/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
var Guacamole = Guacamole || {};
/**
* Integer pool which returns consistently increasing integers while integers
* are in use, and previously-used integers when possible.
* @constructor
*/
Guacamole.IntegerPool = function() {
/**
* Reference to this integer pool.
*
* @private
*/
var guac_pool = this;
/**
* Array of available integers.
*
* @private
* @type {Number[]}
*/
var pool = [];
/**
* The next integer to return if no more integers remain.
* @type {Number}
*/
this.next_int = 0;
/**
* Returns the next available integer in the pool. If possible, a previously
* used integer will be returned.
*
* @return {Number} The next available integer.
*/
this.next = function() {
// If free'd integers exist, return one of those
if (pool.length > 0)
return pool.shift();
// Otherwise, return a new integer
return guac_pool.next_int++;
};
/**
* Frees the given integer, allowing it to be reused.
*
* @param {Number} integer The integer to free.
*/
this.free = function(integer) {
pool.push(integer);
};
};