export declare class ConcurrencyLimiter {
    private readonly maxConcurrent;
    private readonly waitTimeoutMs;
    private readonly formatTimeoutError;
    private readonly formatCancelError;
    private activeCount;
    private readonly waiters;
    constructor(maxConcurrent: () => number, waitTimeoutMs: () => number, formatTimeoutError: (limit: number, timeoutMs: number) => string, formatCancelError: () => string);
    get pendingCount(): number;
    get active(): number;
    acquire(signal?: AbortSignal): Promise<void>;
    release(): void;
}