ibrcommon/ibrcommon/TimeMeasurement.h

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/*
 * TimeMeasurement.h
 *
 * Copyright 2011 Johannes Morgenroth, IBR, TU Braunschweig
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef TIMEMEASUREMENT_H_
#define TIMEMEASUREMENT_H_

#include <time.h>
#include <iostream>
#include <sys/types.h>
#include <stdint.h>

namespace ibrcommon
{
        class TimeMeasurement
        {
        public:
                TimeMeasurement();
                virtual ~TimeMeasurement();

                void start();
                void stop();

                u_int64_t getNanoseconds() const;
                float getMicroseconds() const;
                float getMilliseconds() const;
                float getSeconds() const;

                friend std::ostream &operator<<(std::ostream &stream, const TimeMeasurement &measurement);

                static std::ostream& format(std::ostream &stream, const float value);

        private:
                static int64_t timespecDiff(const struct timespec *timeA_p, const struct timespec *timeB_p);
                static int64_t timespecDiff(const uint64_t &stop, const uint64_t &start);

                struct timespec _start;
                struct timespec _end;

                uint64_t _uint64_start;
                uint64_t _uint64_end;
        };
}

#endif /* TIMEMEASUREMENT_H_ */