Re: Fwd: 8.0 Beta3 worked, RC1 didn't!

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Gary Doades <gpd(at)gpdnet(dot)co(dot)uk>
Cc: pgsql-hackers-win32(at)postgresql(dot)org
Subject: Re: Fwd: 8.0 Beta3 worked, RC1 didn't!
Date: 2004-12-24 16:03:31
Message-ID: 8690.1103904211@sss.pgh.pa.us
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Gary Doades <gpd(at)gpdnet(dot)co(dot)uk> writes:
> AFAIK Win32 does not care where in private process address space the
> "shared memory" segment is. It can be mapped to different addresses in
> different processes and still share the same physical address space.
> This is why Win32 puts the private shared address anywhere in its own
> address space, because it doesn't matter.

Win32 may not care, but we do. The shared memory segment must be mapped
at the same address in every backend.

> If you try to force it to any particular private process address you may
> fail as you don't always know where program code (DLLs etc.) may be loaded.

This is (or ought to be) irrelevant, because we are only talking about
instances of a single executable.

regards, tom lane

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