1/*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef ECMASCRIPT_MEM_MEM_CONTROLLER_UTILS_H
17#define ECMASCRIPT_MEM_MEM_CONTROLLER_UTILS_H
18
19#include <chrono>
20#include <cmath>
21#include <limits>
22
23#include "ecmascript/base/gc_ring_buffer.h"
24
25using BytesAndDuration = std::pair<uint64_t, double>;
26static inline BytesAndDuration MakeBytesAndDuration(uint64_t bytes, double duration)
27{
28    return std::make_pair(bytes, duration);
29}
30
31namespace panda::ecmascript {
32class MemControllerUtils {
33public:
34    static double GetSystemTimeInMs()
35    {
36        double currentTime =
37            std::chrono::duration<double>(std::chrono::high_resolution_clock::now().time_since_epoch()).count();
38        return currentTime * MILLISECOND_PER_SECOND;
39    }
40    static constexpr int LENGTH = 10;
41    static double CalculateAverageSpeed(const base::GCRingBuffer<BytesAndDuration, LENGTH> &buffer);
42    static double CalculateAverageSpeed(const base::GCRingBuffer<BytesAndDuration, LENGTH> &buffer,
43                                        const BytesAndDuration &initial, const double timeMs);
44private:
45    static constexpr int MILLISECOND_PER_SECOND = 1000;
46};
47} // namespace panda::ecmascript
48
49#endif // ECMASCRIPT_MEM_MEM_CONTROLLER_UTILS_H