Program Listing for File moving_average.hpp
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// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// 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 LIBSTATISTICS_COLLECTOR__MOVING_AVERAGE_STATISTICS__MOVING_AVERAGE_HPP_
#define LIBSTATISTICS_COLLECTOR__MOVING_AVERAGE_STATISTICS__MOVING_AVERAGE_HPP_
#include <cmath>
#include <algorithm>
#include <limits>
#include <mutex>
#include <numeric>
#include <type_traits>
#include "types.hpp"
#include "libstatistics_collector/visibility_control.hpp"
#include "rcpputils/thread_safety_annotations.hpp"
namespace libstatistics_collector
{
namespace moving_average_statistics
{
class MovingAverageStatistics
{
public:
LIBSTATISTICS_COLLECTOR_PUBLIC
MovingAverageStatistics() = default;
LIBSTATISTICS_COLLECTOR_PUBLIC
~MovingAverageStatistics() = default;
LIBSTATISTICS_COLLECTOR_PUBLIC
double Average() const RCPPUTILS_TSA_REQUIRES(mutex_);
LIBSTATISTICS_COLLECTOR_PUBLIC
double Max() const RCPPUTILS_TSA_REQUIRES(mutex_);
LIBSTATISTICS_COLLECTOR_PUBLIC
double Min() const RCPPUTILS_TSA_REQUIRES(mutex_);
LIBSTATISTICS_COLLECTOR_PUBLIC
double StandardDeviation() const RCPPUTILS_TSA_REQUIRES(mutex_);
LIBSTATISTICS_COLLECTOR_PUBLIC
StatisticData GetStatistics() const;
LIBSTATISTICS_COLLECTOR_PUBLIC
void Reset();
LIBSTATISTICS_COLLECTOR_PUBLIC
virtual void AddMeasurement(const double item);
LIBSTATISTICS_COLLECTOR_PUBLIC
uint64_t GetCount() const;
private:
mutable std::mutex mutex_;
double average_ RCPPUTILS_TSA_GUARDED_BY(mutex_) = 0;
double min_ RCPPUTILS_TSA_GUARDED_BY(mutex_) = std::numeric_limits<double>::max();
double max_ RCPPUTILS_TSA_GUARDED_BY(mutex_) = std::numeric_limits<double>::min();
double sum_of_square_diff_from_mean_ RCPPUTILS_TSA_GUARDED_BY(mutex_) = 0;
uint64_t count_ RCPPUTILS_TSA_GUARDED_BY(mutex_) = 0;
};
} // namespace moving_average_statistics
} // namespace libstatistics_collector
#endif // LIBSTATISTICS_COLLECTOR__MOVING_AVERAGE_STATISTICS__MOVING_AVERAGE_HPP_