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607aa3ac82
Add an optional callback parameter to `ChildProcess.prototype.send()`
that is invoked when the message has been sent.
Juggle the control channel's reference count so that in-flight messages
keep the event loop (and therefore the process) alive until they have
been sent.
`ChildProcess.prototype.send()` and `process.send()` used to operate
synchronously but became asynchronous in commit libuv/libuv@393c1c5
("unix: set non-block mode in uv_{pipe,tcp,udp}_open"), which landed
in io.js in commit 07bd05b ("deps: update libuv to 1.2.1").
Fixes: https://github.com/nodejs/node/issues/760
PR-URL: https://github.com/nodejs/node/pull/2620
Reviewed-By: trevnorris - Trevor Norris <trev.norris@gmail.com>
Reviewed-By: jasnell - James M Snell <jasnell@gmail.com>
20 lines
579 B
JavaScript
20 lines
579 B
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const fork = require('child_process').fork;
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if (process.argv[2] === 'child') {
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process.send('ok', common.mustCall(function(err) {
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assert.strictEqual(err, null);
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}));
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} else {
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const child = fork(process.argv[1], ['child']);
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child.on('message', common.mustCall(function(message) {
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assert.strictEqual(message, 'ok');
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}));
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child.on('exit', common.mustCall(function(exitCode, signalCode) {
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assert.strictEqual(exitCode, 0);
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assert.strictEqual(signalCode, null);
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}));
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}
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