It is very good to hear that other people were also considering GC on mindstorm.
I also think that implementing garbage collector sooner or later will be a must
as newer versions of mindstorm will come with more memory and faster processor.
Plus it will make java on NXT even more popular. After all - automatic garbage
collection is one of the key features that led to Java's success.
----- Original Message ----
From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
To: [email protected]
Sent: Tuesday, January 16, 2007 2:53:39 PM
Subject: Re: [Lejos-discussion] Garbage Collector
I also had a look a few months back, and although there isn't much memory in
the RCX there would probably be enough for a half-decent garbage collector. Of
course, there would be a reasonably large amount of overhead so the number of
objects you can have active would be quite a lot less than now. The problems I
ran into were more to do with resolving what is and isn't a reference on the
stack.
In the end, I played around with the memory management code (to try to address
the problems of determining references) but didn't get started on the garbage
collector itself. I got it back to a working state in the emulator, but kept
getting crashes when running on the RCX. I got frustrated trying to find the
bug and took a break. I keep meaning to revisit it. I'd be happy to discuss my
thoughts so far.
> Hi,
>
> I took a look at the source code quite a while ago to implement a garbage
> collector for the RCX version of lejos. I ended up with that it would not
> be difficult to implement, but that there was not enough memory in the
> RCX. If someone wants to work on with this for the NXT I can share my
> findings (I would have to take a new look at this, but it would not take
> much time for me). I will not work on this, because I have no NXT yet (and
> will not by one for the next year).
>
> Also I implemented a small file-system based on the PersistentMemoryArea
> (which also was useless with such less memory). I can take a look, if I
> find the code, if someone wants to go into this.
>
> Regards,
>
> Arne
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