File: index.js

package info (click to toggle)
npm 9.2.0~ds1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 318,988 kB
  • sloc: javascript: 167,820; sh: 194; makefile: 52; perl: 11
file content (43 lines) | stat: -rw-r--r-- 768 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
const defLimit = require('os').cpus().length
const callLimit = (queue, limit = defLimit) => new Promise((res, rej) => {
  let active = 0
  let current = 0
  const results = []

  let rejected = false
  const reject = er => {
    if (rejected)
      return
    rejected = true
    rej(er)
  }

  let resolved = false
  const resolve = () => {
    if (resolved || active > 0)
      return
    resolved = true
    res(results)
  }

  const run = () => {
    const c = current++
    if (c >= queue.length) {
      return resolve()
    }

    active ++
    results[c] = queue[c]().then(result => {
      active --
      results[c] = result
      run()
      return result
    }, reject)
  }

  for (let i = 0; i < limit; i++) {
    run()
  }
})

module.exports = callLimit