#include <Synapses.h>

Inheritance diagram for Synapses:

Public Member Functions
virtual void	AddGroup (int presynaptic_group_id, int postsynaptic_group_id, Neurons neurons, Neurons input_neurons, float timestep, synapse_parameters_struct *synapse_params)
virtual void	allocate_device_pointers ()
virtual void	copy_constants_and_initial_efficacies_to_device ()
virtual void	set_threads_per_block_and_blocks_per_grid (int threads)
virtual void	increment_number_of_synapses (int increment)
virtual void	shuffle_synapses ()
Public Attributes
int	total_number_of_synapses
int	temp_number_of_synapses_in_last_group
int	largest_synapse_group_size
bool	print_synapse_group_details
int *	presynaptic_neuron_indices
int *	postsynaptic_neuron_indices
int *	original_synapse_indices
int *	synapse_postsynaptic_neuron_count_index
float *	synaptic_efficacies_or_weights
int *	d_presynaptic_neuron_indices
int *	d_postsynaptic_neuron_indices
int *	d_temp_presynaptic_neuron_indices
int *	d_temp_postsynaptic_neuron_indices
int *	d_synapse_postsynaptic_neuron_count_index
float *	d_synaptic_efficacies_or_weights
float *	d_temp_synaptic_efficacies_or_weights
dim3	number_of_synapse_blocks_per_grid
dim3	threads_per_block

Detailed Description

This is the parent class for SpikingSpiking. It provides a set of default methods which are primarily used to add groups of synapses to the connectivity.

Member Function Documentation

virtual void Synapses::AddGroup	(	int	presynaptic_group_id,
		int	postsynaptic_group_id,
		Neurons *	neurons,
		Neurons *	input_neurons,
		float	timestep,
		synapse_parameters_struct *	synapse_params
	)		`[virtual]`

Determines the synaptic connections to add to the simulation connectivity. This is a virtual function to allow polymorphism in the methods of various sub-class implementations. Allocates memory as necessary for group size and indices storage.

Parameters:

presynaptic_group_id	An int ID of the presynaptic neuron population (ID is < 0 if presynaptic population is an InputSpikingNeuron population)
postsynaptic_group_id	An int ID of the postsynaptic neuron population.
neurons	A pointer to an instance of the Neurons class (or sub-class) which is included in this simulation.
input_neurons	A pointer to an instance of the Neurons class (or sub-class) which is included in this simulation (for population indices < 0, i.e. InputSpikingNeurons).
timestep	A float indicating the timestep at which the simulator is running.
synapse_params	A synapse_parameters_struct pointer describing the connectivity arrangement to be added between the pre and postsynaptic neuron populations.

Reimplemented in SpikingSynapses, ConductanceSpikingSynapses, and CurrentSpikingSynapses.

virtual void Synapses::allocate_device_pointers ( ) [virtual]

Exclusively for the allocation of device memory. This class allocates device pointers for presynaptic and postsynaptic neuron ids, synaptic efficacies/weights, and the number of synaptic connections to the postsynaptic neuron.

Reimplemented in SpikingSynapses, and ConductanceSpikingSynapses.

virtual void Synapses::copy_constants_and_initial_efficacies_to_device ( ) [virtual]

Allows copying of static data related to neuron dynamics to the device. Copies synapse pre/post ids, efficies/weights, and number of postsynaptic contacts on postsynaptic neuron.

Reimplemented in SpikingSynapses, and ConductanceSpikingSynapses.

virtual void Synapses::increment_number_of_synapses ( int increment ) [virtual]

A function called in to reallocate memory for a given number more synapses. /param increment The number of synapses for which allocated memory must be expanded.

Reimplemented in SpikingSynapses, and ConductanceSpikingSynapses.

virtual void Synapses::set_threads_per_block_and_blocks_per_grid ( int threads ) [virtual]

A local, function called in to determine the CUDA Device thread (Synapses::threads_per_block) and block dimensions (Synapses::number_of_synapse_blocks_per_grid).

Reimplemented in SpikingSynapses, and ConductanceSpikingSynapses.

virtual void Synapses::shuffle_synapses ( ) [virtual]

A function to shuffle the order of synapse array storage for increased GPU memory write speeds. Currently Unused.

Reimplemented in SpikingSynapses, and ConductanceSpikingSynapses.