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Diffstat (limited to 'core/src/fxcrt/mem_int.h')
| -rw-r--r-- | core/src/fxcrt/mem_int.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/core/src/fxcrt/mem_int.h b/core/src/fxcrt/mem_int.h new file mode 100644 index 0000000000..da43023bb5 --- /dev/null +++ b/core/src/fxcrt/mem_int.h @@ -0,0 +1,232 @@ +// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef _FXM_MEM_INT_H_
+#define _FXM_MEM_INT_H_
+struct FX_DefAllocator {
+ IFX_Allocator m_Allocator;
+ struct CFX_MemoryMgr* m_pFoxitMgr;
+};
+struct CFX_MemoryMgr {
+public:
+ FXMEM_SystemMgr* m_pSystemMgr;
+ FX_DefAllocator m_DefAllocator;
+ FX_LPVOID m_pExternalMemory;
+ FX_BOOL m_bReleaseMgr;
+ void Init(FXMEM_SystemMgr* pSystemMgr);
+ void* Alloc(size_t size, int flags);
+ void* AllocDebug(size_t size, int flags, FX_LPCSTR file, int line);
+ void* Realloc(void* p, size_t size, int flags);
+ void* ReallocDebug(void* p, size_t size, int flags, FX_LPCSTR file, int line);
+ void Free(void* p, int flags);
+ void PurgeMgr();
+};
+extern CFX_MemoryMgr* g_pDefFoxitMgr;
+#define FIXEDMEM_PAGE_EXTRASPACE sizeof(size_t)
+#define FIXEDMEM_BLOCKNUM(bs) (8 * (FX_FIXEDMEM_PAGESIZE - FIXEDMEM_PAGE_EXTRASPACE) / (8 * bs + 1))
+#define FIXEDMEM_8BYTES_BLOCKNUM FIXEDMEM_BLOCKNUM(8)
+#define FIXEDMEM_16BYTES_BLOCKNUM FIXEDMEM_BLOCKNUM(16)
+#define FIXEDMEM_32BYTES_BLOCKNUM FIXEDMEM_BLOCKNUM(32)
+extern const FX_BYTE ZeroLeadPos[256];
+extern const FX_BYTE OneLeadPos[256];
+template <size_t blockNum, size_t blockSize>
+class CFXMEM_FixedPage
+{
+public:
+ void Initialize()
+ {
+ m_nAvailCount = blockNum;
+ FXSYS_memset32(m_BusyMap, 0, (blockNum + 7) / 8);
+ }
+ FX_BOOL HasFreeBlock() const
+ {
+ return (FX_BOOL)m_nAvailCount;
+ }
+ FX_LPVOID Alloc(size_t size)
+ {
+ FXSYS_assert(m_nAvailCount);
+ FX_LPDWORD pFind = (FX_LPDWORD)m_BusyMap;
+ size_t i = 0;
+ while (i < (blockNum + 7) / 8 / 4 && pFind[i] == 0xFFFFFFFF) {
+ i ++;
+ }
+ i *= 4;
+ while (m_BusyMap[i] == 0xFF) {
+ i ++;
+ }
+ size_t pos = ZeroLeadPos[m_BusyMap[i]];
+ m_BusyMap[i] |= 1 << (7 - pos);
+ m_nAvailCount --;
+ return (FX_LPBYTE)(this + 1) + (i * 8 + pos) * blockSize;
+ }
+ void Free(FX_LPVOID p)
+ {
+ FXSYS_assert(p > (FX_LPVOID)this && p < (FX_LPVOID)((FX_LPBYTE)this + FX_FIXEDMEM_PAGESIZE));
+ size_t pos = ((FX_LPBYTE)p - (FX_LPBYTE)(this + 1)) / blockSize;
+ m_BusyMap[pos / 8] &= ~(1 << (7 - (pos % 8)));
+ m_nAvailCount ++;
+ }
+ volatile size_t m_nAvailCount;
+ FX_BYTE m_BusyMap[(blockNum + 7) / 8];
