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// 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"
#include "mem_int.h"
void FXMEM_DestroyFoxitMgr(FXMEM_FoxitMgr* pFoxitMgr)
{
if (pFoxitMgr == NULL) {
return;
}
CFX_MemoryMgr* p = (CFX_MemoryMgr*)pFoxitMgr;
if (p->m_pSystemMgr->CollectAll) {
p->m_pSystemMgr->CollectAll(p->m_pSystemMgr);
}
if (p->m_bReleaseMgr) {
p->m_pSystemMgr->Free(p->m_pSystemMgr, p, 0);
}
if (p->m_pExternalMemory) {
free(p->m_pExternalMemory);
}
}
#ifdef __cplusplus
extern "C" {
#endif
static void* _DefAllocDebug(IFX_Allocator* pAllocator, size_t num, size_t size, FX_LPCSTR filename, int line)
{
if (size == 0 || num > SIZE_MAX/size)
return NULL;
size = size * num;
return ((FX_DefAllocator*)pAllocator)->m_pFoxitMgr->AllocDebug(size, 0, filename, line);
}
static void* _DefAlloc(IFX_Allocator* pAllocator, size_t num, size_t size)
{
if (size == 0 || num > SIZE_MAX/size)
return NULL;
size = size * num;
return ((FX_DefAllocator*)pAllocator)->m_pFoxitMgr->Alloc(size, 0);
}
static void* _DefReallocDebug(IFX_Allocator* pAllocator, void* p, size_t new_num, size_t size, FX_LPCSTR filename, int line)
{
if (size == 0 || new_num > SIZE_MAX/size)
return NULL;
size = size * new_num;
return ((FX_DefAllocator*)pAllocator)->m_pFoxitMgr->ReallocDebug(p, size, 0, filename, line);
}
static void* _DefRealloc(IFX_Allocator* pAllocator, void* p, size_t new_num, size_t size)
{
if (size == 0 || new_num > SIZE_MAX/size)
return NULL;
size = size * new_num;
return ((FX_DefAllocator*)pAllocator)->m_pFoxitMgr->Realloc(p, size, 0);
}
static void _DefFree(IFX_Allocator* pAllocator, void* p)
{
((FX_DefAllocator*)pAllocator)->m_pFoxitMgr->Free(p, 0);
}
#ifdef __cplusplus
}
#endif
void CFX_MemoryMgr::Init(FXMEM_SystemMgr* pSystemMgr)
{
m_pSystemMgr = pSystemMgr;
IFX_Allocator &ac = m_DefAllocator.m_Allocator;
ac.m_Alloc = _DefAlloc;
ac.m_AllocDebug = _DefAllocDebug;
ac.m_Realloc = _DefRealloc;
ac.m_ReallocDebug = _DefReallocDebug;
ac.m_Free = _DefFree;
m_DefAllocator.m_pFoxitMgr = this;
m_pExternalMemory = NULL;
m_bReleaseMgr = TRUE;
}
void CFX_MemoryMgr::PurgeMgr()
{
if (m_pSystemMgr->Purge) {
m_pSystemMgr->Purge(m_pSystemMgr);
}
}
void* CFX_MemoryMgr::Alloc(size_t size, int flags)
{
void* p = m_pSystemMgr->Alloc(m_pSystemMgr, size, flags);
if (p == NULL) {
return NULL;
}
return p;
}
void* CFX_MemoryMgr::AllocDebug(size_t size, int flags, FX_LPCSTR file, int line)
{
void* p = m_pSystemMgr->AllocDebug(m_pSystemMgr, size, flags, file, line);
if (p == NULL) {
return NULL;
}
return p;
}
void* CFX_MemoryMgr::Realloc(void* p, size_t size, int flags)
{
void* p1 = m_pSystemMgr->Realloc(m_pSystemMgr, p, size, flags);
if (p1 == NULL) {
return NULL;
}
return p1;
}
void* CFX_MemoryMgr::ReallocDebug(void* p, size_t size, int flags, FX_LPCSTR file, int line)
{
void* p1 = m_pSystemMgr->ReallocDebug(m_pSystemMgr, p, size, flags, file, line);
if (p1 == NULL) {
