Python Queue.put方法代码示例

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
 def stop(self, reason="proxy terminating", skip_proto=None):
     log.info("stop(%s, %s)", reason, skip_proto)
     self.exit = True
     if self.control_socket_path:
         try:
             os.unlink(self.control_socket_path)
         except:
             pass
         self.control_socket_path = None
     try:
         self.control_socket.close()
     except:
         pass
     self.main_queue.put(None)
     #empty the main queue:
     q = Queue()
     q.put(None)
     self.main_queue = q
     #empty the encode queue:
     q = Queue()
     q.put(None)
     self.encode_queue = q
     for proto in (self.client_protocol, self.server_protocol):
         if proto and proto!=skip_proto:
             log("sending disconnect to %s", proto)
             proto.flush_then_close(["disconnect", SERVER_SHUTDOWN, reason])

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
 def stop(self, reason="proxy terminating", skip_proto=None):
     debug("stop(%s, %s)", reason, skip_proto)
     self.main_queue.put(None)
     #empty the main queue:
     q = Queue()
     q.put(None)
     self.main_queue = q
     for proto in (self.client_protocol, self.server_protocol):
         if proto and proto!=skip_proto:
             proto.flush_then_close(["disconnect", reason])

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
class Invoker(QtCore.QObject):
    def __init__(self):
        super(Invoker, self).__init__()
        self.queue = Queue()

    def invoke(self, func, *args):
        f = lambda: func(*args)
        self.queue.put(f)
        QtCore.QMetaObject.invokeMethod(self, "handler", QtCore.Qt.QueuedConnection)

    @QtCore.pyqtSlot()
    def handler(self):
        f = self.queue.get()
        f()

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
class Worker_Thread(Thread):
    """
        A background thread which calls the functions we post to it.
        The functions are placed in a queue and only called once,
        when this thread gets around to it.
    """

    def __init__(self):
        Thread.__init__(self, name="Worker_Thread")
        self.items = Queue()
        self.exit = False
        self.setDaemon(True)

    def __repr__(self):
        return "Worker_Thread(items=%s, exit=%s)" % (self.items.qsize(), self.exit)

    def stop(self, force=False):
        if self.exit:
            return
        if force:
            if self.items.qsize()>0:
                log.warn("Worker stop: %s items in the queue will not be run!", self.items.qsize())
            self.exit = True
        else:
            if self.items.qsize()>0:
                log.info("waiting for %s items in work queue to complete", self.items.qsize())
        debug("Worker_Thread.stop(%s) %s items in work queue", force, self.items)
        self.items.put(None)

    def add(self, item):
        if self.items.qsize()>10:
            log.warn("Worker_Thread.items queue size is %s", self.items.qsize())
        self.items.put(item)

    def run(self):
        debug("Worker_Thread.run() starting")
        while not self.exit:
            item = self.items.get()
            if item is None:
                debug("Worker_Thread.run() found end of queue marker")
                self.exit = True
                break
            try:
                debug("Worker_Thread.run() calling %s (queue size=%s)", item, self.items.qsize())
                item()
            except:
                log.error("Error in worker thread processing item %s", item, exc_info=True)
        debug("Worker_Thread.run() ended (queue size=%s)", self.items.qsize())

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
class loopback_connection(Connection):
    """ a fake connection which just writes back whatever is sent to it """
    def __init__(self, *args):
        Connection.__init__(self, *args)
        self.queue = Queue()

    def read(self, n):
        self.may_abort("read")
        #FIXME: we don't handle n...
        return self.queue.get(True)

    def write(self, buf):
        self.may_abort("write")
        self.queue.put(buf)
        return len(buf)

    def may_abort(self, action):
        return False

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
 def terminate_queue_threads(self):
     log("terminate_queue_threads()")
     # the format thread will exit since closed is set too:
     self._source_has_more.set()
     # make the threads exit by adding the empty marker:
     exit_queue = Queue()
     for _ in range(10):  # just 2 should be enough!
         exit_queue.put(None)
     try:
         owq = self._write_queue
         self._write_queue = exit_queue
         owq.put_nowait(None)
     except:
         pass
     try:
         orq = self._read_queue
         self._read_queue = exit_queue
         orq.put_nowait(None)
     except:
         pass

