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Re: good examples of Emacs modules?

From: Óscar Fuentes
Subject: Re: good examples of Emacs modules?
Date: Fri, 01 Apr 2016 15:25:42 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.92 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

> I think you want to wrap some kind of "handle" that is meaningful to
> libgit2 into a user-ptr object (see the existing docs about modules
> for details about these).  A user-ptr object has a finalizer, a
> function that is called by GC when the object goes out of scope.

This means that GCing the object is unpredictable, right? Also, if the
API uses a struct as the session object, you need to store it somewhere
and expose a pointer to it to the Elisp code; that is, you can't put
arbitrary data on the Elisp memory space.

> The
> finalizer function should do whatever libgit2 needs to close the
> session and free whatever resources the session used.
> You have a demo if using a user-ptr in modules/mod-test/.


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