abort-signal.js•1.06 kB
const { addAbortListener } = require('../core/util')
const { RequestAbortedError } = require('../core/errors')
const kListener = Symbol('kListener')
const kSignal = Symbol('kSignal')
function abort (self) {
if (self.abort) {
self.abort(self[kSignal]?.reason)
} else {
self.reason = self[kSignal]?.reason ?? new RequestAbortedError()
}
removeSignal(self)
}
function addSignal (self, signal) {
self.reason = null
self[kSignal] = null
self[kListener] = null
if (!signal) {
return
}
if (signal.aborted) {
abort(self)
return
}
self[kSignal] = signal
self[kListener] = () => {
abort(self)
}
addAbortListener(self[kSignal], self[kListener])
}
function removeSignal (self) {
if (!self[kSignal]) {
return
}
if ('removeEventListener' in self[kSignal]) {
self[kSignal].removeEventListener('abort', self[kListener])
} else {
self[kSignal].removeListener('abort', self[kListener])
}
self[kSignal] = null
self[kListener] = null
}
module.exports = {
addSignal,
removeSignal
}