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Re: invalid pthread_t value?


From: Neal H. Walfield
Subject: Re: invalid pthread_t value?
Date: Sun, 23 Dec 2007 11:05:58 +0100
User-agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 (Shij┼Ź) APEL/10.6 Emacs/21.4 (i486-pc-linux-gnu) MULE/5.0 (SAKAKI)

At Sat, 22 Dec 2007 23:15:58 +0100,
Samuel Thibault wrote:
> The NSPR needs an invalid value for pthread_t, which the Hurd doesn't
> officially have. I had proposed them to use -1 (since that would mean
> that there are something like 2^32 threads running, which just can't
> be...), but they don't seem to have accepted this (the patch seems to
> have been turned into a #error instead... No actual mail feedback).
> 
> Since pthread_t is typedefed to int, maybe we can define
> PTHREAD_THREADS_MAX to INT_MAX to actually set an official limit (that
> limit exists anyway since above INT_MAX the comparisons in libpthread
> become bogus), and then tell them they can really use -1?

The implementation never returns a TID with a value of 0.  Is this
sufficient?  Or do you need the implementation to somehow reject this
invalid value?

Neal




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