epoll/test/two-shot.js

A low-level Node.js binding for the Linux epoll API

'use strict';

/*
 * Make sure two EPOLLONESHOT events can be handled.
 *
 * This test expects a newline as input on stdin.
 */
const Epoll = require('../').Epoll;
const util = require('./util');

const stdin = 0; // fd for stdin

let eventCount = 0;

const epoll = new Epoll((err, fd, events) => {
  eventCount += 1;

  if (eventCount === 1) {
    setTimeout(_ => {
      epoll.modify(fd, Epoll.EPOLLIN | Epoll.EPOLLONESHOT);
    }, 100);
  } else if (eventCount === 2) {
    setTimeout(_ => {
      util.read(fd); // read stdin (the newline)
      epoll.remove(fd).close();
    }, 100);
  } else {
    console.log('*** Error: unexpected event');
  }
});

epoll.add(stdin, Epoll.EPOLLIN | Epoll.EPOLLONESHOT);