sharedpropertyblock.h

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#pragma once
// 

#include "propertyblock.h"
#include "shared/src/blockmemset.h"

namespace models {
    template <class T> class SharedPropertyBlock {
    public:
        SharedPropertyBlock() { }
        virtual ~SharedPropertyBlock() { }

        const T *claim(const T &t);
        void      release(const T *t);

    private:
        BlockMemSet<T> properties_;
    };

    template <class T> const T *SharedPropertyBlock<T>::claim(const T &in) {
        auto i = properties_.insert(in);
        const T &t = *i.first;
        t.incrementReference();
        return &t;
    }

    template <class T> void SharedPropertyBlock<T>::release(const T *t) {
        assert(t);
        auto i = properties_.find(*t);
        assert(i!=properties_.end());
        const T &found = *i;
        assert(&found==t);
        if (!found.decrementReference())
            properties_.erase(i);
    }
} // namespace models

// EoF