[Boost-bugs] [Boost C++ Libraries] #7042: Avoiding time_point and duration dependency on time.h and CLOCK_REALTIME

Subject: [Boost-bugs] [Boost C++ Libraries] #7042: Avoiding time_point and duration dependency on time.h and CLOCK_REALTIME
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-06-28 13:03:37

#7042: Avoiding time_point and duration dependency on time.h and CLOCK_REALTIME
-------------------------------------+--------------------------------------
 Reporter:  1czajnik@…               |       Owner:  viboes 
     Type:  Feature Requests         |      Status:  new    
Milestone:  To Be Determined         |   Component:  chrono 
  Version:  Boost Development Trunk  |    Severity:  Problem
 Keywords:                           |  
-------------------------------------+--------------------------------------
 Hello,

 The file chrono/config.hpp enforces that time.h defines CLOCK_REALTIME:
 {{{
 # if defined( BOOST_CHRONO_POSIX_API )
 #   define BOOST_CHRONO_HAS_PROCESS_CLOCKS
 #   include <time.h>  //to check for CLOCK_REALTIME and CLOCK_MONOTONIC
 and _POSIX_THREAD_CPUTIME
 #   if defined(CLOCK_REALTIME)
 #     if defined(CLOCK_MONOTONIC)
 #        define BOOST_CHRONO_HAS_CLOCK_STEADY
 #     endif
 #   else
 #     error <time.h> does not supply CLOCK_REALTIME
 #   endif
 ...
 # endif
 }}}

 It seems that files: chrono/duration.hpp and chrono/time_point.hpp don't
 need to depend on <time.h> or CLOCK_REALTIME.
 If a compiler provides a <time.h>, which doesn't define CLOCK_REALTIME, or
 even doesn't provide <time.h>, it would be nice to still be able to use
 chrono/duration.hpp or chrono/time_point.hpp.

 Regards,
 Kris

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7042>
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