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 OHOS_HDI_POWER_V1_2_HIBERNATE_H
17#define OHOS_HDI_POWER_V1_2_HIBERNATE_H
18
19#include <cstdint>
20#include <atomic>
21#include <mutex>
22
23namespace OHOS {
24namespace HDI {
25namespace Power {
26namespace V1_2 {
27class Hibernate {
28public:
29    Hibernate(const Hibernate &) = delete;
30    Hibernate(const Hibernate &&) = delete;
31    Hibernate &operator=(const Hibernate &) = delete;
32    Hibernate &operator=(const Hibernate &&) = delete;
33    ~Hibernate() {};
34
35    void Init();
36    int32_t DoHibernate();
37
38    static Hibernate &GetInstance()
39    {
40        static Hibernate instance;
41        return instance;
42    }
43
44private:
45    Hibernate() {};
46    void InitSwap();
47    bool IsSwapFileExist();
48    int32_t MkSwap();
49    int32_t CheckSwapFile(bool &needToCreateSwapFile);
50    int32_t CheckSwapFileSize(bool &isRightSize);
51    int32_t CreateSwapFile();
52    int32_t RemoveSwapFile();
53    int32_t EnableSwap();
54    int32_t GetResumeOffset(uint64_t &resumeOffset);
55    int32_t GetResumeInfo(std::string &resumeInfo);
56    int32_t WriteOffsetAndResume();
57    int32_t WriteOffset();
58    int32_t WriteResume();
59    int32_t WritePowerState();
60
61    std::atomic_bool swapFileReady_ {false};
62    std::mutex initMutex_;
63};
64} // namespace V1_2
65} // namespace Power
66} // namespace HDI
67} // namespace OHOS
68
69#endif // OHOS_HDI_POWER_V1_2_HIBERNATE_H