static void _schedulePriorityAsyncCallback(ZoneCallback callback)
{
var state = _getState();
if (state._nextCallback == null)
{
_scheduleAsyncCallback(callback);
state._lastPriorityCallback = state._lastCallback;
return;
}
_AsyncCallbackEntry entry = new _AsyncCallbackEntry(callback);
if (state._lastPriorityCallback == null)
{
entry.next = state._nextCallback;
state._nextCallback = state._lastPriorityCallback = entry;
}
else
{
entry.next = state._lastPriorityCallback.next;
state._lastPriorityCallback.next = entry;
state._lastPriorityCallback = entry;
if (entry.next == null)
{
state._lastCallback = entry;
}
}
}
static void _microtaskLoop()
{
var state = _getState();
while (state._nextCallback != null)
{
state._lastPriorityCallback = null;
_AsyncCallbackEntry entry = state._nextCallback;
state._nextCallback = entry.next;
if (state._nextCallback == null)
{
state._lastCallback = null;
}
entry.callback();
}
}
static void _scheduleAsyncCallback(ZoneCallback callback)
{
var state = _getState();
_AsyncCallbackEntry newEntry = new _AsyncCallbackEntry(callback);
if (state._nextCallback == null)
{
state._nextCallback = state._lastCallback = newEntry;
if (!state._isInCallbackLoop)
{
_AsyncRun._scheduleImmediate(_startMicrotaskLoop);
}
}
else
{
state._lastCallback.next = newEntry;
state._lastCallback = newEntry;
}
}
