Kill CFX_GrowOnlyPool.

It's unused, and when the time comes, we'll want to put
pdfium onto a hardened allocator like partitionAlloc anyways.

Along the way, merge adjacent #ifdef __cplusplus blocks,
remove a pointless check for __cplusplus inside a .cpp file,
and remove a redundant cast.

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1008483002

2 files changed, 7 insertions, 94 deletions

diff --git a/core/include/fxcrt/fx_memory.h b/core/include/fxcrt/fx_memory.h
index cb71c04fca..8806bba7dd 100644
--- a/core/include/fxcrt/fx_memory.h
+++ b/core/include/fxcrt/fx_memory.h
@@ -65,12 +65,9 @@ public:
     }
     void			operator delete (void*, void*)							{}
 };
-#endif
-#ifdef __cplusplus
 #if defined(_DEBUG)
 #define FX_NEW new(__FILE__, __LINE__)
 #else
-
 #define FX_NEW new
 #endif
 #define FX_NEW_VECTOR(Pointer, Class, Count) \
@@ -91,44 +88,5 @@ public:
 
     virtual ~CFX_DestructObject() {}
 };
-class CFX_GrowOnlyPool : public CFX_Object
-{
-public:
-
-    CFX_GrowOnlyPool(size_t trunk_size = 16384);
-
-    ~CFX_GrowOnlyPool();
-
-    void	SetTrunkSize(size_t trunk_size)
-    {
-        m_TrunkSize = trunk_size;
-    }
-
-    void*	AllocDebug(size_t size, FX_LPCSTR file, int line)
-    {
-        return Alloc(size);
-    }
-
-    void*	Alloc(size_t size);
-
-    void*	ReallocDebug(void* p, size_t new_size, FX_LPCSTR file, int line)
-    {
-        return NULL;
-    }
-
-    void*	Realloc(void* p, size_t new_size)
-    {
-        return NULL;
-    }
-
-    void	Free(void*) {}
-
-    void	FreeAll();
-private:
-
-    size_t	m_TrunkSize;
-
-    void*	m_pFirstTrunk;
-};
-#endif
-#endif
+#endif  // __cplusplus
+#endif  // _FX_MEMORY_H_
diff --git a/core/src/fxcrt/fx_basic_memmgr.cpp b/core/src/fxcrt/fx_basic_memmgr.cpp
index 3b3211c20f..6538ea6a70 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 (void*)malloc(byte_size);
+    return malloc(byte_size);
 }
 void*	FXMEM_DefaultRealloc(void* pointer, size_t new_size, int flags)
 {
@@ -20,50 +20,5 @@ 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"