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_PURGEABLE_MEM_H
17 #define OHOS_UTILS_MEMORY_LIBPURGEABLEMEM_CPP_INCLUDE_PURGEABLE_MEM_H
18 
19 #include <memory> /* unique_ptr */
20 #include <shared_mutex> /* shared_mutex */
21 #include <string>
22 
23 #include "purgeable_mem_builder.h"
24 #include "purgeable_mem_base.h"
25 #include "ux_page_table.h"
26 
27 namespace OHOS {
28 namespace PurgeableMem {
29 class PurgeableMem : public PurgeableMemBase {
30 public:
31     PurgeableMem(size_t dataSize, std::unique_ptr<PurgeableMemBuilder> builder);
32     ~PurgeableMem();
33     void ResizeData(size_t newSize) override;
34 
35 protected:
36     std::unique_ptr<UxPageTable> pageTable_ = nullptr;
37     bool Pin() override;
38     bool Unpin() override;
39     bool IsPurged() override;
40     int GetPinStatus() const override;
41     bool CreatePurgeableData();
42     void AfterRebuildSucc() override;
43     std::string ToString() const override;
44 };
45 } /* namespace PurgeableMem */
46 } /* namespace OHOS */
47 #endif /* OHOS_UTILS_MEMORY_LIBPURGEABLEMEM_CPP_INCLUDE_PURGEABLE_MEM_H */
48