Learning Concurrency in Kotlin

Interacting with mutual exclusions

More often than not, using withLock() will be enough for your needs. But in case you need more control of the locking and unlocking, you can use the suspending function lock() and the regular—as in non-suspending—function unlock():

val mutex = Mutex()mutex.lock() // this will suspend if the lock has been taken alreadyprint("I am now an atomic block")mutex.unlock() // this is not suspending

As a matter of fact, the implementation of withLock() is quite close to that. This is the current implementation of it:

lock(owner)try {    return action()} finally {    unlock(owner)}

You can use the property isLocked to validate whether the mutex is currently locked:

val mutex = Mutex()mutex.lock()mutex.isLocked // truemutex ...