static_synapse.h

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/*
 *  static_synapse.h
 *
 *  This file is part of NEST.
 *
 *  Copyright (C) 2004 The NEST Initiative
 *
 *  NEST 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  NEST is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with NEST.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 
#ifndef STATICSYNAPSE_H
#define STATICSYNAPSE_H
 
// Includes from nestkernel:
#include "connection.h"
 
namespace nest
{
 
/* BeginUserDocs: synapse, chemical, static
 
Short description
+++++++++++++++++
 
Synapse type for static connections
 
Description
+++++++++++
 
``static_synapse`` does not support any kind of plasticity. It simply stores
the parameters target, weight, delay and receiver port for each connection.
 
Transmits
+++++++++
 
SpikeEvent, RateEvent, CurrentEvent, ConductanceEvent,
DoubleDataEvent, DataLoggingRequest
 
See also
++++++++
 
tsodyks_synapse, stdp_synapse
 
Examples using this model
+++++++++++++++++++++++++
 
.. listexamples:: static_synapse
 
EndUserDocs */
 
void register_static_synapse( const std::string& name );
 
template < typename targetidentifierT >
class static_synapse : public Connection< targetidentifierT >
{
  double weight_;
 
public:
  // this line determines which common properties to use
  typedef CommonSynapseProperties CommonPropertiesType;
  typedef Connection< targetidentifierT > ConnectionBase;
 
  static constexpr ConnectionModelProperties properties = ConnectionModelProperties::HAS_DELAY
    | ConnectionModelProperties::IS_PRIMARY | ConnectionModelProperties::SUPPORTS_HPC
    | ConnectionModelProperties::SUPPORTS_LBL;
 
  static_synapse()
    : ConnectionBase()
    , weight_( 1.0 )
  {
  }
 
  static_synapse( const static_synapse& rhs ) = default;
  static_synapse& operator=( const static_synapse& rhs ) = default;
 
  // Explicitly declare all methods inherited from the dependent base
  // ConnectionBase. This avoids explicit name prefixes in all places these
  // functions are used. Since ConnectionBase depends on the template parameter,
  // they are not automatically found in the base class.
  using ConnectionBase::get_delay_steps;
  using ConnectionBase::get_rport;
  using ConnectionBase::get_target;
 
 
  class ConnTestDummyNode : public ConnTestDummyNodeBase
  {
  public:
    // Ensure proper overriding of overloaded virtual functions.
    // Return values from functions are ignored.
    using ConnTestDummyNodeBase::handles_test_event;
    size_t
    handles_test_event( SpikeEvent&, size_t ) override
    {
      return invalid_port;
    }
    size_t
    handles_test_event( RateEvent&, size_t ) override
    {
      return invalid_port;
    }
    size_t
    handles_test_event( DataLoggingRequest&, size_t ) override
    {
      return invalid_port;
    }
    size_t
    handles_test_event( CurrentEvent&, size_t ) override
    {
      return invalid_port;
    }
    size_t
    handles_test_event( ConductanceEvent&, size_t ) override
    {
      return invalid_port;
    }
    size_t
    handles_test_event( DoubleDataEvent&, size_t ) override
    {
      return invalid_port;
    }
    size_t
    handles_test_event( DSSpikeEvent&, size_t ) override
    {
      return invalid_port;
    }
    size_t
    handles_test_event( DSCurrentEvent&, size_t ) override
    {
      return invalid_port;
    }
  };
 
  void
  check_connection( Node& s, Node& t, size_t receptor_type, const CommonPropertiesType& )
  {
    ConnTestDummyNode dummy_target;
    ConnectionBase::check_connection_( dummy_target, s, t, receptor_type );
  }
 
  bool
  send( Event& e, const size_t tid, const CommonSynapseProperties& )
  {
    e.set_weight( weight_ );
    e.set_delay_steps( get_delay_steps() );
    e.set_receiver( *get_target( tid ) );
    e.set_rport( get_rport() );
    e();
    return true;
  }
 
  void get_status( Dictionary& d ) const;
 
  void set_status( const Dictionary& d, ConnectorModel& cm );
 
  void
  set_weight( double w )
  {
    weight_ = w;
  }
};
 
template < typename targetidentifierT >
constexpr ConnectionModelProperties static_synapse< targetidentifierT >::properties;
 
template < typename targetidentifierT >
void
static_synapse< targetidentifierT >::get_status( Dictionary& d ) const
{
 
  ConnectionBase::get_status( d );
  d[ names::weight ] = weight_;
  d[ names::size_of ] = static_cast< long >( sizeof( *this ) );
}
 
template < typename targetidentifierT >
void
static_synapse< targetidentifierT >::set_status( const Dictionary& d, ConnectorModel& cm )
{
  ConnectionBase::set_status( d, cm );
  d.update_value( names::weight, weight_ );
}
 
}  // namespace
 
#endif /* #ifndef STATICSYNAPSE_H */