mirror of
https://github.com/sol1/rustguac.git
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Dave Kempe
87 lines
2.4 KiB
JavaScript
87 lines
2.4 KiB
JavaScript
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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var Guacamole = Guacamole || {};
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/**
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* Integer pool which returns consistently increasing integers while integers
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* are in use, and previously-used integers when possible.
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*
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* When a minimum pool size is specified, new integers are preferred over reused
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* integers until the minimum size is reached.
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*
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* @constructor
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* @param {number} [min_size]
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* The minimum number of integers which must have been returned before
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* previously-used and freed integers are allowed to be returned.
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*/
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Guacamole.IntegerPool = function(min_size) {
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/**
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* Reference to this integer pool.
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*
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* @private
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*/
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var guac_pool = this;
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/**
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* Array of available integers.
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*
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* @private
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* @type {!number[]}
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*/
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var pool = [];
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/**
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* The next integer to return if no more integers remain.
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*
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* @type {!number}
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*/
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this.next_int = 0;
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/**
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* Returns the next available integer in the pool. If possible, a previously
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* used integer will be returned.
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*
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* @return {!number}
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* The next available integer.
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*/
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this.next = function() {
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// If free'd integers exist and we've allocated the minimum, reuse it
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if (pool.length > 0 && (!min_size || guac_pool.next_int >= min_size))
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return pool.shift();
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// Otherwise, return a new integer
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return guac_pool.next_int++;
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};
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/**
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* Frees the given integer, allowing it to be reused.
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*
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* @param {!number} integer
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* The integer to free.
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*/
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this.free = function(integer) {
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pool.push(integer);
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};
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};
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