Source code for spynnaker.pyNN.models.neural_projections.projection_application_edge

# Copyright (c) 2017-2019 The University of Manchester
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <>.

from spinn_utilities.overrides import overrides
from pacman.model.graphs.application import ApplicationEdge
from pacman.model.partitioner_interfaces import AbstractSlicesConnect
from spinn_front_end_common.interface.provenance import (

_DynamicsStructural = None

def _are_dynamics_structural(synapse_dynamics):
    global _DynamicsStructural
    if _DynamicsStructural is None:
        # Avoid import loop by postponing this import
        from spynnaker.pyNN.models.neuron.synapse_dynamics import (
        _DynamicsStructural = AbstractSynapseDynamicsStructural
    return isinstance(synapse_dynamics, _DynamicsStructural)

[docs]class ProjectionApplicationEdge( ApplicationEdge, AbstractSlicesConnect, AbstractProvidesLocalProvenanceData): """ An edge which terminates on an :py:class:`AbstractPopulationVertex`. """ __slots__ = [ "__delay_edge", "__synapse_information", # Slices of the pre_vertexes of the machine_edges "__pre_slices", # Slices of the post_vertexes of the machine_edges "__post_slices", # True if slices have been convered to sorted lists "__slices_list_mode", "__machine_edges_by_slices" ] def __init__( self, pre_vertex, post_vertex, synapse_information, label=None): """ :param AbstractPopulationVertex pre_vertex: :param AbstractPopulationVertex post_vertex: :param synapse_information: The synapse information on this edge :type synapse_information: SynapseInformation or iterable(SynapseInformation) :param str label: """ super().__init__(pre_vertex, post_vertex, label=label) # A list of all synapse information for all the projections that are # represented by this edge if hasattr(synapse_information, '__iter__'): self.__synapse_information = synapse_information else: self.__synapse_information = [synapse_information] # The edge from the delay extension of the pre_vertex to the # post_vertex - this might be None if no long delays are present self.__delay_edge = None # Keep the machine edges by pre- and post-vertex self.__machine_edges_by_slices = dict() self.__pre_slices = set() self.__post_slices = set() self.__slices_list_mode = False
[docs] def add_synapse_information(self, synapse_information): """ :param SynapseInformation synapse_information: """ self.__synapse_information.append(synapse_information)
@property def synapse_information(self): """ :rtype: list(SynapseInformation) """ return self.__synapse_information @property def delay_edge(self): """ Settable. :rtype: DelayedApplicationEdge or None """ return self.__delay_edge @delay_edge.setter def delay_edge(self, delay_edge): self.__delay_edge = delay_edge @property def n_delay_stages(self): """ :rtype: int """ if self.__delay_edge is None: return 0 return self.__delay_edge.pre_vertex.n_delay_stages
[docs] def get_machine_edge(self, pre_vertex, post_vertex): """ Get a specific machine edge of this edge :param PopulationMachineVertex pre_vertex: The vertex at the start of the machine edge :param PopulationMachineVertex post_vertex: The vertex at the end of the machine edge :rtype: ~pacman.model.graphs.machine.MachineEdge or None """ return self.__machine_edges_by_slices.get( (pre_vertex.vertex_slice, post_vertex.vertex_slice), None)
[docs] @overrides(AbstractSlicesConnect.could_connect) def could_connect(self, pre_slice, post_slice): for synapse_info in self.__synapse_information: # Structual Plasticity can learn connection not originally included if _are_dynamics_structural(synapse_info.synapse_dynamics): return True if synapse_info.connector.could_connect( synapse_info, pre_slice, post_slice): return True return False
[docs] @overrides(ApplicationEdge.remember_associated_machine_edge) def remember_associated_machine_edge(self, machine_edge): super().remember_associated_machine_edge(machine_edge) if self.__slices_list_mode: # Unexpected but if extra remember after a get convert back to sets self.__pre_slices = set(self.__pre_slices) self.__post_slices = set(self.__post_slices) self.__slices_list_mode = False self.__pre_slices.add(machine_edge.pre_vertex.vertex_slice) self.__post_slices.add(machine_edge.post_vertex.vertex_slice) self.__machine_edges_by_slices[ machine_edge.pre_vertex.vertex_slice, machine_edge.post_vertex.vertex_slice] = machine_edge
[docs] @overrides(ApplicationEdge.forget_machine_edges) def forget_machine_edges(self): super().forget_machine_edges() self.__pre_slices = set() self.__post_slices = set() self.__slices_list_mode = False
def __check_list_mode(self): """ Makes sure the pre- and post-slices are sorted lists """ if not self.__slices_list_mode: self.__pre_slices = sorted( list(self.__pre_slices), key=lambda x: x.lo_atom) self.__post_slices = sorted( list(self.__post_slices), key=lambda x: x.lo_atom) self.__slices_list_mode = True @property def pre_slices(self): """ Get the slices for the pre_vertexes of the MachineEdges While the remember machine_edges remain unchanged this will return a list with a consistent id. If the edges change a new list is created The List will be sorted by lo_atom. No checking is done for overlaps or gaps :return: Ordered list of pre-slices :rtype: list(~pacman.model.graphs.common.Slice) """ self.__check_list_mode() return self.__pre_slices @property def post_slices(self): """ Get the slices for the post_vertexes of the MachineEdges While the remember machine_edges remain unchanged this will return a list with a consistent id. If the edges change a new list is created The List will be sorted by lo_atom. No checking is done for overlaps or gaps :return: Ordered list of post-slices :rtype: list(~pacman.model.graphs.common.Slice) """ self.__check_list_mode() return self.__post_slices
[docs] @overrides(AbstractProvidesLocalProvenanceData.get_local_provenance_data) def get_local_provenance_data(self): prov_items = list() for synapse_info in self.synapse_information: prov_items.extend( synapse_info.connector.get_provenance_data(synapse_info)) for machine_edge in self.machine_edges: prov_items.extend( synapse_info.synapse_dynamics.get_provenance_data( machine_edge.pre_vertex.label, machine_edge.post_vertex.label)) return prov_items