listItem.cpp Source File

00001 /*
00002  *                         Sun Public License Notice
00003  *
00004  * The contents of this file are subject to the Sun Public License
00005  * Version 1.0 (the "License"); you may not use this file except
00006  * in compliance with the License. A copy of the License is available
00007  * at http://www.sun.com/
00008  *
00009  * The Original Code is the Java Profiler module.  The Initial Developers
00010  * of the Original Code are Jan Stola, Pavel Vacha, Michal Pise, Petr Luner,
00011  * Lukas Petru and Marek Przeczek.
00012  *
00013  * Portions created by Jan Stola are Copyright (C) 2000-2001.
00014  * All Rights Reserved.
00015  *
00016  * Portions created by Pavel Vacha are Copyright (C) 2000-2001.
00017  * All Rights Reserved.
00018  *
00019  * Portions created by Michal Pise are Copyright (C) 2000-2001.
00020  * All Rights Reserved.
00021  *
00022  * Portions created by Petr Luner are Copyright (C) 2000-2001.
00023  * All Rights Reserved.
00024  *
00025  * Portions created by Lukas Petru are Copyright (C) 2000-2001.
00026  * All Rights Reserved.
00027  *
00028  * Portions created by Marek Przeczek are Copyright (C) 2000-2001.
00029  * All Rights Reserved.
00030  *
00031  * Contributors: Jan Stola, Pavel Vacha, Michal Pise, Petr Luner,
00032  *               Lukas Petru and Marek Przeczek.
00033  */
00034 
00035 #include "../list/listItem.h"
00036 
00037 ListItem* ListItem::add( ListItem** list) {
00038 
00039         _next = *list;
00040         _prev = NULL;
00041 
00042         _list = list;
00043 
00044         if( _next) _next->_prev = this;
00045 
00046         addRef();
00047 
00048         return this;
00049 }
00050 
00051 ListItem* ListItem::remove() {
00052 
00053         if( _prev) _prev->_next = _next;
00054   if( _next) _next->_prev = _prev;
00055 
00056         ListItem* p = _next;
00057 
00058         _next = NULL;
00059         _prev = NULL;
00060 
00061         if( _list && *_list == this) *_list = p;
00062 
00063         _list = NULL;
00064 
00065         releaseRef();
00066 
00067         return p;
00068 }