import { Atom, WritableAtom, AnyAtom, OnUnmount } from './types';
declare type Revision = number;
declare type ReadDependencies = Map<AnyAtom, Revision>;
export declare type AtomState<Value = unknown> = {
    re?: Error;
    rp?: Promise<void>;
    wp?: Promise<void>;
    v?: Value;
    r: Revision;
    d: ReadDependencies;
};
declare type AtomStateMap = WeakMap<AnyAtom, AtomState>;
declare type UseAtomSymbol = symbol;
declare type Dependents = Set<AnyAtom | UseAtomSymbol>;
declare type MountedMap = Map<AnyAtom, [
    Dependents,
    OnUnmount | void
]>;
declare type WorkInProgress = Map<AnyAtom, AtomState>;
export declare type UpdateState = (updater: (prev: State) => State) => void;
export declare type State = {
    a: AtomStateMap;
    m: MountedMap;
    w: WorkInProgress;
};
export declare const createState: (initialValues?: Iterable<readonly [
    Atom<unknown>,
    unknown
]> | undefined) => State;
export declare const readAtom: <Value>(state: State, updateState: UpdateState, readingAtom: Atom<Value>) => AtomState<Value>;
export declare const addAtom: (updateState: UpdateState, addingAtom: AnyAtom, useId: symbol) => void;
export declare const delAtom: (updateState: UpdateState, deletingAtom: AnyAtom, useId: symbol) => void;
export declare const writeAtom: <Value, Update>(updateState: UpdateState, writingAtom: WritableAtom<Value, Update>, update: Update) => void | Promise<void>;
export {};