@arrows/worker/transfer.js

Simple, promise-based API for native worker threads (with pools)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const types_1 = require("./types");
exports.transferKey = types_1.transferKey;
/**
 * Wraps a worker handler so you can add a transfer list for the result.
 *
 * Works only if the result is an instance of a Buffer or a TypedArray.
 *
 * @param handler - Handler function
 * @param mapperFn - Takes the result and should produce a transfer list.
 * @returns A wrapped handler whose result will be moved rather than cloned.
 */
const transfer = (handler, mapperFn) => (payload, workerData) => {
    const result = handler(payload, workerData);
    const transferList = mapperFn(result);
    return {
        result,
        [types_1.transferKey]: transferList,
    };
};
exports.transfer = transfer;
exports.default = transfer;