From: Victor Wagner <vitus@wagner.pp.ru>
To: pgsql-hackers@postgresql.org
Subject: Re: Use pread and pwrite instead of lseek + write and read
Date: Wed, 17 Aug 2016 14:03:01 +0300
Message-ID: <20160817140301.4fd397d2@fafnir.local.vm> (raw)
In-Reply-To: <CABUevEzZ=CGdmwSZwW9oNuf4pQZMExk33jcNO7rseqrAgKzj5Q@mail.gmail.com>
References: <a86bd200-ebbe-d829-e3ca-0c4474b2fcb7@ohmu.fi>
<20160817123437.44f3f60a@fafnir.local.vm>
<CABUevEzZ=CGdmwSZwW9oNuf4pQZMExk33jcNO7rseqrAgKzj5Q@mail.gmail.com>
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On Wed, 17 Aug 2016 12:17:35 +0200
Magnus Hagander <magnus@hagander.net> wrote:
> On Wed, Aug 17, 2016 at 11:34 AM, Victor Wagner <vitus@wagner.pp.ru>
> wrote:
> > I don't think that all platforms, supported by PostgreSQL support
> > this API. Especially, I cannot find any mention of pread/pwrite in
> > the Win32 except this thread on stackoverflow:
> >
> >
> Yeah, Windows does not have those API calls, but it shouldn't be
> rocket science to write a wrapper for it. The standard windows APIs
> can do the same thing -- but they'll need access to the HANDLE for
> the file and not the posix file descriptor.
There is _get_osfhandle function, which allows to find out Windows
HANDLE associated with posix file descriptor.
Really my question was - someone should write these wrappers into
src/port and add corresponding test to the configure and/or CMakefile
for this patch to be complete.
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To: pgsql-hackers@postgresql.org
Cc: vitus@wagner.pp.ru
Subject: Re: Use pread and pwrite instead of lseek + write and read
In-Reply-To: <20160817140301.4fd397d2@fafnir.local.vm>
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