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
class Worker_Thread(Thread):

    def __init__(self):
        Thread.__init__(self, name="Worker_Thread")
        self.items = Queue()
        self.exit = False
        self.setDaemon(True)

    def stop(self, force=False):
        if force:
            if self.items.qsize()>0:
                log.warn("Worker_Thread.stop(%s) %s items in work queue will not run!", force, self.items.qsize())
            self.exit = True
        else:
            if self.items.qsize()>0:
                log.info("waiting for %s items in work queue to complete", self.items.qsize())
        debug("Worker_Thread.stop(%s) %s items in work queue: ", force, self.items)
        self.items.put(None)

    def add(self, item):
        if self.items.qsize()>10:
            log.warn("Worker_Thread.items queue size is %s", self.items.qsize())
        self.items.put(item)

    def run(self):
        debug("Worker_Thread.run() starting")
        while not self.exit:
            item = self.items.get()
            if item is None:
                break
            try:
                debug("Worker_Thread.run() calling %s (queue size=%s)", item, self.items.qsize())
                item()
            except:
                log.error("Worker_Thread.run() error on %s", item, exc_info=True)
        debug("Worker_Thread.run() ended")

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
class subprocess_callee(object):
    """
    This is the callee side, wrapping the gobject we want to interact with.
    All the input received will be converted to method calls on the wrapped object.
    Subclasses should register the signal handlers they want to see exported back to the caller.
    The convenience connect_export(signal-name, *args) can be used to forward signals unmodified.
    You can also call send() to pass packets back to the caller.
    (there is no validation of which signals are valid or not)
    """
    def __init__(self, input_filename="-", output_filename="-", wrapped_object=None, method_whitelist=None):
        self.name = ""
        self.input_filename = input_filename
        self.output_filename = output_filename
        self.method_whitelist = method_whitelist
        self.large_packets = []
        #the gobject instance which is wrapped:
        self.wrapped_object = wrapped_object
        self.send_queue = Queue()
        self.protocol = None
        if HANDLE_SIGINT:
            #this breaks gobject3!
            signal.signal(signal.SIGINT, self.handle_signal)
        signal.signal(signal.SIGTERM, self.handle_signal)
        self.setup_mainloop()

    def setup_mainloop(self):
        glib = import_glib()
        self.mainloop = glib.MainLoop()
        self.idle_add = glib.idle_add
        self.timeout_add = glib.timeout_add
        self.source_remove = glib.source_remove


    def connect_export(self, signal_name, *user_data):
        """ gobject style signal registration for the wrapped object,
            the signals will automatically be forwarded to the wrapper process
            using send(signal_name, *signal_args, *user_data)
        """
        log("connect_export%s", [signal_name] + list(user_data))
        args = list(user_data) + [signal_name]
        self.wrapped_object.connect(signal_name, self.export, *args)

    def export(self, *args):
        signal_name = args[-1]
        log("export(%s, ...)", signal_name)
        data = args[1:-1]
        self.send(signal_name, *list(data))


    def start(self):
        self.protocol = self.make_protocol()
        self.protocol.start()
        try:
            self.run()
            return 0
        except KeyboardInterrupt as e:
            if str(e):
                log.warn("%s", e)
            return 0
        except Exception:
            log.error("error in main loop", exc_info=True)
            return 1
        finally:
            self.cleanup()
            if self.protocol:
                self.protocol.close()
                self.protocol = None
            if self.input_filename=="-":
                try:
                    self._input.close()
                except:
                    pass
            if self.output_filename=="-":
                try:
                    self._output.close()
                except:
                    pass

    def make_protocol(self):
        #figure out where we read from and write to:
        if self.input_filename=="-":
            #disable stdin buffering:
            self._input = os.fdopen(sys.stdin.fileno(), 'rb', 0)
            setbinarymode(self._input.fileno())
        else:
            self._input = open(self.input_filename, 'rb')
        if self.output_filename=="-":
            #disable stdout buffering:
            self._output = os.fdopen(sys.stdout.fileno(), 'wb', 0)
            setbinarymode(self._output.fileno())
        else:
            self._output = open(self.output_filename, 'wb')
        #stdin and stdout wrapper:
        conn = TwoFileConnection(self._output, self._input, abort_test=None, target=self.name, socktype=self.name, close_cb=self.net_stop)
        conn.timeout = 0
        protocol = Protocol(self, conn, self.process_packet, get_packet_cb=self.get_packet)
        setup_fastencoder_nocompression(protocol)
        protocol.large_packets = self.large_packets
        return protocol

#.........这里部分代码省略.........

