1 /*
2  * Copyright (c) 2021 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 COMBINE_STATUS_H
17 #define COMBINE_STATUS_H
18 
19 #include <set>
20 #include <cstdint>
21 
22 namespace DistributedDB {
23 /*
24  * Class CombineStatus does not support multi-thread.
25  * It should be protected by mutex in multi-thread environment
26  */
27 class CombineStatus {
28 public:
29     void UpdateProgressId(uint64_t inProgressId);
30     uint64_t GetProgressId() const;
31     bool CheckProgress();
32 
33     void SetFragmentLen(uint32_t inFragLen);
34     void SetLastFragmentLen(uint32_t inLastFragLen);
35     uint32_t GetThisFragmentLength(uint16_t inFragNo) const;
36     uint32_t GetThisFragmentOffset(uint16_t inFragNo) const;
37 
38     void SetFragmentCount(uint16_t inFragCount);
39     bool IsFragNoAlreadyExist(uint16_t inFragNo) const;
40     void CheckInFragmentNo(uint16_t inFragNo);
41     bool IsCombineDone() const;
42 
43 private:
44     uint64_t progressId_ = 0;
45     bool hasProgressFlag_ = true;
46 
47     uint32_t fragmentLen_ = 0; // Indicate the length of fragment that is split from a frame except the last one
48     uint32_t lastFragmentLen_ = 0; // Indicate the length of the last fragment that is split from a frame
49 
50     uint16_t fragmentCount_ = 0;
51     std::set<uint16_t> combinedFragmentNo_;
52 };
53 } // namespace DistributedDB
54 
55 #endif // COMBINE_STATUS_H
56