From: | "Lee Kindness" <lkindness(at)csl(dot)co(dot)uk> |
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To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | "Lee Kindness" <lkindness(at)csl(dot)co(dot)uk>, "Bruce Momjian" <pgman(at)candle(dot)pha(dot)pa(dot)us>, "Kurt Roeckx" <Q(at)ping(dot)be>, "Peter Eisentraut" <peter_e(at)gmx(dot)net>, "Marc G(dot) Fournier" <scrappy(at)hub(dot)org>, "Larry Rosenman" <ler(at)lerctr(dot)org>, "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org>, "Greg Stark" <gsstark(at)mit(dot)edu>, "PostgreSQL Development" <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Unixware Patch (Was: Re: Beta2 Tag'd and Bundled ...) |
Date: | 2003-09-01 20:57:07 |
Message-ID: | 002401c370cb$9e6643c0$1f90e150@coulter |
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Lists: | pgsql-hackers |
"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> Lee Kindness <lkindness(at)csl(dot)co(dot)uk> writes:
> > Guys, too much thought is being spent on this...
> > 1. For the _r functions we "need" we should ALWAYS use them if the
> > system we are building on has them - they WILL be thread-safe.
>
> > 2. If the system is missing a _r function then we implement a wrapper
> > to call the normal non-_r version. However we do NOT make this wrapper
> > call thread-safe - we assume the non-_r version already is.
>
> That assumption is exactly what Peter is unhappy about. With the above
> approach we will happily build a "thread safe" library on systems that
> are in fact not thread safe at all. Peter wants --enable-thread-safety
> to fail on non-safe systems.
Yeah, I see that as Peter's main objection too. But it really isn't worth
the
trouble, on such systems a user's app will be so horribly broken WRT
threads anyway. It isn't our job to point out the shortcomings of their
system.
Really such systems don't exist - if libc doesn't have _r calls and the
traditional ones are not thread-safe then do you think it'll have a
threading
library which can run >1 thread concurrently?
On such a system the users troubles will start long before PostgreSQL
if they play with threads.
L.
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