/** 写偏好 async RwLock(对齐 tokio::sync::RwLock 语义)。 */
export interface RwLock {
    /** 取读锁:writer 活跃或有 waiting writer 则入队(写偏好),否则 readers++。返回 release 函数。 */
    acquireRead(): Promise<() => void>;
    /** 取写锁:readers>0 或 writer 活跃则入队,否则 writer=true。返回 release 函数。 */
    acquireWrite(): Promise<() => void>;
}
export declare function makeRwLock(): RwLock;
/**
 * 两级锁 registry(解决 bash 全局性):
 * 第一级全局读写门(bash 写锁独占一切;read/edit/grep/glob 全局读锁,互相并发,与 bash 互斥);
 * 第二级 per-file 读写门(read/edit/multiedit 按 fileKey 取键,同文件读写隔离)。
 * bash 只取第一级写锁(独占全局即独占一切);grep/glob 只取第一级读锁(无 per-file)。
 */
export declare class RwLockRegistry {
    private readonly global;
    private readonly fileLocks;
    private fileLock;
    /**
     * 取两级锁。release 反序(先 per-file 再全局)。
     * - bash:{globalMode:"write"}(只全局写锁,独占一切)。
     * - read/edit/multiedit:{globalMode:"read", fileKey, fileMode}。
     * - grep/glob/webfetch:{globalMode:"read"}(只全局读锁)。
     */
    acquireTwoLevel(input: {
        globalMode: "read" | "write";
        fileKey?: string;
        fileMode?: "read" | "write";
    }): Promise<() => void>;
}