- while not self.quit:
- try:
- io_events = poller.poll()
- except select.error, err:
- # EINTR can happen when signals are sent
- if err.args and err.args[0] in (errno.EINTR,):
- io_events = None
- else:
- raise
-
- if io_events:
- # Check for I/O events
- for (evfd, evcond) in io_events:
- for (owner, fd, conditions) in self._io_wait:
- if fd == evfd and evcond & conditions:
- owner.OnIO(fd, evcond)
-
- # Check whether signal was raised
- if self.sigchld_handler.called:
- for owner in self._signal_wait:
- owner.OnSignal(signal.SIGCHLD)
- self.sigchld_handler.Clear()
-
- if self.sigterm_handler.called:
- self.quit = True
- self.sigterm_handler.Clear()
+ if handle_sigterm:
+ sigterm_handler = utils.SignalHandler([signal.SIGTERM])
+ else:
+ sigterm_handler = None
+
+ try:
+ running = True
+ timeout = None
+ timeout_needs_update = True
+
+ # Start actual main loop
+ while running:
+ # Entries could be added again afterwards, hence removing first
+ if self._io_wait_remove:
+ for fd in self._io_wait_remove:
+ try:
+ poller.unregister(fd)
+ except KeyError:
+ pass
+ try:
+ del self._io_wait[fd]
+ except KeyError:
+ pass
+ self._io_wait_remove = []
+
+ # Add new entries
+ if self._io_wait_add:
+ for (owner, fd, conditions) in self._io_wait_add:
+ self._io_wait[fd] = owner
+ poller.register(fd, conditions)
+ self._io_wait_add = []
+
+ # Add new timers
+ if self._timer_add:
+ timeout_needs_update = True
+ for timer in self._timer_add:
+ self._timer[timer.timer_id] = timer
+ del self._timer_add[:]
+
+ # Remove timers
+ if self._timer_remove:
+ timeout_needs_update = True
+ for timer_id in self._timer_remove:
+ try:
+ del self._timer[timer_id]
+ except KeyError:
+ pass
+ del self._timer_remove[:]
+
+ # Stop if nothing is listening anymore
+ if stop_on_empty and not (self._io_wait or self._timer):
+ break
+
+ # Calculate timeout again if required
+ if timeout_needs_update:
+ timeout = self._CalcTimeout(time.time())
+ timeout_needs_update = False
+
+ # Wait for I/O events
+ try:
+ io_events = poller.poll(timeout)
+ except select.error, err:
+ # EINTR can happen when signals are sent
+ if err.args and err.args[0] in (errno.EINTR,):
+ io_events = None
+ else:
+ raise
+
+ after_poll = time.time()
+
+ if io_events:
+ # Check for I/O events
+ for (evfd, evcond) in io_events:
+ owner = self._io_wait.get(evfd, None)
+ if owner:
+ owner.OnIO(evfd, evcond)
+
+ if self._timer:
+ self._CheckTimers(after_poll)
+
+ # Check whether signal was raised
+ if sigchld_handler and sigchld_handler.called:
+ self._CallSignalWaiters(signal.SIGCHLD)
+ sigchld_handler.Clear()
+
+ if sigterm_handler and sigterm_handler.called:
+ self._CallSignalWaiters(signal.SIGTERM)
+ running = False
+ sigterm_handler.Clear()
+ finally:
+ # Restore signal handlers
+ if sigterm_handler:
+ sigterm_handler.Reset()