Re: Trigger action at exit?

[Neil Jerram]

address@hidden (Ludovic Courtès) writes:

> Hi,
>
> Neil Jerram <address@hidden> writes:
>
>> In the light of this thread, and another one about atexit in AutoGen,
>> perhaps we should look at providing a Scheme-level at-exit primitive?
>> The main point, I think, would be to guarantee that anything
>> registered by (at-exit ...) or scm_at_exit (...) would run _before_
>> Guile starts doing its own cleanups.
>
> Here, with only Scheme code, `dynamic-wind' should do the job.
>
> In the AutoGen case, where C code is involved, that might be necessary.
> OTOH, the AutoGen folks might as well be able to use `dynamic-wind', who
> knows?  :-)

I agree that any main program should be able to handle its own cleanup
using dynamic-wind.  What about a library, though?

> (I tend to be reluctant to adding such a thing because it looks
> fragile.)

In what sense fragile?

> Thanks,
> Ludo'.

Regards,
      Neil