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Re: writing backend extensions using Visual Studio

From: Greg Landrum <greg(dot)landrum(at)gmail(dot)com>
To: pgsql-hackers-win32(at)postgresql(dot)org
Subject: Re: writing backend extensions using Visual Studio
Date: 2005-03-26 15:58:30
Message-ID: 60825b0f05032607584c245e3a@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers-win32
On Fri, 25 Mar 2005 17:57:07 -0500, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Greg Landrum <greg(dot)landrum(at)gmail(dot)com> writes:
> > After playing around for a while, I managed to get a DLL to build and
> > work at least far enough that I can CREATE and call the functions from
> > psql.  However, it looks like every argument I pass into the functions
> > comes in as null (e.g. PG_ARGISNULL returns true). This clearly is
> > less than helpful. :-)
> 
> Sounds like MSVC is interpreting the layout of the FunctionCallInfo
> struct differently than the MinGW compiler did.  You should probably
> look into whether there are "pragma pack" directives lurking in your
> program.  ("pragma pack" is evil...)

I've got the library stripped down to the bare minimum (just a couple
of demo functions) and I can't seem to find any uses of pragma pack,
so I don't think that's it.

-greg

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Subject: Re: writing backend extensions using Visual
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