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profiler.h

00001 /**********************************************************************
00002  * $Id: profiler.h 2556 2009-06-06 22:22:28Z strk $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************/
00015 
00016 #ifndef GEOS_PROFILER_H
00017 #define GEOS_PROFILER_H
00018 
00019 #include <geos/export.h>
00020 
00021 /* For MingW builds with __STRICT_ANSI__ (-ansi) */
00022 #if defined(__MINGW32__)
00023 /* Allow us to check for presence of gettimeofday in MingW */ 
00024 #include <config.h>
00025 
00026 #include <sys/time.h>
00027 extern "C" {
00028   extern _CRTIMP void __cdecl   _tzset (void);
00029   __MINGW_IMPORT int    _daylight;
00030   __MINGW_IMPORT long   _timezone;
00031   __MINGW_IMPORT char   *_tzname[2];
00032 }
00033 #endif
00034  
00035 #if defined(_MSC_VER) || defined(__MINGW32__) && !defined(HAVE_GETTIMEOFDAY)
00036 #include <geos/timeval.h>
00037 #else
00038 #include <sys/time.h>
00039 #endif
00040 
00041 #include <map>
00042 #include <memory>
00043 #include <iostream>
00044 #include <string>
00045 #include <vector>
00046 
00047 #ifndef PROFILE
00048 #define PROFILE 0
00049 #endif
00050 
00051 namespace geos {
00052 namespace util {
00053 
00054 
00055 /*
00056  * \class Profile utils.h geos.h
00057  *
00058  * \brief Profile statistics
00059  */
00060 class GEOS_DLL Profile {
00061 public:
00063         Profile(std::string name);
00064 
00066         ~Profile();
00067 
00069         void start() {
00070                 gettimeofday(&starttime, NULL);
00071         }
00072 
00074         void stop()
00075         {
00076                 gettimeofday(&stoptime, NULL);
00077                 double elapsed = 1000000*(stoptime.tv_sec-starttime.tv_sec)+
00078                         (stoptime.tv_usec-starttime.tv_usec);
00079 
00080                 timings.push_back(elapsed);
00081                 totaltime += elapsed;
00082                 if ( timings.size() == 1 ) max = min = elapsed;
00083                 else
00084                 {
00085                         if ( elapsed > max ) max = elapsed;
00086                         if ( elapsed < min ) min = elapsed;
00087                 }
00088                 avg = totaltime / timings.size();
00089         }
00090 
00092         double getMax() const;
00093 
00095         double getMin() const;
00096 
00098         double getTot() const;
00099 
00101         double getAvg() const;
00102 
00104         size_t getNumTimings() const;
00105 
00107         std::string name;
00108 
00109 
00110 private:
00111 
00112         /* \brief current start and stop times */
00113         struct timeval starttime, stoptime;
00114 
00115         /* \brief actual times */
00116         std::vector<double> timings;
00117 
00118         /* \brief total time */
00119         double totaltime;
00120 
00121         /* \brief max time */
00122         double max;
00123 
00124         /* \brief max time */
00125         double min;
00126 
00127         /* \brief max time */
00128         double avg;
00129 
00130 };
00131 
00132 /*
00133  * \class Profiler utils.h geos.h
00134  *
00135  * \brief Profiling class
00136  *
00137  */
00138 class GEOS_DLL Profiler {
00139 
00140 public:
00141 
00142         Profiler();
00143         ~Profiler();
00144 
00150         static Profiler *instance(void);
00151 
00157         void start(std::string name);
00158 
00164         void stop(std::string name);
00165 
00167         Profile *get(std::string name);
00168 
00169         std::map<std::string, Profile *> profs;
00170 };
00171 
00172 
00174 std::ostream& operator<< (std::ostream& os, const Profile&);
00175 
00177 std::ostream& operator<< (std::ostream& os, const Profiler&);
00178 
00179 } // namespace geos::util
00180 } // namespace geos
00181 
00182 #endif // ndef GEOS_PROFILER_H
00183 
00184 /**********************************************************************
00185  * $Log$
00186  * Revision 1.8  2006/06/12 11:29:23  strk
00187  * unsigned int => size_t
00188  *
00189  * Revision 1.7  2006/03/06 19:40:47  strk
00190  * geos::util namespace. New GeometryCollection::iterator interface, many cleanups.
00191  *
00192  * Revision 1.6  2006/03/03 10:46:21  strk
00193  * Removed 'using namespace' from headers, added missing headers in .cpp files, removed useless includes in headers (bug#46)
00194  *
00195  * Revision 1.5  2005/02/01 14:18:04  strk
00196  * Made profiler start/stop inline
00197  *
00198  * Revision 1.4  2004/12/03 16:21:07  frank
00199  * dont try for sys/time.h with MSVC
00200  *
00201  * Revision 1.3  2004/11/30 16:44:16  strk
00202  * Added gettimeofday implementation for win32, curtesy of Wu Yongwei.
00203  *
00204  * Revision 1.2  2004/11/04 08:49:13  strk
00205  * Unlinked new documentation.
00206  *
00207  * Revision 1.1  2004/11/01 16:43:04  strk
00208  * Added Profiler code.
00209  * Temporarly patched a bug in DoubleBits (must check drawbacks).
00210  * Various cleanups and speedups.
00211  *
00212  **********************************************************************/

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