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import type { Disposable } from "./lifetime";
import type { QuickJSHandle } from "./types";
import type { QuickJSRuntime } from "./runtime";
import type { QuickJSContext } from "./context";
export type { PromiseExecutor } from "./types";
/**
 * QuickJSDeferredPromise wraps a QuickJS promise [[handle]] and allows
 * [[resolve]]ing or [[reject]]ing that promise. Use it to bridge asynchronous
 * code on the host to APIs inside a QuickJSContext.
 *
 * Managing the lifetime of promises is tricky. There are three
 * [[QuickJSHandle]]s inside of each deferred promise object: (1) the promise
 * itself, (2) the `resolve` callback, and (3) the `reject` callback.
 *
 * - If the promise will be fulfilled before the end of it's [[owner]]'s lifetime,
 *   the only cleanup necessary is `deferred.handle.dispose()`, because
 *   calling [[resolve]] or [[reject]] will dispose of both callbacks automatically.
 *
 * - As the return value of a [[VmFunctionImplementation]], return [[handle]],
 *   and ensure that either [[resolve]] or [[reject]] will be called. No other
 *   clean-up is necessary.
 *
 * - In other cases, call [[dispose]], which will dispose [[handle]] as well as the
 *   QuickJS handles that back [[resolve]] and [[reject]]. For this object,
 *   [[dispose]] is idempotent.
 */
export declare class QuickJSDeferredPromise implements Disposable {
    owner: QuickJSRuntime;
    context: QuickJSContext;
    /**
     * A handle of the Promise instance inside the QuickJSContext.
     * You must dispose [[handle]] or the entire QuickJSDeferredPromise once you
     * are finished with it.
     */
    handle: QuickJSHandle;
    /**
     * A native promise that will resolve once this deferred is settled.
     */
    settled: Promise<void>;
    private resolveHandle;
    private rejectHandle;
    private onSettled;
    /**
     * Use [[QuickJSContext.newPromise]] to create a new promise instead of calling
     * this constructor directly.
     * @unstable
     */
    constructor(args: {
        context: QuickJSContext;
        promiseHandle: QuickJSHandle;
        resolveHandle: QuickJSHandle;
        rejectHandle: QuickJSHandle;
    });
    /**
     * Resolve [[handle]] with the given value, if any.
     * Calling this method after calling [[dispose]] is a no-op.
     *
     * Note that after resolving a promise, you may need to call
     * [[QuickJSContext.executePendingJobs]] to propagate the result to the promise's
     * callbacks.
     */
    resolve: (value?: QuickJSHandle) => void;
    /**
     * Reject [[handle]] with the given value, if any.
     * Calling this method after calling [[dispose]] is a no-op.
     *
     * Note that after rejecting a promise, you may need to call
     * [[QuickJSContext.executePendingJobs]] to propagate the result to the promise's
     * callbacks.
     */
    reject: (value?: QuickJSHandle) => void;
    get alive(): boolean;
    dispose: () => void;
    private disposeResolvers;
}