def __process_queues(self, timer, context):
# Die when asked to.
self.lock.acquire()
if self.die:
CFRunLoopStop(CFRunLoopGetCurrent())
self.lock.release()
# Process add queue.
self.lock.acquire()
if not self.add_queue.empty():
(path, event_mask) = self.add_queue.get()
self.lock.release()
self.__add_dir(path, event_mask)
else:
self.lock.release()
# Process remove queue.
self.lock.acquire()
if not self.remove_queue.empty():
path = self.add_queue.get()
self.lock.release()
self.__remove_dir(path)
else:
self.lock.release()
# Ensure all monitored paths are actually being monitored. If they're
# not yet being monitored, start doing so.
for path in self.monitored_paths.keys():
if self.monitored_paths[path].monitoring:
continue
streamRef = self.monitored_paths[path].fsmonitor_ref
# Schedule stream on a loop.
FSEventStreamScheduleWithRunLoop(streamRef, CFRunLoopGetCurrent(),
kCFRunLoopDefaultMode)
# Register with the FS Events service to receive events.
started = FSEventStreamStart(streamRef)
if not started:
raise CouldNotStartError
else:
self.monitored_paths[path].monitoring = True
# Generate the missed events.
# TODO: use FSEvents' sinceWhen parameter instead of the current
# inefficient scanning method.
if self.persistent:
FSMonitor.generate_missed_events(self, path)
def run(self):
pool = AppKit.NSAutoreleasePool.alloc().init()
self._run_loop = CFRunLoopGetCurrent()
FSEventStreamScheduleWithRunLoop(self._stream_ref, self._run_loop,
kCFRunLoopDefaultMode)
if not FSEventStreamStart(self._stream_ref):
FSEventStreamInvalidate(self._stream_ref)
FSEventStreamRelease(self._stream_ref)
raise IOError('FSEvents. Could not start stream.')
CFRunLoopRun()
FSEventStreamStop(self._stream_ref)
FSEventStreamInvalidate(self._stream_ref)
FSEventStreamRelease(self._stream_ref)
del pool
self._queue.put(None)
def run(self):
# Necessary because we're using PyObjC in a thread other than the main
# thread.
self.auto_release_pool = NSAutoreleasePool.alloc().init()
# Setup. Ensure that this isn't interleaved with any other thread, so
# that the DB setup continues as expected.
self.lock.acquire()
FSMonitor.setup(self)
self.lock.release()
# Set up a callback to a function that process the queues frequently.
CFRunLoopAddTimer(
CFRunLoopGetCurrent(),
CFRunLoopTimerCreate(None, CFAbsoluteTimeGetCurrent(), 0.5, 0, 0,
self.__process_queues, None),
kCFRunLoopDefaultMode)
# Start the run loop.
CFRunLoopRun()