https://github.com/reconbot/uv-poll

https://github.com/reconbot/uv-poll

Last synced: 6 days ago
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• Host: GitHub
• URL: https://github.com/reconbot/uv-poll
• Owner: reconbot
• Created: 2017-07-09T03:20:12.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2017-07-09T16:27:07.000Z (over 7 years ago)
• Last Synced: 2024-10-10T22:41:09.300Z (about 1 month ago)
• Language: C++
• Size: 6.84 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# uv-poll

It's like UV_POLL_T but javascript

This is ripped from [node serialport](https://github.com/EmergingTechnologyAdvisors/node-serialport) internals. It's an event emitter wrapper for [libuv's UV_POLL_T struct](http://docs.libuv.org/en/v1.x/poll.html).

The underlying event stream is continuous so instead of emitting all of them we ask for the next one. This can be done two ways.

- `poll.once(event, callback)` this automatically calls `poll()` for the correct event

- `poll.poll(eventInt)` asks `uv_poll_start` to poll for these additional events

```js

const fd = fs.openSync('file')

const poll = new Poller(fd)

poll.once('readable', () => console.log(`fd ${fd} is now readable`))

poll.once('writable', () => console.log(`fd ${fd} is now writable`))

poll.once('disconnect', () => console.log(`fd ${fd} is now disconnect`)) // means not readable or writable

```

This is tested pretty heavily in serialport. Happy to land any any improvements, tests, or fixes.