Horton

Re: Proposal: Add a callback data parameter to GetNamedDSMSegment

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Sami Imseih <samimseih@gmail.com>
Cc: Zsolt Parragi <zsolt.parragi@percona.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2025-12-03T21:08:59Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Allow passing a pointer to GetNamedDSMSegment()'s init callback.

  2. Move dynamically-allocated LWLock tranche names to shared memory.

On Wed, Dec 03, 2025 at 02:59:16PM -0600, Sami Imseih wrote:
> Yes, that's true. It will be hard to find other good use-cases that
> can't be solved with a global variable, but we can also say this is
> a low-cost change, so why not just do it.

Well, for one, it requires all existing extensions that use
GetNamedDSMSegment() to be updated.  That might not be too terrible, but in
any case, I think we need a stronger reason than the simplicity of the
implementation to do something.

-- 
nathan