1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef _FX_MEMORY_IMP 8 #define _FX_MEMORY_IMP 9 class CFX_DefStore; 10 class CFX_StaticStore; 11 class CFX_FixedStore; 12 class CFX_DynamicStore; 13 class CFX_DefStore : public IFX_MEMAllocator, public CFX_Target { 14 public: 15 CFX_DefStore() {} 16 ~CFX_DefStore() {} 17 virtual void Release() { delete this; } 18 virtual void* Alloc(size_t size) { return FX_Alloc(uint8_t, size); } 19 virtual void Free(void* pBlock) { FX_Free(pBlock); } 20 virtual size_t GetBlockSize() const { return 0; } 21 virtual size_t GetDefChunkSize() const { return 0; } 22 virtual size_t SetDefChunkSize(size_t size) { return 0; } 23 virtual size_t GetCurrentDataSize() const { return 0; } 24 }; 25 #if _FX_OS_ != _FX_ANDROID_ 26 #pragma pack(push, 1) 27 #endif 28 typedef struct _FX_STATICSTORECHUNK { 29 _FX_STATICSTORECHUNK* pNextChunk; 30 size_t iChunkSize; 31 size_t iFreeSize; 32 } FX_STATICSTORECHUNK, *FX_LPSTATICSTORECHUNK; 33 typedef FX_STATICSTORECHUNK const* FX_LPCSTATICSTORECHUNK; 34 #if _FX_OS_ != _FX_ANDROID_ 35 #pragma pack(pop) 36 #endif 37 class CFX_StaticStore : public IFX_MEMAllocator, public CFX_Target { 38 public: 39 CFX_StaticStore(size_t iDefChunkSize = 4096); 40 ~CFX_StaticStore(); 41 virtual void Release() { delete this; } 42 virtual void* Alloc(size_t size); 43 virtual void Free(void* pBlock) {} 44 virtual size_t GetBlockSize() const { return 0; } 45 virtual size_t GetDefChunkSize() const { return m_iDefChunkSize; } 46 virtual size_t SetDefChunkSize(size_t size); 47 virtual size_t GetCurrentDataSize() const { return m_iAllocatedSize; } 48 49 protected: 50 size_t m_iAllocatedSize; 51 size_t m_iDefChunkSize; 52 FX_LPSTATICSTORECHUNK m_pChunk; 53 FX_LPSTATICSTORECHUNK m_pLastChunk; 54 FX_LPSTATICSTORECHUNK AllocChunk(size_t size); 55 FX_LPSTATICSTORECHUNK FindChunk(size_t size); 56 }; 57 #if _FX_OS_ != _FX_ANDROID_ 58 #pragma pack(push, 1) 59 #endif 60 typedef struct _FX_FIXEDSTORECHUNK { 61 uint8_t* FirstFlag() const { 62 return (uint8_t*)this + sizeof(_FX_FIXEDSTORECHUNK); 63 } 64 uint8_t* FirstBlock() const { return FirstFlag() + iChunkSize; } 65 _FX_FIXEDSTORECHUNK* pNextChunk; 66 size_t iChunkSize; 67 size_t iFreeNum; 68 } FX_FIXEDSTORECHUNK, *FX_LPFIXEDSTORECHUNK; 69 typedef FX_FIXEDSTORECHUNK const* FX_LPCFIXEDSTORECHUNK; 70 #if _FX_OS_ != _FX_ANDROID_ 71 #pragma pack(pop) 72 #endif 73 class CFX_FixedStore : public IFX_MEMAllocator, public CFX_Target { 74 public: 75 CFX_FixedStore(size_t iBlockSize, size_t iBlockNumsInChunk); 76 virtual ~CFX_FixedStore(); 77 virtual void Release() { delete this; } 78 virtual void* Alloc(size_t size); 79 virtual void Free(void* pBlock); 80 virtual size_t GetBlockSize() const { return m_iBlockSize; } 81 virtual size_t GetDefChunkSize() const { return m_iDefChunkSize; } 82 virtual size_t SetDefChunkSize(size_t iChunkSize); 83 virtual size_t GetCurrentDataSize() const { return 0; } 84 85 protected: 86 size_t m_iBlockSize; 87 size_t m_iDefChunkSize; 88 FX_LPFIXEDSTORECHUNK m_pChunk; 89 FX_LPFIXEDSTORECHUNK AllocChunk(); 90 }; 91 #if _FX_OS_ != _FX_ANDROID_ 92 #pragma pack(push, 1) 93 #endif 94 typedef struct _FX_DYNAMICSTOREBLOCK { 95 _FX_DYNAMICSTOREBLOCK* NextBlock() const { 96 return (_FX_DYNAMICSTOREBLOCK*)(Data() + iBlockSize); 97 } 98 uint8_t* Data() const { 99 return (uint8_t*)this + sizeof(_FX_DYNAMICSTOREBLOCK); 100 } 101 size_t iBlockSize; 102 FX_BOOL bUsed; 103 } FX_DYNAMICSTOREBLOCK, *FX_LPDYNAMICSTOREBLOCK; 104 typedef FX_DYNAMICSTOREBLOCK const* FX_LPCDYNAMICSTOREBLOCK; 105 typedef struct _FX_DYNAMICSTORECHUNK { 106 FX_LPDYNAMICSTOREBLOCK FirstBlock() const { 107 return (FX_LPDYNAMICSTOREBLOCK)((uint8_t*)this + 108 sizeof(_FX_DYNAMICSTORECHUNK)); 109 } 110 _FX_DYNAMICSTORECHUNK* pNextChunk; 111 size_t iChunkSize; 112 size_t iFreeSize; 113 } FX_DYNAMICSTORECHUNK, *FX_LPDYNAMICSTORECHUNK; 114 typedef FX_DYNAMICSTORECHUNK const* FX_LPCDYNAMICSTORECHUNK; 115 #if _FX_OS_ != _FX_ANDROID_ 116 #pragma pack(pop) 117 #endif 118 class CFX_DynamicStore : public IFX_MEMAllocator, public CFX_Target { 119 public: 120 CFX_DynamicStore(size_t iDefChunkSize = 4096); 121 virtual ~CFX_DynamicStore(); 122 virtual void Release() { delete this; } 123 virtual void* Alloc(size_t size); 124 virtual void Free(void* pBlock); 125 virtual size_t GetBlockSize() const { return 0; } 126 virtual size_t GetDefChunkSize() const { return m_iDefChunkSize; } 127 virtual size_t SetDefChunkSize(size_t size); 128 virtual size_t GetCurrentDataSize() const { return 0; } 129 130 protected: 131 size_t m_iDefChunkSize; 132 FX_LPDYNAMICSTORECHUNK m_pChunk; 133 FX_LPDYNAMICSTORECHUNK AllocChunk(size_t size); 134 }; 135 #endif 136
