X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/4f9482a7c46d5930b309a5796c39f81efa3989ae..fce36f5a8b88722b94b7c60266fb0fc72b2bc10c:/waker.py

diff --git a/waker.py b/waker.py
index 7b212a1..79eff81 100644
--- a/waker.py
+++ b/waker.py
@@ -1,13 +1,43 @@
 from libtuer import ThreadRepeater
-from statemachine import StateMachine
+from threading import Lock
+
+SLEEP_TIME = 0.5
+
+class ToBeWoken:
+	'''a simple struct storing information about a to-be-woken function'''
+	def __init__(self, f, period, one_shot):
+		self.f = f
+		self.period = period
+		self.time_since_call = 0
+		self.one_shot = one_shot
 
 class Waker():
-	def __init__(self, sm):
-		self._sm = sm
-		self._t = ThreadRepeater(self._wake, 0.5, name="Waker")
+	def __init__(self):
+		self._tobewokens = []
+		self._tobewokens_lock = Lock()
+		self._t = ThreadRepeater(self._wake, SLEEP_TIME, name="Waker")
+	
+	def register(self, f, time, one_shot = False):
+		'''Register a function which is called approximately every <time> seconds (or just once, if one_shot is True). f should return quickly, or it will delay the waker!'''
+		time = max(time//SLEEP_TIME, 1)
+		with self._tobewokens_lock:
+			self._tobewokens.append(ToBeWoken(f, time, one_shot))
 	
 	def _wake(self):
-		self._sm.callback(StateMachine.CMD_WAKEUP)
+		with self._tobewokens_lock:
+			delete = []
+			# run the functions we ought to run
+			for tobewoken, idx in zip(self._tobewokens, range(len(self._tobewokens))):
+				tobewoken.time_since_call += 1
+				if tobewoken.time_since_call >= tobewoken.period:
+					tobewoken.f()
+					tobewoken.time_since_call = 0
+					if tobewoken.one_shot:
+						delete.append(idx)
+			# delete what we have to delete - in reverse order so the indices stay valid!
+			delete.reverse()
+			for idx in delete:
+				del self._tobewokens[idx]
 	
 	def stop(self):
 		self._t.stop()