Creating STL Containers in Shared Memory

Listing 3: A container factory

struct keyComp {
    bool operator()(const char* key1,const char* key2)
    {
        return(strcmp(key1,key2)<0);
    }
};
class containerMap: public map<char*,void*,keyComp,SharedAllocator<char* > > {};
class containerFactory {
    public:
        containerFactory():pool_(sizeof(containerMap)){}
        ~containerFactory() {}
        template<class Container> Container* createContainer
            (char* key,Container* c=NULL);
        template<class Container> Container* getContainer
            (char* key,Container* c=NULL);
        template<class Container> int removeContainer
            (char* key,Container* c=NULL); 
    private:
        Pool pool_;
        int lock_();
        int unlock_();
};