Re: pgsql: Invent a memory context reset/delete callback mechanism.

On 27 February 2015 at 22:17, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Invent a memory context reset/delete callback mechanism.
>
> This allows cleanup actions to be registered to be called just before a
> particular memory context's contents are flushed (either by deletion or
> MemoryContextReset). The patch in itself has no use-cases for this, but
> several likely reasons for wanting this exist.
>
> In passing, per discussion, rearrange some boolean fields in struct
> MemoryContextData so as to avoid wasted padding space. For safety,
> this requires making allowInCritSection's existence unconditional;
> but I think that's a better approach than what was there anyway.

Please can you document this in src/backend/utils/mmgr/README or other place?

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