+};
+typedef CFXMEM_FixedPage<FIXEDMEM_8BYTES_BLOCKNUM, 8> CFXMEM_8BytesPage;
+typedef CFXMEM_FixedPage<FIXEDMEM_16BYTES_BLOCKNUM, 16> CFXMEM_16BytesPage;
+typedef CFXMEM_FixedPage<FIXEDMEM_32BYTES_BLOCKNUM, 32> CFXMEM_32BytesPage;
+template <size_t blockNum, size_t blockSize>
+class CFXMEM_FixedPages
+{
+public:
+ typedef CFXMEM_FixedPage<blockNum, blockSize> T;
+ FX_LPBYTE m_pStartPage;
+ FX_LPBYTE m_pLimitPos;
+ FX_LPBYTE m_pCurPage;
+ volatile size_t m_nAvailBlocks;
+ void Initialize(FX_LPBYTE pStart, size_t pages)
+ {
+ m_pStartPage = m_pCurPage = pStart;
+ m_nAvailBlocks = pages * blockNum;
+ for (size_t n = 0; n < pages; n ++) {
+ ((T*)pStart)->Initialize();
+ pStart += FX_FIXEDMEM_PAGESIZE;
+ }
+ m_pLimitPos = pStart;
+ }
+ FX_BOOL IsEmpty() const
+ {
+ return m_nAvailBlocks == (m_pLimitPos - m_pStartPage) / FX_FIXEDMEM_PAGESIZE * blockNum;
+ }
+ FX_BOOL HasFreeBlock() const
+ {
+ return (FX_BOOL)m_nAvailBlocks;
+ }
+ FX_LPVOID Alloc(size_t size)
+ {
+ FXSYS_assert(m_nAvailBlocks);
+ do {
+ if (((T*)m_pCurPage)->HasFreeBlock()) {
+ m_nAvailBlocks --;
+ return ((T*)m_pCurPage)->Alloc(size);
+ }
+ m_pCurPage += FX_FIXEDMEM_PAGESIZE;
+ if (m_pCurPage == m_pLimitPos) {
+ m_pCurPage = m_pStartPage;
+ }
+ } while (TRUE);
+ return NULL;
+ }
+ void Free(FX_LPVOID p)
+ {
+ FXSYS_assert(p > (FX_LPVOID)m_pStartPage && p < (FX_LPVOID)m_pLimitPos);
+ ((T*)(m_pStartPage + ((FX_LPBYTE)p - m_pStartPage) / FX_FIXEDMEM_PAGESIZE * FX_FIXEDMEM_PAGESIZE))->Free(p);
+ m_nAvailBlocks ++;
+ }
+};
+typedef CFXMEM_FixedPages<FIXEDMEM_8BYTES_BLOCKNUM, 8> CFXMEM_8BytesPages;
+typedef CFXMEM_FixedPages<FIXEDMEM_16BYTES_BLOCKNUM, 16> CFXMEM_16BytesPages;
+typedef CFXMEM_FixedPages<FIXEDMEM_32BYTES_BLOCKNUM, 32> CFXMEM_32BytesPages;
+class CFXMEM_Block
+{
+public:
+ size_t m_nBlockSize;
+ CFXMEM_Block* m_pNextBlock;
+};
+class CFXMEM_Page
+{
+public:
+ size_t m_nAvailSize;
+ CFXMEM_Block* m_pLimitPos;
+ CFXMEM_Block m_AvailHead;
+ void Initialize(size_t size);
+ FX_BOOL IsEmpty() const
+ {
+ return m_AvailHead.m_pNextBlock && m_AvailHead.m_nBlockSize == m_AvailHead.m_pNextBlock->m_nBlockSize;
+ }
+ FX_LPVOID Alloc(size_t size);
+ FX_LPVOID Realloc(FX_LPVOID p, size_t oldSize, size_t newSize);
+ void Free(FX_LPVOID p);
+protected:
+ FX_LPVOID Alloc(CFXMEM_Block* pPrevBlock, CFXMEM_Block* pNextBlock, size_t size, size_t oldsize);
+};
+class CFXMEM_Pages
+{
+public:
+ CFXMEM_Page* m_pStartPage;
+ CFXMEM_Page* m_pLimitPos;
+ CFXMEM_Page* m_pCurPage;
+ size_t m_nPageSize;
