export declare class FixedFIFO<T> {
    private buffer;
    private mask;
    private top;
    private btm;
    next: FixedFIFO<T> | null;
    get length(): number;
    constructor(hwm: number);
    clear(): void;
    push(data: T): boolean;
    shift(): T | undefined;
    peek(): T;
    isEmpty(): boolean;
}
/**
 * fifo队列
 */
export declare class FIFO {
    private hwm;
    private head;
    private tail;
    private length;
    constructor(hwm?: number);
    clear(): void;
    push(val: any): void;
    shift(): any;
    peek(): any;
    isEmpty(): boolean;
}
export default FIFO;