Re: [Boost-bugs] [Boost C++ Libraries] #8006: Boost::Chrono Assertion at startup - steady_clock::now() - Windows

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #8006: Boost::Chrono Assertion at startup - steady_clock::now() - Windows
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-01-09 06:27:28

#8006: Boost::Chrono Assertion at startup - steady_clock::now() - Windows
-------------------------------+----------------------
  Reporter:  meckschlager@…    |      Owner:  viboes
      Type:  Bugs              |     Status:  assigned
 Milestone:  To Be Determined  |  Component:  chrono
   Version:  Boost 1.50.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+----------------------

Comment (by viboes):

 Please, could you try this patch


 {{{
 diff --git a/include/boost/chrono/detail/inlined/win/chrono.hpp
 b/include/boost/chrono/detail/inlined/win/chrono.hpp
 index 84cac01..e2128d6 100644
 --- a/include/boost/chrono/detail/inlined/win/chrono.hpp
 +++ b/include/boost/chrono/detail/inlined/win/chrono.hpp
 @@ -38,12 +38,19 @@ namespace chrono_detail
      static double nanosecs_per_tic =
 chrono_detail::get_nanosecs_per_tic();

      boost::detail::winapi::LARGE_INTEGER_ pcount;
 -    if ( (nanosecs_per_tic <= 0.0L) ||
 -            (!boost::detail::winapi::QueryPerformanceCounter( &pcount ))
 )
 +    if ( nanosecs_per_tic <= 0.0L )
      {
 -      BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
 +      BOOST_ASSERT(0 && "Boost::Chrono - get_nanosecs_per_tic Internal
 Error");
        return steady_clock::time_point();
      }
 +    unsigned times=0;
 +    while ( ! boost::detail::winapi::QueryPerformanceCounter( &pcount ) )
 +    {
 +      if ( ++times > 3 ) {
 +        BOOST_ASSERT(0 && "Boost::Chrono - QueryPerformanceCounter
 Internal Error");
 +        return steady_clock::time_point();
 +      }
 +    }

      return steady_clock::time_point(steady_clock::duration(
        static_cast<steady_clock::rep>((nanosecs_per_tic) *
 pcount.QuadPart)));

 }}}

 Giving as result

 {{{
   steady_clock::time_point steady_clock::now() BOOST_NOEXCEPT
   {
     static double nanosecs_per_tic =
 chrono_detail::get_nanosecs_per_tic();

     boost::detail::winapi::LARGE_INTEGER_ pcount;
     if ( nanosecs_per_tic <= 0.0L )
     {
       BOOST_ASSERT(0 && "Boost::Chrono - get_nanosecs_per_tic Internal
 Error");
       return steady_clock::time_point();
     }
     unsigned times=0;
     while ( ! boost::detail::winapi::QueryPerformanceCounter( &pcount ) )
     {
       if ( ++times > 3 ) {
         BOOST_ASSERT(0 && "Boost::Chrono - QueryPerformanceCounter
 Internal Error");
         return steady_clock::time_point();
       }
     }

     return steady_clock::time_point(steady_clock::duration(
       static_cast<steady_clock::rep>((nanosecs_per_tic) *
 pcount.QuadPart)));
   }

 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8006#comment:19>
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