feat: speed up to processing bluez passive data (#221)

src/dbus_fast/message.pxd

@@ -27,6 +27,8 @@ cdef object LITTLE_ENDIAN
 cdef object PROTOCOL_VERSION
 
 cdef object MESSAGE_FLAG
+cdef object MESSAGE_FLAG_NONE
+cdef object MESSAGE_TYPE_METHOD_CALL
 
 cdef get_signature_tree
 

src/dbus_fast/message.py

@@ -30,6 +30,9 @@
 
 MESSAGE_FLAG = MessageFlag
 
+MESSAGE_FLAG_NONE = MessageFlag.NONE
+MESSAGE_TYPE_METHOD_CALL = MessageType.METHOD_CALL
+
 
 class Message:
     """A class for sending and receiving messages through the
@@ -101,8 +104,8 @@ def __init__(
         path: Optional[str] = None,
         interface: Optional[str] = None,
         member: Optional[str] = None,
-        message_type: MessageType = MessageType.METHOD_CALL,
-        flags: Union[MessageFlag, int] = MessageFlag.NONE,
+        message_type: MessageType = MESSAGE_TYPE_METHOD_CALL,
+        flags: Union[MessageFlag, int] = MESSAGE_FLAG_NONE,
         error_name: Optional[Union[str, ErrorType]] = None,
         reply_serial: int = 0,
         sender: Optional[str] = None,
@@ -153,6 +156,22 @@ def __init__(
             if not getattr(self, field):
                 raise InvalidMessageError(f"missing required field: {field}")
 
+    def __repr__(self) -> str:
+        """Return a string representation of this message."""
+        return (
+            f"<Message {self.message_type.name} "
+            f"serial={self.serial} "
+            f"reply_serial={self.reply_serial} "
+            f"sender={self.sender} "
+            f"destination={self.destination} "
+            f"path={self.path} "
+            f"interface={self.interface} "
+            f"member={self.member} "
+            f"error_name={self.error_name} "
+            f"signature={self.signature} "
+            f"body={self.body}>"
+        )
+
     @staticmethod
     def new_error(
         msg: "Message", error_name: Union[str, ErrorType], error_text: str

src/dbus_fast/message_bus.pxd

@@ -10,12 +10,14 @@ cdef object MessageFlag
 
 cdef object MESSAGE_TYPE_CALL
 cdef object MESSAGE_TYPE_SIGNAL
-cdef object NO_REPLY_EXPECTED_VALUE
+cdef object NO_REPLY_EXPECTED
+cdef object BLOCK_UNEXPECTED_REPLY
 cdef object assert_object_path_valid
 cdef object assert_bus_name_valid
 
 cdef _expects_reply(Message msg)
 
+
 cdef class SendReply:
 
     cdef object _bus
@@ -28,12 +30,12 @@ cdef class BaseMessageBus:
     cdef public object _user_disconnect
     cdef public object _method_return_handlers
     cdef public object _serial
-    cdef public object _path_exports
+    cdef public cython.dict _path_exports
     cdef public cython.list _user_message_handlers
-    cdef public object _name_owners
+    cdef public cython.dict _name_owners
     cdef public object _bus_address
     cdef public object _name_owner_match_rule
-    cdef public object _match_rules
+    cdef public cython.dict _match_rules
     cdef public object _high_level_client_initialized
     cdef public object _ProxyObject
     cdef public object _machine_id
@@ -45,7 +47,9 @@ cdef class BaseMessageBus:
     cpdef _process_message(self, Message msg)
 
     @cython.locals(
+        methods=cython.list,
         method=_Method,
-        interface=ServiceInterface
+        interface=ServiceInterface,
+        interfaces=cython.list,
     )
     cdef _find_message_handler(self, Message msg)

src/dbus_fast/message_bus.py

@@ -27,13 +27,34 @@
 
 MESSAGE_TYPE_CALL = MessageType.METHOD_CALL
 MESSAGE_TYPE_SIGNAL = MessageType.SIGNAL
-NO_REPLY_EXPECTED_VALUE = MessageFlag.NO_REPLY_EXPECTED.value
+NO_REPLY_EXPECTED = MessageFlag.NO_REPLY_EXPECTED
+_LOGGER = logging.getLogger(__name__)
+
 
