mutexify

mutexify

Bike shed mutex lock implementation in node.js

npm install mutexify

Hasn't this been done before? Yes but the specific semantics of this made some of my code simpler

Usage

var mutexify = require('mutexify')
var lock = mutexify()

lock(function(release) {
  console.log('i am now locked')
  setTimeout(function() {
    release()
  }, 1000)
})

lock(function(release) {
  console.log('1 second later')
  release()
})

A common pattern is to call a callback after you release the lock. To do this in a one-liner pass the callback and the value to release(cb, err, value)

var write = function(data, cb) {
  lock(function(release) {
    fs.writeFile('locked-file.txt', data, release.bind(null, cb))
  }) 
}

License

MIT