Epetra_Time.cpp

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//               Epetra: Linear Algebra Services Package
//                 Copyright 2011 Sandia Corporation
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#include "Epetra_Time.h"

#ifdef EPETRA_MPI
#include <time.h>
#endif
#ifdef EPETRA_HAVE_OMP
#include <omp.h>
#endif

//=============================================================================
Epetra_Time::Epetra_Time(const Epetra_Comm& Comm)
  : StartTime_(0.0),
    Comm_(&Comm)
{
  StartTime_ = WallTime();
}
//=============================================================================
Epetra_Time::Epetra_Time(const Epetra_Time& Time)
  : StartTime_(Time.StartTime_),
    Comm_(Time.Comm_)
{
}
//=============================================================================
Epetra_Time::~Epetra_Time(void)
{
}
//=============================================================================
double Epetra_Time::WallTime(void) const
{
#ifdef EPETRA_MPI

  int mpiInitialized;
  MPI_Initialized(&mpiInitialized);

  if( mpiInitialized ) {

    return(MPI_Wtime());

  }
  else {

    clock_t start;

    start = clock();
    return( (double)( start ) / CLOCKS_PER_SEC );

  }

#else

#ifdef EPETRA_HAVE_OMP
       return(omp_get_wtime());
#else
#if ICL || defined(_WIN32)

   clock_t start;
   //double duration;

   start = clock();
  return (double)( start ) / CLOCKS_PER_SEC;

#else

#ifndef MINGW
   struct timeval tp;
   static long start=0, startu;
   if (!start)
   {
      gettimeofday(&tp, NULL);
      start = tp.tv_sec;
      startu = tp.tv_usec;
      return(0.0);
   }
   gettimeofday(&tp, NULL);
   return( ((double) (tp.tv_sec - start)) + (tp.tv_usec-startu)/1000000.0 );
#else
   return( (double) clock() / CLOCKS_PER_SEC );
#endif // MINGW

#endif // ICL || WIN32

#endif // EPETRA_HAVE_OMP
#endif // EPETRA_MPI

}
//=============================================================================
void Epetra_Time::ResetStartTime(void)
{
  StartTime_ = WallTime();
  return;
}
//=============================================================================
double Epetra_Time::ElapsedTime(void) const
{
  return(WallTime()-StartTime_);
}