Bugs item #1520489, was opened at 2006-07-11 15:41 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1520489&group_id=7586 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: timer Group: None Status: Open Resolution: None Priority: 5 Submitted By: Sukhonosenko Kirill (skv) Assigned to: Beman Dawes (beman_dawes) Summary: significantly different timer class behaviour on Win and Lin Initial Comment: clock() function used in implementation of boost::timer behaves differently on Windows (MS XP Pro, MSVC 7.1) and Linux (FC3, gcc 3.4.2). Windows: clock measures elapsed time (wall clock). And this comply with boost::timer interface description. Example: boost::timer t; double sec = 1; ::Sleep(sec*1000); double d = t.elapsed(); assert(abs(d-sec) < 0.1); Linux: clock() function returnes process CPU time. The above code will fail. This difference makes boost::timer a bad candidate for cross-platform development. I can propose alternative implementation with simalar right behaviour. ------------------------------------------ #ifndef _Timer_h_dlfkgh9384ytdflg9045uhy0823475mgd385uyn0v68uy c0n4c5 #define _Timer_h_dlfkgh9384ytdflg9045uhy0823475mgd385uyn0v68uy c0n4c5 #include <time.h> namespace Timer { /* Measures intervals of wall clock time, but not process CPU time. Resolution & accuracy depends on time function abilities. */ class timer { public: // setup reference time point timer() { restart(); } // reset reference time point void restart() { ::time(&m_ref_time); } // report difference between current time and reference point double elapsed() const { time_t curr_time; ::time(&curr_time); double diff = difftime (curr_time, m_ref_time); return diff; } // forbidden private: timer(const timer &); timer & operator=(const timer &); private: time_t m_ref_time; }; } // namespace Timer #endif //_Timer_h_dlfkgh9384ytdflg9045uhy0823475mgd385 uyn0v68uyc0n4c5 ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1520489&group_id=7586 ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Boost-bugs mailing list Boost-bugs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs