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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);
};
}