/**
 * A fixed-size, async queue, implemented on top of a circular buffer.
 */
export declare class AsyncQueue<Item> {
    /**
     * The circular buffer that backs the queue.
     */
    private readonly items;
    /**
     * The position of the first element in `items`. Calling `pop()` returns `items[start]`
     * (if non-empty).
     */
    private start;
    /**
     * The number of elements currently sitting in the queue. This can never exceed
     * `items.length`.
     */
    private len;
    private onReadyToPush;
    private onReadyToPop;
    private triggerReadyToPush;
    private triggerReadyToPop;
    constructor(maxSize: number);
    get size(): number;
    get maxSize(): number;
    isEmpty(): boolean;
    isFull(): boolean;
    /**
     * Adds a new element to the end of the queue. If the queue is full, waits until at
     * least one element is popped.
     */
    push(item: Item): Promise<void>;
    /**
     * Removes one element from the start of the queue. If the queue is empty, waits until
     * at least one element is pushed.
     */
    pop(): Promise<Item>;
    [Symbol.iterator](): Generator<Item>;
    clear(): void;
}
//# sourceMappingURL=asyncQueue.d.ts.map