Python win32event.WaitForMultipleObjects() Examples

def wait(self, state, interval=0.1, channel=None):
        """Wait for the given state(s), KeyboardInterrupt or SystemExit.

        Since this class uses native win32event objects, the interval
        argument is ignored.
        """
        if isinstance(state, (tuple, list)):
            # Don't wait for an event that beat us to the punch ;)
            if self.state not in state:
                events = tuple([self._get_state_event(s) for s in state])
                win32event.WaitForMultipleObjects(
                    events, 0, win32event.INFINITE)
        else:
            # Don't wait for an event that beat us to the punch ;)
            if self.state != state:
                event = self._get_state_event(state)
                win32event.WaitForSingleObject(event, win32event.INFINITE) 

def CollectorThread(stopEvent, file):
	win32trace.InitRead()
	handle = win32trace.GetHandle()
	# Run this thread at a lower priority to the main message-loop (and printing output)
	# thread can keep up
	import win32process
	win32process.SetThreadPriority(win32api.GetCurrentThread(), win32process.THREAD_PRIORITY_BELOW_NORMAL)

	try:
		while 1:
			rc = win32event.WaitForMultipleObjects((handle, stopEvent), 0, win32event.INFINITE)
			if rc == win32event.WAIT_OBJECT_0:
				# About the only char we can't live with is \0!
				file.write(win32trace.read().replace("\0", "<null>"))
			else:
				# Stop event
				break
	finally:
		win32trace.TermRead()
		print "Thread dieing" 

def Run(self):
		while 1:
			handles = [self.stopEvent, self.adminEvent]
			if self.watchEvent is not None:
				handles.append(self.watchEvent)
			rc = win32event.WaitForMultipleObjects(handles, 0, win32event.INFINITE)
			if rc == win32event.WAIT_OBJECT_0:
				break
			elif rc == win32event.WAIT_OBJECT_0+1:
				self.RefreshEvent()
			else:
				win32api.PostMessage(self.hwnd, MSG_CHECK_EXTERNAL_FILE, 0, 0)
				try:
					# If the directory has been removed underneath us, we get this error.
					win32api.FindNextChangeNotification(self.watchEvent)
				except win32api.error, exc:
					print "Can not watch file", self.doc.GetPathName(), "for changes -", exc.strerror
					break

		# close a circular reference 

def wait(self, state, interval=0.1, channel=None):
        """Wait for the given state(s), KeyboardInterrupt or SystemExit.

        Since this class uses native win32event objects, the interval
        argument is ignored.
        """
        if isinstance(state, (tuple, list)):
            # Don't wait for an event that beat us to the punch ;)
            if self.state not in state:
                events = tuple([self._get_state_event(s) for s in state])
                win32event.WaitForMultipleObjects(
                    events, 0, win32event.INFINITE)
        else:
            # Don't wait for an event that beat us to the punch ;)
            if self.state != state:
                event = self._get_state_event(state)
                win32event.WaitForSingleObject(event, win32event.INFINITE) 

def wait(self, state, interval=0.1, channel=None):
        """Wait for the given state(s), KeyboardInterrupt or SystemExit.

        Since this class uses native win32event objects, the interval
        argument is ignored.
        """
        if isinstance(state, (tuple, list)):
            # Don't wait for an event that beat us to the punch ;)
            if self.state not in state:
                events = tuple([self._get_state_event(s) for s in state])
                win32event.WaitForMultipleObjects(
                    events, 0, win32event.INFINITE)
        else:
            # Don't wait for an event that beat us to the punch ;)
            if self.state != state:
                event = self._get_state_event(state)
                win32event.WaitForSingleObject(event, win32event.INFINITE) 

def wait(self, state, interval=0.1, channel=None):
        """Wait for the given state(s), KeyboardInterrupt or SystemExit.

        Since this class uses native win32event objects, the interval
        argument is ignored.
        """
        if isinstance(state, (tuple, list)):
            # Don't wait for an event that beat us to the punch ;)
            if self.state not in state:
                events = tuple([self._get_state_event(s) for s in state])
                win32event.WaitForMultipleObjects(
                    events, 0, win32event.INFINITE)
        else:
            # Don't wait for an event that beat us to the punch ;)
            if self.state != state:
                event = self._get_state_event(state)
                win32event.WaitForSingleObject(event, win32event.INFINITE) 

def wait(self, state, interval=0.1, channel=None):
        """Wait for the given state(s), KeyboardInterrupt or SystemExit.
        
