public static bool Pop <T>(UnsafeRingBuffer *ring, out T value) where T : unmanaged
{
Assert.Check(ring != null);
Assert.Check(ring->_items.Ptr != null);
if (ring->_count == 0)
{
value = default;
return(false);
}
// copy item from tail
value = *(T *)UnsafeBuffer.Element(ring->_items.Ptr, ring->_tail, ring->_items.Stride);
// move tail forward and decrement count
ring->_tail = (ring->_tail + 1) % ring->_items.Length;
ring->_count = (ring->_count - 1);
return(true);
}
public static void Push <K, V>(UnsafeHeapMin *heap, K key, V val)
where K : unmanaged, IComparable <K>
where V : unmanaged
{
if (heap->_count == heap->_items.Length)
{
if (heap->_items.Dynamic == 1)
{
ExpandHeap(heap);
}
else
{
throw new InvalidOperationException(HEAP_FULL);
}
}
// index we're bubbling up from
var bubbleIndex = heap->_count;
// assign new key/val to it
SetKeyVal(heap, bubbleIndex, key, val);
while (bubbleIndex != 1)
{
var parentIndex = bubbleIndex / 2;
var parentIndexKey = *(K *)UnsafeBuffer.Element(heap->_items.Ptr, parentIndex, heap->_items.Stride);
if (parentIndexKey.CompareTo(key) > 0)
{
GetKeyVal(heap, parentIndex, out K parentKey, out V parentVal);
SetKeyVal(heap, bubbleIndex, parentKey, parentVal);
SetKeyVal(heap, parentIndex, key, val);
bubbleIndex = parentIndex;
}
else
{
break;
}
}
heap->_count = heap->_count + 1;
}
public static void Add <T>(UnsafeList *list, T item) where T : unmanaged
{
Assert.Check(list != null);
var count = list->_count;
var items = list->_items;
// fast path
if (count < items.Length)
{
// set element
*(T *)UnsafeBuffer.Element(items.Ptr, count, items.Stride) = item;
// increment count
list->_count = count + 1;
return;
}
if (list->_items.Dynamic == false)
{
throw new InvalidOperationException(LIST_FULL);
}
// double capacity, make sure that if length is 0 then we set capacity to at least 2
SetCapacity(list, Math.Max(2, items.Length * 2));
// re-assign items after expand
items = list->_items;
// this has to hold now
Assert.Check(count < items.Length);
// set element
*(T *)UnsafeBuffer.Element(items.Ptr, count, items.Stride) = item;
// increment count
list->_count = count + 1;
}
public static T Dequeue <T>(UnsafeQueue *queue) where T : unmanaged
{
Assert.Check(queue != null);
Assert.Check(queue->_items.Ptr != null);
var count = queue->_count;
if (count == 0)
{
throw new InvalidOperationException(QUEUE_EMPTY);
}
var head = queue->_head;
var items = queue->_items;
// grab result
T result = *(T *)UnsafeBuffer.Element(items.Ptr, head, items.Stride);
// decrement count and tail index
queue->_count = (count - 1);
queue->_head = (head + 1) % items.Length;
return(result);
}
public static Entry *GetEntry(UnsafeHashCollection *collection, int index)
{
return((Entry *)UnsafeBuffer.Element(collection->Entries.Ptr, index, collection->Entries.Stride));
}
static K Key <K>(UnsafeHeapMin *heap, int index) where K : unmanaged
{
return(*(K *)UnsafeBuffer.Element(heap->_items.Ptr, index, heap->_items.Stride));
}
