| /* |
| * 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); |
| }; |
| |
| }; |