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Re: Lisp object that refers to a C struct

From: Paul Eggert
Subject: Re: Lisp object that refers to a C struct
Date: Thu, 18 Oct 2012 00:20:11 -0700
User-agent: Mozilla/5.0 (X11; Linux i686; rv:16.0) Gecko/20121011 Thunderbird/16.0.1

On 10/17/2012 09:50 PM, Eli Zaretskii wrote:
>> Won't this have problems on platforms where
>> > or where MOST_POSITIVE_FIXNUM < (EMACS_INT) pwatch?

> Given what XLI does, I don't see how this could happen

To be honest I haven't followed all the back-and-forth on this,
but in general it's not safe to convert a pointer to
an Emacs fixnum, as this can lose information: the payload
of an Emacs fixnum is typically narrower than a pointer.

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