OrderedInitializer.h

/*
 *  OrderedInitializer class interface
 *
 *  This file is part of OTAWA
 *  Copyright (c) 2015, IRIT UPS.
 *
 *  OTAWA is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  OTAWA is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OTAWA; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef ELM_ORDERED_INITIALIZER_H
#define ELM_ORDERED_INITIALIZER_H
 
namespace elm {
 
// OrderedInitializer class
template <class T>
class OrderedInitializer {
    typedef struct node_t {
        struct node_t *next;
        T *object;
        inline node_t(T *_object, struct node_t *_next)
        : object(_object), next(_next) { }
    } node_t;
    
    static node_t *list;
    static bool initialized;
public:
    OrderedInitializer(bool start = true);
    ~OrderedInitializer(void);
    void record(T *object);
    void startup(void);
};
 
// Statics
template <class T> typename Initializer<T>::node_t *Initializer<T>::list = 0;
template <class T> bool Initializer<T>::initialized = false;
 
// Initializer<T>::Initializer
template <class T>
Initializer<T>::Initializer(bool start) {
    if(start)
        startup();
}
 
// Initializer<T>::~Initializer
template <class T>
Initializer<T>::~Initializer(void) {
    for(node_t *node = list, *next; node; node = next) {
        next = node->next;
        delete node;
    }
}
 
// Initializer<T>::record
template <class T>
void Initializer<T>::record(T *object) {
    if(initialized)
        object->initialize();
    else {
        list = new node_t(object, list);
    }
}
 
// Initializer<T>::startup()
template <class T>
void Initializer<T>::startup(void) {
    if(!initialized) {
        initialized = true;
        for(node_t *node = list, *next; node; node = next) {
            next = node->next;
            node->object->initialize();
            delete node;
        }
        list = 0;
    }
}
 
} // elm
 
#endif // ELM_INITIALIZER_H