import { Mutex } from "./mutex";
/**
 * A class to manage the flow of coroutines using signals.
 */
export declare class Signal {
    private callback;
    private chain;
    /**
     * Send a signal.
     */
    notify(): Promise<void>;
    /**
     * Wait until a signal is send.
     */
    wait(): Promise<void>;
    /**
     * Repeat a function until a signal is send.
     */
    repeat(f: (cancel: Signal) => Promise<void>, timeout?: number): Promise<void>;
    /**
     * Wait for a given time period unless a signal is send.
     */
    timeout(time: number): Promise<void>;
    while(f: (stop: Mutex) => Promise<void>): Promise<void>;
}
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