From: Logan Capaldo <logancapaldo@...>
Date: 2007-07-08T09:24:16+09:00
Subject: Re: Ruby for MMORPG Scripting

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On 7/7/07, TongKe Xue <xue@ai.stanford.edu> wrote:
>
> Hey Everyone,
>
>    I'm working on a massive simulation project (like worldforge). I need
> to
> be able to allow users to script objects in the world. I am thinking of
> ussing Ruby as my scripting language of choice. However:
>
>    (1) I need to be able to limit the memory usage of the object.
>    (2) I need to be able to limit the CPU cycle usage of the object.
>
>    I.e. I don't want users to use my game to calculate digits of PI.
>
>    Is there a way (or an existing implemntation of Ruby) to let me create
> these light-weight tasklets/threadlets/processlets (there's too many
> objects to have a UNIX process for each object) such that I can limit the
> memory/cpu usage on each?


Not really as far as I know. You can try using Timeout to limit the amount
of time a given task runs, but that is certainly not infalliable.  Short of
creating your own ruby impl. / heavily modifying another ruby impl. the only
way I could think to do this would be to make each a process and use the OS
facilities (which you said you didn't want to use). Unless maybe java has
per thread cpu / memory limits, in which case you might get jruby to do what
you want.

Thanks,
> --TongKe
> (When replying, please do reply all as I might unsubscribe due to the
> traffic.)
>
>

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