Re: [boost] boost::thread dependency on boost::chrono (windows implementation)

Subject: Re: [boost] boost::thread dependency on boost::chrono (windows implementation)
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2013-06-28 01:42:00

Le 27/06/13 16:42, Christian Hägele a écrit :
> Hello,
>
> as boost::thread now depends on boost::chrono I have the following 
> questions:
Yes, this is dependency that I have not reached to make optional on Windows.
>
> In boost::chrono on windows the the steady_clock is implemented via 
> QueryPerformanceCounter. This may lead to wrong results because on 
> some systems QueryPerformanceCounter gives different results on 
> different processors.
> In our software we encountered theses problems regularly on some 
> customers machines and thus stopped using QueryPerformanceCounter 
> without additional checking.
> The problem I'm talking about is described as a TODO in 
> boost/chrono/system_clocks.hpp
>
Yes, I remember this comment.
> My questions is if functions like boost::thread::timed_join or 
> boost::mutex::timed_wait may have similar problems on hardware where 
> QueryPerformanceCounter gives wrong result. Is there a way (like a 
> preprocessor macro) to have boost::thread use the old implementation 
> independent from boost::chrono?
>
>
Unfortunately I don't know how to implement a real steady_clock on 
windows platform, and I was wondering if it shouldn't be removed.
Of course if someone knows how to do it, patches are welcome.

Best,
Vicente