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| #include <vector>
#include <iostream>
class Neuron
{
};
class Receiver
{
public:
Neuron& n;
Receiver(Neuron &nm) : n(nm) { }
Neuron& getNeuron(void) {
return n;
}
void receive(void) {}
};
template<typename _Alloc = std::allocator<Receiver *>>
class Axon
{
private:
typedef std::allocator_traits<_Alloc> _Alloc_traits;
_Alloc m_allocator;
public:
typedef typename _Alloc_traits::allocator_type allocator_type;
typedef typename _Alloc_traits::value_type value_type;
typedef typename _Alloc_traits::pointer pointer;
typedef typename _Alloc_traits::const_pointer const_pointer;
typedef typename _Alloc_traits::value_type& reference;
typedef typename const _Alloc_traits::value_type& const_reference;
typedef typename _Alloc_traits::size_type size_type;
/*! Axon iterator. */
class iterator
{
public:
typedef typename _Alloc_traits::allocator_type allocator_type;
typedef typename _Alloc_traits::value_type value_type;
typedef typename _Alloc_traits::pointer pointer;
typedef typename _Alloc_traits::const_pointer const_pointer;
typedef typename _Alloc_traits::value_type& reference;
typedef typename const _Alloc_traits::value_type& const_reference;
typedef typename _Alloc_traits::size_type size_type;
typedef std::random_access_iterator_tag iterator_category;
iterator(pointer ptr) : m_ptr(ptr) { }
iterator(const iterator& it) = default;
~iterator(void) = default;
iterator& operator=(const iterator& it) = default;
bool operator==(const iterator& it) const {
return (m_ptr == it.m_ptr);
}
bool operator!=(const iterator& it) const {
return (m_ptr != it.m_ptr);
}
iterator& operator++() {
++m_ptr;
return *this;
}
iterator& operator++(int) {
iterator tmp = *this;
++(*this);
return tmp;
}
iterator& operator--() {
--m_ptr;
return *this;
}
iterator& operator--(int) {
iterator tmp = *this;
--(*this);
return tmp;
}
reference operator*() const {
return *m_ptr;
}
pointer operator->() const {
return m_ptr;
}
private:
pointer m_ptr;
};
/*! Axon const iterator. */
class const_iterator
{
public:
typedef typename _Alloc_traits::allocator_type allocator_type;
typedef typename _Alloc_traits::value_type value_type;
typedef typename _Alloc_traits::pointer pointer;
typedef typename _Alloc_traits::const_pointer const_pointer;
typedef typename _Alloc_traits::value_type& reference;
typedef typename const _Alloc_traits::value_type& const_reference;
typedef typename _Alloc_traits::size_type size_type;
typedef std::random_access_iterator_tag iterator_category;
const_iterator(const_pointer ptr) : m_ptr(ptr) { }
const_iterator(const const_iterator& it) = default;
const_iterator(const iterator& it) {
m_ptr = &(*it);
}
~const_iterator(void) = default;
const_iterator& operator=(const const_iterator& it) = default;
bool operator==(const const_iterator& it) const {
return (m_ptr == it.m_ptr);
}
bool operator!=(const const_iterator& it) const {
return (m_ptr != it.m_ptr);
}
const_iterator& operator++() {
++m_ptr;
return *this;
}
const_iterator operator++(int) {
const_iterator tmp = *this;
++(*this);
return tmp;
}
const_iterator& operator--() {
--m_ptr;
return *this;
}
const_iterator operator--(int) {
const_iterator tmp = *this;
--(*this);
return tmp;
}
const_reference operator*() const {
return *m_ptr;
}
const_pointer operator->() const {
return m_ptr;
}
private:
const_pointer m_ptr;
};
/*!
* \brief Construct a new Axon object.
*
* \param parent A reference to the
* neuron we are belonging to.
*/
Axon(Neuron& parent) : m_parent(parent), m_receivers{ 0x0, 0x0, nullptr } {
}
~Axon() {
for (iterator it = begin(); it != end(); ++it) {
disconnect(it, true);
}
_Alloc_traits::deallocate(m_allocator, m_receivers.receivers, m_receivers.capacity);
}
/*!
* \brief Propagates a nervous influx.
*/
void propagate(void) const {
for (const_iterator it = begin(); it != end(); ++it) {
(*it)->receive();
}
}
/*!
* \brief Binds to a remote receiver.
*
* \param receiver The remote receiver to bind to.
*
* \return True on success, false on failure.
*/
bool connect(Receiver& receiver) {
#if defined(__V_CFG_NT_SUPPORT__)
assert(receiver.getNt() == m_parent.getNt());
#endif /* defined(__V_CFG_NT_SUPPORT__) */
if (m_receivers.capacity <= m_receivers.size) {
if (!reallocate(m_receivers.size + 1)) {
return false;
}
}
_Alloc_traits::construct(m_allocator, &(*(end())), &receiver);
++(m_receivers.size);
return true;
}
/*!
