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 FOUNDATION_ACE_FRAMEWORKS_BASE_MEMORY_MEMORY_MONITOR_H
17 #define FOUNDATION_ACE_FRAMEWORKS_BASE_MEMORY_MEMORY_MONITOR_H
18 
19 #include <string>
20 
21 #include "base/memory/memory_monitor_def.h"
22 #include "base/memory/type_info_base.h"
23 #include "base/utils/macros.h"
24 
25 namespace OHOS::Ace {
26 
27 void PurgeMallocCache();
28 
29 class ACE_FORCE_EXPORT MemoryMonitor {
30 public:
31     static MemoryMonitor& GetInstance();
32 
33     virtual ~MemoryMonitor() = default;
34 
35     virtual void Add(void* ptr) = 0;
36     virtual void Remove(void* ptr) = 0;
37     virtual void Update(void* ptr, size_t size, const std::string& typeName) = 0;
38     virtual void Dump() const = 0;
39 
40     template<class T>
Update(T * ptr,void * refPtr)41     void Update(T* ptr, void* refPtr)
42     {
43         if (ptr != nullptr && ptr->RefCount() == 0) {
44             Update(refPtr, TypeInfo<T>::Size(ptr), TypeInfo<T>::Name(ptr));
45         }
46     }
47 
IsEnable()48     static bool IsEnable()
49     {
50         return isEnable_;
51     }
52 
53 private:
54     template<class T, bool hasTypeInfo = std::is_base_of_v<TypeInfoBase, T>>
55     struct TypeInfo;
56 
57     template<class T>
58     struct TypeInfo<T, false> {
59         static const char* Name(T*)
60         {
61             return "Unknown";
62         }
63 
64         static size_t Size(T*)
65         {
66             return sizeof(T);
67         }
68     };
69 
70     template<class T>
71     struct TypeInfo<T, true> {
72         static const char* Name(T* rawPtr)
73         {
74             return TypeInfoHelper::TypeName(rawPtr);
75         }
76 
77         static size_t Size(T* rawPtr)
78         {
79             return TypeInfoHelper::TypeSize(rawPtr);
80         }
81     };
82     static bool isEnable_;
83 };
84 } // namespace OHOS::Ace
85 
86 #endif // FOUNDATION_ACE_FRAMEWORKS_BASE_MEMORY_MEMORY_MONITOR_H
87