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]

#.........这里部分代码省略.........
    def fail_start(self):
        raise Exception("this wrapper has already been started")

    def abort_test(self, action):
        p = self.process
        if p is None or p.poll():
            raise ConnectionClosedException("cannot %s: subprocess has terminated" % action)

    def make_protocol(self):
        #make a connection using the process stdin / stdout
        conn = TwoFileConnection(self.process.stdin, self.process.stdout, abort_test=self.abort_test, target=self.description, socktype=self.description, close_cb=self.subprocess_exit)
        conn.timeout = 0
        protocol = Protocol(self, conn, self.process_packet, get_packet_cb=self.get_packet)
        setup_fastencoder_nocompression(protocol)
        protocol.large_packets = self.large_packets
        return protocol


    def exec_subprocess(self):
        kwargs = exec_kwargs()
        env = self.get_env()
        log("exec_subprocess() command=%s, env=%s, kwargs=%s", self.command, env, kwargs)
        proc = subprocess.Popen(self.command, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=sys.stderr.fileno(), env=env, **kwargs)
        getChildReaper().add_process(proc, self.description, self.command, True, True, callback=self.subprocess_exit)
        return proc

    def get_env(self):
        env = exec_env()
        env["XPRA_LOG_PREFIX"] = "%s " % self.description
        return env

    def cleanup(self):
        self.stop()

    def stop(self):
        self.stop_process()
        self.stop_protocol()

    def stop_process(self):
        log("%s.stop_process() sending stop request to %s", self, self.description)
        proc = self.process
        if proc and proc.poll() is None:
            try:
                proc.terminate()
                self.process = None
            except Exception as e:
                log.warn("failed to stop the wrapped subprocess %s: %s", proc, e)

    def stop_protocol(self):
        p = self.protocol
        if p:
            self.protocol = None
            log("%s.stop_protocol() calling %s", self, p.close)
            try:
                p.close()
            except Exception as e:
                log.warn("failed to close the subprocess connection: %s", p, e)


    def connection_lost(self, *args):
        log("connection_lost%s", args)
        self.stop()

    def gibberish(self, *args):
        log.warn("%s stopping on gibberish:", self.description)
        log.warn(" %s", repr_ellipsized(args[1], limit=80))
        self.stop()


    def get_packet(self):
        try:
            item = self.send_queue.get(False)
        except:
            item = None
        return (item, None, None, self.send_queue.qsize()>0)

    def send(self, *packet_data):
        self.send_queue.put(packet_data)
        p = self.protocol
        if p:
            p.source_has_more()
        INJECT_FAULT(p)

    def process_packet(self, proto, packet):
        if DEBUG_WRAPPER:
            log("process_packet(%s, %s)", proto, [str(x)[:32] for x in packet])
        signal_name = bytestostr(packet[0])
        self._fire_callback(signal_name, packet[1:])
        INJECT_FAULT(proto)

    def _fire_callback(self, signal_name, extra_args=[]):
        callbacks = self.signal_callbacks.get(signal_name)
        log("firing callback for '%s': %s", signal_name, callbacks)
        if callbacks:
            for cb, args in callbacks:
                try:
                    all_args = list(args) + extra_args
                    self.idle_add(cb, self, *all_args)
                except Exception:
                    log.error("error processing callback %s for %s packet", cb, signal_name, exc_info=True)

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]

#.........这里部分代码省略.........
        #info = sample.get_info()
        size = buf.get_size()
        extract_dup = getattr(buf, "extract_dup", None)
        if extract_dup:
            data = extract_dup(0, size)
        else:
            #crappy gi bindings detected, using workaround:
            from xpra.sound.gst_hacks import map_gst_buffer
            with map_gst_buffer(buf) as a:
                data = bytes(a[:])
        return self.emit_buffer(data, {"timestamp"  : normv(buf.pts),
                                   "duration"   : normv(buf.duration),
                                   })


    def on_new_preroll0(self, appsink):
        buf = appsink.emit('pull-preroll')
        gstlog('new preroll0: %s bytes', len(buf))
        return self.emit_buffer0(buf)

    def on_new_buffer(self, bus):
        #pygst 0.10
        buf = self.sink.emit("pull-buffer")
        return self.emit_buffer0(buf)


