how can i use async api in b-thread?

[stormslowly]

in your example, all calls in b-threads are sync functions. but in a real case, I will use some async functions (eg. HTTP request) how can I do that?

[lmatteis]

Sorry for the late reply @stormslowly

Essentially you can use promises in the function generators and dynamically create another b-thread that requests an event:

bp.addBThread('foo', ++priority, function *() {
  yield { wait: 'addHot' }
  callSomePromise()
    .then(() => bp.addBThread('bar', ++priority, function *() {
      yield { request: 'promiseResolved' }
    }))
});
// another b-thread can wait for 'promiseResolved'
function *() {
  yield { wait: 'promiseResolved' }
  // do something else
}