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OwnedCntrShared.hh

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#ifndef MANGO_OWNED_CONTAINER_SHARED_H
#define MANGO_OWNED_CONTAINER_SHARED_H

#include "ValidityOwner.hh" // use
#include "CntrCleaner.hh"   // use
#include "CntrClonerFWD.hh" // use
#include "BLinkableFWD.hh"  // inherit
#include "OwnedFWD.hh"      // use

namespace MangoPtr
{    
    template <typename CntrType>
    class Owned<CntrType&, OShared>
        : protected BLinkable<ForOwnedBy::Wrapper>
    {
        public:
            typedef CntrType ObjectType;


            inline explicit Owned(CntrType&);
            inline Owned(const Owned&);
            inline ~Owned();

        public: 

            inline void cloneObjNew(CntrType&) const;
            inline void reset();
            CntrType& cntr() {return rcntr;}
            const CntrType& cntr() const {return rcntr;}
            CntrType* operator()() {return &rcntr;}
            const CntrType* operator()() const {return &rcntr;}

        private: // data
            CntrType& rcntr; 
            ValidityOwner ownership; 


            typedef void (Owned::*DeleteFn)();
            const DeleteFn cleanerUpper;
        
        private: 
            void doCleanUp() { CntrCleaner<CntrType>::execute(rcntr); }
    };
    
    template <typename CntrType>
    inline 
    Owned<CntrType&, OShared>::Owned(CntrType& cntr)
        : rcntr(cntr), cleanerUpper(&Owned::doCleanUp) { }
    
    template <typename CntrType>
    inline 
    Owned<CntrType&, OShared>::Owned(const Owned& rhs)
        : rcntr(rhs.rcntr), ownership(rhs.ownership),
          cleanerUpper(&Owned::doCleanUp) {}
    
    template <typename CntrType>
    inline 
    Owned<CntrType&, OShared>::~Owned()
    {
        if (! ownership.isShared()) reset();
    }
            
    template <typename CntrType>
    inline void
    Owned<CntrType&, OShared>::reset()
    {
        (this->*cleanerUpper)();
        CntrType empty;
        assert(empty.empty());
        std::swap(empty, rcntr);
        assert(rcntr.empty());
    }
            
    template <typename CntrType>
    inline void
    Owned<CntrType&, OShared>::cloneObjNew(CntrType& dest) 
    const 
    {
        assert(dest.empty()); // to prevent leaks
        dest = rcntr;
        CntrCloner<CntrType>::execute(dest);
    }
} // namespace


#endif // MANGO_OWNED_CONTAINER_SHARED_H

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