X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=src%2Fbindings%2Fpython%2Fbt2%2Fbt2%2Fmessage_iterator.py;h=e2efa732baba9729f2635456341d11121717b009;hb=f5567ea88d172767b34373bc6e402da8bfd85ef8;hp=51410189835ea5715e1b556a6b3efcbcf0b478b6;hpb=b6909b7320a98a17cba86fb88ac1370f4aa6edb8;p=babeltrace.git diff --git a/src/bindings/python/bt2/bt2/message_iterator.py b/src/bindings/python/bt2/bt2/message_iterator.py index 51410189..e2efa732 100644 --- a/src/bindings/python/bt2/bt2/message_iterator.py +++ b/src/bindings/python/bt2/bt2/message_iterator.py @@ -1,24 +1,6 @@ -# The MIT License (MIT) +# SPDX-License-Identifier: MIT # # Copyright (c) 2017 Philippe Proulx -# -# Permission is hereby granted, free of charge, to any person obtaining a copy -# of this software and associated documentation files (the "Software"), to deal -# in the Software without restriction, including without limitation the rights -# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -# copies of the Software, and to permit persons to whom the Software is -# furnished to do so, subject to the following conditions: -# -# The above copyright notice and this permission notice shall be included in -# all copies or substantial portions of the Software. -# -# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -# THE SOFTWARE. from bt2 import native_bt, object, utils from bt2 import message as bt2_message @@ -36,7 +18,10 @@ class _MessageIterator(collections.abc.Iterator): raise NotImplementedError -class _GenericMessageIterator(object._SharedObject, _MessageIterator): +class _UserComponentInputPortMessageIterator(object._SharedObject, _MessageIterator): + _get_ref = staticmethod(native_bt.message_iterator_get_ref) + _put_ref = staticmethod(native_bt.message_iterator_put_ref) + def __init__(self, ptr): self._current_msgs = [] self._at = 0 @@ -44,9 +29,11 @@ class _GenericMessageIterator(object._SharedObject, _MessageIterator): 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' + status, "unexpected error: cannot advance the message iterator" ) self._current_msgs = msgs self._at = 0 @@ -56,9 +43,12 @@ class _GenericMessageIterator(object._SharedObject, _MessageIterator): return bt2_message._create_from_ptr(msg_ptr) - @property def can_seek_beginning(self): - res = self._can_seek_beginning(self._ptr) + (status, res) = native_bt.message_iterator_can_seek_beginning(self._ptr) + utils._handle_func_status( + status, + "cannot check whether or not message iterator can seek its beginning", + ) return res != 0 def seek_beginning(self): @@ -66,31 +56,55 @@ class _GenericMessageIterator(object._SharedObject, _MessageIterator): self._current_msgs.clear() self._at = 0 - status = self._seek_beginning(self._ptr) - utils._handle_func_status(status, 'cannot seek message iterator beginning') + status = native_bt.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.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 + + 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.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.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 + ) -# 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 - ) + can_seek_forward = property(fset=can_seek_forward) # This is extended by the user to implement component classes in Python. It # is created for a given output port when an input port message iterator is -# created on the input port on the other side of the connection. It is also -# created when an output port message iterator is created on this output port. +# created on the input port on the other side of the connection. # # Its purpose is to feed the messages that should go out through this output # port. @@ -110,19 +124,28 @@ class _UserMessageIterator(_MessageIterator): 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 def _component(self): return native_bt.bt2_get_user_component_from_user_msg_iter(self._bt_ptr) + @property + def _port(self): + port_ptr = native_bt.self_message_iterator_borrow_port(self._bt_ptr) + assert port_ptr is not None + return bt2_port._create_self_from_ptr_and_get_ref( + port_ptr, native_bt.PORT_TYPE_OUTPUT + ) + @property def addr(self): return int(self._bt_ptr) @@ -146,7 +169,7 @@ class _UserMessageIterator(_MessageIterator): except Exception: raise - utils._check_type(msg, bt2_message._Message) + utils._check_type(msg, bt2_message._MessageConst) # The reference we return will be given to the message array. # However, the `msg` Python object may stay alive, if the user has kept @@ -154,31 +177,56 @@ class _UserMessageIterator(_MessageIterator): 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 `_seek_beginning` + # - 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 + if hasattr(self, "_user_can_seek_beginning"): + can_seek_beginning = self._user_can_seek_beginning() utils._check_bool(can_seek_beginning) return can_seek_beginning else: - return hasattr(self, '_user_seek_beginning') + return hasattr(self, "_user_seek_beginning") def _bt_seek_beginning_from_native(self): self._user_seek_beginning() - def _create_input_port_message_iterator(self, input_port): + 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_message_iterator(self, input_port): utils._check_type(input_port, bt2_port._UserComponentInputPort) - status, msg_iter_ptr = native_bt.bt2_self_component_port_input_message_iterator_create_from_message_iterator( + if not input_port.is_connected: + raise ValueError("input port is not connected") + + ( + status, + msg_iter_ptr, + ) = native_bt.bt2_message_iterator_create_from_message_iterator( self._bt_ptr, input_port._ptr ) - utils._handle_func_status(status, 'cannot create message iterator object') + utils._handle_func_status(status, "cannot create message iterator object") assert msg_iter_ptr is not None return _UserComponentInputPortMessageIterator(msg_iter_ptr) @@ -194,7 +242,7 @@ class _UserMessageIterator(_MessageIterator): if default_clock_snapshot is not