// ------------------------------------------------------------------------------------------------
void Signal::Tail(Object & env, Function & func)
{
// Don't attempt to search anything if there's no head
if (m_Head == nullptr)
{
m_Head = new Slot(env, func, nullptr);
// We're done here
return;
}
const Slot slot{env, func};
// Don't attempt to search anything if there's only one element
if (m_Head->mNext == nullptr)
{
// Is it already inserted?
if (*m_Head != slot)
{
m_Head->mNext = new Slot(env, func, nullptr);
// Link with the head
m_Head->mNext->mPrev = m_Head;
}
// We're done here
return;
}
// Grab the head node
Slot * node = m_Head, * prev = nullptr;
// Walk down the chain and find a matching node
for (; node != nullptr; prev = node, node = node->mNext)
{
if (*node == slot)
{
break; // Found it
}
}
// Have we found anything?
if (node == nullptr)
{
// Create the slot now
node = new Slot(env, func, nullptr);
}
else
{
// Walk down the chain until the end
while (prev->mNext != nullptr)
{
prev = prev->mNext;
}
// Finally, detach the node from it's current position
node->Detach();
}
// Knowing 'prev' points to last element
node->AttachPrev(prev);
}
