libtuer: add a fire_and_forget for python functions

diff --git a/libtuer.py b/libtuer.py
index 1789b90ce8c9307f22e06d9d5cdfe3623c456988..835bf6d51003e22dd8a2d5e3b9ed72e85fae0577 100644 (file)
--- a/libtuer.py
+++ b/libtuer.py
@@ -58,16 +58,26 @@ class Logger:
 
 logger = Logger()
 
+# run a Python command asynchronously
+def fire_and_forget(f):
+       def _fire_and_forget():
+               try:
+                       f()
+               except Exception as e:
+                       logger.critical("fire_and_forget: Got exception out of callback: %s" % str(e))
+                       logger.debug(traceback.format_exc())
+       t = threading.Thread(target=_fire_and_forget)
+       t.start()
+
 # run a command asynchronously and log the return value if not 0
 # prefix must be a string identifying the code position where the call came from
-def fire_and_forget (cmd, log, prefix):
-       def _fire_and_forget ():
+def fire_and_forget_cmd (cmd, log, prefix):
+       def _fire_and_forget_cmd ():
                with open("/dev/null", "w") as fnull:
                        retcode = subprocess.call(cmd, stdout=fnull, stderr=fnull)
                        if retcode is not 0:
                                logger.error("%sReturn code %d at command: %s" % (prefix,retcode,str(cmd)))
-       t = threading.Thread(target=_fire_and_forget)
-       t.start()
+       fire_and_forget(_fire_and_forget_cmd)
 
 # Threaded callback class
 class ThreadFunction():

diff --git a/statemachine.py b/statemachine.py
index a3c4affb860ed23733d41fbef7f4868f22c9889e..0f325a80ea93a61bad5a4ebfb61bf4533e341c47 100644 (file)
--- a/statemachine.py
+++ b/statemachine.py
@@ -11,7 +11,7 @@ def play_sound (what):
                logger.error("StateMachine: Unable to list sound files in %s" % (SOUNDS_DIRECTORY+what))
                return
        soundfile = SOUNDS_DIRECTORY + what + '/' + random.choice(soundfiles)
-       fire_and_forget ([SOUNDS_PLAYER,soundfile], logger.error, "StateMachine: ")
+       fire_and_forget_cmd ([SOUNDS_PLAYER,soundfile], logger.error, "StateMachine: ")
 
 
 # StateUnlocking constants
@@ -175,8 +175,7 @@ class StateMachine():
                                def _close_after_time():
                                        time.sleep(FALLBACK_LEAVE_DELAY_LOCK)
                                        self.actor().act(Actor.CMD_LOCK)
-                               t = threading.Thread(target=_close_after_time)
-                               t.start()
+                               fire_and_forget(_close_after_time)
                        # not calling superclass because we want to stay in fallback mode
                def handle_wakeup_event(self):
                        # blink red LED