export declare const WORKER_BUSY_CODE = "WORKER_BUSY";
export declare function setKaTeXWorker(nextWorker: Worker): void;
export declare function clearKaTeXWorker(): void;
export declare function setKaTeXWorkerDebug(enabled: boolean): void;
export declare function renderKaTeXInWorker(content: string, displayMode?: boolean, timeout?: number, signal?: AbortSignal): Promise<string>;
export declare function setKaTeXCache(content: string, displayMode: boolean, html: string): void;
export declare function getKaTeXWorkerLoad(): {
    inFlight: number;
    max: number;
};
export declare function setKaTeXWorkerMaxConcurrency(value: number): void;
export declare function isKaTeXWorkerBusy(): boolean;
export declare function waitForKaTeXWorkerSlot(timeout?: number, signal?: AbortSignal): Promise<void>;
export interface BackpressureOptions {
    timeout?: number;
    waitTimeout?: number;
    backoffMs?: number;
    maxRetries?: number;
    signal?: AbortSignal;
}
declare const defaultBackpressure: {
    timeout: number;
    waitTimeout: number;
    backoffMs: number;
    maxRetries: number;
};
export declare function setKaTeXBackpressureDefaults(options: Partial<typeof defaultBackpressure>): void;
export declare function getKaTeXBackpressureDefaults(): {
    timeout: number;
    waitTimeout: number;
    backoffMs: number;
    maxRetries: number;
};
export declare function renderKaTeXWithBackpressure(content: string, displayMode?: boolean, options?: BackpressureOptions): Promise<string>;
export {};