/** Deterministic filesystem interleavings for unit tests; never set in runtime code. */
export interface FileLockTestHooks {
    afterPinnedHolderFirstStat?: (path: string) => void | Promise<void>;
    afterPinnedHolderFirstStatSync?: (path: string) => void;
    beforeStaleClaimOwnerPublish?: (ownerPath: string) => void | Promise<void>;
    beforeStaleClaimOwnerPublishSync?: (ownerPath: string) => void;
    beforeStalePublicLockUnlink?: (lockPath: string) => void | Promise<void>;
    beforeStalePublicLockUnlinkSync?: (lockPath: string) => void;
}
export declare function __testOnly_setFileLockHooks(hooks?: FileLockTestHooks): void;
export interface FileLockOptions {
    /** Max time to wait for the lock before throwing (default MAX_WAIT_MS). */
    maxWaitMs?: number;
    /** Min lock age before a dead-PID lock is stale-breakable (default MIN_STALE_AGE_MS). */
    minStaleAgeMs?: number;
}
export declare function withFileLock<T>(targetPath: string, fn: () => Promise<T>, opts?: FileLockOptions): Promise<T>;
export declare function withFileLockSync<T>(targetPath: string, fn: () => T, opts?: FileLockOptions): T;
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