79 lines
2.3 KiB
TypeScript
79 lines
2.3 KiB
TypeScript
module es {
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/**
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* 用于池任何对象
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*/
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export class Pool {
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private static _objectQueue: Map<any, any[]> = new Map();
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/**
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* 预热缓存，使用最大的cacheCount对象填充缓存
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* @param type
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* @param cacheCount
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*/
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public static warmCache<T>(type: new (...args) => T, cacheCount: number) {
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this.checkCreate(type);
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cacheCount -= this._objectQueue.get(type).length;
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if (cacheCount > 0) {
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for (let i = 0; i < cacheCount; i++) {
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this._objectQueue.get(type).unshift(new type());
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}
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}
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}
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/**
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* 将缓存修剪为cacheCount项目
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* @param cacheCount
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*/
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public static trimCache<T>(type: new (...args) => T, cacheCount: number) {
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this.checkCreate(type);
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while (cacheCount > this._objectQueue.get(type).length)
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this._objectQueue.get(type).shift();
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}
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/**
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* 清除缓存
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*/
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public static clearCache<T>(type: new (...args) => T) {
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this.checkCreate(type);
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this._objectQueue.get(type).length = 0;
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}
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/**
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* 如果可以的话，从堆栈中弹出一个项
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*/
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public static obtain<T>(type: new (...args) => T): T {
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this.checkCreate(type);
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if (this._objectQueue.get(type).length > 0)
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return this._objectQueue.get(type).shift();
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return new type() as T;
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}
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/**
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* 将项推回堆栈
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* @param obj
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*/
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public static free<T>(type: new (...args) => T, obj: T) {
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this.checkCreate(type);
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this._objectQueue.get(type).unshift(obj);
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if (isIPoolable(obj)) {
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obj["reset"]();
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}
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}
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private static checkCreate<T>(type: new (...args) => T) {
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if (!this._objectQueue.get(type))
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this._objectQueue.set(type, []);
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}
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}
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export interface IPoolable {
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/**
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* 重置对象以供重用。对象引用应该为空，字段可以设置为默认值
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*/
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reset();
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}
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export var isIPoolable = (props: any): props is IPoolable => typeof (props as IPoolable)['reset'] !== 'undefined';
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} |