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-rw-r--r--core/src/fxcrt/fx_basic_memmgr.cpp55
1 files changed, 50 insertions, 5 deletions
diff --git a/core/src/fxcrt/fx_basic_memmgr.cpp b/core/src/fxcrt/fx_basic_memmgr.cpp
index 6538ea6a70..3b3211c20f 100644
--- a/core/src/fxcrt/fx_basic_memmgr.cpp
+++ b/core/src/fxcrt/fx_basic_memmgr.cpp
@@ -5,12 +5,12 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "../../include/fxcrt/fx_basic.h"
-
+#ifdef __cplusplus
extern "C" {
-
+#endif
void* FXMEM_DefaultAlloc(size_t byte_size, int flags)
{
- return malloc(byte_size);
+ return (void*)malloc(byte_size);
}
void* FXMEM_DefaultRealloc(void* pointer, size_t new_size, int flags)
{
@@ -20,5 +20,50 @@ void FXMEM_DefaultFree(void* pointer, int flags)
{
free(pointer);
}
-
-} // extern "C"
+#ifdef __cplusplus
+}
+#endif
+CFX_GrowOnlyPool::CFX_GrowOnlyPool(size_t trunk_size)
+{
+ m_TrunkSize = trunk_size;
+ m_pFirstTrunk = NULL;
+}
+CFX_GrowOnlyPool::~CFX_GrowOnlyPool()
+{
+ FreeAll();
+}
+struct _FX_GrowOnlyTrunk {
+ size_t m_Size;
+ size_t m_Allocated;
+ _FX_GrowOnlyTrunk* m_pNext;
+};
+void CFX_GrowOnlyPool::FreeAll()
+{
+ _FX_GrowOnlyTrunk* pTrunk = (_FX_GrowOnlyTrunk*)m_pFirstTrunk;
+ while (pTrunk) {
+ _FX_GrowOnlyTrunk* pNext = pTrunk->m_pNext;
+ FX_Free(pTrunk);
+ pTrunk = pNext;
+ }
+ m_pFirstTrunk = NULL;
+}
+void* CFX_GrowOnlyPool::Alloc(size_t size)
+{
+ size = (size + 3) / 4 * 4;
+ _FX_GrowOnlyTrunk* pTrunk = (_FX_GrowOnlyTrunk*)m_pFirstTrunk;
+ while (pTrunk) {
+ if (pTrunk->m_Size - pTrunk->m_Allocated >= size) {
+ void* p = (FX_LPBYTE)(pTrunk + 1) + pTrunk->m_Allocated;
+ pTrunk->m_Allocated += size;
+ return p;
+ }
+ pTrunk = pTrunk->m_pNext;
+ }
+ size_t alloc_size = size > m_TrunkSize ? size : m_TrunkSize;
+ pTrunk = (_FX_GrowOnlyTrunk*)FX_Alloc(FX_BYTE, sizeof(_FX_GrowOnlyTrunk) + alloc_size);
+ pTrunk->m_Size = alloc_size;
+ pTrunk->m_Allocated = size;
+ pTrunk->m_pNext = (_FX_GrowOnlyTrunk*)m_pFirstTrunk;
+ m_pFirstTrunk = pTrunk;
+ return pTrunk + 1;
+}