I found out that there's already <boost/date_time/microsec_time_clock.hpp>, but on windows it uses GetSystemTimeAsFileTime(). This raises a potential issue: I don't know if GetSystemTimeAsFileTime() works at millisecond resolution like QueryPerformanceCounter() does, and I don't know if QueryPerformanceCounter() returns some kind of epoch.. the docs are rather lowly-documented on this. I also noticed that getimeofday() wasn't checked for failure in the current boost headers. I also fell on a page which stated that "On Windows, clock() returns the nearest approximation to wall-clock time since the first call to this function, based on the Win32 function QueryPerformanceCounter(). The resolution is typically better than one microsecond.". While I doubt it it might be interesting for our problem if it happen to be true. After the suggestions & having read the wiki I think we should indeed modifiy parts of date_time and template the timer class like mentionned. Should I try to give it a go ? Philippe On 5/15/06, Jeff Garland <jeff@crystalclearsoftware.com> wrote:
Carlo Wood wrote:
On Sun, May 14, 2006 at 05:09:28PM +0200, Silex wrote:
Would boost be interested by including this class in boost::timer ?
Even more so when it had microsecond precision.
I'm all ear for your suggestions / bugs / whatever fits it :)
It would be better when the object itself can be handled as variable (independent of it's internal structure).
For that to work best, there shouldn't be any 'double's in the internal structure. Two int's, one for seconds and one for microseconds, would be best, imho. There could be an accessor to get a rounded double in seconds, ie 'rseconds()' (I'd reserve 'seconds()' for returning the integer number of seconds.
I agree with this and it's been discussed before. Note I haven't looked at the new proposals, and can't till later, but I would like everyone interested in this topic to please look at:
http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?GDTL/Timer
This is a proposal for the current timer to be replaced with a core template that can use date_time types (including the microsecond clock type) and time durations. Please edit and update this page with additional thoughts.
Thx,
Jeff _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost