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Message-ID: <1409388858.4476.232.camel@eris.loria.fr>
Date: Sat, 30 Aug 2014 10:54:18 +0200
From: Jens Gustedt <jens.gustedt@...ia.fr>
To: musl@...ts.openwall.com
Subject: Re: C threads, v. 6.2
Am Samstag, den 30.08.2014, 09:43 +0200 schrieb Jens Gustedt:
> Am Samstag, den 30.08.2014, 01:30 -0400 schrieb Rich Felker:
> > I don't see any problem if an application has both types visible in
> > one of it's TUs, since no "aliasing" takes place on the app side. The
> > tagless structure "struct { union {...} __u; }" (whichever instance of
> > it) is simply zero-initialized on the application TU side. On the
> > implementation side, functions like pthread_mutex_trylock access a
> > tagless structure "struct { union {...} __u; }", of which they have
> > only one defined: the one referenced by the pthread_mutex_t typedef.
>
> As I said, on the side of the current C thread implementation that
> needs a thorough revision to be sure that none of the TU sees two
> types. I'll look into that.
There are several C thread functions that use internals from
pthread_impl.h.
- thrd_xxx and tss but these don't use mutex or cv
- mtx but these only use minimal stuff
so this should be doable.
Jens
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