raise NotImplementedError
-class _GenericMessageIterator(object._SharedObject, _MessageIterator):
+class _UserComponentInputPortMessageIterator(object._SharedObject, _MessageIterator):
+ _get_ref = staticmethod(
+ native_bt.self_component_port_input_message_iterator_get_ref
+ )
+ _put_ref = staticmethod(
+ native_bt.self_component_port_input_message_iterator_put_ref
+ )
+
def __init__(self, ptr):
self._current_msgs = []
self._at = 0
def __next__(self):
if len(self._current_msgs) == self._at:
- status, msgs = self._get_msg_range(self._ptr)
+ status, msgs = native_bt.bt2_self_component_port_input_get_msg_range(
+ self._ptr
+ )
utils._handle_func_status(
status, 'unexpected error: cannot advance the message iterator'
)
return bt2_message._create_from_ptr(msg_ptr)
- @property
def can_seek_beginning(self):
- status, res = self._can_seek_beginning(self._ptr)
+ status, res = native_bt.self_component_port_input_message_iterator_can_seek_beginning(
+ self._ptr
+ )
utils._handle_func_status(
status,
'cannot check whether or not message iterator can seek its beginning',
self._current_msgs.clear()
self._at = 0
- status = self._seek_beginning(self._ptr)
+ status = native_bt.self_component_port_input_message_iterator_seek_beginning(
+ self._ptr
+ )
utils._handle_func_status(status, 'cannot seek message iterator beginning')
+ def can_seek_ns_from_origin(self, ns_from_origin):
+ utils._check_int64(ns_from_origin)
+ status, res = native_bt.self_component_port_input_message_iterator_can_seek_ns_from_origin(
+ self._ptr, ns_from_origin
+ )
+ utils._handle_func_status(
+ status,
+ 'cannot check whether or not message iterator can seek given ns from origin',
+ )
+ return res != 0
-# This is created when a component wants to iterate on one of its input ports.
-class _UserComponentInputPortMessageIterator(_GenericMessageIterator):
- _get_msg_range = staticmethod(native_bt.bt2_self_component_port_input_get_msg_range)
- _get_ref = staticmethod(
- native_bt.self_component_port_input_message_iterator_get_ref
- )
- _put_ref = staticmethod(
- native_bt.self_component_port_input_message_iterator_put_ref
- )
- _can_seek_beginning = staticmethod(
- native_bt.self_component_port_input_message_iterator_can_seek_beginning
- )
- _seek_beginning = staticmethod(
- native_bt.self_component_port_input_message_iterator_seek_beginning
- )
+ def seek_ns_from_origin(self, ns_from_origin):
+ utils._check_int64(ns_from_origin)
+
+ # Forget about buffered messages, they won't be valid after seeking.
+ self._current_msgs.clear()
+ self._at = 0
+
+ status = native_bt.self_component_port_input_message_iterator_seek_ns_from_origin(
+ self._ptr, ns_from_origin
+ )
+ utils._handle_func_status(
+ status, 'message iterator cannot seek given ns from origin'
+ )
+
+ @property
+ def can_seek_forward(self):
+ return native_bt.self_component_port_input_message_iterator_can_seek_forward(
+ self._ptr
+ )
+
+
+class _MessageIteratorConfiguration:
+ def __init__(self, ptr):
+ self._ptr = ptr
+
+ def can_seek_forward(self, value):
+ utils._check_bool(value)
+ native_bt.self_message_iterator_configuration_set_can_seek_forward(
+ self._ptr, value
+ )
+
+ can_seek_forward = property(fset=can_seek_forward)
# This is extended by the user to implement component classes in Python. It
self._bt_ptr = ptr
return self
- def _bt_init_from_native(self, self_output_port_ptr):
+ def _bt_init_from_native(self, config_ptr, self_output_port_ptr):
self_output_port = bt2_port._create_self_from_ptr_and_get_ref(
self_output_port_ptr, native_bt.PORT_TYPE_OUTPUT
)
- self.__init__(self_output_port)
+ config = _MessageIteratorConfiguration(config_ptr)
+ self.__init__(config, self_output_port)
- def __init__(self, output_port):
+ def __init__(self, config, self_output_port):
pass
@property
msg._get_ref(msg._ptr)
return int(msg._ptr)
- @property
def _bt_can_seek_beginning_from_native(self):
# Here, we mimic the behavior of the C API:
#
- # - If the iterator has a _user_can_seek_beginning attribute,
+ # - If the iterator has a _user_can_seek_beginning method,
# read it and use that result.
# - Otherwise, the presence or absence of a `_user_seek_beginning`
# method indicates whether the iterator can seek beginning.
if hasattr(self, '_user_can_seek_beginning'):
- can_seek_beginning = self._user_can_seek_beginning
+ can_seek_beginning = self._user_can_seek_beginning()
utils._check_bool(can_seek_beginning)
return can_seek_beginning
else:
def _bt_seek_beginning_from_native(self):
self._user_seek_beginning()
+ def _bt_can_seek_ns_from_origin_from_native(self, ns_from_origin):
+ # Return whether the iterator can seek ns from origin using the
+ # user-implemented seek_ns_from_origin method. We mimic the behavior
+ # of the C API:
+ #
+ # - If the iterator has a _user_can_seek_ns_from_origin method,
+ # call it and use its return value.
+ # - Otherwise, if there is a `_user_seek_ns_from_origin` method,
+ # we presume it's possible.
+
+ if hasattr(self, '_user_can_seek_ns_from_origin'):
+ can_seek_ns_from_origin = self._user_can_seek_ns_from_origin(ns_from_origin)
+ utils._check_bool(can_seek_ns_from_origin)
+ return can_seek_ns_from_origin
+ else:
+ return hasattr(self, '_user_seek_ns_from_origin')
+
+ def _bt_seek_ns_from_origin_from_native(self, ns_from_origin):
+ self._user_seek_ns_from_origin(ns_from_origin)
+
def _create_input_port_message_iterator(self, input_port):
utils._check_type(input_port, bt2_port._UserComponentInputPort)
projects / babeltrace.git / blobdiff