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From: John Maddock (john_at_[hidden])
Date: 2008-04-08 04:17:39

Peter Dimov wrote:
> I'm looking at the results of some new tests I added to smart_ptr:
> spinlock_try_test, yield_k_test, and I'm seeing failures on platforms
> that (in single threaded mode, i.e. without <threading>multi)
> reality do one of:
> 1. provide stub implementations of pthread_mutex_*, failing a
> pthread_mutex_trylock test;
> 2. provide stubs and segfault on pthread_mutex_trylock;
> 3. fail to link because of missing pthread_mutex_trylock;
> 4. fail to link because of missing sched_yield.
> This isn't particularly odd or surprising. But I think that
> config_test
> ought to fail on these platforms, for the same reason my tests fail.
> The reason the test passes is because boost_has_pthreads.ipp and
> boost_has_sched_yield.ipp are too permissive; the first one only tests
> pthread_mutex_* functions that are stubbed and appear to work, the
> second doesn't attempt to actually call sched_yield and - presumably
> - the linker discards the reference.
> Does this make any sense? :-)

Yes, but the intention was that you check for BOOST_HAS_THREADS before the
other macros.


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