diff options
Diffstat (limited to 'xfa/src/fgas/src/crt/fx_memory.cpp')
| -rw-r--r-- | xfa/src/fgas/src/crt/fx_memory.cpp | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/xfa/src/fgas/src/crt/fx_memory.cpp b/xfa/src/fgas/src/crt/fx_memory.cpp new file mode 100644 index 0000000000..12d081a645 --- /dev/null +++ b/xfa/src/fgas/src/crt/fx_memory.cpp @@ -0,0 +1,334 @@ +// 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
+
+#include "../fgas_base.h"
+#include "fx_memory.h"
+#define FX_4BYTEALIGN(size) (((size) + 3) / 4 * 4)
+IFX_MEMAllocator* FX_CreateAllocator(FX_ALLOCTYPE eType, size_t chunkSize, size_t blockSize)
+{
+ switch (eType) {
+#ifndef _FXEMB
+ case FX_ALLOCTYPE_Dynamic:
+ return FXTARGET_New CFX_DynamicStore(chunkSize);
+#endif
+ case FX_ALLOCTYPE_Default:
+ return FXTARGET_New CFX_DefStore();
+ case FX_ALLOCTYPE_Static:
+ return FXTARGET_New CFX_StaticStore(chunkSize);
+ case FX_ALLOCTYPE_Fixed:
+ return FXTARGET_New CFX_FixedStore(blockSize, chunkSize);
+ default:
+ return NULL;
+ }
+}
+CFX_StaticStore::CFX_StaticStore(size_t iDefChunkSize)
+ : m_iAllocatedSize(0)
+ , m_iDefChunkSize(iDefChunkSize)
+ , m_pChunk(NULL)
+ , m_pLastChunk(NULL)
+{
+ FXSYS_assert(m_iDefChunkSize != 0);
+}
+CFX_StaticStore::~CFX_StaticStore()
+{
+ register FX_LPSTATICSTORECHUNK pChunk, pNext;
+ pChunk = m_pChunk;
+ while (pChunk != NULL) {
+ pNext = pChunk->pNextChunk;
+ FX_Free(pChunk);
+ pChunk = pNext;
+ }
+}
+FX_LPSTATICSTORECHUNK CFX_StaticStore::AllocChunk(size_t size)
+{
+ FXSYS_assert(size != 0);
+ register FX_LPSTATICSTORECHUNK pChunk = (FX_LPSTATICSTORECHUNK)FX_Alloc(FX_BYTE, sizeof(FX_STATICSTORECHUNK) + size);
+ if (pChunk == NULL) {
+ return NULL;
+ }
+ pChunk->iChunkSize = size;
+ pChunk->iFreeSize = size;
+ pChunk->pNextChunk = NULL;
+ if (m_pLastChunk == NULL) {
+ m_pChunk = pChunk;
+ } else {
+ m_pLastChunk->pNextChunk = pChunk;
+ }
+ m_pLastChunk = pChunk;
+ return pChunk;
+}
+FX_LPSTATICSTORECHUNK CFX_StaticStore::FindChunk(size_t size)
+{
+ FXSYS_assert(size != 0);
+ if (m_pLastChunk == NULL || m_pLastChunk->iFreeSize < size) {
+ return AllocChunk(FX_MAX(m_iDefChunkSize, size));
+ }
+ return m_pLastChunk;
+}
+void* CFX_StaticStore::Alloc(size_t size)
+{
+ size = FX_4BYTEALIGN(size);
+ FXSYS_assert(size != 0);
+ register FX_LPSTATICSTORECHUNK pChunk = FindChunk(size);
+ FXSYS_assert(pChunk != NULL && pChunk->iFreeSize >= size);
+ register FX_LPBYTE p = (FX_LPBYTE)pChunk;
