Re: [HACKERS] Parallel bitmap heap scan

On Wed, Feb 8, 2017 at 5:21 AM, Dilip Kumar <dilipbalaut@gmail.com> wrote:
> On Wed, Feb 8, 2017 at 3:44 AM, Robert Haas <robertmhaas@gmail.com> wrote:
>>>> +#ifndef SH_USE_NONDEFAULT_ALLOCATOR
>>>> +
>>>
>>> That should probably be documented in the file header.
>>
>> Right.  OK, did that and a few other cleanups, and committed.
>
> I think we need to have prototype for the default allocator outside of
> #ifndef SH_USE_NONDEFAULT_ALLOCATOR. Because the file e.g. tidbitmap.c
> who wants to use SH_USE_NONDEFAULT_ALLOCATOR will provide the
> allocator function definition but it can not have the declaration of
> those function as that function take SH_TYPE as input and that will be
> only defined once we include the simplehash.h.
>
> So basically we can not declare prototype before including
> simplehash.h for allocator. And, if we don't declare we will get
> "implicit declaration warning" because simplehash itself is using
> those functions.
>
> The solution is simplehash.h, should always declare it, and provide
> the definitions only if SH_USE_NONDEFAULT_ALLOCATOR is not defined.
> Attached patch does that.

Makes sense, will commit.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company