# CoinTime.hpp

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    00001 /* $Id: CoinTime.hpp 1372 2011-01-03 23:31:00Z lou $ */
    00002 // Copyright (C) 2002, International Business Machines
    00003 // Corporation and others.  All Rights Reserved.
    00004 // This code is licensed under the terms of the Eclipse Public License (EPL).
    00005
    00006 #ifndef _CoinTime_hpp
    00007 #define _CoinTime_hpp
    00008
    00009 // Uncomment the next three lines for thorough memory initialisation.
    00010 // #ifndef ZEROFAULT
    00011 // # define ZEROFAULT
    00012 // #endif
    00013
    00014 //#############################################################################
    00015
    00016 #include <ctime>
    00017 #if defined(_MSC_VER)
    00018 // Turn off compiler warning about long names
    00019 #  pragma warning(disable:4786)
    00020 #else
    00021 // MacOS-X and FreeBSD needs sys/time.h
    00022 #if defined(__MACH__) || defined (__FreeBSD__)
    00023 #include <sys/time.h>
    00024 #endif
    00025 #if !defined(__MSVCRT__)
    00026 #include <sys/resource.h>
    00027 #endif
    00028 #endif
    00029
    00030 //#############################################################################
    00031
    00032 #if defined(_MSC_VER)
    00033
    00034 #if 0 // change this to 1 if want to use the win32 API
    00035 #include <windows.h>
    00036 #ifdef small
    00037 /* for some unfathomable reason (to me) rpcndr.h (pulled in by windows.h) does a
    00038    '#define small char' */
    00039 #undef small
    00040 #endif
    00041 #define TWO_TO_THE_THIRTYTWO 4294967296.0
    00042 #define DELTA_EPOCH_IN_SECS  11644473600.0
    00043 inline double CoinGetTimeOfDay()
    00044 {
    00045   FILETIME ft;
    00046
    00047   GetSystemTimeAsFileTime(&ft);
    00048   double t = ft.dwHighDateTime * TWO_TO_THE_THIRTYTWO + ft.dwLowDateTime;
    00049   t = t/10000000.0 - DELTA_EPOCH_IN_SECS;
    00050   return t;
    00051 }
    00052 #else
    00053 #include <sys/types.h>
    00054 #include <sys/timeb.h>
    00055 inline double CoinGetTimeOfDay()
    00056 {
    00057   struct _timeb timebuffer;
    00058 #pragma warning(disable:4996)
    00059   _ftime( &timebuffer ); // C4996
    00060 #pragma warning(default:4996)
    00061   return timebuffer.time + timebuffer.millitm/1000.0;
    00062 }
    00063 #endif
    00064
    00065 #else
    00066
    00067 #include <sys/time.h>
    00068
    00069 inline double CoinGetTimeOfDay()
    00070 {
    00071     struct timeval tv;
    00072     gettimeofday(&tv, NULL);
    00073     return static_cast<double>(tv.tv_sec) + static_cast<int>(tv.tv_usec)/1000000.0;
    00074 }
    00075
    00076 #endif // _MSC_VER
    00077
    00086 inline double CoinWallclockTime(double callType = 0)
    00087 {
    00088     double callTime = CoinGetTimeOfDay();
    00089     static const double firstCall = callType > 0 ? callType : callTime;
    00090     return callType < 0 ? firstCall : callTime - firstCall;
    00091 }
    00092
    00093 //#############################################################################
    00094
    00095 //#define HAVE_SDK // if SDK under Win32 is installed, for CPU instead of elapsed time under Win
    00096 #ifdef HAVE_SDK
    00097 #include <windows.h>
    00098 #ifdef small
    00099 /* for some unfathomable reason (to me) rpcndr.h (pulled in by windows.h) does a
    00100    '#define small char' */
    00101 #undef small
    00102 #endif
    00103 #define TWO_TO_THE_THIRTYTWO 4294967296.0
    00104 #endif
    00105
    00106 static inline double CoinCpuTime()
    00107 {
    00108   double cpu_temp;
    00109 #if defined(_MSC_VER) || defined(__MSVCRT__)
    00110 #ifdef HAVE_SDK
    00111   FILETIME creation;
    00112   FILETIME exit;
    00113   FILETIME kernel;
    00114   FILETIME user;
    00115   GetProcessTimes(GetCurrentProcess(), &creation, &exit, &kernel, &user);
    00116   double t = user.dwHighDateTime * TWO_TO_THE_THIRTYTWO + user.dwLowDateTime;
    00117   return t/10000000.0;
    00118 #else
    00119   unsigned int ticksnow;        /* clock_t is same as int */
    00120   ticksnow = (unsigned int)clock();
    00121   cpu_temp = (double)((double)ticksnow/CLOCKS_PER_SEC);
    00122 #endif
    00123
    00124 #else
    00125   struct rusage usage;
    00126 # ifdef ZEROFAULT
    00127   usage.ru_utime.tv_sec = 0 ;
    00128   usage.ru_utime.tv_usec = 0 ;
    00129 # endif
    00130   getrusage(RUSAGE_SELF,&usage);
    00131   cpu_temp = static_cast<double>(usage.ru_utime.tv_sec);
    00132   cpu_temp += 1.0e-6*(static_cast<double> (usage.ru_utime.tv_usec));
    00133 #endif
    00134   return cpu_temp;
    00135 }
    00136
    00137 //#############################################################################
