control-c fixes

sleekxmpp/xmlstream/scheduler.py

@@ -31,11 +31,12 @@ class Task(object):
 
 class Scheduler(object):
 	"""Threaded scheduler that allows for updates mid-execution unlike http://docs.python.org/library/sched.html#module-sched"""
-	def __init__(self):
+	def __init__(self, parentqueue=None):
 		self.addq = queue.Queue()
 		self.schedule = []
 		self.thread = None
 		self.run = False
+		self.parentqueue = parentqueue
 	
 	def process(self, threaded=True):
 		if threaded:
@@ -47,29 +48,37 @@ class Scheduler(object):
 	def _process(self):
 		self.run = True
 		while self.run:
-			wait = 5
-			updated = False
-			if self.schedule:
-				wait = self.schedule[0].next - time.time()
 			try:
-				newtask = self.addq.get(True, wait)
-			except queue.Empty:
-				cleanup = []
-				for task in self.schedule:
-					if time.time() >= task.next:
-						updated = True
-						if not task.run():
-							cleanup.append(task)
+				wait = 5
+				updated = False
+				if self.schedule:
+					wait = self.schedule[0].next - time.time()
+				try:
+					if wait <= 0.0:
+						newtask = self.addq.get(False)
 					else:
-						break
-				for task in cleanup:
-					x = self.schedule.pop(self.schedule.index(task))
-			else:
-				updated = True
-				self.schedule.append(newtask)
-			finally:
-				if updated: self.schedule = sorted(self.schedule, key=lambda task: task.next)
+						newtask = self.addq.get(True, wait)
+				except queue.Empty:
+					cleanup = []
+					for task in self.schedule:
+						if time.time() >= task.next:
+							updated = True
+							if not task.run():
+								cleanup.append(task)
+						else:
+							break
+					for task in cleanup:
+						x = self.schedule.pop(self.schedule.index(task))
+				else:
+					updated = True
+					self.schedule.append(newtask)
+				finally:
+					if updated: self.schedule = sorted(self.schedule, key=lambda task: task.next)
+			except KeyboardInterrupt:
+				self.run = False
 		logging.debug("Qutting Scheduler thread")
+		if self.parentqueue is not None:
+			self.parentqueue.put(('quit', None, None))
 
 	def add(self, name, seconds, callback, args=None, kwargs=None, repeat=False, qpointer=None):
 		self.addq.put(Task(name, seconds, callback, args, kwargs, repeat, qpointer))