Does ThingML support non-determinism like in FSM theory

[FeltonXuAtECNU]

state Init{ transition -> Init event timer?timer_timeout action do print "OutdoorTempSensor: send a value\n" sendPort!outdoorTemp(5) end transition -> BCD event timer?timer_timeout action do print "abc" // do some complex algorithm end }
Does this kind of non-determinism scenario could be modelled in ThingML? If could, what should I do?

[brice-morin]

It can, but will be non-derterministic at runtime. Our checker (currently being implemented will detect that). If you want both transition to be triggered, you should define a parallel region.

[FeltonXuAtECNU]

Also, a pretty easy one but can't find them on toy example. datatype Integer @c_type "int" @c_byte_size "2" @js_type "int" @java_type "int" @java_primitive "true";

How to write a datatype Double?

[brice-morin]

See https://github.com/SINTEF-9012/ThingML/blob/master/org.thingml.samples/src/main/thingml/datatypes.thingml

Basically define

datatype Double

And a the proper annotation(s) to map it to the concrete type for the platform you want to target

[FeltonXuAtECNU]

ThingML model is like this:

statechart HelloWorld init Greetings { 

    state Greetings { 

        transition -> Hi
        action print "Hi\n"

        transition -> Bye  
        action print "Hello World!\n" 

    } 

    state Bye { 
        on entry print "Bye.\n" 
    } 

    state Hi {
        on entry print "Hi ben!\n"
    }

} 

but I got something like this all the time, and that doesn't make sense for me: felton@ubuntu:~/Downloads/thingml-gen/posix/HelloCfg$ ./HelloCfg Hi Hi ben! ^C felton@ubuntu:~/Downloads/thingml-gen/posix/HelloCfg$ ./HelloCfg Hi Hi ben! ^C

So I posted the issues about non-determinism, so you don't have to close the issues so quickly.

[brice-morin]

It makes sense, your state machine is not deterministic. It appears that from Greetings the first transition will be triggered, going to the Hi state, hence producing sensible output:

Hi
Hi ben!

However, nothing prevents that sometimes, on some other platforms, the other transition could be fired.