Nachos下的并发程序设计

//#include <iostream> class DLLElement { public: DLLElement( void *itemPtr, int sortKey); //void *operator new(size_t size) { return malloc(size);} //DLLElement &operator=(const DLLElement &); DLLElement *next; DLLElement *prev; int key; void *item; }; class DLList { public: DLList(); ~DLList(); void Prepend(void *item); void Append(void *item); void *Remove(int *keyPtr); bool IsEmpty(); void SortedInsert(void *item, int sortKey); void *SortedRemove(int sortkey); private: DLLElement *first; DLLElement *last; }; void ListInsert(int N, DLList *List); void ListRemove(int N, DLList *List);