def do_run(self):
trellis.change_attr(self, '_scheduled', False)
ctrl = trellis.ctrl
ctrl.current_listener = self
try:
try:
self._step()
# process writes as if from a non-rule perspective
writes = ctrl.writes
has_run = ctrl.has_run.get
while writes:
subject, writer = writes.popitem()
for dependent in subject.iter_listeners():
if has_run(dependent) is not self:
if dependent.dirty():
ctrl.schedule(dependent)
# process reads in normal fashion
ctrl._process_reads(self)
except:
ctrl.reads.clear()
ctrl.writes.clear()
raise
finally:
ctrl.current_listener = None
def dirty(self):
if not self._scheduled:
trellis.change_attr(self, '_scheduled', True)
trellis.on_commit(self._loop.call, trellis.atomically, self.do_run)
return False
def _set(self, when):
trellis.change_attr(self, '_now', when)
self._tick = when