ptobs for Guile 2.2+

ptobs for Guile 2.2+

[Thien-Thi Nguyen]

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I'm trying to upgrade Guile-PG for Guile 2.2 (and possibly 3.0).
It currently uses ptobs for the large object ("lobj") support in
libpq, mostly for buffering and buffer synchronization.  I see
in libguile/ports.h (Guile 2.0.13), however:

 /* Hey you!  Yes you, reading the header file!  We're going to
    deprecate scm_ptobs in 2.2, so please don't write any new
    code that uses it.  Thanks.  */

So, what do people do for "old" code that currently uses ptobs
(i.e., for Guile 2.0 and earlier)?  Is there a recommended
migration path (besides "give up" :-D)?  What am i missing?

-- 
Thien-Thi Nguyen -----------------------------------------------
 (defun responsep (query)               ; (2020) Software Libero
   (pcase (context query)               ;       = Dissenso Etico
     (`(technical ,ml) (correctp ml))
     ...))                              748E A0E8 1CB8 A748 9BFA
--------------------------------------- 6CE4 6703 2224 4C80 7502


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Re: ptobs for Guile 2.2+

[Ludovic Courtès]

Hi ttn,

Thien-Thi Nguyen <ttn@gnuvola.org> skribis:

> I'm trying to upgrade Guile-PG for Guile 2.2 (and possibly 3.0).
> It currently uses ptobs for the large object ("lobj") support in
> libpq, mostly for buffering and buffer synchronization.  I see
> in libguile/ports.h (Guile 2.0.13), however:
>
>  /* Hey you!  Yes you, reading the header file!  We're going to
>     deprecate scm_ptobs in 2.2, so please don't write any new
>     code that uses it.  Thanks.  */
>
> So, what do people do for "old" code that currently uses ptobs
> (i.e., for Guile 2.0 and earlier)?  Is there a recommended
> migration path (besides "give up" :-D)?  What am i missing?

Giving up sounds like a reasonable strategy to me at this point in
time.  :-)

If you want to do it anyway, I know GDB and GnuTLS have port code that
deals with both 2.0 and 2.2/3.0, perhaps that can help.

HTH,
Ludo’.

Re: ptobs for Guile 2.2+

[Thien-Thi Nguyen]

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() Ludovic Courtès <ludo@gnu.org>
() Sun, 13 Dec 2020 17:25:51 +0100

   > So, what do people do for "old" code that currently uses
   > ptobs (i.e., for Guile 2.0 and earlier)?  Is there a
   > recommended migration path (besides "give up" :-D)?  What
   > am i missing?

   Giving up sounds like a reasonable strategy to me at this
   point in time.  :-)

I suppose it's reasonable at any point of time.  :-D

   If you want to do it anyway, I know GDB and GnuTLS have port
   code that deals with both 2.0 and 2.2/3.0, perhaps that can
   help.

Thanks for the pointer.  I'll see what i can scrounge there.

-- 
Thien-Thi Nguyen -----------------------------------------------
 (defun responsep (query)               ; (2020) Software Libero
   (pcase (context query)               ;       = Dissenso Etico
     (`(technical ,ml) (correctp ml))
     ...))                              748E A0E8 1CB8 A748 9BFA
--------------------------------------- 6CE4 6703 2224 4C80 7502


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