tlm_array.h

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#ifndef TLM_CORE_TLM2_TLM_ARRAY_H_INCLUDED_
#define TLM_CORE_TLM2_TLM_ARRAY_H_INCLUDED_

#include <vector>

#if defined(_MSC_VER) && !defined(SC_WIN_DLL_WARN)
#pragma warning(push)
#pragma warning(disable: 4251) // DLL import for std::string,vector
#endif

namespace tlm {

//
// To the LRM writer: the below class is an artifact of the tlm_generic_payload
//                    implementation and not part of the core TLM standard
//


// This implements a lean and fast array class that supports array expansion on
// request. The class is primarily used in the tlm_generic_payload class for
// storing the pointers to the extensions.
//
// Individual array elements can be accessed through the [] operators, and the
// array length is returned by the size() method.
//
// The size can be dynamically expanded using the expand(uint) method. There
// is no shrinking mechanism implemented, because the extension mechanism
// does not require this feature. Bear in mind that calling the expand method
// may invalidate all direct pointers into the array.


//the tlm_array shall always be used with T=tlm_extension_base*
template <typename T>
class tlm_array
  : private std::vector<T>
{
    typedef std::vector<T>                base_type;
    typedef typename base_type::size_type size_type;
public:

    // constructor:
    tlm_array(size_type size = 0)
        : base_type(size)
        , m_entries()
    {
        //m_entries.reserve(size); // optional
    }

    // copy constructor:
    // tlm_array(const tlm_array& orig) = default;

    // destructor:
    // ~tlm_array() = default;

    // operators for dereferencing:
    using base_type::operator[];

    // array size:
    using base_type::size;

    // expand the array if needed:
    void expand(size_type new_size)
    {
        if (new_size > size())
        {
            base_type::resize(new_size);
            //m_entries.reserve(new_size); // optional
        }
    }

    static const char* const kind_string;
    const char* kind() const { return kind_string; }

    //this function shall get a pointer to a array slot
    // it stores this slot in a cache of active slots
    void insert_in_cache(T* p)
    {
        //sc_assert( (p-&(*this)[0]) < size() );
        m_entries.push_back( p-&(*this)[0] );
    }

    //this functions clears all active slots of the array
    void free_entire_cache()
    {
        while(m_entries.size())
        {
            if ((*this)[m_entries.back()])      //we make sure no one cleared the slot manually
              (*this)[m_entries.back()]->free();//...and then we call free on the content of the slot
            (*this)[m_entries.back()]=0;        //afterwards we set the slot to NULL
            m_entries.pop_back();
        }
    }

protected:
    std::vector<size_type> m_entries;
};

template <typename T>
const char* const tlm_array<T>::kind_string = "tlm_array";

#if defined(_MSC_VER) && !defined(SC_WIN_DLL_WARN)
#pragma warning(pop)
#endif

} // namespace tlm

#endif /* TLM_CORE_TLM2_TLM_ARRAY_H_INCLUDED_ */