custom_t.hpp

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/*
 * Title:        bits/custom_t.hpp
 * Description:  C++ header-only wrapper for C-ABI data_t type
 * $Copyright (c) 2015-2016 Software AG, Darmstadt, Germany and/or Software AG USA Inc., Reston, VA, USA, and/or its subsidiaries and/or its affiliates and/or their licensors.$
 * Use, reproduction, transfer, publication or disclosure is prohibited except as specifically provided for in your License Agreement with Software AG
 * @Version:     $Id: custom_t.hpp 294926 2016-11-09 18:33:24Z matj $
 */

#ifndef _DATAT_BITS_INCLUDE_TAG
#error Must only be included from sag_connectivity_cpp.hpp, use that instead
#endif


template<typename T>
class custom_t: public sag_underlying_custom_t
{
        typedef custom_t this_t;
public:
        custom_t();
        custom_t(T *payload);
        ~custom_t();
        T *get() const { return this->data ? reinterpret_cast<T*>(this->data->custom) : 0; }
        custom_t(custom_t &&other);
        custom_t &operator=(custom_t &&other);
        void swap(custom_t &&other);
        custom_t copy() const;
        T &operator*() const { return *get(); }
        T *operator->() const { return get(); }
private:
        static void deleter(void *d) 
        {
                if (d) {
                        try {
                                delete reinterpret_cast<T*>(d); 
                        } catch (...) {
                                // enforce nothrow behaviour
                                abort();
                        }
                }
        }
        static void *copier(void *d)
        {
                try {
                        return d ? new T(*reinterpret_cast<T*>(d)) : 0; 
                } catch (...) {
                        // enforce nothrow behaviour
                        abort();
                }
        }
        custom_t(const custom_t &other) { abort(); }
        custom_t &operator=(const custom_t &other) { abort(); return *this; }
};