G4Timer.cc

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//
//
//
// 
// ----------------------------------------------------------------------
// class G4Timer
//
// Implementation
// 29.04.97 G.Cosmo Added timings for Windows systems

#include "G4Timer.hh"
#include "G4ios.hh"

#include <iomanip>

// Global error function
#include "G4ExceptionSeverity.hh"
void G4Exception(const char* originOfException,
                 const char* exceptionCode,
                             G4ExceptionSeverity severity,
                 const char* comments);

#if defined(IRIX6_2)
#  if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE_EXTENDED==1)
#    define __vfork vfork
#  endif
#endif

#ifdef WIN32
#  include <sys/types.h>
#  include <windows.h>

   // extract milliseconds time unit
   G4int sysconf(G4int a)
   {
     if( a == _SC_CLK_TCK ) return 1000;
     else return 0;
   }

   static clock_t filetime2msec( FILETIME* t )
   {
     return (clock_t)((((G4float)t->dwHighDateTime)*429496.7296)+
             (((G4float)t->dwLowDateTime)*.0001) );
   }


   clock_t times(struct tms * t)
   {
     FILETIME      ct = {0,0}, et = {0,0}, st = {0,0}, ut = {0,0}, rt = {0,0};
     SYSTEMTIME realtime;

     GetSystemTime( &realtime );
     SystemTimeToFileTime( &realtime, &rt ); // get real time in 10^-9 sec
     if( t != 0 )
     {
       GetProcessTimes( GetCurrentProcess(), &ct, &et, &st, &ut);
         // get process time in 10^-9 sec
       t->tms_utime = t->tms_cutime = filetime2msec(&ut);
       t->tms_stime = t->tms_cstime = filetime2msec(&st);
     }
     return filetime2msec(&rt);
   }
#endif /* WIN32 */

// Print timer status on std::ostream
//
std::ostream& operator << (std::ostream& os, const G4Timer& t)
{
  // so fixed doesn't propagate
  std::stringstream ss;
  ss << std::fixed;
  if (t.IsValid())
  {
    ss << "User=" << t.GetUserElapsed()
       << "s Real=" << t.GetRealElapsed()
       << "s Sys=" << t.GetSystemElapsed() << "s";
#ifdef G4MULTITHREADED
    // avoid possible FPE error
    if(t.GetRealElapsed() > 1.0e-6)
    {
      G4double cpu_util = (t.GetUserElapsed()+t.GetSystemElapsed()) /
                           t.GetRealElapsed() * 100.0;
      ss << std::setprecision(1);
      ss << " [Cpu=" << std::setprecision(1) << cpu_util << "%]";
    }
#endif
  }
  else
  {
    ss << "User=****s Real=****s Sys=****s";
  }
  os << ss.str();

  return os;
}

G4Timer::G4Timer()
  : fValidTimes(false)
{
}

G4double G4Timer::GetRealElapsed() const
{
  if (!fValidTimes)
  {
    G4Exception("G4Timer::GetRealElapsed()", "InvalidCondition",
                FatalException, "Timer not stopped or times not recorded!");
  }
  std::chrono::duration<G4double> diff=fEndRealTime-fStartRealTime;
  return diff.count();
}


G4double G4Timer::GetSystemElapsed() const
{
  if (!fValidTimes)
  {
    G4Exception("G4Timer::GetSystemElapsed()", "InvalidCondition",
                FatalException, "Timer not stopped or times not recorded!");
  }
  G4double diff=fEndTimes.tms_stime-fStartTimes.tms_stime;
  return diff/sysconf(_SC_CLK_TCK);
}

G4double G4Timer::GetUserElapsed() const
{
  if (!fValidTimes)
  {
    G4Exception("G4Timer::GetUserElapsed()", "InvalidCondition",
                FatalException, "Timer not stopped or times not recorded");
  }
  G4double diff=fEndTimes.tms_utime-fStartTimes.tms_utime;
  return diff/sysconf(_SC_CLK_TCK);
}