import PQueue from 'p-queue';
type Task<TContext> = (ctx: TContext, signal: AbortSignal) => Promise<void>;
export type BackgroundQueueOptions = NonNullable<ConstructorParameters<typeof PQueue>[0]> & {
    concurrency: number;
};
export declare class BackgroundQueue<TContext = unknown> {
    private readonly context;
    private abortController;
    private queue;
    get signal(): AbortSignal;
    get destroyed(): boolean;
    constructor(context: TContext, options?: BackgroundQueueOptions);
    add(task: Task<TContext>): void;
    processAll(): Promise<void>;
    destroy(): Promise<void>;
}
export {};
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