+ p += sizeof(FX_STATICSTORECHUNK) + pChunk->iChunkSize - pChunk->iFreeSize;
+ pChunk->iFreeSize -= size;
+ m_iAllocatedSize += size;
+ return p;
+}
+size_t CFX_StaticStore::SetDefChunkSize(size_t size)
+{
+ FXSYS_assert(size != 0);
+ size_t v = m_iDefChunkSize;
+ m_iDefChunkSize = size;
+ return v;
+}
+CFX_FixedStore::CFX_FixedStore(size_t iBlockSize, size_t iBlockNumsInChunk)
+ : m_iBlockSize(FX_4BYTEALIGN(iBlockSize))
+ , m_iDefChunkSize(FX_4BYTEALIGN(iBlockNumsInChunk))
+ , m_pChunk(NULL)
+{
+ FXSYS_assert(m_iBlockSize != 0 && m_iDefChunkSize != 0);
+}
+CFX_FixedStore::~CFX_FixedStore()
+{
+ register FX_LPFIXEDSTORECHUNK pChunk, pNext;
+ pChunk = m_pChunk;
+ while (pChunk != NULL) {
+ pNext = pChunk->pNextChunk;
+ FX_Free(pChunk);
+ pChunk = pNext;
+ }
+}
+FX_LPFIXEDSTORECHUNK CFX_FixedStore::AllocChunk()
+{
+ FX_INT32 iTotalSize = sizeof(FX_FIXEDSTORECHUNK) + m_iDefChunkSize + m_iBlockSize * m_iDefChunkSize;
+ register FX_LPFIXEDSTORECHUNK pChunk = (FX_LPFIXEDSTORECHUNK)FX_Alloc(FX_BYTE, iTotalSize);
+ if (pChunk == NULL) {
+ return NULL;
+ }
+ FXSYS_memset(pChunk->FirstFlag(), 0, m_iDefChunkSize);
+ pChunk->pNextChunk = m_pChunk;
+ pChunk->iChunkSize = m_iDefChunkSize;
+ pChunk->iFreeNum = m_iDefChunkSize;
+ m_pChunk = pChunk;
+ return pChunk;
+}
+void* CFX_FixedStore::Alloc(size_t size)
+{
+ if (size > m_iBlockSize) {
+ return NULL;
+ }
+ register FX_LPFIXEDSTORECHUNK pChunk = m_pChunk;
+ while (pChunk != NULL) {
+ if (pChunk->iFreeNum > 0) {
+ break;
+ }
+ pChunk = pChunk->pNextChunk;
+ }
+ if (pChunk == NULL) {
+ pChunk = AllocChunk();
+ }
+ FXSYS_assert(pChunk != NULL);
+ register FX_LPBYTE pFlags = pChunk->FirstFlag();
+ register size_t i = 0;
+ for (; i < pChunk->iChunkSize; i ++)
+ if (pFlags[i] == 0) {
+ break;
+ }
+ FXSYS_assert(i < pChunk->iChunkSize);
+ pFlags[i] = 1;
+ pChunk->iFreeNum --;
+ return pChunk->FirstBlock() + i * m_iBlockSize;
+}
+void CFX_FixedStore::Free(void* pBlock)
+{
+ FXSYS_assert(pBlock != NULL);
+ register FX_LPFIXEDSTORECHUNK pPrior, pChunk;
+ pPrior = NULL, pChunk = m_pChunk;
+ register FX_LPBYTE pStart = NULL, pEnd;
+ while (pChunk != NULL) {
+ pStart = pChunk->FirstBlock();
+ if (pBlock >= pStart) {
+ pEnd = pStart + m_iBlockSize * pChunk->iChunkSize;
+ if (pBlock < pEnd) {
+ break;
+ }
+ }
+ pPrior = pChunk, pChunk = pChunk->pNextChunk;
+ }
+ FXSYS_assert(pChunk != NULL);
+ register size_t iPos = ((FX_LPBYTE)pBlock - pStart) / m_iBlockSize;
