/**
 * Created by Ying  on 2017/12/9.
 **/
import { Subject } from "rxjs";
/**
 * 引用计数的对象基类
 * 当一个对象被创建出来，它拥有引用计数 1，如果没有被 ref，那么当前loop的末尾它会被自动 unref，从而被 '销毁'
 */
export declare abstract class RcObject extends Subject<void> {
    static debug: boolean;
    static unref_laters: any[];
    _rc: number;
    private static _scheduled;
    constructor();
    /**@private*/ static _unrefLater(): void;
    private unref;
    protected onRcClear(): void;
    protected onResurrected(): void;
    resurrect(): void;
}
/**
 * 增加引用计数
 * @param {T} o
 * @returns {T}
 */
export declare function ref<T extends RcObject>(o: T): T;
/**
 * 减少引用计数
 * @param {RcObject} o
 */
export declare function unref(o: RcObject): void;