLock { ... } 
}

Here, does the mutex block the suspend the coroutine just like delay() (such that it doesn't block a thread's execution but just the coroutine) or a total thread block making essentially all coroutines (scheduled on that thread) blocked as well?

[ephemient]

the coroutine is suspended until it is runnable again (e.g. when the lock is released elsewhere), it does not block the thread

[ephemient]

https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.sync/-mutex/lock.html

Locks this mutex, suspending caller until the lock is acquired

[Jasjeet Singh]

@ephemient Oh I see, thanks for clarifying!