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+%% ``The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved via the world wide web at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+%% AB. All Rights Reserved.''
+%% 
+%%     $Id$
+%%
+%%%----------------------------------------------------------------------
+%%% Purpose : A priority queue.
+%%%----------------------------------------------------------------------
+%%% This module implements a priority queue as defined in 
+%%% "Priority Queues and the STL" by Mark Nelson in Dr.Dobb's Journal, Jan 1996
+%%% see http://web2.airmail.net/markn/articles/pq_stl/priority.htm for more
+%%% information. (A heap implementation is planned aswell)
+%%%----------------------------------------------------------------------
+%%% The items of the queue is kept priority sorted, and because of that,
+%%% a push() operation costs more than a pop() operation (wich only
+%%% needs to return the top item of the queue(read: list)).
+%%%----------------------------------------------------------------------
+%%% The priority queue can be deceptively nice to use when creating for
+%%% example a Huffman coding tree.
+%%% See http://web2.airmail.net/markn/articles/pq_stl/priority.htm or
+%%% Dr.Dobb's Journal Jan, 96 for more information on this.
+%%%----------------------------------------------------------------------
+
+-module(eprof_suite_test).
+-export([test/1]).
+-export([new/0, push/3, pop/1]).
+
+test(Config) ->
+    Q1=new(),
+    Q2=push(Q1, "monkey",  3),
+    Q3=push(Q2, "banana",  4),
+    Q4=push(Q3, "jungle",  2),
+    Q5=push(Q4, "world",   5),
+    Q6=push(Q5, "universe",6),
+    Q7=push(Q6, "peanut",  1),
+%    io:format("~p~n",[Q7]),
+    {Itm, Q8}=pop(Q7),
+    ok.
+
+%% Returns a new priority queue.
+new() ->
+    [].
+
+%% Pushes a new item with a set priority into the queue.
+push(Queue, Itm, Pri) ->
+    insert(Queue, Itm, Pri, []).
+
+%% Pops the item with the highest priority out of the queue.
+pop([{Itm, Pri}|Queue]) ->
+    {Itm, Queue}.
+
+%% --- -- -
+%% Support functions.
+insert([], Itm, Pri, NewQ) ->
+    lists:flatten([lists:reverse(NewQ)|[{Itm, Pri}]]);
+% Itm>QItm>NewQ>Queue
+insert([{QItm,QPri}|Queue], Itm, Pri, NewQ) when Pri>QPri->
+    A = [{Itm, Pri}|[{QItm, QPri}]],
+    lists:flatten([[A|NewQ]|Queue]);
+insert([QItm|Rest], Itm, Pri, NewQ) ->
+    insert(Rest, Itm, Pri, [QItm|NewQ]).
+%% --- -- -