void GarbageCollector::RemoveReferencesToNode( wxNode* pItemNode )
{
wxNode* pNode = mAllNodes.GetFirst();
while( pNode )
{
wxList& refLst = node_to_item( pNode ).mRefs;
wxNode* pRefNode = refLst.GetFirst();
while( pRefNode )
{
if ( pRefNode->GetData() == (wxObject*)pItemNode )
{
wxNode* pNext = pRefNode->GetNext();
refLst.DeleteNode( pRefNode );
pRefNode = pNext;
continue;
}
else pRefNode = pRefNode->GetNext();
}
pNode = pNode->GetNext();
}
}
void GarbageCollector::DestroyItemList( wxList& lst )
{
wxNode* pNode = lst.GetFirst();
while( pNode )
{
delete &node_to_item( pNode );
pNode = pNode->GetNext();
}
lst.Clear();
}
wxNode* GarbageCollector::FindReferenceFreeItemNode()
{
wxNode* pNode = mAllNodes.GetFirst();
while( pNode )
{
if ( node_to_item( pNode ).mRefs.GetCount() == 0 )
return pNode;
pNode = pNode->GetNext();
}
return 0;
}
wxNode* GarbageCollector::FindItemNode( void* pForObj )
{
wxNode* pNode = mAllNodes.GetFirst();
while( pNode )
{
if ( node_to_item( pNode ).mpObj == pForObj )
return pNode;
pNode = pNode->GetNext();
}
return NULL;
}
//删除节点，释放节点空间
int student_del(struct listnode *list,int id)
{
struct listnode *node;
student *stu;
list_for_each(node,list){
stu = node_to_item(node,student,_list);
if(id == stu->id){
printf("list_del, id:%d,name:%s\n",stu->id,stu->name);
list_remove(node);
#ifdef STUDENT_FREE_MEMORY
//释放节点空间
free(stu);
stu = NULL;
#endif
return 1;
}
}
void GarbageCollector::ResolveReferences()
{
wxNode* pNode = mAllNodes.GetFirst();
while( pNode )
{
GCItem& item = node_to_item( pNode );
wxNode* pRefNode = item.mRefs.GetFirst();
while( pRefNode )
{
pRefNode->SetData( (wxObject*) FindItemNode( (void*)pRefNode->GetData() ) );
pRefNode = pRefNode->GetNext();
}
pNode = pNode->GetNext();
}
}
void GarbageCollector::AddDependency( void* pObj, void* pDependsOnObj )
{
node_to_item( FindItemNode( pObj ) ).mRefs.Append( (wxObject*)pDependsOnObj );
}