    def caps_to_dict(self, caps):
        if not caps:
            return {}
        d = {}
        try:
            for cap in caps:
                name = cap.get_name()
                capd = {}
                for k in cap.keys():
                    v = cap[k]
                    if type(v) in (str, int):
                        capd[k] = cap[k]
                    elif k not in self.skipped_caps:
                        log("skipping %s cap key %s=%s of type %s", name, k, v, type(v))
                d[name] = capd
        except Exception as e:
            log.error("Error parsing '%s':", caps)
            log.error(" %s", e)
        return d

    def emit_buffer0(self, buf):
        """ convert pygst structure into something more generic for the wire """
        #none of the metadata is really needed at present, but it may be in the future:
        #metadata = {"caps"      : buf.get_caps().to_string(),
        #            "size"      : buf.size,
        #            "timestamp" : buf.timestamp,
        #            "duration"  : buf.duration,
        #            "offset"    : buf.offset,
        #            "offset_end": buf.offset_end}
        log("emit buffer: %s bytes, timestamp=%s", len(buf.data), buf.timestamp//MS_TO_NS)
        metadata = {
                   "timestamp" : normv(buf.timestamp),
                   "duration"  : normv(buf.duration)
                   }
        d = self.caps_to_dict(buf.get_caps())
        if not self.caps or self.caps!=d:
            self.caps = d
            self.info["caps"] = self.caps
            metadata["caps"] = self.caps
        return self.emit_buffer(buf.data, metadata)

    def emit_buffer(self, data, metadata={}):
        f = self.file
        if f and data:
            self.file.write(data)
            self.file.flush()
        if self.state=="stopped":
            #don't bother
            return 0
        if JITTER>0:
            #will actually emit the buffer after a random delay
            if self.jitter_queue.empty():
                #queue was empty, schedule a timer to flush it
                from random import randint
                jitter = randint(1, JITTER)
                self.timeout_add(jitter, self.flush_jitter_queue)
                log("emit_buffer: will flush jitter queue in %ims", jitter)
            self.jitter_queue.put((data, metadata))
            return 0
        log("emit_buffer data=%s, len=%i, metadata=%s", type(data), len(data), metadata)
        return self.do_emit_buffer(data, metadata)

    def flush_jitter_queue(self):
        while not self.jitter_queue.empty():
            d,m = self.jitter_queue.get(False)
            self.do_emit_buffer(d, m)

    def do_emit_buffer(self, data, metadata={}):
        self.inc_buffer_count()
        self.inc_byte_count(len(data))
        metadata["time"] = int(time.time()*1000)
        self.idle_emit("new-buffer", data, metadata)
        self.emit_info()
        return 0

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]

#.........这里部分代码省略.........


    def exec_subprocess(self):
        kwargs = self.exec_kwargs()
        log("exec_subprocess() command=%s, kwargs=%s", self.command, kwargs)
        proc = subprocess.Popen(self.command, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=sys.stderr.fileno(), env=self.get_env(), **kwargs)
        getChildReaper().add_process(proc, self.description, self.command, True, True, callback=self.subprocess_exit)
        return proc

    def get_env(self):
        env = os.environ.copy()
        env["XPRA_SKIP_UI"] = "1"
        env["XPRA_LOG_PREFIX"] = "%s " % self.description
        #let's make things more complicated than they should be:
        #on win32, the environment can end up containing unicode, and subprocess chokes on it
        for k,v in env.items():
            try:
                env[k] = bytestostr(v.encode("utf8"))
            except:
                env[k] = bytestostr(v)
        return env

    def exec_kwargs(self):
        if os.name=="posix":
            return {"close_fds" : True}
        elif sys.platform.startswith("win"):
            if not WIN32_SHOWWINDOW:
                startupinfo = subprocess.STARTUPINFO()
                startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
                return {"startupinfo" : startupinfo}
        return {}


    def cleanup(self):
        self.stop()

    def stop(self):
        self.stop_process()
        #call via idle_add to prevent deadlocks on win32!
        gobject.idle_add(self.stop_protocol)

    def stop_process(self):
        log("stop() sending stop request to %s", self.description)
        proc = self.process
        if proc and proc.poll() is None:
            try:
                proc.terminate()
                self.process = None
            except Exception as e:
                log.warn("failed to stop the wrapped subprocess %s: %s", proc, e)

    def stop_protocol(self):
        p = self.protocol
        if p:
            self.protocol = None
            log("%s.stop() calling %s", self, p.close)
            try:
                p.close()
            except Exception as e:
                log.warn("failed to close the subprocess connection: %s", p, e)