 _Message = Message
 
 
 def _expects_reply(msg: _Message) -> bool:
-    return not (msg.flags.value & NO_REPLY_EXPECTED_VALUE)
+    """Whether a message expects a reply."""
+    return not (msg.flags & NO_REPLY_EXPECTED)
+
+
+def _block_unexpected_reply(reply: _Message) -> None:
+    """Block a reply if it's not expected.
+
+    Previously we silently ignored replies that were not expected, but this
+    lead to implementation errors that were hard to debug. Now we log a
+    debug message instead.
+    """
+    _LOGGER.debug(
+        "Blocked attempt to send a reply from handler "
+        "that received a message with flag "
+        "MessageFlag.NO_REPLY_EXPECTED: %s",
+        reply,
+    )
+
+
+BLOCK_UNEXPECTED_REPLY = _block_unexpected_reply
 
 
 class SendReply:
@@ -50,8 +71,7 @@ def __enter__(self):
         return self
 
     def __call__(self, reply: Message) -> None:
-        if _expects_reply(self._msg):
-            self._bus.send(reply)
+        self._bus.send(reply)
 
     def _exit(
         self,
@@ -855,9 +875,19 @@ def _process_message(self, msg: _Message) -> None:
         if msg.message_type is MESSAGE_TYPE_CALL:
             if not handled:
                 handler = self._find_message_handler(msg)
+                if not _expects_reply(msg):
+                    if handler:
+                        handler(msg, BLOCK_UNEXPECTED_REPLY)
+                    else:
+                        _LOGGER.error(
+                            '"%s.%s" with signature "%s" could not be found',
+                            msg.interface,
+                            msg.member,
+                            msg.signature,
+                        )
+                    return
 
                 send_reply = SendReply(self, msg)
-
                 with send_reply:
                     if handler:
                         handler(msg, send_reply)
@@ -892,8 +922,11 @@ def _make_method_handler(
         def _callback_method_handler(
             msg: Message, send_reply: Callable[[Message], None]
         ) -> None:
+            result = method_fn(interface, *msg_body_to_args(msg))
+            if not _expects_reply(msg):
+                return
             body, fds = fn_result_to_body(
-                method_fn(interface, *msg_body_to_args(msg)),
+                result,
                 signature_tree=out_signature_tree,
                 replace_fds=negotiate_unix_fd,
             )
@@ -911,8 +944,8 @@ def _callback_method_handler(
         return _callback_method_handler
 
     def _find_message_handler(
-        self, msg
-    ) -> Optional[Callable[[Message, Callable], None]]:
+        self, msg: _Message
+    ) -> Optional[Callable[[Message, Callable[[Message], None]], None]]:
         if (
             msg.interface == "org.freedesktop.DBus.Introspectable"
             and msg.member == "Introspect"
@@ -937,8 +970,12 @@ def _find_message_handler(
 
         msg_path = msg.path
         if msg_path:
-            for interface in self._path_exports.get(msg_path, []):
-                for method in ServiceInterface._get_methods(interface):
+            interfaces = self._path_exports.get(msg_path)
+            if not interfaces:
+                return None
+            for interface in interfaces:
+                methods = ServiceInterface._get_methods(interface)
+                for method in methods:
                     if method.disabled:
                         continue
 

src/dbus_fast/service.pxd

@@ -2,17 +2,19 @@
 
 import cython
 
+from .signature cimport SignatureTree
+
 
 cdef class _Method:
 
-    cdef public object name
+    cdef public str name
     cdef public object fn
     cdef public object disabled
     cdef public object introspection
-    cdef public object in_signature
-    cdef public object out_signature
-    cdef public object in_signature_tree
-    cdef public object out_signature_tree
+    cdef public str in_signature
+    cdef public str out_signature
+    cdef public SignatureTree in_signature_tree
+    cdef public SignatureTree out_signature_tree
 
 cdef class ServiceInterface:
 

src/dbus_fast/service.py

@@ -36,7 +36,7 @@
 
 
 class _Method:
-    def __init__(self, fn, name, disabled=False):
+    def __init__(self, fn, name: str, disabled=False):
         in_signature = ""
         out_signature = ""
 

tests/test_marshaller.py

@@ -602,5 +602,6 @@ def test_unmarshall_bluez_passive_message():
     unmarshaller = Unmarshaller(stream)
     unmarshaller.unmarshall()
     message = unmarshaller.message
+    assert "/org/bluez/hci0/dev_58_D3_49_E6_02_6E" in str(message)
     unpacked = unpack_variants(message.body)
     assert unpacked == ["/org/bluez/hci0/dev_58_D3_49_E6_02_6E"]