DarkGDK DBObject ID generator

gistfile1.cpp

typedef unsigned int DBObjectID;
class DBObject {
private:
	static DBObjectID IDCounter;
	static std::list<DBObjectID> RecycledIDs;
protected:
	const DBObjectID ID;
public:
	DBObject() : ID(GetNewID()) {
	}
	static DBObjectID GetNewID() {
		DBObjectID TempID;
		if (RecycledIDs.empty()) {
			TempID = IDCounter++;
		}
		else {
			TempID = RecycledIDs.front();
			RecycledIDs.pop_front();
		}
		return TempID;
	}
	~DBObject() {
		RecycledIDs.push_back(ID);
	}
};

DBObjectID DBObject::IDCounter = 1;
std::list<DBObjectID> DBObject::RecycledIDs;

An example of a DarkGDK Object ID generator I used to use. Referenced here: http://www.leadwerks.com/werkspace/topic/4959-darkgdk/