Hello, could someone tell me what is the difference between these two ways of synchronization and why would I use one over the other? I noticed it's impossible to call suspending functions inside a synchronized block but it's fine with the other way, why is that?

They aren't the same, the first locks by calling

lock()

and

unlock()

on

lock

. The second holds a monitor on the

lock

object.

So what is the functional difference? Both seem to achieve the same thing?

same functionality. From documentation:

Memory semantic of the Mutex is similar to synchronized block on JVM

Thank you. But then why suspending function cannot be called inside a synchronized block and can inside a

withLock

?

Because

Mutex.withLock()

is suspend itself

Mystery solved. Thank you.