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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Drawing to cairo context from within emacs module?
Date: Thu, 05 Dec 2019 17:08:13 +0200
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To: Eivind Fonn <evfonn@gmail.com>
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> From: Eivind Fonn <evfonn@gmail.com>
> Date: Thu, 5 Dec 2019 14:42:58 +0100
> 
> A related but different question. Would it be possible to get access to
> the raw buffer data from dynamic modules? (That is, pointer to the start,
> length and gap information.)

Why do you need to do that from a module?  I'm especially curious in
your reasons to know where the gap is.

Please keep in mind that Emacs relocates the gap and the buffer text
itself at will, so such pointers could easily be invalidated by the
next GC.