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_SHARED_MEM_CONTROLLER_H
17#define ECMASCRIPT_MEM_SHARED_MEM_CONTROLLER_H
18
19#include <chrono>
20#include <cmath>
21#include <limits>
22
23#include "ecmascript/base/gc_ring_buffer.h"
24#include "ecmascript/mem/mem_controller_utils.h"
25#include "ecmascript/mem/mem.h"
26
27namespace panda::ecmascript {
28class SharedHeap;
29
30using Clock = std::chrono::high_resolution_clock;
31using BytesAndDuration = std::pair<uint64_t, double>;
32
33class SharedMemController {
34public:
35    explicit SharedMemController(const SharedHeap* sheap):sheap_(sheap){};
36    SharedMemController() = default;
37    ~SharedMemController() = default;
38    NO_COPY_SEMANTIC(SharedMemController);
39    NO_MOVE_SEMANTIC(SharedMemController);
40
41    void RecordAllocationForIdle();
42    bool CheckLowAllocationUsageState() const;
43    void UpdateAllocationAfterGC();
44
45    double GetIdleSharedSpaceAllocationThroughputPerMS() const
46    {
47        return MemControllerUtils::CalculateAverageSpeed(recordedSharedSpaceAllocations_);
48    }
49
50    double GetLastGCOldSpaceObjectUsageRate() const
51    {
52        return lastGCOldSpaceObjectUsageRate_;
53    }
54
55    double GetLastGCObjectUsageRate() const
56    {
57        return lastGCObjectUsageRate_;
58    }
59
60private:
61    const SharedHeap *sheap_ {nullptr};
62
63    double allocTimeMsSharedIdle_ {0.0};
64    size_t sharedSpaceAllocSizeSinceIdle_ {0};
65    double lastGCObjectUsageRate_ {1.0f};
66    double lastGCOldSpaceObjectUsageRate_ {1.0f};
67    base::GCRingBuffer<BytesAndDuration, MemControllerUtils::LENGTH> recordedSharedSpaceAllocations_;
68};
69
70}  // namespace panda::ecmascript
71#endif  // ECMASCRIPT_MEM_SHARED_MEM_CONTROLLER_H
72