Package Exports

lock

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (lock) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

lock

lock asynchronous resources.

Simple Example

var Lock = require('lock').Lock
var lock = Lock()

lock('key', function (release) { //called when resource is available.

  //do an async operation, and wrap the callback with release.
  someAsyncOperation(args,..., release(function (err) {
    //'key' is now unlocked!
  })
})

Multiple Locks at Once.

var Lock = require('lock').Lock
var lock = Lock()

lock(['A', 'B', 'C'], function (release) { //called, when ALL
                                           //resources are available.

  //do an async operation, and wrap the callback with release(cb)
  someAsyncOperation(args,..., release(function (err) {
    //A, B & C are now unlocked!
  })
})

Lock with optional callback.

var Lock = require('lock').Lock
var lock = Lock()

lock('cache', function(release) { //called when no one is writing to cache
    //we do not care if this fails since its a cache so no callback needed
    fs.writeFile(fileCache, ... , release())
})

used in level-update

License

MIT