Re: [PATCH v2 2/2] pthread: implement try/timed join variants

[Rich Felker <dalias@libc.org>]

On Sun, Oct 11, 2015 at 10:30:20PM -0400, Rich Felker wrote:
> > +int __pthread_timedjoin_np(pthread_t t, void **res, const struct timespec *at)
> > +{
> > +	int tmp, cs, r = 0;
> > +	__pthread_testcancel();
> > +	__pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
> > +	if (cs == PTHREAD_CANCEL_ENABLE) __pthread_setcancelstate(cs, 0);
> > +	while ((tmp = t->tid) && r != ETIMEDOUT && r != EINVAL)
> > +		r = __timedwait_cp(&t->tid, tmp, CLOCK_REALTIME, at, 0);
> > +	__pthread_setcancelstate(cs, 0);
> > +	if (r == ETIMEDOUT || r == EINVAL) return r;
> > +	return __pthread_tryjoin_np(t, res);
> > +}
> > +
> > +int __pthread_join(pthread_t t, void **res)
> > +{
> > +	return __pthread_timedjoin_np(t, res, 0);
> > +}
> > +
> > +weak_alias(__pthread_tryjoin_np, pthread_tryjoin_np);
> > +weak_alias(__pthread_timedjoin_np, pthread_timedjoin_np);
> >  weak_alias(__pthread_join, pthread_join);
> 
> This all looks okay to me. I'll probably commit the patch as-is, as
> long as nobody thinks the reasoning on the tryjoin issue above is
> wrong.

I went ahead and committed patch 1 since it's an obvious bug fix. The
second patch still looks ok to me but I'm going to hold off until
after release because I don't want to rush addition of a new
nonstandard extension without good review.

Rich