Kill CFX_GrowOnlyPool.

core/src/fxcrt/fx_basic_memmgr.cpp

 // 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 "../../include/fxcrt/fx_basic.h"
-#ifdef __cplusplus
+
 extern "C" {
-#endif
+
 void*   FXMEM_DefaultAlloc(size_t byte_size, int flags)
 {
-    return (void*)malloc(byte_size);
+    return malloc(byte_size);
 }
 void*   FXMEM_DefaultRealloc(void* pointer, size_t new_size, int flags)
 {
     return realloc(pointer, new_size);
 }
 void    FXMEM_DefaultFree(void* pointer, int flags)
 {
     free(pointer);
 }
-#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;
-}
+
+}  // extern "C"