[boost] Re: [date_time] enabling microsec_clock under C++Builder

From: Russell Hind (rhind_at_[hidden])
Date: 2003-03-24 07:07:37

Given that the accuracy of Windows GetLocalTime (and GetSystemTime) is 
milliseconds, perhaps a millisec_clock would be better that putting this 
in the microsec_clock?  It would possibly make more sense

Cheers

Russell

Russell Hind wrote:
> C++Builder doesn't currently support the microsec_clock of date_time 
> because of its standard library.  Would it be possible to add code to 
> get the time using Win32 methods as this gives millisecond times? 
> Something like this in microsec_time_clock.hpp seems to work
> 
>     static time_type local_time()
>     {
>     #ifdef __BORLANDC__
>     SYSTEMTIME lt;
>         GetLocalTime(&lt);
> 
>     date_type d = date_type(lt.wYear,
>                             lt.wMonth,
>                             lt.wDay);
> 
>     int adjust = resolution_traits_type::res_adjust() / 1000;
>     time_duration_type td = time_duration_type(lt.wHour,
>                                                lt.wMinute,
>                                                lt.wSecond,
>                                                lt.wMilliseconds * adjust);
>         return time_type(d, td);
>     #else
>     ....
>     #endif
>     }
> 
> Is this Ok, and would it be of interest to anyone?  It could be used for 
> all Win32 compilers (if the adjust statement is correct) or are there 
> reasons why platform specific code wouldn't be wanted in the library?
> 
> We currently log a lot of error information to text files, but 
> sub-second times are useful.  date_time currently doesn't offer this for 
> C++Builder, so that is why we would like something like this added.
> 
> Cheers
> 
> Russell
> 
> 
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