+ void Initialize(FX_LPBYTE pStart, size_t pageSize, size_t pages);
+ FX_BOOL IsEmpty() const;
+ FX_LPVOID Alloc(size_t size);
+ FX_LPVOID Realloc(FX_LPVOID p, size_t oldSize, size_t newSize);
+ void Free(FX_LPVOID p);
+};
+class CFXMEM_Pool
+{
+public:
+ CFXMEM_Pool* m_pPrevPool;
+ CFXMEM_Pool* m_pNextPool;
+ CFXMEM_8BytesPages m_8BytesPages;
+ CFXMEM_16BytesPages m_16BytesPages;
+ CFXMEM_32BytesPages m_32BytesPages;
+ CFXMEM_Pages m_MidPages;
+ FX_BOOL m_bAlone;
+ FX_DWORD m_dwReserved[3];
+ FX_LPVOID m_pLimitPos;
+ CFXMEM_Page* m_pLargePage;
+ void Initialize(const FX_MEMCONFIG* pMemConfig, size_t size, size_t pageNum8Bytes, size_t pageNum16Bytes, size_t pageNum32Bytes, size_t pageNumMid);
+ FX_BOOL IsEmpty() const;
+ size_t GetSize(FX_LPVOID p) const;
+ FX_LPVOID Realloc(FX_LPVOID p, size_t oldSize, size_t newSize);
+ void Free(FX_LPVOID p);
+};
+class CFXMEM_FixedMgr
+{
+public:
+ void Initialize(size_t size);
+ FX_LPVOID Alloc(size_t size);
+ FX_LPVOID Realloc(FX_LPVOID p, size_t newSize);
+ void Free(FX_LPVOID p);
+ void FreeAll();
+ void Purge();
+ CFXMEM_Pool* GetFirstPool()
+ {
+ return &m_FirstPool;
+ }
+ size_t GetSize(FX_LPVOID p) const;
+ FXMEM_SystemMgr m_SystemMgr;
+ FXMEM_SystemMgr2* m_pExtender;
+ FX_LPVOID m_pReserved;
+ FX_MEMCONFIG m_MemConfig;
+protected:
+ FX_LPVOID Alloc16(CFXMEM_Pool **pp32Pool = NULL, size_t size = 0);
+ FX_LPVOID Alloc32(size_t size);
+ FX_LPVOID AllocSmall(size_t size);
+ FX_LPVOID AllocMid(size_t size);
+ FX_LPVOID AllocLarge(size_t size);
+ FX_LPVOID ReallocSmall(CFXMEM_Pool* pPool, FX_LPVOID p, size_t oldSize, size_t newSize);
+ void FreePool(CFXMEM_Pool* pPool);
+ CFXMEM_Pool m_FirstPool;
+};
+#define FIXEDMEM_PROXYSIZE_0 (1024 * 1024 * 8)
+#define FIXEDMEM_PROXYSIZE_1 (1024 * 1024 * 16)
+#define FIXEDMEM_PROXYSIZE_2 (1024 * 1024 * 32)
+#define FIXEDMEM_PROXYSIZE_3 (1024 * 1024 * 64)
+#define FIXEDMEM_PROXYSIZE_4 (1024 * 1024 * 128)
+#define FIXEDMEM_PROXYSIZE_5 (1024 * 1024 * 256)
+const FX_MEMCONFIG* FixedMgr_GetConfig(size_t nSize);
+class CFixedMgr_Proxy
+{
+public:
+ FXMEM_FoxitMgr* Initialize(FX_LPVOID pBuffer, size_t nSize, FX_BOOL bExtensible);
+ static FX_BOOL Common_More(FXMEM_SystemMgr2* pMgr, size_t alloc_size, void** new_memory, size_t* new_size);
+ static void Common_Free(FXMEM_SystemMgr2* pMgr, void* memory);
+ FXMEM_SystemMgr2 m_SystemMgr;
+ CFXMEM_Page* m_pFixedPage;
+ FX_LPVOID m_pBuffer;
+ size_t m_nSize;
+ FX_BOOL m_bExtensible;
+};
+#endif
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