/*************************************************************************** * blitz/Timer.h Timer class, for use in benchmarking * * $Id: timer.h,v 1.1.1.1 1999-04-09 17:58:59 ansari Exp $ * * Copyright (C) 1997,1998 Todd Veldhuizen * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Suggestions: blitz-suggest@cybervision.com * Bugs: blitz-bugs@cybervision.com * * For more information, please see the Blitz++ Home Page: * http://seurat.uwaterloo.ca/blitz/ * *************************************************************************** * $Log: not supported by cvs2svn $ * Revision 1.4 1998/03/14 00:04:47 tveldhui * 0.2-alpha-05 * * Revision 1.3 1997/07/16 14:51:20 tveldhui * Update: Alpha release 0.2 (Arrays) * * Revision 1.2 1997/01/24 14:42:00 tveldhui * Periodic RCS update * */ // This class is not portable to non System V platforms. // It will need to be rewritten for Windows, NT, Mac. // NEEDS_WORK #ifndef BZ_TIMER_H #define BZ_TIMER_H #ifndef BZ_BLITZ_H #include #endif #ifdef BZ_HAVE_RUSAGE #include #else #include #endif BZ_NAMESPACE(blitz) class Timer { public: Timer() { state_ = uninitialized; } void start() { state_ = running; t1_ = systemTime(); } void stop() { t2_ = systemTime(); BZPRECONDITION(state_ == running); state_ = stopped; } long double elapsedSeconds() { BZPRECONDITION(state_ == stopped); return t2_ - t1_; } private: Timer(Timer&) { } void operator=(Timer&) { } long double systemTime() { #ifdef BZ_HAVE_RUSAGE getrusage(RUSAGE_SELF, &resourceUsage_); double seconds = resourceUsage_.ru_utime.tv_sec + resourceUsage_.ru_stime.tv_sec; double micros = resourceUsage_.ru_utime.tv_usec + resourceUsage_.ru_stime.tv_usec; return seconds + micros/1.0e6; #else return clock() / (long double) CLOCKS_PER_SEC; #endif } enum { uninitialized, running, stopped } state_; #ifdef BZ_HAVE_RUSAGE struct rusage resourceUsage_; #endif long double t1_, t2_; }; BZ_NAMESPACE_END #endif // BZ_TIMER_H