| // 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. |
| |
| #pragma once |
| |
| #include <chrono> |
| #include <memory> |
| |
| #include <android/snapshot/snapshot.pb.h> |
| #include <libsnapshot/snapshot.h> |
| |
| namespace android { |
| namespace snapshot { |
| |
| class ISnapshotMergeStats { |
| public: |
| virtual ~ISnapshotMergeStats() = default; |
| // Called when merge starts or resumes. |
| virtual bool Start() = 0; |
| virtual void set_state(android::snapshot::UpdateState state) = 0; |
| virtual void set_cow_file_size(uint64_t cow_file_size) = 0; |
| virtual uint64_t cow_file_size() = 0; |
| |
| // Called when merge ends. Properly clean up permanent storage. |
| class Result { |
| public: |
| virtual ~Result() {} |
| virtual const SnapshotMergeReport& report() const = 0; |
| // Time between successful Start() / Resume() to Finish(). |
| virtual std::chrono::steady_clock::duration merge_time() const = 0; |
| }; |
| // Return nullptr if any failure. |
| virtual std::unique_ptr<Result> Finish() = 0; |
| }; |
| |
| class SnapshotMergeStats : public ISnapshotMergeStats { |
| public: |
| // Not thread safe. |
| static SnapshotMergeStats* GetInstance(SnapshotManager& manager); |
| |
| // ISnapshotMergeStats overrides |
| bool Start() override; |
| void set_state(android::snapshot::UpdateState state) override; |
| void set_cow_file_size(uint64_t cow_file_size) override; |
| uint64_t cow_file_size() override; |
| std::unique_ptr<Result> Finish() override; |
| |
| private: |
| bool ReadState(); |
| bool WriteState(); |
| bool DeleteState(); |
| SnapshotMergeStats(const std::string& path); |
| |
| std::string path_; |
| SnapshotMergeReport report_; |
| // Time of the last successful Start() / Resume() call. |
| std::chrono::time_point<std::chrono::steady_clock> start_time_; |
| bool running_{false}; |
| }; |
| |
| } // namespace snapshot |
| } // namespace android |