/**
 * Acquire a lock on a file or directory, creating the resource if it does not exist.
 * @param fileOrDirPath Path to the file or directory to lock.
 * @param signal Abort signal to release the lock.
 * @returns A function that releases the lock.
 */
export declare function acquireFileLock(fileOrDirPath: string, signal?: AbortSignal): Promise<() => void>;