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Subject: Re: [boost] Boost 1.65.0 Release Candidate 3
From: Peppard (peppard+boost_at_[hidden])
Date: 2017-08-15 23:13:00

On 2017-08-15 19:45, David Olsen via Boost wrote:
> On 8/15/2017 6:10 AM, Peppard via Boost wrote:
>> However I maybe found another regression introduced after the 1.64
>> release, this time in Boost.Thread (with pthread implementation and
>> BOOST_HAS_NANOSLEEP). A minimal example:
>> #include <boost/thread/thread.hpp>
>> int main() {
>> boost::this_thread::sleep(boost::posix_time::seconds(1));
>> }
>> This sleeps "forever", however a slightly more complicated program might
>> not. I bisected it to this commit:
>> The problem seems to be the BOOST_THREAD_USEFIXES_TIMESPEC define, which
>> alters some internal behavior, effectively changing
>>> nanosleep({0, 999366710}, NULL)
>> into
>>> nanosleep({1501988898, 350057596}, [stuck for a very long time]
>> . If the sleep is called inside a boost::thread, hidden::sleep_until is
>> implemented via condition.do_wait_until instead of nanosleep, this
>> works. For me a slightly extended test code works as expected if
>> compiled in debug mode but is stuck in release mode. I'm testing under
>> Linux with GCC 7.1 and a Clang++ 5.0.0 snapshot.
> This bug was fixed in the develop branch a couple weeks ago.
> (At least it looks like the same bug. I never tracked down the commit
> that introduced the bug, or figured out whether or not it was a
> regression.)

Looks like this fixes the bug, but as you said, only in develop. And
even with the fix, I get the impression that the library is in a
experimental/unstable state with all the time/clock changes over the
past months. There is even commented out code in some places. And we
have timespec_now() vs timespec_now_realtime(), the first one being used
only when BOOST_THREAD_USEFIXES_TIMESPEC is not defined, but if it's not
defined, the code of timespec_now and timespec_now_realtime is the same,
right? Do I miss something?

Anyway, as it stands, it looks like rc3 thread lib does not pass its own
test suite (stuck e.g. in ex_tennis). Isn't passing the regression test
suite (at least for major platforms) a requirement for an official release?

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