/*

 * Copyright (C) 2020 The Android Open Source Project

 *

 * 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 SRC_PROFILING_MEMORY_LOG_HISTOGRAM_H_

#define SRC_PROFILING_MEMORY_LOG_HISTOGRAM_H_

#include <stddef.h>

#include <array>

#include <cinttypes>

#include <utility>

#include <vector>

namespace perfetto {

namespace profiling {

class LogHistogram {

 public:

  static const uint64_t kMaxBucket;

  static constexpr size_t kBuckets = 20;

  void Add(uint64_t value) { values_[GetBucket(value)]++; }

  std::vector<std::pair<uint64_t, uint64_t>> GetData() const;

 private:

  size_t GetBucket(uint64_t value);

  std::array<uint64_t, kBuckets> values_ = {};

};

}  // namespace profiling

}  // namespace perfetto

#endif  // SRC_PROFILING_MEMORY_LOG_HISTOGRAM_H_