return NULL;
}
return p1;
}
void CFX_MemoryMgr::Free(void* p, int flags)
{
if (p == NULL) {
return;
}
m_pSystemMgr->Free(m_pSystemMgr, p, flags);
}
CFX_MemoryMgr* g_pDefFoxitMgr = NULL;
void* FXMEM_DefaultAlloc(size_t size, int flags)
{
return g_pDefFoxitMgr->Alloc(size, flags);
}
void* FXMEM_DefaultAlloc2(size_t size, size_t unit, int flags)
{
return g_pDefFoxitMgr->Alloc(size * unit, flags);
}
void* FXMEM_DefaultRealloc(void* p, size_t size, int flags)
{
if (p == NULL) {
return FXMEM_DefaultAlloc(size, flags);
}
return g_pDefFoxitMgr->Realloc(p, size, flags);
}
void* FXMEM_DefaultRealloc2(void* p, size_t size, size_t unit, int flags)
{
if (p == NULL) {
return FXMEM_DefaultAlloc2(size, unit, flags);
}
return g_pDefFoxitMgr->Realloc(p, size * unit, flags);
}
void* FXMEM_DefaultAllocDebug(size_t size, int flags, FX_LPCSTR file, int line)
{
return g_pDefFoxitMgr->AllocDebug(size, flags, file, line);
}
void* FXMEM_DefaultAllocDebug2(size_t size, size_t unit, int flags, FX_LPCSTR file, int line)
{
return g_pDefFoxitMgr->AllocDebug(size * unit, flags, file, line);
}
void* FXMEM_DefaultReallocDebug(void* p, size_t size, int flags, FX_LPCSTR file, int line)
{
if (p == NULL) {
return FXMEM_DefaultAllocDebug(size, flags, file, line);
}
return g_pDefFoxitMgr->ReallocDebug(p, size, flags, file, line);
}
void* FXMEM_DefaultReallocDebug2(void* p, size_t size, size_t unit, int flags, FX_LPCSTR file, int line)
{
if (p == NULL) {
return FXMEM_DefaultAllocDebug2(size, unit, flags, file, line);
}
return g_pDefFoxitMgr->ReallocDebug(p, size * unit, flags, file, line);
}
void FXMEM_DefaultFree(void* p, int flags)
{
g_pDefFoxitMgr->Free(p, flags);
}
IFX_Allocator* FXMEM_GetDefAllocator()
{
return &g_pDefFoxitMgr->m_DefAllocator.m_Allocator;
}
void* CFX_Object::operator new(size_t size)
{
return g_pDefFoxitMgr->Alloc(size, 0);
}
void* CFX_Object::operator new[](size_t size)
{
return g_pDefFoxitMgr->Alloc(size, 0);
}
void* CFX_Object::operator new[](size_t size, FX_LPCSTR file, int line)
{
return g_pDefFoxitMgr->AllocDebug(size, 0, file, line);
}
void* CFX_Object::operator new(size_t size, FX_LPCSTR file, int line)
{
return g_pDefFoxitMgr->AllocDebug(size, 0, file, line);
}
void CFX_Object::operator delete(void* p)
{
g_pDefFoxitMgr->Free(p, 0);
}
void CFX_Object::operator delete[](void* p)
{
g_pDefFoxitMgr->Free(p, 0);
}
void CFX_Object::operator delete(void* p, FX_LPCSTR file, int line)
{
g_pDefFoxitMgr->Free(p, 0);
}
void CFX_Object::operator delete[](void* p, FX_LPCSTR file, int line)
{
g_pDefFoxitMgr->Free(p, 0);
}
void* CFX_AllocObject::operator new(size_t size, IFX_Allocator* pAllocator, FX_LPCSTR filename, int line)
{
void* p = pAllocator ? pAllocator->m_AllocDebug(pAllocator, size, 1, filename, line) :
g_pDefFoxitMgr->AllocDebug(size, 0, filename, line);
((CFX_AllocObject*)p)->m_pAllocator = pAllocator;
return p;
}
