export interface LockOwner {
    pid: number;
    token: string;
    at: number;
}
export declare function acquireDaemonLock(extra: Record<string, unknown>): {
    ok: true;
} | {
    ok: false;
    holder: LockOwner & Record<string, unknown>;
};
export declare function releaseDaemonLock(): void;
export declare function readDaemonLock(): (LockOwner & Record<string, unknown>) | undefined;
export declare function acquireWriterLock(file: string): {
    ok: true;
} | {
    ok: false;
    holder: LockOwner;
};
export declare function releaseWriterLock(file: string): void;
export declare function readWriterLock(file: string): LockOwner | undefined;