import { System } from './system';
import { ChannelMethods, RequestChannel } from './task_channels';
/** Should the task be run in the same or a different process. */
export declare enum TaskProcess {
    /** Run the task consumer in the same process. */
    IN_PROCESS = 0,
    /** Run the task consumer in another process. */
    OUT_OF_PROCESS = 1
}
export interface HandshakeRequest {
    readyAsync(): Promise<void>;
}
export interface TeardownRequest {
    teardownAsync(): Promise<void>;
}
/** Task creation options */
interface Options {
    /** Should the task be run in the same process or an external process. */
    process: TaskProcess;
    /**
     * Absolute path without file extension to the a file that injects methods
     * into data sent by producer.
     */
    bridgePath: string;
    /** Absolute path without file extension to the entry to the task consumer. */
    entryPath: string;
}
export declare function resolveBuiltinModuleAsync(sys: System, workingdir: string, ...modulePath: string[]): Promise<string>;
/**
 * Create a task consumer for some work.
 *
 * @param sys Host system
 * @param producer Representation of the task producer to the task consumer
 * @param options Task options
 */
export declare function createTaskAsync<Producer extends ChannelMethods<Producer> & HandshakeRequest, Consumer extends ChannelMethods<Consumer> & TeardownRequest>(sys: System, producer: Producer, { process, bridgePath, entryPath }: Options): Promise<RequestChannel<Consumer>>;
export {};