+ FXSYS_assert(iPos < pChunk->iChunkSize);
+ register FX_LPBYTE pFlags = pChunk->FirstFlag();
+ if (pFlags[iPos] == 0) {
+ return;
+ }
+ pFlags[iPos] = 0;
+ pChunk->iFreeNum ++;
+ if (pChunk->iFreeNum == pChunk->iChunkSize) {
+ if (pPrior == NULL) {
+ m_pChunk = pChunk->pNextChunk;
+ } else {
+ pPrior->pNextChunk = pChunk->pNextChunk;
+ }
+ FX_Free(pChunk);
+ }
+}
+size_t CFX_FixedStore::SetDefChunkSize(size_t iChunkSize)
+{
+ FXSYS_assert(iChunkSize != 0);
+ size_t v = m_iDefChunkSize;
+ m_iDefChunkSize = FX_4BYTEALIGN(iChunkSize);
+ return v;
+}
+#ifndef _FXEMB
+CFX_DynamicStore::CFX_DynamicStore(size_t iDefChunkSize)
+ : m_iDefChunkSize(iDefChunkSize)
+ , m_pChunk(NULL)
+{
+ FXSYS_assert(m_iDefChunkSize != 0);
+}
+CFX_DynamicStore::~CFX_DynamicStore()
+{
+ register FX_LPDYNAMICSTORECHUNK pChunk, pNext;
+ pChunk = m_pChunk;
+ while (pChunk != NULL) {
+ pNext = pChunk->pNextChunk;
+ FX_Free(pChunk);
+ pChunk = pNext;
+ }
+}
+FX_LPDYNAMICSTORECHUNK CFX_DynamicStore::AllocChunk(size_t size)
+{
+ FXSYS_assert(size != 0);
+ register FX_LPDYNAMICSTORECHUNK pChunk = (FX_LPDYNAMICSTORECHUNK)FX_Alloc(FX_BYTE, sizeof(FX_DYNAMICSTORECHUNK) + sizeof(FX_DYNAMICSTOREBLOCK) * 2 + size);
+ if (pChunk == NULL) {
+ return NULL;
+ }
+ pChunk->iChunkSize = size;
+ pChunk->iFreeSize = size;
+ register FX_LPDYNAMICSTOREBLOCK pBlock = pChunk->FirstBlock();
+ pBlock->iBlockSize = size;
+ pBlock->bUsed = FALSE;
+ pBlock = pBlock->NextBlock();
+ pBlock->iBlockSize = 0;
+ pBlock->bUsed = TRUE;
+ if (m_pChunk != NULL && size >= m_iDefChunkSize) {
+ FX_LPDYNAMICSTORECHUNK pLast = m_pChunk;
+ while (pLast->pNextChunk != NULL) {
+ pLast = pLast->pNextChunk;
+ }
+ pLast->pNextChunk = pChunk;
+ pChunk->pNextChunk = NULL;
+ } else {
+ pChunk->pNextChunk = m_pChunk;
+ m_pChunk = pChunk;
+ }
+ return pChunk;
+}
+void* CFX_DynamicStore::Alloc(size_t size)
+{
+ size = FX_4BYTEALIGN(size);
+ FXSYS_assert(size != 0);
+ register FX_LPDYNAMICSTORECHUNK pChunk = m_pChunk;
+ register FX_LPDYNAMICSTOREBLOCK pBlock = NULL;
+ while (pChunk != NULL) {
+ if (pChunk->iFreeSize >= size) {
+ pBlock = pChunk->FirstBlock();
+ register FX_BOOL bFind = FALSE;
+ while(pBlock->iBlockSize != 0) {
+ if (!pBlock->bUsed && pBlock->iBlockSize >= size) {
+ bFind = TRUE;
+ break;
+ }
+ pBlock = pBlock->NextBlock();
+ }
+ if (bFind) {
+ break;
+ }
+ }
+ pChunk = pChunk->pNextChunk;
+ }
+ if (pChunk == NULL) {
+ pChunk = AllocChunk(FX_MAX(m_iDefChunkSize, size));