* \brief Breaks all connections with the specified neuron.
*
* \param neuron The neuron to break with.
* \param rr Do we have to destruct remote receivers ?
*/
void disconnect(Neuron& neuron, bool rr = true) {
for (const_iterator it = begin(); it != end(); ++it) {
std::cout << &(*it) << " - " << &(*end()) << std::endl;
if (&((*it)->getNeuron()) == &neuron) {
(void)(disconnect(it, rr)); /* Overloaded call */
}
}
}
iterator disconnect(const_iterator position, bool rr = true) {
size_type index = -(&(*(begin())) - &(*position));
_Alloc_traits::destroy(m_allocator, &(m_receivers.receivers[index]));
for (size_type i = index; i < ((m_receivers.size) - 1); ++i) {
_Alloc_traits::construct(m_allocator, &(m_receivers.receivers[i]), m_receivers.receivers[i + 1]);
_Alloc_traits::destroy(m_allocator, &(m_receivers.receivers[i + 1]));
}
--(m_receivers.size);
iterator it = &(m_receivers.receivers[index]);
return it;
}
/*
iterator disconnect(const_iterator first, const_iterator last, bool rr = true) {
}
*/
#if defined(__V_CFG_NT_SUPPORT__)
/*!
* \brief Retrieves the neurotransmitter associated
* with the parent neuron.
*
* \return A reference to a neurotransmitter object.
*/
Neurotransmitter& getNt(void) const {
return m_parent.getNt();
}
#endif /* defined(__V_CFG_NT_SUPPORT__) */
/*!
* \brief Gets the parent neuron.
*
* \return A reference to the parent neuron.
*/
Neuron& getNeuron(void) const {
return m_parent;
}
/*!
* \brief Requests that the capacity
* be at least enough to contain n receivers.
*
* \param n Minimum capacity for the receivers array.
* If n is greater than the current capacity, the
* function causes the container to reallocate its
* storage increasing its capacity to n (Or greater).
* In all other cases, the function call does not
* cause a reallocation and the capacity is not
* affected.
*
* \return True on success, false on failure.
*/
bool reserve(size_type n) {
if (n > m_receivers.capacity) {
if (!reallocate(n)) return false;
}
m_receivers.capacity = n;
return true;
}
/*!
* \brief Returns the size of the storage space currently
* allocated for receivers, expressed in terms
* of elements.
*
* \return The storage space currently
* allocated for receivers.
*/
size_type capacity(void) const {
return m_receivers.capacity;
}
/*!
* \brief Returns the number of receivers
* connected to the axon.
*/
size_type size(void) const {
return m_receivers.size;
}
iterator begin(void) {
return iterator(m_receivers.receivers);
}
const_iterator begin(void) const {
return const_iterator(m_receivers.receivers);
}
const_iterator cbegin(void) const {
return const_iterator(m_receivers.receivers);
}
iterator end(void) {
return iterator(m_receivers.receivers + m_receivers.size);
}
const_iterator end(void) const {
return const_iterator(m_receivers.receivers + m_receivers.size);
}
const_iterator cend(void) const {
return const_iterator(m_receivers.receivers + m_receivers.size);
}
private:
/*!
* \brief Modify receivers array size.
*
* \param new_capacity The new size of the storage array.
*
* \return True on success, false on failure.
*/
bool reallocate(size_type new_capacity) {
pointer new_array = nullptr;
try {
new_array = _Alloc_traits::allocate(m_allocator, new_capacity);
}
catch (...) {
return false;
}
for (size_type i = 0; i < m_receivers.size; i++) {
_Alloc_traits::construct(m_allocator, &new_array[i], std::move(m_receivers.receivers[i]));
_Alloc_traits::destroy(m_allocator, &(m_receivers.receivers[i]));
}
_Alloc_traits::deallocate(m_allocator, m_receivers.receivers, m_receivers.capacity);
m_receivers.receivers = new_array;
m_receivers.capacity = new_capacity;
return true;
}
/*! The neuron we are belonging to. */
Neuron& m_parent;
/*! The receivers array (And its properties). */
struct {
size_type size, capacity;
pointer receivers;
} m_receivers;
};
#include <iostream>
int main()
{
Neuron n;
Receiver x(n);
Axon s(n);
s.connect(x);
s.connect(x);
s.connect(x);
s.connect(x);
s.connect(x);
s.disconnect(n, true);
/*
for (Axon<std::allocator<Receiver*>>::iterator it = s.begin(); it != s.end(); ++it) {
// std::cout << -(&(*(s.begin())) - &(*it)) << std::endl;
}
*/
//s.disconnect(n, true);
return 0;
} |
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