void CFX_AllocObject::operator delete (void* p, IFX_Allocator* pAllocator, FX_LPCSTR filename, int line)
{
if (pAllocator) {
pAllocator->m_Free(pAllocator, p);
} else {
g_pDefFoxitMgr->Free(p, 0);
}
}
void* CFX_AllocObject::operator new(size_t size, IFX_Allocator* pAllocator)
{
void* p = pAllocator ? pAllocator->m_Alloc(pAllocator, size, 1) : g_pDefFoxitMgr->Alloc(size, 0);
((CFX_AllocObject*)p)->m_pAllocator = pAllocator;
return p;
}
void CFX_AllocObject::operator delete(void* p)
{
if (((CFX_AllocObject*)p)->m_pAllocator) {
(((CFX_AllocObject*)p)->m_pAllocator)->m_Free(((CFX_AllocObject*)p)->m_pAllocator, p);
} else {
g_pDefFoxitMgr->Free(p, 0);
}
}
void CFX_AllocObject::operator delete(void* p, IFX_Allocator* pAllocator)
{
if (pAllocator) {
pAllocator->m_Free(pAllocator, p);
} else {
g_pDefFoxitMgr->Free(p, 0);
}
}
extern "C" {
static void* _GOPAllocDebug(IFX_Allocator* pAllocator, size_t num, size_t size, FX_LPCSTR file, int line)
{
if (size == 0 || num > SIZE_MAX/size)
return NULL;
size = size * num;
return ((CFX_GrowOnlyPool*)pAllocator)->Alloc(size);
}
static void* _GOPAlloc(IFX_Allocator* pAllocator, size_t num, size_t size)
{
if (size == 0 || num > SIZE_MAX/size)
return NULL;
size = size * num;
return ((CFX_GrowOnlyPool*)pAllocator)->Alloc(size);
}
static void* _GOPReallocDebug(IFX_Allocator* pAllocator, void* p, size_t new_num, size_t size, FX_LPCSTR file, int line)
{
if (size == 0 || new_num > SIZE_MAX/size)
return NULL;
size = size * new_num;
return ((CFX_GrowOnlyPool*)pAllocator)->Realloc(p, size);
}
static void* _GOPRealloc(IFX_Allocator* pAllocator, void* p, size_t new_num, size_t size)
{
if (size == 0 || new_num > SIZE_MAX/size)
return NULL;
size = size * new_num;
return ((CFX_GrowOnlyPool*)pAllocator)->Realloc(p, size);
}
static void _GOPFree(IFX_Allocator* pAllocator, void* p)
{
}
};
CFX_GrowOnlyPool::CFX_GrowOnlyPool(IFX_Allocator* pAllocator, size_t trunk_size)
{
m_TrunkSize = trunk_size;
m_pFirstTrunk = NULL;
m_pAllocator = pAllocator ? pAllocator : &g_pDefFoxitMgr->m_DefAllocator.m_Allocator;
m_AllocDebug = _GOPAllocDebug;
m_Alloc = _GOPAlloc;
m_ReallocDebug = _GOPReallocDebug;
m_Realloc = _GOPRealloc;
m_Free = _GOPFree;
}
CFX_GrowOnlyPool::~CFX_GrowOnlyPool()
{
FreeAll();
}
void CFX_GrowOnlyPool::SetAllocator(IFX_Allocator* pAllocator)
{
ASSERT(m_pFirstTrunk == NULL);
m_pAllocator = pAllocator ? pAllocator : &g_pDefFoxitMgr->m_DefAllocator.m_Allocator;
}
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;
m_pAllocator->m_Free(m_pAllocator, 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;
if (alloc_size > SIZE_MAX - sizeof(_FX_GrowOnlyTrunk) )
return NULL;
pTrunk = (_FX_GrowOnlyTrunk*)m_pAllocator->m_Alloc(m_pAllocator, sizeof(_FX_GrowOnlyTrunk) + alloc_size, 1);
pTrunk->m_Size = alloc_size;
pTrunk->m_Allocated = size;
pTrunk->m_pNext = (_FX_GrowOnlyTrunk*)m_pFirstTrunk;
m_pFirstTrunk = pTrunk;
return pTrunk + 1;
}
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