Re: [myhdl-list] Global state and multiple instances

[Juan P. C. <jp...@gm...>]

Henry, do you have a minimal working example?
Thanks,
JP

On Thu, May 7, 2015 at 10:33 AM, Henry Gomersall <he...@ca...> wrote:

> On 07/05/15 15:10, Henry Gomersall wrote:
> > The other problem is the state on a Signal object is not being handled
> > properly. I tried to implement the solution for this (currently
> > commented out in _simulator.py) in which on each context switch, the
> > signals are stashed (using _Signal._stash_state) to the context that is
> > being departed, and then the signal state is reloaded when it is
> > reentered (susing _Signal._recall_state). The tests begin to work and
> > then one gets into an infinite loop because some waiter or other is
> > missing. I'm not sure quite what I've missed. This is hard to bug
> > isolate because the tests all run in isolation or indeed, in their
> > respective test classes.
>
> I was wrong, all the tests actually seem to run with no error. The
> problem is that the overhead when the signal list becomes large is huge
> and really affects the simulation time.
>
> This can be dealt with with a bit of thought I'm sure. Most of the time,
> nothing is changed, so the Signal does not need to be stashed.
>
> I've pushed the changes with the full code.
>
> Oh, btw, it _should_ be thread safe, due to using thread local storage,
> but I haven't verified this.
>
> Cheers,
>
> Henry
>
>
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