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'use strict'; module.exports = { sendHelper, internal }; const callbacks = new Map(); var seq = 0; function sendHelper(proc, message, handle, cb) { if (!proc.connected) return false; // Mark message as internal. See INTERNAL_PREFIX in lib/child_process.js message = { cmd: 'NODE_CLUSTER', ...message, seq }; if (typeof cb === 'function') callbacks.set(seq, cb); seq += 1; return proc.send(message, handle); } // Returns an internalMessage listener that hands off normal messages // to the callback but intercepts and redirects ACK messages. function internal(worker, cb) { return function onInternalMessage(message, handle) { if (message.cmd !== 'NODE_CLUSTER') return; var fn = cb; if (message.ack !== undefined) { const callback = callbacks.get(message.ack); if (callback !== undefined) { fn = callback; callbacks.delete(message.ack); } } fn.apply(worker, arguments); }; }