raplist.h
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- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * Copyright (c) 1993 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the Computer Systems
- * Engineering Group at Lawrence Berkeley Laboratory.
- * 4. Neither the name of the University nor of the Laboratory may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Author:
- * Mohit Talwar (mohit@catarina.usc.edu)
- *
- * $Header: /cvsroot/nsnam/ns-2/rap/raplist.h,v 1.4 2005/09/18 23:33:34 tomh Exp $
- *
- * This is taken from UCB Nachos project
- *
- * list.h
- * Data structures to manage LISP-like lists.
- *
- * As in LISP, a list can contain any type of data structure
- * as an item on the list: IP addresses, pending interrupts etc.
- * That is why each item is a "void *", or in other words,
- * a "pointers to anything".
- */
- #ifndef RAPLIST_H
- #define RAPLIST_H
- typedef void (*VoidFunctionPtr)(long arg);
- typedef int (*CompareFunction)(void *item, void *key);
-
- // The following class defines a "List element" -- which is
- // used to keep track of one item on a List. It is equivalent to a
- // LISP cell, with a "car" ("next") pointing to the next element on the List,
- // and a "cdr" ("item") pointing to the item on the List.
- class ListElement
- {
- public:
- ListElement(void *itemPtr, float sortKey); // initialize a List element
-
- ListElement *next; // next element on List,
- // NULL if this is the last
- float key; // priority (+ve), for a sorted List
- // identification, for some
- void *item; // pointer to item on the List
- };
- // The following class defines a "List" -- a singly linked List of
- // List elements, each of which points to a single item on the List.
- //
- // By using the "Sorted" functions, the List can be kept in sorted
- // in increasing order by "key" in ListElement.
- class List
- {
- public:
- List(); // Initialize the List
- ~List(); // Deallocate the List
-
- void Prepend(void *item); // Put item at the beginning of the List
- void Append(void *item); // Put item at the end of the List
- void *Remove(); // Take item off the front of the List
-
- void Mapcar(VoidFunctionPtr func); // Apply "func" to every element
- // on the List
- int IsEmpty(); // Is the List empty?
- int Size() {return size;} // Return the number of elements
- // Routines to put/get items on/off List in order (sorted by key)
- void SortedInsert(void *item, float sortKey); // Put item into List
- void *SortedRemove(float *keyPtr); // Remove first item from List
- float MinKey(); // sortKey of item at front
- // Routines to put/get items on/off a Set
- int SetInsert(void *key, CompareFunction eq); // Put key into set
- void *SetRemove(void *key, CompareFunction eq); // Remove key from set
- void *IsPresent(void *key, CompareFunction eq); // Is key there in set
- void Purge(void *key, CompareFunction eq, VoidFunctionPtr destroy);
-
- private:
- ListElement *first; // Head of the List, NULL if List is empty
- ListElement *last; // Last element of List
- int size; // Number of elements in the List
- };
- #endif // RAPLIST_H