    def connection_lost(self, *args):
        log("connection_lost%s", args)
        self.stop()

    def gibberish(self, *args):
        log("gibberish%s", args)
        self.stop()


    def get_packet(self):
        try:
            item = self.send_queue.get(False)
        except:
            item = None
        return (item, None, None, self.send_queue.qsize()>0)

    def send(self, *packet_data):
        self.send_queue.put(packet_data)
        p = self.protocol
        if p:
            p.source_has_more()

    def process_packet(self, proto, packet):
        if DEBUG_WRAPPER:
            log("process_packet(%s, %s)", proto, [str(x)[:32] for x in packet])
        signal_name = bytestostr(packet[0])
        self._fire_callback(signal_name, packet[1:])

    def _fire_callback(self, signal_name, extra_args=[]):
        callbacks = self.signal_callbacks.get(signal_name)
        log("firing callback for %s: %s", signal_name, callbacks)
        if callbacks:
            for cb, args in callbacks:
                try:
                    all_args = list(args) + extra_args
                    gobject.idle_add(cb, self, *all_args)
                except Exception:
                    log.error("error processing callback %s for %s packet", cb, signal_name, exc_info=True)

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
class ProxyInstanceProcess(Process):

    def __init__(self, uid, gid, env_options, session_options, socket_dir,
                 video_encoder_modules, csc_modules,
                 client_conn, client_state, cipher, encryption_key, server_conn, caps, message_queue):
        Process.__init__(self, name=str(client_conn))
        self.uid = uid
        self.gid = gid
        self.env_options = env_options
        self.session_options = session_options
        self.socket_dir = socket_dir
        self.video_encoder_modules = video_encoder_modules
        self.csc_modules = csc_modules
        self.client_conn = client_conn
        self.client_state = client_state
        self.cipher = cipher
        self.encryption_key = encryption_key
        self.server_conn = server_conn
        self.caps = caps
        log("ProxyProcess%s", (uid, gid, env_options, session_options, socket_dir,
                               video_encoder_modules, csc_modules,
                               client_conn, repr_ellipsized(str(client_state)), cipher, encryption_key, server_conn,
                               "%s: %s.." % (type(caps), repr_ellipsized(str(caps))), message_queue))
        self.client_protocol = None
        self.server_protocol = None
        self.exit = False
        self.main_queue = None
        self.message_queue = message_queue
        self.encode_queue = None            #holds draw packets to encode
        self.encode_thread = None
        self.video_encoding_defs = None
        self.video_encoders = None
        self.video_encoders_last_used_time = None
        self.video_encoder_types = None
        self.video_helper = None
        self.lost_windows = None
        #for handling the local unix domain socket:
        self.control_socket_cleanup = None
        self.control_socket = None
        self.control_socket_thread = None
        self.control_socket_path = None
        self.potential_protocols = []
        self.max_connections = MAX_CONCURRENT_CONNECTIONS

    def server_message_queue(self):
        while True:
            log("waiting for server message on %s", self.message_queue)
            m = self.message_queue.get()
            log("received proxy server message: %s", m)
            if m=="stop":
                self.stop("proxy server request")
                return
            elif m=="socket-handover-complete":
                log("setting sockets to blocking mode: %s", (self.client_conn, self.server_conn))
                #set sockets to blocking mode:
                set_blocking(self.client_conn)
                set_blocking(self.server_conn)
            else:
                log.error("unexpected proxy server message: %s", m)

    def signal_quit(self, signum, frame):
        log.info("")
        log.info("proxy process pid %s got signal %s, exiting", os.getpid(), SIGNAMES.get(signum, signum))
        self.exit = True
        signal.signal(signal.SIGINT, deadly_signal)
        signal.signal(signal.SIGTERM, deadly_signal)
        self.stop(SIGNAMES.get(signum, signum))

    def idle_add(self, fn, *args, **kwargs):
        #we emulate gobject's idle_add using a simple queue
        self.main_queue.put((fn, args, kwargs))

    def timeout_add(self, timeout, fn, *args, **kwargs):
        #emulate gobject's timeout_add using idle add and a Timer
        #using custom functions to cancel() the timer when needed
        def idle_exec():
            v = fn(*args, **kwargs)
            if bool(v):
                self.timeout_add(timeout, fn, *args, **kwargs)
            return False
        def timer_exec():
            #just run via idle_add:
            self.idle_add(idle_exec)
        Timer(timeout/1000.0, timer_exec).start()

