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 FONT_RAM_ALLOCATOR_H
17 #define FONT_RAM_ALLOCATOR_H
18 
19 #include <cstdint>
20 
21 #include "font/ui_font_allocator.h"
22 #include "gfx_utils/heap_base.h"
23 
24 namespace OHOS {
25 class FontRamAllocator : public HeapBase {
26     static constexpr uint8_t RAM_ALIGN = 2; // align up to 4 byte, power of 2
27 public:
28     FontRamAllocator();
29 
30     FontRamAllocator(const FontRamAllocator&) = delete;
31 
32     FontRamAllocator& operator=(const FontRamAllocator&) = delete;
33 
34     FontRamAllocator(const FontRamAllocator&&) = delete;
35 
36     FontRamAllocator& operator=(const FontRamAllocator&&) = delete;
37 
38     ~FontRamAllocator();
39 
GetInstance(void)40     static FontRamAllocator& GetInstance(void)
41     {
42         static FontRamAllocator instance_;
43         return instance_;
44     }
45 
46     void SetRamAddr(uintptr_t ramAddr, uint32_t ramLen);
47     void* Allocate(uint32_t size);
48     uint32_t GetRamUsedLen();
49     void ClearRam();
50     void* DynamicAllocate(uint32_t size);
51     void DynamicFree(void* addr);
52     uint32_t GetMemSize(void* addr);
53 
54 private:
55     uint32_t AlignUp(uint32_t addr);
56     bool IsAligned(uint32_t addr);
57 
58     uintptr_t ramAddr_;
59     uint32_t ramLen_;
60     uintptr_t currentRamAddr_;
61     uintptr_t dynamicAddr_;
62     UIFontAllocator allocator_;
63 };
64 } // namespace OHOS
65 #endif /* FONT_RAM_ALLOCATOR_H */