export type LockInitResponse = {
    writeAndUnlock: (data: string) => Promise<void>;
    unlock: () => Promise<void>;
};
type LockInitSyncResponse = {
    writeAndUnlock: (data: string) => void;
    unlock: () => void;
};
export declare const noop: () => void;
export declare const asyncNoop: () => Promise<void>;
/**
 *
 *This method exists as a separate function so it can be used by ConfigFile OR outside of ConfigFile.
 *
 * @param filePath where to save the file
 * @returns 2 functions:
 * - writeAndUnlock: a function that takes the data to write and writes it to the file, then unlocks the file whether write succeeded or not
 * - unlock: a function that unlocks the file (in case you don't end up calling writeAndUnlock)
 */
export declare const lockInit: (filePath: string) => Promise<LockInitResponse>;
/**
 * prefer async {@link lockInit}.
 * See its documentation for details.
 */
export declare const lockInitSync: (filePath: string) => LockInitSyncResponse;
/**
 * Poll until the file is unlocked.
 *
 * @param filePath file path to check
 */
export declare const pollUntilUnlock: (filePath: string) => Promise<void>;
export declare const pollUntilUnlockSync: (filePath: string) => void;
export {};