--- /dev/null
+# The MIT License (MIT)
+#
+# Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
+#
+# 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
+import bt2.connection
+import bt2.component
+import functools
+import bt2.port
+import bt2
+
+
+class GraphListenerType:
+ PORT_ADDED = 0
+ PORT_REMOVED = 1
+ PORTS_CONNECTED = 2
+ PORTS_DISCONNECTED = 3
+
+
+def _graph_port_added_listener_from_native(user_listener, port_ptr):
+ try:
+ port = bt2.port._create_from_ptr(port_ptr)
+ port._get()
+ user_listener(port)
+ except:
+ pass
+
+
+def _graph_port_removed_listener_from_native(user_listener, port_ptr):
+ try:
+ port = bt2.port._create_from_ptr(port_ptr)
+ port._get()
+ user_listener(port)
+ except:
+ pass
+
+
+def _graph_ports_connected_listener_from_native(user_listener,
+ upstream_port_ptr,
+ downstream_port_ptr):
+ try:
+ upstream_port = bt2.port._create_from_ptr(upstream_port_ptr)
+ upstream_port._get()
+ downstream_port = bt2.port._create_from_ptr(downstream_port_ptr)
+ downstream_port._get()
+ user_listener(upstream_port, downstream_port)
+ except:
+ pass
+
+
+def _graph_ports_disconnected_listener_from_native(user_listener,
+ upstream_comp_ptr,
+ downstream_comp_ptr,
+ upstream_port_ptr,
+ downstream_port_ptr):
+ try:
+ upstream_comp = bt2.component._create_generic_component_from_ptr(upstream_comp_ptr)
+ upstream_comp._get()
+ downstream_comp = bt2.component._create_generic_component_from_ptr(downstream_comp_ptr)
+ downstream_comp._get()
+ upstream_port = bt2.port._create_from_ptr(upstream_port_ptr)
+ upstream_port._get()
+ downstream_port = bt2.port._create_from_ptr(downstream_port_ptr)
+ downstream_port._get()
+ user_listener(upstream_comp, downstream_comp, upstream_port,
+ downstream_port)
+ except:
+ pass
+
+
+class Graph(object._Object):
+ def __init__(self):
+ ptr = native_bt.graph_create()
+
+ if ptr is None:
+ raise bt2.CreationError('cannot create graph object')
+
+ super().__init__(ptr)
+
+ def _handle_status(self, status, gen_error_msg):
+ if status == native_bt.GRAPH_STATUS_COMPONENT_REFUSES_PORT_CONNECTION:
+ raise bt2.PortConnectionRefused
+ elif status == native_bt.GRAPH_STATUS_CANCELED:
+ raise bt2.GraphCanceled
+ elif status == native_bt.GRAPH_STATUS_END:
+ raise bt2.Stop
+ elif status == native_bt.GRAPH_STATUS_AGAIN:
+ raise bt2.TryAgain
+ elif status == native_bt.GRAPH_STATUS_NO_SINK:
+ raise bt2.NoSinkComponent
+ elif status < 0:
+ raise bt2.Error(gen_error_msg)
+
+ def add_component(self, component_class, name, params=None):
+ if isinstance(component_class, bt2.component._GenericComponentClass):
+ cc_ptr = component_class._ptr
+ elif issubclass(component_class, bt2.component._UserComponent):
+ cc_ptr = component_class._cc_ptr
+ else:
+ raise TypeError("'{}' is not a component class".format(component_class.__class__.__name__))
+
+ utils._check_str(name)
+ params = bt2.create_value(params)
+
+ if params is None:
+ params_ptr = None
+ else:
+ params_ptr = params._ptr
+
+ status, comp_ptr = native_bt.graph_add_component(self._ptr, cc_ptr,
+ name, params_ptr)
+ self._handle_status(status, 'cannot add component to graph')
+ assert(comp_ptr)
+ return bt2.component._create_generic_component_from_ptr(comp_ptr)
+
+ def connect_ports(self, upstream_port, downstream_port):
+ utils._check_type(upstream_port, bt2.port._OutputPort)
+ utils._check_type(downstream_port, bt2.port._InputPort)
+ status, conn_ptr = native_bt.graph_connect_ports(self._ptr,
+ upstream_port._ptr,
+ downstream_port._ptr)
+ self._handle_status(status, 'cannot connect component ports within graph')
+ assert(conn_ptr)
+ return bt2.connection._Connection._create_from_ptr(conn_ptr)
+
+ def add_listener(self, listener_type, listener):
+ if not hasattr(listener, '__call__'):
+ raise TypeError("'listener' parameter is not callable")
+
+ if listener_type == GraphListenerType.PORT_ADDED:
+ fn = native_bt.py3_graph_add_port_added_listener
+ listener_from_native = functools.partial(_graph_port_added_listener_from_native,
+ listener)
+ elif listener_type == GraphListenerType.PORT_REMOVED:
+ fn = native_bt.py3_graph_add_port_removed_listener
+ listener_from_native = functools.partial(_graph_port_removed_listener_from_native,
+ listener)
+ elif listener_type == GraphListenerType.PORTS_CONNECTED:
+ fn = native_bt.py3_graph_add_ports_connected_listener
+ listener_from_native = functools.partial(_graph_ports_connected_listener_from_native,
+ listener)
+ elif listener_type == GraphListenerType.PORTS_DISCONNECTED:
+ fn = native_bt.py3_graph_add_ports_disconnected_listener
+ listener_from_native = functools.partial(_graph_ports_disconnected_listener_from_native,
+ listener)
+ else:
+ raise TypeError
+
+ listener_id = fn(self._ptr, listener_from_native)
+ utils._handle_ret(listener_id, 'cannot add listener to graph object')
+ return bt2._ListenerHandle(listener_id, self)
+
+ def run(self):
+ status = native_bt.graph_run(self._ptr)
+
+ if status == native_bt.GRAPH_STATUS_END:
+ return
+
+ self._handle_status(status, 'graph object stopped running because of an unexpected error')
+
+ def cancel(self):
+ status = native_bt.graph_cancel(self._ptr)
+ self._handle_status(status, 'cannot cancel graph object')
+
+ @property
+ def is_canceled(self):
+ is_canceled = native_bt.graph_is_canceled(self._ptr)
+ assert(is_canceled >= 0)
+ return is_canceled > 0
+
+ def __eq__(self, other):
+ if type(other) is not type(self):
+ return False
+
+ return self.addr == other.addr
projects / babeltrace.git / blobdiff