[imp-hackers] cl-ext:exit

[Raymond Toy]

Brian Mastenbrook wrote:
> On Jul 2, 2009, at 9:32 AM, Sam Steingold wrote:
>
>   
>> On Thu, Jul 2, 2009 at 2:32 AM, Juan Jose
>> Garcia-Ripoll<juanjose.garciaripoll at googlemail.com> wrote:
>>     
>>> Could we introduce also the notion of "finalizers" or things to be
>>> done before exiting, perhaps in the form of a special variable with a
>>> list of handlers? QUIT then would have to take an additional option,
>>> deciding whether to honor or not those handlers.
>>>       
>> http://clisp.podval.org/impnotes/custom-init-fini.html#fini-hooks
>>
>> 31.1.3. Customizing Termination
>>
>> CUSTOM:*FINI-HOOKS* is run like this:
>>
>> (MAPC #'FUNCALL CUSTOM:*FINI-HOOKS*)
>>     
>
>
> SBCL's interface is very similar:
>
> http://www.sbcl.org/manual/Initialization-and-Exit-Hooks.html
>
> — Variable: sb-ext:*exit-hooks*
> This is a list of functions which are called in an unspecified order  
> when sbcl process exits. Unused by sbcl itself: reserved for user and  
> applications. Using (QUIT :recklessly-p T), or calling exit(3)  
> directly will circumvent these hooks.
>   

Perhaps a bit off-topic, bug having never used any kind of exit hook,
I'd like to know what people actually use them for.  What do you use the
exit hooks for?

Ray