    def run(self):
        log("ProxyProcess.run() pid=%s, uid=%s, gid=%s", os.getpid(), getuid(), getgid())
        setuidgid(self.uid, self.gid)
        if self.env_options:
            #TODO: whitelist env update?
            os.environ.update(self.env_options)
        self.video_init()

        log.info("new proxy instance started")
        log.info(" for client %s", self.client_conn)
        log.info(" and server %s", self.server_conn)

        signal.signal(signal.SIGTERM, self.signal_quit)
        signal.signal(signal.SIGINT, self.signal_quit)
        log("registered signal handler %s", self.signal_quit)
#.........这里部分代码省略.........

# 需要导入模块: from xpra.os_util import Queue [as 别名]
# 或者: from xpra.os_util.Queue import put [as 别名]
class Protocol(object):
    CONNECTION_LOST = "connection-lost"
    GIBBERISH = "gibberish"
    INVALID = "invalid"

    def __init__(self, scheduler, conn, process_packet_cb, get_packet_cb=None):
        """
            You must call this constructor and source_has_more() from the main thread.
        """
        assert scheduler is not None
        assert conn is not None
        self.timeout_add = scheduler.timeout_add
        self.idle_add = scheduler.idle_add
        self._conn = conn
        if FAKE_JITTER > 0:
            from xpra.net.fake_jitter import FakeJitter

            fj = FakeJitter(self.timeout_add, process_packet_cb)
            self._process_packet_cb = fj.process_packet_cb
        else:
            self._process_packet_cb = process_packet_cb
        self._write_queue = Queue(1)
        self._read_queue = Queue(20)
        self._read_queue_put = self._read_queue.put
        # Invariant: if .source is None, then _source_has_more == False
        self._get_packet_cb = get_packet_cb
        # counters:
        self.input_stats = {}
        self.input_packetcount = 0
        self.input_raw_packetcount = 0
        self.output_stats = {}
        self.output_packetcount = 0
        self.output_raw_packetcount = 0
        # initial value which may get increased by client/server after handshake:
        self.max_packet_size = 256 * 1024
        self.abs_max_packet_size = 256 * 1024 * 1024
        self.large_packets = ["hello"]
        self.send_aliases = {}
        self.receive_aliases = {}
        self._log_stats = None  # None here means auto-detect
        self._closed = False
        self.encoder = "none"
        self._encoder = self.noencode
        self.compressor = "none"
        self._compress = compression.nocompress
        self.compression_level = 0
        self.cipher_in = None
        self.cipher_in_name = None
        self.cipher_in_block_size = 0
        self.cipher_out = None
        self.cipher_out_name = None
        self.cipher_out_block_size = 0
        self._write_lock = Lock()
        from xpra.daemon_thread import make_daemon_thread

        self._write_thread = make_daemon_thread(self._write_thread_loop, "write")
        self._read_thread = make_daemon_thread(self._read_thread_loop, "read")
        self._read_parser_thread = make_daemon_thread(self._read_parse_thread_loop, "parse")
        self._write_format_thread = make_daemon_thread(self._write_format_thread_loop, "format")
        self._source_has_more = threading.Event()

    STATE_FIELDS = (
        "max_packet_size",
        "large_packets",
        "send_aliases",
        "receive_aliases",
        "cipher_in",
        "cipher_in_name",
        "cipher_in_block_size",
        "cipher_out",
        "cipher_out_name",
        "cipher_out_block_size",
        "compression_level",
        "encoder",
        "compressor",
    )

    def save_state(self):
        state = {}
        for x in Protocol.STATE_FIELDS:
            state[x] = getattr(self, x)
        return state

    def restore_state(self, state):
        assert state is not None
        for x in Protocol.STATE_FIELDS:
            assert x in state, "field %s is missing" % x
            setattr(self, x, state[x])
        # special handling for compressor / encoder which are named objects:
        self.enable_compressor(self.compressor)
        self.enable_encoder(self.encoder)

    def wait_for_io_threads_exit(self, timeout=None):
        for t in (self._read_thread, self._write_thread):
            t.join(timeout)
        exited = True
        for t in (self._read_thread, self._write_thread):
            if t.isAlive():
                log.warn("%s thread of %s has not yet exited (timeout=%s)", t.name, self._conn, timeout)
                exited = False
#.........这里部分代码省略.........