Permalink
Cannot retrieve contributors at this time
128 lines (102 sloc)
2.85 KB
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
codeql-action/node_modules/ava/lib/plugin-support/shared-workers.js
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import events from 'node:events'; | |
import {pathToFileURL} from 'node:url'; | |
import {Worker} from 'node:worker_threads'; | |
import serializeError from '../serialize-error.js'; | |
const LOADER = new URL('shared-worker-loader.js', import.meta.url); | |
const launchedWorkers = new Map(); | |
const waitForAvailable = async worker => { | |
for await (const [message] of events.on(worker, 'message')) { | |
if (message.type === 'available') { | |
return; | |
} | |
} | |
}; | |
function launchWorker(filename, initialData) { | |
if (launchedWorkers.has(filename)) { | |
return launchedWorkers.get(filename); | |
} | |
const worker = new Worker(LOADER, { | |
// Ensure the worker crashes for unhandled rejections, rather than allowing undefined behavior. | |
execArgv: ['--unhandled-rejections=strict'], | |
workerData: { | |
filename, | |
initialData, | |
}, | |
}); | |
worker.setMaxListeners(0); | |
const launched = { | |
statePromises: { | |
available: waitForAvailable(worker), | |
error: events.once(worker, 'error').then(([error]) => error), | |
}, | |
exited: false, | |
worker, | |
}; | |
launchedWorkers.set(filename, launched); | |
worker.once('exit', () => { | |
launched.exited = true; | |
}); | |
return launched; | |
} | |
export async function observeWorkerProcess(fork, runStatus) { | |
let signalDone; | |
const done = new Promise(resolve => { | |
signalDone = () => { | |
resolve(); | |
}; | |
}); | |
const activeInstances = new Set(); | |
const removeInstance = instance => { | |
instance.worker.unref(); | |
activeInstances.delete(instance); | |
if (activeInstances.size === 0) { | |
signalDone(); | |
} | |
}; | |
const removeAllInstances = () => { | |
if (activeInstances.size === 0) { | |
signalDone(); | |
return; | |
} | |
for (const instance of activeInstances) { | |
removeInstance(instance); | |
} | |
}; | |
fork.promise.finally(() => { | |
removeAllInstances(); | |
}); | |
fork.onConnectSharedWorker(async ({filename, initialData, port, signalError}) => { | |
const launched = launchWorker(filename, initialData); | |
activeInstances.add(launched); | |
const handleWorkerMessage = async message => { | |
if (message.type === 'deregistered-test-worker' && message.id === fork.threadId) { | |
launched.worker.off('message', handleWorkerMessage); | |
removeInstance(launched); | |
} | |
}; | |
launched.statePromises.error.then(error => { | |
launched.worker.off('message', handleWorkerMessage); | |
removeAllInstances(); | |
runStatus.emitStateChange({type: 'shared-worker-error', err: serializeError('Shared worker error', true, error)}); | |
signalError(); | |
}); | |
try { | |
await launched.statePromises.available; | |
port.postMessage({type: 'ready'}); | |
launched.worker.postMessage({ | |
type: 'register-test-worker', | |
id: fork.threadId, | |
file: pathToFileURL(fork.file).toString(), | |
port, | |
}, [port]); | |
fork.promise.finally(() => { | |
launched.worker.postMessage({ | |
type: 'deregister-test-worker', | |
id: fork.threadId, | |
}); | |
}); | |
launched.worker.on('message', handleWorkerMessage); | |
} catch {} | |
}); | |
return done; | |
} |