/*
* This method should be used with care. In particular, it is wrong to detach from a freelist
* while iterating over it unless the detach stops further iteration.
*/
void
detachInternal(MM_HeapRegionDescriptorSegregated *cur)
{
_length--;
MM_HeapRegionDescriptorSegregated *prev = cur->getPrev();
MM_HeapRegionDescriptorSegregated *next = cur->getNext();
if (prev != NULL) {
Assert_MM_true(prev->getNext() == cur);
prev->setNext(next);
} else {
Assert_MM_true(cur == _head);
}
if (next != NULL) {
Assert_MM_true(next->getPrev() == cur);
next->setPrev(prev);
} else {
Assert_MM_true(cur == _tail);
}
cur->setPrev(NULL);
cur->setNext(NULL);
if (_head == cur) {
_head = next;
}
if (_tail == cur) {
_tail = prev;
}
}
MM_HeapRegionDescriptorSegregated *dequeueInternal()
{
MM_HeapRegionDescriptorSegregated *result = _head;
if (_head != NULL) {
_length--;
_head = result->getNext();
result->setNext(NULL);
if (NULL == _head) {
_tail = NULL;
} else {
_head->setPrev(NULL);
}
}
return result;
}
