> I ran into this when I was
> working on GetNamedDSA() and GetNamedDSHash()
Thanks for mentioning these, I didn't notice them when I rebased on
the master branch. One of my use cases was this, I implemented
something similar to GetNamedDSHash - it's a generic wrapper for
dshash in C++, and I ran
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 th
> On Wed, Dec 03, 2025 at 02:27:29PM -0600, Sami Imseih wrote:
> > There are probably other good reasons to allow a generic argument
> > to the init callback. Besides the lwlock name, I can see someone
> > wanting to pass some other initialization info that may vary
> > depending on extension GUCs,
On Wed, Dec 03, 2025 at 02:27:29PM -0600, Sami Imseih wrote:
> There are probably other good reasons to allow a generic argument
> to the init callback. Besides the lwlock name, I can see someone
> wanting to pass some other initialization info that may vary
> depending on extension GUCs, etc.
The
> My gut feeling is that this is an obscure enough use-case that this
> workaround is probably sufficient, but I am interested to hear more...
There are probably other good reasons to allow a generic argument
to the init callback. Besides the lwlock name, I can see someone
wanting to pass some oth
On Wed, Dec 03, 2025 at 12:47:46PM -0600, Sami Imseih wrote:
> Can you provide more details on the use-case?
I think the main use-case is creating multiple DSM segments in the registry
that use the same initialization callback. I ran into this when I was
working on GetNamedDSA() and GetNamedDSHas
Hi,
Can you provide more details on the use-case?
> For example, the documentation for creating LWLocks after startup [1]
> suggests creating locks in this callback. That works fine as long as
> the callback only needs to create a hardcoded lock.
The callback is called on the first invocation of
