import { type RootIdentity } from './filesystem.js';
export interface InstallerOperationLock {
    readonly status: 'acquired';
    readonly token: string;
    readonly rootIdentity: RootIdentity;
    readonly path: string;
    assertOwnership(token?: string): Promise<void>;
    release(): Promise<void>;
}
export type InstallerLockResult = InstallerOperationLock | {
    readonly status: 'busy';
    readonly reasonCode: 'INSTALLER_BUSY';
};
export declare function acquireInstallerOperationLock(location: string, options?: {
    readonly timeoutMs?: number;
    readonly now?: () => string;
}): Promise<InstallerLockResult>;
export declare function inspectInstallerLock(location: string): Promise<'absent' | 'active' | 'stale' | 'invalid'>;