From owner-freebsd-hackers  Tue Aug  6  8: 7:11 2002
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Date: Tue, 6 Aug 2002 17:08:49 +0200 (CEST)
From: Martin Blapp <mb@imp.ch>
To: Alexander Kabaev <ak03@gte.com>
Cc: <openoffice@FreeBSD.ORG>, <jdp@FreeBSD.ORG>,
	<hackers@FreeBSD.ORG>
Subject: Re: Help needed. Deadlock in rtld makes openoffice build hang again
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> wlock_acquire(void *lock)
> {
>     Lock *l = (Lock *)lock;
>     sigset_t tmp_oldsigmask;
>
>     for ( ; ; ) {
>         sigprocmask(SIG_BLOCK, &fullsigmask, &tmp_oldsigmask);
>         if (cmpxchgl(0, WAFLAG, &l->lock) == 0)
>             break;
>         sigprocmask(SIG_SETMASK, &tmp_oldsigmask, NULL);
> +            while (l->lock & WAFLAG)
> +            ;   /* Spin */
>     }

That did not help at all. I just got a hang again.

Martin


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