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_UTILS_MEMORY_LIBPURGEABLEMEM_CPP_INCLUDE_UX_PAGE_TABLE_H
17 #define OHOS_UTILS_MEMORY_LIBPURGEABLEMEM_CPP_INCLUDE_UX_PAGE_TABLE_H
18 
19 #include <string> /* std::string */
20 
21 #include "ux_page_table_c.h" /* UxPageTableStruct */
22 
23 namespace OHOS {
24 namespace PurgeableMem {
25 class UxPageTable {
26 public:
27     UxPageTable(uint64_t startAddr, size_t size);
28     ~UxPageTable();
29 
30 private:
31     UxPageTableStruct *uxpt_;
32     friend class PurgeableMem;
33     /* only called by its friend */
34     void GetUxpte(uint64_t addr, size_t len);
35     void PutUxpte(uint64_t addr, size_t len);
36     bool CheckPresent(uint64_t addr, size_t len);
37     std::string ToString() const;
38 };
39 } /* namespace PurgeableMem */
40 } /* namespace OHOS */
41 #endif /* OHOS_UTILS_MEMORY_LIBPURGEABLEMEM_CPP_INCLUDE_UX_PAGE_TABLE_H */
42