Clock.ih

#include "DGtal/base/Clock.h"

using namespace std;
using namespace DGtal;

// class Clock

// Standard services - public :

// -------------------------- timing services -------------------------------



  
inline
DGtal::Clock::Clock()
{
}


//- Starts a clock.
inline
void 
DGtal::Clock::startClock()
{

#if ( (defined(WIN32)) )
  myFirstTick = clock();
  if (myFirstTick == (clock_t) -1)
    {
      cerr << "[Clock::startClock] Erreur sur 'clock()'." << endl;
    }
#else
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
  clock_serv_t cclock;
  mach_timespec_t mts;
  host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
  clock_get_time(cclock, &mts);
  mach_port_deallocate(mach_task_self(), cclock);
  myTimerStart.tv_sec = mts.tv_sec;
  myTimerStart.tv_nsec = mts.tv_nsec;
#else
  clock_gettime(CLOCK_REALTIME, &myTimerStart);
#endif
#endif
}


//- @return the time (in ms) since the last 'startClock()'.
inline
double 
DGtal::Clock::stopClock()
{

#if ( (defined(WIN32)) )
  clock_t last_tick = clock();
  if (last_tick == (clock_t) -1)
    {
      cerr << "[Clock::stopClock] Erreur sur 'clock()'." << endl;
    }
  return (double) ((double) 1000.0 * (double)(last_tick - myFirstTick)
                 / (double) CLOCKS_PER_SEC);
#else
  struct timespec current;

#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
  clock_serv_t cclock;
  mach_timespec_t mts;
  host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
  clock_get_time(cclock, &mts);
  mach_port_deallocate(mach_task_self(), cclock);
  current.tv_sec = mts.tv_sec;
  current.tv_nsec = mts.tv_nsec;
#else
  clock_gettime(CLOCK_REALTIME, &current); //Linux gettime
#endif


  return (( current.tv_sec - myTimerStart.tv_sec) *1000 +
          ( current.tv_nsec - myTimerStart.tv_nsec)/1000000.0);  
#endif

}



inline
DGtal::Clock::~Clock()
{
}



// Interface - public :

inline
void 
DGtal::Clock::selfDisplay( std::ostream & out ) const
{
  out << "[Clock]";
}

inline
bool 
DGtal::Clock::isValid() const
{
  return true;
}