Re: [Emacs-diffs] emacs-25 3eb93c0: Rely on conservative stack scanning to find "emacs_value"s

[Daniel Colascione]

On 03/30/2016 11:26 AM, Philipp Stephani wrote:
> 
> 
> Paul Eggert <address@hidden <mailto:address@hidden>> schrieb am
> Mi., 30. März 2016 um 03:35 Uhr:
> 
>     On 03/29/2016 03:07 AM, Philipp Stephani wrote:
>     >
>     >
>     >
>     > - From a user's perspective, it removes NULL as a sentinel value to
>     > signal an error.
> 
>     It's not clear that this feature is worth the hassle of supporting it.
> 
> 
> If emacs_value* were a real pointer, then the feature would come for free.

As would support for arbitrary future GC schemes and robustness against
arbitrary clever things compilers might do with pointers in memory.
There are lots of reasons to use a real handle table and lots of reasons
to avoid this kind of value stuffing.

But hey, we can't even get signal handlers right, so we shouldn't expect
too much.

signature.asc
Description: OpenPGP digital signature