> Date: Thu, 11 Sep 2014 16:24:53 +0000 > From: Edward Thomson <ethom...@edwardthomson.com> > Cc: bug-gnulib@gnu.org > > On Thu, Sep 11, 2014 at 06:18:19PM +0300, Eli Zaretskii wrote: > > > > Are you using the latest gnulib? A similar problem in 'socket' was > > fixed about 3 months ago (see commit aaaf546); since 'poll' calls > > 'select', perhaps that fix also solves your problems in 'poll'? > > I'm afraid it does not; we use only the poll compatibility function, > and not select. We use the select in ws2_32.dll.
Maybe if you import the select module from gnulib, in addition to poll, the problem will be solved? > > I believe you alluded to the fact that GetTickCount is not affected by > > system clock adjustments. That is true, but it is not strictly > > monotonically increasing: it wraps around after 49.7 days. From the > > MSDN documentation at > > http://msdn.microsoft.com/en-us/library/windows/desktop/ms724408%28v=vs.85%29.aspx: > > That's correct, but a wraparound during the sleep should be well handled > since they're all unsigned types. What happens if GetTickCount returns a small value, after the wraparound, while 'start' has a large value before the wraparound? Subtracting the latter from the former will give a very large positive value, right? > Is your concern that we cannot detect if we end up sleeping for 50 > days and cannot detect that we wrapped twice? No, my concern is if you start the sleep 49.7 days after the system was started.
