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Message-ID: <001301c0c5af$9cb7e520$0200a8c0@lifelesswks>
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: <cygwin AT cygwin DOT com>
References: <037701c0c3ab$9049bf30$0200a8c0 AT lifelesswks> <20010413221222 DOT C5606 AT dothill DOT com> <006001c0c4af$179b79c0$0200a8c0 AT lifelesswks> <20010414223139 DOT A906 AT redhat DOT com> <001701c0c557$02a861b0$0200a8c0 AT lifelesswks> <20010415090600 DOT A8359 AT redhat DOT com>
Subject: Re: fork expert needed: (was Re: pthreads update for the adventurous)
Date: Sun, 15 Apr 2001 23:25:58 +1000
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----- Original Message -----
From: "Christopher Faylor" <cgf AT redhat DOT com>
To: <cygwin AT cygwin DOT com>
Sent: Sunday, April 15, 2001 11:06 PM
Subject: Re: fork expert needed: (was Re: pthreads update for the
adventurous)


> On Sun, Apr 15, 2001 at 12:51:44PM +1000, Robert Collins wrote:
> >> I added this dll relocation stuff last year to help with perl.  It
> >> wasn't fun.
> >
> >Oh. Well I infer that it only occurs with threads enabled in python,
or
> >Jason wouldn't be telling us. Any hints Chris for possible
races/locks
> >that might prevent the child doing the relocation if the parent has
> >active threads ?
>
> I believe the relocation happens during DLL initialization when all
> other threads are suspended.
>
> cgf
>

fork() doesn't suspend all the threads in the parent. The thread doing
the call blocks, and the child is started with only one thread. I don't
believe all the threads are meant to be suspended under posix threads
either - but I'll look into this.

Rob


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