    00138
    00139
    00140
    00141 static inline double CoinSysTime()
    00142 {
    00143   double sys_temp;
    00144 #if defined(_MSC_VER) || defined(__MSVCRT__)
    00145   sys_temp = 0.0;
    00146 #else
    00147   struct rusage usage;
    00148 # ifdef ZEROFAULT
    00149   usage.ru_utime.tv_sec = 0 ;
    00150   usage.ru_utime.tv_usec = 0 ;
    00151 # endif
    00152   getrusage(RUSAGE_SELF,&usage);
    00153   sys_temp = static_cast<double>(usage.ru_stime.tv_sec);
    00154   sys_temp += 1.0e-6*(static_cast<double> (usage.ru_stime.tv_usec));
    00155 #endif
    00156   return sys_temp;
    00157 }
    00158
    00159 //#############################################################################
    00160 // On most systems SELF seems to include children threads, This is for when it doesn't
    00161 static inline double CoinCpuTimeJustChildren()
    00162 {
    00163   double cpu_temp;
    00164 #if defined(_MSC_VER) || defined(__MSVCRT__)
    00165   cpu_temp = 0.0;
    00166 #else
    00167   struct rusage usage;
    00168 # ifdef ZEROFAULT
    00169   usage.ru_utime.tv_sec = 0 ;
    00170   usage.ru_utime.tv_usec = 0 ;
    00171 # endif
    00172   getrusage(RUSAGE_CHILDREN,&usage);
    00173   cpu_temp = static_cast<double>(usage.ru_utime.tv_sec);
    00174   cpu_temp += 1.0e-6*(static_cast<double> (usage.ru_utime.tv_usec));
    00175 #endif
    00176   return cpu_temp;
    00177 }
    00178 //#############################################################################
    00179
    00180 #include <fstream>
    00181
    00197 class CoinTimer
    00198 {
    00199 private:
    00201    double start;
    00203    double limit;
    00204    double end;
    00205 #ifdef COIN_COMPILE_WITH_TRACING
    00206    std::fstream* stream;
    00207    bool write_stream;
    00208 #endif
    00209
    00210 private:
    00211 #ifdef COIN_COMPILE_WITH_TRACING
    00212    inline bool evaluate(bool b_tmp) const {
    00213       int i_tmp = b_tmp;
    00214       if (stream) {
    00215          if (write_stream)
    00216             (*stream) << i_tmp << "\n";
    00217          else
    00218             (*stream) >> i_tmp;
    00219       }
    00220       return i_tmp;
    00221    }
    00222    inline double evaluate(double d_tmp) const {
    00223       if (stream) {
    00224          if (write_stream)
    00225             (*stream) << d_tmp << "\n";
    00226          else
    00227             (*stream) >> d_tmp;
    00228       }
    00229       return d_tmp;
    00230    }
    00231 #else
    00232    inline bool evaluate(const bool b_tmp) const {
    00233       return b_tmp;
    00234    }
    00235    inline double evaluate(const double d_tmp) const {
    00236       return d_tmp;
    00237    }
    00238 #endif
    00239
    00240 public:
    00242    CoinTimer() :
    00243       start(0), limit(1e100), end(1e100)
    00244 #ifdef COIN_COMPILE_WITH_TRACING
    00245       , stream(0), write_stream(true)
    00246 #endif
    00247    {}
    00248
    00250    CoinTimer(double lim) :
    00251       start(CoinCpuTime()), limit(lim), end(start+lim)
    00252 #ifdef COIN_COMPILE_WITH_TRACING
    00253       , stream(0), write_stream(true)
    00254 #endif
    00255    {}
    00256
    00257 #ifdef COIN_COMPILE_WITH_TRACING
    00258
    00260    CoinTimer(std::fstream* s, bool write) :
    00261       start(0), limit(1e100), end(1e100),
    00262       stream(s), write_stream(write) {}
    00263
    00266    CoinTimer(double lim, std::fstream* s, bool w) :
    00267       start(CoinCpuTime()), limit(lim), end(start+lim),
    00268       stream(s), write_stream(w) {}
    00269 #endif
    00270
    00272    inline void restart() { start=CoinCpuTime(); end=start+limit; }
    00274    inline void reset() { restart(); }
    00276    inline void reset(double lim) { limit=lim; restart(); }
    00277
    00280    inline bool isPastPercent(double pct) const {
    00281       return evaluate(start + limit * pct < CoinCpuTime());
    00282    }
    00285    inline bool isPast(double lim) const {
    00286       return evaluate(start + lim < CoinCpuTime());
    00287    }
    00290    inline bool isExpired() const {
    00291       return evaluate(end < CoinCpuTime());
    00292    }
    00293
    00295    inline double timeLeft() const {
    00296       return evaluate(end - CoinCpuTime());
    00297    }
    00298
    00300    inline double timeElapsed() const {
    00301       return evaluate(CoinCpuTime() - start);
    00302    }
    00303
    00304    inline void setLimit(double l) {
    00305       limit = l;
    00306       return;
    00307    }
    00308 };
    00309
    00310 #endif

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