        Since this class uses native win32event objects, the interval
        argument is ignored.
        """
        if isinstance(state, (tuple, list)):
            # Don't wait for an event that beat us to the punch ;)
            if self.state not in state:
                events = tuple([self._get_state_event(s) for s in state])
                win32event.WaitForMultipleObjects(events, 0, win32event.INFINITE)
        else:
            # Don't wait for an event that beat us to the punch ;)
            if self.state != state:
                event = self._get_state_event(state)
                win32event.WaitForSingleObject(event, win32event.INFINITE) 

def connect_thread_runner(self, expect_payload, giveup_event):
        # As Windows 2000 doesn't do ConnectEx, we need to use a non-blocking
        # accept, as our test connection may never come.  May as well use
        # AcceptEx for this...
        listener = socket.socket()
        self.addr = ('localhost', random.randint(10000,64000))
        listener.bind(self.addr)
        listener.listen(1)

        # create accept socket
        accepter = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        # An overlapped
        overlapped = pywintypes.OVERLAPPED()
        overlapped.hEvent = win32event.CreateEvent(None, 0, 0, None)
        # accept the connection.
        if expect_payload:
            buf_size = 1024
        else:
            # when we don't expect data we must be careful to only pass the
            # exact number of bytes for the endpoint data...
            buf_size = win32file.CalculateSocketEndPointSize(listener)

        buffer = win32file.AllocateReadBuffer(buf_size)
        win32file.AcceptEx(listener, accepter, buffer, overlapped)
        # wait for the connection or our test to fail.
        events = giveup_event, overlapped.hEvent
        rc = win32event.WaitForMultipleObjects(events, False, 2000)
        if rc == win32event.WAIT_TIMEOUT:
            self.fail("timed out waiting for a connection")
        if rc == win32event.WAIT_OBJECT_0:
            # Our main thread running the test failed and will never connect.
            return
        # must be a connection.
        nbytes = win32file.GetOverlappedResult(listener.fileno(), overlapped, False)
        if expect_payload:
            self.request = buffer[:nbytes]
        accepter.send(str2bytes('some expected response')) 

def pacemaker(self, timeout=60):
    #   This is a stand-alone heartbeat generator.  To pulse from your own control loop,
    #   call your AbstractLog subclass instance event handler (e.g. AbstractLog['event']()
        def __target(timeout=60):
            if platform.uname()[0].lower() == "windows":
                import win32con
                import win32event
                self.running = True
                kill = win32event.CreateEvent(None, 1, 0, None)
                pulse = win32event.CreateWaitableTimer(None, 0, None)
                win32event.SetWaitableTimer(pulse, 0, timeout*1000, None, None, False)
                while(self.running):
                    try:
                        result = win32event.WaitForMultipleObjects([kill, pulse], False, 1000)
                        
                        # if kill signal received, break loop
                        if(result == win32con.WAIT_OBJECT_0): break
                        # elif timeout has passed, generate a pulse
                        elif(result == win32con.WAIT_OBJECT_0 + 1): self['event']()
                    except:
                        self.notifyOfError("Pacemaker shutdown.  Heartbeats will not be generated.")
                        win32event.SetEvent(kill)
            elif self.options['Verbose']: print "Pacemaker only supported in Windows at this time. " 
       
        try:
            self.thread = threading.Thread(target=__target, args=(timeout,) )
            self.thread.start()
        except:
            self.notifyOfError("Pacemaker thread exception.  Heartbeats will not be generated.") 

def is_modified(self, buffer):
        print "path", self.path
        result = win32file.ReadDirectoryChangesW(
             self.handle,
             buffer,
             True,
                win32con.FILE_NOTIFY_CHANGE_FILE_NAME 
              | win32con.FILE_NOTIFY_CHANGE_DIR_NAME
              | win32con.FILE_NOTIFY_CHANGE_ATTRIBUTES
              | win32con.FILE_NOTIFY_CHANGE_SIZE
              | win32con.FILE_NOTIFY_CHANGE_LAST_WRITE
              | win32con.FILE_NOTIFY_CHANGE_SECURITY,
             self.overlapped,
            )
        print "result  1", result
        result = win32event.WaitForMultipleObjects([self.overlapped.hEvent], True, 0)
        print "result  2", result
        if result != win32event.WAIT_TIMEOUT:
#            result = win32file.GetOverlappedResult(self.handle, self.overlapped, False)
            return True
        else:
            return False


#===========================================================================
# Directory monitor class.