/**
 * YuiHub V1 Backend - Lock Utilities
 * ReadWriteLock for LanceDB concurrency control
 */
import { RWLock } from 'async-rwlock';
export declare const rwLock: RWLock;
/**
 * Execute function with write lock (exclusive)
 * Use for: /save, /checkpoints, indexing
 */
export declare function withWriteLock<T>(fn: () => Promise<T>): Promise<T>;
/**
 * Execute function with read lock (shared)
 * Use for: /search, /export/context
 */
export declare function withReadLock<T>(fn: () => Promise<T>): Promise<T>;
/**
 * Execute function with exponential backoff retry
 */
export declare function withRetry<T>(fn: () => Promise<T>, maxRetries?: number, baseDelayMs?: number): Promise<T>;
import { Mutex } from 'async-mutex';
/** @deprecated Use withWriteLock instead */
export declare const globalMutex: Mutex;
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