StopWatch.h

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#ifndef CARMA_UTIL_STOPWATCH_H
#define CARMA_UTIL_STOPWATCH_H

#include <string>
#include <time.h>

namespace carma {
namespace util {

class StopWatch {
public:
    enum ClockType {
      WALL_CLOCK = 0,
      CPU_TIME   = 1
    };

    explicit StopWatch( );

    explicit StopWatch( ClockType type );

    explicit StopWatch( const ::std::string & name );

    StopWatch( ClockType             type,
               const ::std::string & name );

    ~StopWatch();

    void start();

    void stop();
    
    bool isRunning() const;

    double getElapsedTime() const;

    double getCumulativeElapsedTime(bool reset=false);

protected:
    const ClockType     type_;
    const ::std::string name_;
    
    double startTime_;
    double elapsedTime_;
    double cumulativeElapsedTime_;
    bool running_;
    struct timespec scratchTimeSpec_;
};

} // end namespace util
} // end namespace carma

#endif //CARMA_UTIL_STOPWATCH_H