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/Go4ProfileTimer/TGo4ProfileTimer.h

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//---------------------------------------------------------------
//        Go4 Release Package v2.10-5 (build 21005) 
//                      03-Nov-2005
//---------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//       Experiment Data Processing at DVEE department, GSI
//---------------------------------------------------------------
//
//Copyright (C) 2000- Gesellschaft f. Schwerionenforschung, GSI
//                    Planckstr. 1, 64291 Darmstadt, Germany
//Contact:            http://go4.gsi.de
//----------------------------------------------------------------
//This software can be used under the license agreements as stated
//in Go4License.txt file which is part of the distribution.
//----------------------------------------------------------------
#ifndef PROFILE_TIMER_H
#define PROFILE_TIMER_H

#include "TObject.h"

#ifndef __CINT__
#include <sys/time.h>
#include <sys/resource.h>
#else
struct timeval;
struct rusage;
#endif

#define ONE_SECOND_IN_USECS 1000000L

class TGo4ProfileTimer {
  public:

    class TGo4ElapsedTime {
       public:
         TGo4ElapsedTime();
         virtual ~TGo4ElapsedTime() {}

       Double_t fdRealTime;
       Double_t fdUserTime;
       Double_t fdSystemTime;
     };


  typedef rusage Rusage;
  typedef TGo4ProfileTimer::TGo4ElapsedTime TGo4ElapsedTime;

  // = Initialization and termination methods.
  TGo4ProfileTimer (void);
  // Default constructor.

  virtual ~TGo4ProfileTimer (void);
  // Shutdown the timer.

  // = Timer methods.
  Int_t Start(void);
  // Activate the timer.

  Int_t Stop(void);
  // Stop the timer.

  // = Resource utilization methods.
  Int_t ElapsedTime(TGo4ElapsedTime &et);
  // Compute the time elapsed since <start>.

  void ElapsedRusage (TGo4ProfileTimer::Rusage &rusage);
  // Compute the amount of resource utilization since the start time.

  void GetRusage (TGo4ProfileTimer::Rusage &rusage);
  // Return the resource utilization (don't recompute it).

  void Dump (void) const;
  // Dump the state of an object.

  void Resume (void);
  // Print the timing.

  void Memory (void);
  // Print the memory consumption etc.

private:
  void ComputeTimes (TGo4ElapsedTime &et);
  // Compute how much time has elapsed.

  TGo4ProfileTimer::Rusage fxBeginUsage;
  // Keep track of the starting resource utilization.

  TGo4ProfileTimer::Rusage fxEndUsage;
  // Keep track of the ending resource utilization.

  TGo4ProfileTimer::Rusage fxLastUsage;
  // Keep track of the last rusage for incremental timing.

  void Subtract (timeval &tdiff, timeval &t0, timeval &t1);
  // Substract two timestructs and store their difference.

  timeval fxBeginTime;
  // Keep track of the beginning time.

  timeval fxEndTime;
  // Keep track of the ending time.

  timeval fxLastTime;
  // Keep track of the last time for incremental timing.

  ClassDef(TGo4ProfileTimer, 1)
};

#endif

//----------------------------END OF GO4 SOURCE FILE ---------------------

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