bt2: Add remaining trace-ir `*Const` classes and adapt tests

[babeltrace.git] / src / bindings / python / bt2 / bt2 / packet.py

# The MIT License (MIT)
#
# Copyright (c) 2016-2017 Philippe Proulx <pproulx@efficios.com>
#
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# furnished to do so, subject to the following conditions:
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# THE SOFTWARE.

from bt2 import native_bt, object
from bt2 import field as bt2_field
from bt2 import stream as bt2_stream


class _PacketConst(object._SharedObject):
    _get_ref = staticmethod(native_bt.packet_get_ref)
    _put_ref = staticmethod(native_bt.packet_put_ref)
    _borrow_stream_ptr = staticmethod(native_bt.packet_borrow_stream_const)
    _borrow_context_field_ptr = staticmethod(
        native_bt.packet_borrow_context_field_const
    )
    _stream_pycls = property(lambda _: bt2_stream._StreamConst)
    _create_field_from_ptr = staticmethod(bt2_field._create_field_from_const_ptr)

    @property
    def stream(self):
        stream_ptr = self._borrow_stream_ptr(self._ptr)
        assert stream_ptr is not None
        return self._stream_pycls._create_from_ptr_and_get_ref(stream_ptr)

    @property
    def context_field(self):
        field_ptr = self._borrow_context_field_ptr(self._ptr)

        if field_ptr is None:
            return

        return self._create_field_from_ptr(
            field_ptr, self._ptr, self._get_ref, self._put_ref
        )


class _Packet(_PacketConst):
    _borrow_stream_ptr = staticmethod(native_bt.packet_borrow_stream)
    _borrow_context_field_ptr = staticmethod(native_bt.packet_borrow_context_field)
    _stream_pycls = property(lambda _: bt2_stream._Stream)
    _create_field_from_ptr = staticmethod(bt2_field._create_field_from_ptr)