+ pBlock = pChunk->FirstBlock();
+ }
+ FXSYS_assert(pChunk != NULL && pBlock != NULL);
+ register size_t m = size + sizeof(FX_DYNAMICSTOREBLOCK);
+ pBlock->bUsed = TRUE;
+ if (pBlock->iBlockSize > m) {
+ register size_t n = pBlock->iBlockSize;
+ pBlock->iBlockSize = size;
+ register FX_LPDYNAMICSTOREBLOCK pNextBlock = pBlock->NextBlock();
+ pNextBlock->bUsed = FALSE;
+ pNextBlock->iBlockSize = n - size - sizeof(FX_DYNAMICSTOREBLOCK);
+ pChunk->iFreeSize -= size + sizeof(FX_DYNAMICSTOREBLOCK);
+ } else {
+ pChunk->iFreeSize -= pBlock->iBlockSize;
+ }
+ return pBlock->Data();
+}
+void CFX_DynamicStore::Free(void* pBlock)
+{
+ FXSYS_assert(pBlock != NULL);
+ register FX_LPDYNAMICSTORECHUNK pPriorChunk, pChunk;
+ pPriorChunk = NULL, pChunk = m_pChunk;
+ while (pChunk != NULL) {
+ if (pBlock > pChunk && pBlock <= ((FX_LPBYTE)pChunk + sizeof(FX_DYNAMICSTORECHUNK) + pChunk->iChunkSize)) {
+ break;
+ }
+ pPriorChunk = pChunk, pChunk = pChunk->pNextChunk;
+ }
+ FXSYS_assert(pChunk != NULL);
+ register FX_LPDYNAMICSTOREBLOCK pPriorBlock, pFindBlock;
+ pPriorBlock = NULL, pFindBlock = pChunk->FirstBlock();
+ while(pFindBlock->iBlockSize != 0) {
+ if (pBlock == (void*)pFindBlock->Data()) {
+ break;
+ }
+ pPriorBlock = pFindBlock;
+ pFindBlock = pFindBlock->NextBlock();
+ }
+ FXSYS_assert(pFindBlock->iBlockSize != 0 && pFindBlock->bUsed && pBlock == (void*)pFindBlock->Data());
+ pFindBlock->bUsed = FALSE;
+ pChunk->iFreeSize += pFindBlock->iBlockSize;
+ if (pPriorBlock == NULL) {
+ pPriorBlock = pChunk->FirstBlock();
+ } else if (pPriorBlock->bUsed) {
+ pPriorBlock = pFindBlock;
+ }
+ pFindBlock = pPriorBlock;
+ register size_t sizeFree = 0;
+ register size_t sizeBlock = 0;
+ while (pFindBlock->iBlockSize != 0 && !pFindBlock->bUsed) {
+ if (pFindBlock != pPriorBlock) {
+ sizeFree += sizeof(FX_DYNAMICSTOREBLOCK);
+ sizeBlock += sizeof(FX_DYNAMICSTOREBLOCK);
+ }
+ sizeBlock += pFindBlock->iBlockSize;
+ pFindBlock = pFindBlock->NextBlock();
+ }
+ pPriorBlock->iBlockSize = sizeBlock;
+ pChunk->iFreeSize += sizeFree;
+ if (pChunk->iFreeSize == pChunk->iChunkSize) {
+ if (pPriorChunk == NULL) {
+ m_pChunk = pChunk->pNextChunk;
+ } else {
+ pPriorChunk->pNextChunk = pChunk->pNextChunk;
+ }
+ FX_Free(pChunk);
+ }
+}
+size_t CFX_DynamicStore::SetDefChunkSize(size_t size)
+{
+ FXSYS_assert(size != 0);
+ size_t v = m_iDefChunkSize;
+ m_iDefChunkSize = size;
+ return v;
+}
+#endif
|