Re: libpq object hooks

Andrew Dunstan <andrew@dunslane.net> writes:
> Tom Lane wrote:
>> It might work to use the address of the hook callback function as
>> a key for retrieving the associated void * pointer.  You'd need to
>> not register the same callback function more than once per object,
>> but from what I gather here you don't need to.

> Or else have the library return a unique handle when registering hooks,
> rather than supplying a hook name.

Uh, how would that solve your problem?  Seems like the difficulty
shifts from "how do I get the hook data" to "how do I get the key
with which to get the hook data".

            regards, tom lane