const classafConcurrent::SynchronizedState

Provides synchronized access to a (non- const) mutable state object.

SynchronizedState creates the state object in its own thread and provides access to it via the withState() and getState() methods. Note that by their nature, these methods are immutable boundaries. Meaning that while data in the State object can be mutable, data passed in and out of these these boundaries can not be.

SynchronizedState is designed to be scope safe, that is you cannot accidently call methods on your State object outside of the withState() and getState() methods.

Example usage:

 
sync := SynchronizedState(ActorPool(), Mutable#)
msg  := "That's cool, dude!"

val  := sync.getState |Mutable state -> Int| {
    state.buf.writeChars(msg)
    return state.buf.size
}

class Mutable {
    Buf buf := Buf()
}