1 /*
2  * Copyright (c) 2022 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_MEMORY_MEMMGR_COMMON_INCLUDE_CONFIG_RECLAIM_CONFIG_H
17 #define OHOS_MEMORY_MEMMGR_COMMON_INCLUDE_CONFIG_RECLAIM_CONFIG_H
18 
19 #include <map>
20 #include <string>
21 #include <set>
22 #include <memory>
23 
24 #include "libxml/parser.h"
25 #include "libxml/xpath.h"
26 #include "kernel_interface.h"
27 #include "reclaim_strategy_constants.h"
28 #include "reclaim_priority_constants.h"
29 #include "memory_level_constants.h"
30 
31 namespace OHOS {
32 namespace Memory {
33 class ZswapdParam {
34 public:
35     int GetMinScore();
36     void SetMinScore(int minScore);
37     int GetMaxScore();
38     void SetMaxScore(int maxScore);
39     unsigned int GetMem2zramRatio();
40     void SetMem2zramRatio(unsigned int mem2zramRatio);
41     unsigned int GetZram2ufsRatio();
42     void SetZram2ufsRatio(unsigned int zram2ufsRatio);
43     unsigned int GetRefaultThreshold();
44     void SetRefaultThreshold(unsigned int refaultThreshold);
45     ZswapdParam();
46     ZswapdParam(int minScore, int maxScore, unsigned int mem2zramRatio,
47                 unsigned int zram2ufsRatio, unsigned int refaultThreshold);
48 
49 private:
50     int minScore_ = 0;
51     int maxScore_ = 0;
52     unsigned int mem2zramRatio_ = 0;
53     unsigned int zram2ufsRatio_ = 0;
54     unsigned int refaultThreshold_ = 0;
55 };
56 
57 struct ZswapdParamPtrCmp {
operatorZswapdParamPtrCmp58     bool operator()(const std::shared_ptr<ZswapdParam> p1, const std::shared_ptr<ZswapdParam> p2)
59     {
60         if (p1->GetMinScore() <= p2->GetMinScore()) {
61             return true;
62         } else {
63             return false;
64         }
65     };
66 };
67 
68 class ReclaimConfig {
69 public:
70     void ParseConfig(const xmlNodePtr &rootNodePtr);
71     void SetZswapdParamConfig(std::map<std::string, std::string> &param);
72     using ReclaimConfigSet = std::set<std::shared_ptr<ZswapdParam>, ZswapdParamPtrCmp>;
73     const ReclaimConfigSet& GetReclaimConfigSet();
74     void AddReclaimConfigToSet(std::shared_ptr<ZswapdParam> reclaimConfig);
75     void ClearReclaimConfigSet();
76     ReclaimConfig();
77     void CheckZswapdParam(std::shared_ptr<ZswapdParam> zswapdParam);
78     void SetDefaultConfig(int minScore, int maxScore, unsigned int mem2zramRatio,
79                           unsigned int zram2ufsRatio, unsigned int refaultThreshold);
80     void Dump(int fd);
81 private:
82     ReclaimConfigSet reclaimConfigSet_;
83 };
84 } // namespace Memory
85 } // namespace OHOS
86 #endif // OHOS_MEMORY_MEMMGR_COMMON_INCLUDE_CONFIG_RECLAIM_CONFIG_H