DurationTracker.cpp

#include "DurationTracker.h"

#include <iomanip>
#include <chrono>
#include <string>
#include <sstream>

using namespace std;
using namespace chrono;

// Function Name:   DurationTracker: Default Constructor
// Purpose:         Creates a new instance of DurationTracker.
// Parameters:      none
// Returns:         none
// Pre-conditions:  none
// Post-conditions: none
DurationTracker::DurationTracker ()
{
    _startTime = high_resolution_clock::now ();
    _endTime = high_resolution_clock::now ();
    _timeElapsed = 0;
}

// Function Name:   DurationTracker: Deconstructor
// Purpose:         Deconstructs the instances of this class when they leave scope
// Parameters:      none
// Returns:         none
// Pre-conditions:  none
// Post-conditions: none
DurationTracker::~DurationTracker () = default;

// Function Name:   start
// Purpose:         Records the current time for comparison later.
// Parameters:      none
// Returns:         none
// Pre-conditions:  none
// Post-conditions: none
void DurationTracker::start ()
{
    _startTime = high_resolution_clock::now ();
}

// Function Name:   end
// Purpose:         Records the ending time and determines the duration between the start and end.
// Parameters:      none
// Returns:         The duration between the start and end in microseconds.
// Pre-conditions:  none
// Post-conditions: none
void DurationTracker::stop ()
{
    _endTime = high_resolution_clock::now ();

    process ();
}

void DurationTracker::process ()
{
    duration<double, micro> time = _endTime - _startTime;
    _timeElapsed = time.count ();
}

// Function Name:   results
// Purpose:         Provides the formatted duration.
// Parameters:      none
// Returns:         The duration the duration in microseconds or milliseconds depending on the size.
// Pre-conditions:  none
// Post-conditions: none
string DurationTracker::results () const
{
    stringstream ss;

    ss << _timeElapsed << " " << "microseconds";

    return ss.str ();
}

// Function Name:   getTimeElapsed
// Purpose:         Gets the elapsed time for the caller.
// Parameters:      none
// Returns:         The elapsed time as a long.
// Pre-conditions:  none
// Post-conditions: none
double DurationTracker::getTimeElapsed () const
{
    return _timeElapsed;
}