OrderedInitializer.h

/*
 * $Id$
 * Copyright (c) 2007 - IRIT-UPS <casse@irit.fr>
 *
 * OrderedInitializer class interface.
 */
#ifndef ELM_UTIL_ORDERED_INITIALIZER_H
#define ELM_UTIL_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:
    Initializer(bool start = true);
    ~Initializer(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_UTIL_INITIALIZER_H