/home/coin/SVN-release/CoinAll-1.1.0/CoinUtils/src/CoinTime.hpp

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// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.

#ifndef _CoinTime_hpp
#define _CoinTime_hpp

// Uncomment the next three lines for thorough memory initialisation.
// #ifndef ZEROFAULT
// # define ZEROFAULT
// #endif

//#############################################################################

#include <ctime>
#if defined(_MSC_VER)
// Turn off compiler warning about long names
#  pragma warning(disable:4786)
#else
// MacOS-X and FreeBSD needs sys/time.h
#if defined(__MACH__) || defined (__FreeBSD__)
#include <sys/time.h>
#endif
#if !defined(__MSVCRT__)
#include <sys/resource.h>
#endif
#endif

//#############################################################################

#if defined(_MSC_VER)

#if 0 // change this to 1 if want to use the win32 API
#include <windows.h>
#ifdef small
/* for some unfathomable reason (to me) rpcndr.h (pulled in by windows.h) does a
   '#define small char' */
#undef small
#endif
#define TWO_TO_THE_THIRTYTWO 4294967296.0
#define DELTA_EPOCH_IN_SECS  11644473600.0
inline double CoinGetTimeOfDay()
{
  FILETIME ft;
 
  GetSystemTimeAsFileTime(&ft);
  double t = ft.dwHighDateTime * TWO_TO_THE_THIRTYTWO + ft.dwLowDateTime;
  t = t/10000000.0 - DELTA_EPOCH_IN_SECS;
  return t;
}
#else
#include <sys/types.h>
#include <sys/timeb.h>
inline double CoinGetTimeOfDay()
{
  struct _timeb timebuffer;
#pragma warning(disable:4996)
  _ftime( &timebuffer ); // C4996
#pragma warning(default:4996)
  return timebuffer.time + timebuffer.millitm/1000.0;
}
#endif

#else

#include <sys/time.h>

inline double CoinGetTimeOfDay()
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec + tv.tv_usec/1000000.0;
}

#endif // _MSC_VER

inline double CoinWallclockTime(double callType = 0)
{
    double callTime = CoinGetTimeOfDay();
    static const double firstCall = callType > 0 ? callType : callTime;
    return callType < 0 ? firstCall : callTime - firstCall;
}

//#############################################################################

static inline double CoinCpuTime()
{
  double cpu_temp;
#if defined(_MSC_VER) || defined(__MSVCRT__)
  unsigned int ticksnow;        /* clock_t is same as int */
  
  ticksnow = (unsigned int)clock();
  
  cpu_temp = (double)((double)ticksnow/CLOCKS_PER_SEC);
#else
  struct rusage usage;
# ifdef ZEROFAULT
  usage.ru_utime.tv_sec = 0 ;
  usage.ru_utime.tv_usec = 0 ;
# endif
  getrusage(RUSAGE_SELF,&usage);
  cpu_temp = usage.ru_utime.tv_sec;
  cpu_temp += 1.0e-6*((double) usage.ru_utime.tv_usec);
#endif
  return cpu_temp;
}

//#############################################################################
// On most systems SELF seems to include children threads, This is for when it doesn't
static inline double CoinCpuTimeJustChildren()
{
  double cpu_temp;
#if defined(_MSC_VER) || defined(__MSVCRT__)
  cpu_temp = 0.0;
#else
  struct rusage usage;
# ifdef ZEROFAULT
  usage.ru_utime.tv_sec = 0 ;
  usage.ru_utime.tv_usec = 0 ;
# endif
  getrusage(RUSAGE_CHILDREN,&usage);
  cpu_temp = usage.ru_utime.tv_sec;
  cpu_temp += 1.0e-6*((double) usage.ru_utime.tv_usec);
#endif
  return cpu_temp;
}
//#############################################################################

#include <fstream>

class CoinTimer
{
private:
   double start;
   double limit;
   double end;
#ifdef COIN_COMPILE_WITH_TRACING
   std::fstream* stream;
   bool write_stream;
#endif

private:
#ifdef COIN_COMPILE_WITH_TRACING
   inline bool evaluate(bool b_tmp) const {
      int i_tmp = b_tmp;
      if (stream) {
         if (write_stream)
            (*stream) << i_tmp << "\n";
         else 
            (*stream) >> i_tmp;
      }
      return i_tmp;
   }
   inline double evaluate(double d_tmp) const {
      if (stream) {
         if (write_stream)
            (*stream) << d_tmp << "\n";
         else 
            (*stream) >> d_tmp;
      }
      return d_tmp;
   }
#else
   inline bool evaluate(const bool b_tmp) const {
      return b_tmp;
   }
   inline double evaluate(const double d_tmp) const {
      return d_tmp;
   }
#endif   

public:
   CoinTimer() :
      start(0), limit(1e100), end(1e100)
#ifdef COIN_COMPILE_WITH_TRACING
      , stream(0), write_stream(true)
#endif
   {}

   CoinTimer(double lim) :
      start(CoinCpuTime()), limit(lim), end(start+lim)
#ifdef COIN_COMPILE_WITH_TRACING
      , stream(0), write_stream(true)
#endif
   {}

#ifdef COIN_COMPILE_WITH_TRACING

   CoinTimer(std::fstream* s, bool write) :
      start(0), limit(1e100), end(1e100),
      stream(s), write_stream(write) {}
   
   CoinTimer(double lim, std::fstream* s, bool w) :
      start(CoinCpuTime()), limit(lim), end(start+lim),
      stream(s), write_stream(w) {}
#endif
   
   inline void restart() { start=CoinCpuTime(); end=start+limit; }
   inline void reset() { restart(); }
   inline void reset(double lim) { limit=lim; restart(); }

   inline bool isPastPercent(double pct) const {
      return evaluate(start + limit * pct < CoinCpuTime());
   }
   inline bool isPast(double lim) const {
      return evaluate(start + lim < CoinCpuTime());
   }
   inline bool isExpired() const {
      return evaluate(end < CoinCpuTime());
   }

   inline double timeLeft() const {
      return evaluate(end - CoinCpuTime());
   }

   inline double timeElapsed() const {
      return evaluate(CoinCpuTime() - start);
   }

   inline void setLimit(double l) {
      limit = l;
      return;
   }
};

#endif

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