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Date: Mon, 1 Nov 2004 17:32:30 -0500 (EST)
From: Daniel Eischen <deischen@freebsd.org>
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cc: Brian Fundakowski Feldman <green@freebsd.org>
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Subject: Re: cvs commit: src/lib/libpthread/thread thr_mutex.c
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On Mon, 1 Nov 2004, [iso-8859-1] Dag-Erling Sm=F8rgrav wrote:

> Daniel Eischen <deischen@freebsd.org> writes:
> > We use error check mutexes by default, which is allowed by the
> > spec, because they come at no cost [...]
>
> They come at considerable cost.  They make it impossible to use the
> Boehm garbage collector in threaded programs, for instance, because
> pthread_mutex_init() calls malloc() which tries to use a mutex.  There
> is probably a significant performance penalty as well.

No, they all call malloc() since all mutexes are currently pointers
to thingies.

--=20
Dan Eischen