None: if event_class.stream_class.default_clock_class is None: raise ValueError( - 'event messages in this stream must not have a default clock snapshot' + "event messages in this stream must not have a default clock snapshot" ) utils._check_uint64(default_clock_snapshot) @@ -210,7 +258,7 @@ class _UserMessageIterator(_MessageIterator): else: if event_class.stream_class.default_clock_class is not None: raise ValueError( - 'event messages in this stream must have a default clock snapshot' + "event messages in this stream must have a default clock snapshot" ) if event_class.stream_class.supports_packets: @@ -223,7 +271,7 @@ class _UserMessageIterator(_MessageIterator): ) if ptr is None: - raise bt2._MemoryError('cannot create event message object') + raise bt2._MemoryError("cannot create event message object") return bt2_message._EventMessage(ptr) @@ -234,7 +282,7 @@ class _UserMessageIterator(_MessageIterator): ) if ptr is None: - raise bt2._MemoryError('cannot create inactivity message object') + raise bt2._MemoryError("cannot create inactivity message object") return bt2_message._MessageIteratorInactivityMessage(ptr) @@ -243,7 +291,7 @@ class _UserMessageIterator(_MessageIterator): ptr = native_bt.message_stream_beginning_create(self._bt_ptr, stream._ptr) if ptr is None: - raise bt2._MemoryError('cannot create stream beginning message object') + raise bt2._MemoryError("cannot create stream beginning message object") msg = bt2_message._StreamBeginningMessage(ptr) @@ -257,7 +305,7 @@ class _UserMessageIterator(_MessageIterator): ptr = native_bt.message_stream_end_create(self._bt_ptr, stream._ptr) if ptr is None: - raise bt2._MemoryError('cannot create stream end message object') + raise bt2._MemoryError("cannot create stream end message object") msg = bt2_message._StreamEndMessage(ptr) @@ -288,7 +336,7 @@ class _UserMessageIterator(_MessageIterator): ptr = native_bt.message_packet_beginning_create(self._bt_ptr, packet._ptr) if ptr is None: - raise bt2._MemoryError('cannot create packet beginning message object') + raise bt2._MemoryError("cannot create packet beginning message object") return bt2_message._PacketBeginningMessage(ptr) @@ -314,7 +362,7 @@ class _UserMessageIterator(_MessageIterator): ptr = native_bt.message_packet_end_create(self._bt_ptr, packet._ptr) if ptr is None: - raise bt2._MemoryError('cannot create packet end message object') + raise bt2._MemoryError("cannot create packet end message object") return bt2_message._PacketEndMessage(ptr) @@ -324,29 +372,39 @@ class _UserMessageIterator(_MessageIterator): utils._check_type(stream, bt2_stream._Stream) if not stream.cls.supports_discarded_events: - raise ValueError('stream class does not support discarded events') + raise ValueError("stream class does not support discarded events") if stream.cls.discarded_events_have_default_clock_snapshots: if beg_clock_snapshot is None or end_clock_snapshot is None: raise ValueError( - 'discarded events have default clock snapshots for this stream class' + "discarded events have default clock snapshots for this stream class" ) utils._check_uint64(beg_clock_snapshot) utils._check_uint64(end_clock_snapshot) - ptr = native_bt.message_discarded_events_create_with_default_clock_snapshots( - self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot + + if beg_clock_snapshot > end_clock_snapshot: + raise ValueError( + "beginning default clock snapshot value ({}) is greater than end default clock snapshot value ({})".format( + beg_clock_snapshot, end_clock_snapshot + ) + ) + + ptr = ( + native_bt.message_discarded_events_create_with_default_clock_snapshots( + self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot + ) ) else: if beg_clock_snapshot is not None or end_clock_snapshot is not None: raise ValueError( - 'discarded events have no default clock snapshots for this stream class' + "discarded events have no default clock snapshots for this stream class" ) ptr = native_bt.message_discarded_events_create(self._bt_ptr, stream._ptr) if ptr is None: - raise bt2._MemoryError('cannot discarded events message object') + raise bt2._MemoryError("cannot discarded events message object") msg = bt2_message._DiscardedEventsMessage(ptr) @@ -361,29 +419,39 @@ class _UserMessageIterator(_MessageIterator): utils._check_type(stream, bt2_stream._Stream) if not stream.cls.supports_discarded_packets: - raise ValueError('stream class does not support discarded packets') + raise ValueError("stream class does not support discarded packets") if stream.cls.discarded_packets_have_default_clock_snapshots: if beg_clock_snapshot is None or end_clock_snapshot is None: raise ValueError( - 'discarded packets have default clock snapshots for this stream class' + "discarded packets have default clock snapshots for this stream class" ) utils._check_uint64(beg_clock_snapshot) utils._check_uint64(end_clock_snapshot) - ptr = native_bt.message_discarded_packets_create_with_default_clock_snapshots( - self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot + + if beg_clock_snapshot > end_clock_snapshot: + raise ValueError( + "beginning default clock snapshot value ({}) is greater than end default clock snapshot value ({})".format( + beg_clock_snapshot, end_clock_snapshot + ) + ) + + ptr = ( + native_bt.message_discarded_packets_create_with_default_clock_snapshots( + self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot + ) ) else: if beg_clock_snapshot is not None or end_clock_snapshot is not None: raise ValueError( - 'discarded packets have no default clock snapshots for this stream class' + "discarded packets have no default clock snapshots for this stream class" ) ptr = native_bt.message_discarded_packets_create(self._bt_ptr, stream._ptr) if ptr is None: - raise bt2._MemoryError('cannot discarded packets message object') + raise bt2._MemoryError("cannot discarded packets message object") msg = bt2_message._DiscardedPacketsMessage(ptr)