Struct FragmentableNativeList<TItem>

Holds two lists. Items list holds values. EmptySlots holds vacant indexes, so when you add item through Add() function, it places it into Items list in the vacant slot (if any). When you call RemoveAt() item, it makes the given itemIndex vacant to be filled later with Add() function

Implements
Inherited Members
Namespace: Fwt.Core.Collections
Assembly: fwt.core.dll
Syntax
public struct FragmentableNativeList<TItem> : IDisposable where TItem : unmanaged
Type Parameters
Name Description
TItem

Fields

EmptySlots

Array of empty (vacant) slots. When item is added, it checks if there are any empty slots. If empty slot is found, it is used to store the item. If no empty slots are found, the item is added to the end of the list.

Declaration
public NativeList<int> EmptySlots
Field Value
Type Description
NativeList<int>

ItemSlots

Here the items are stored, but this list is fragmented, so may contain empty (vacant) slots

Declaration
public NativeList<TItem> ItemSlots
Field Value
Type Description
NativeList<TItem>

SortedEmptySlots

Key = index of the empty slot Data = index of the record about the empty slot in the EmptySlots list

Declaration
public NativeHashMap<int, int> SortedEmptySlots
Field Value
Type Description
NativeHashMap<int, int>

SortedOccupiedSlots

Key = index of the occupied slot in ItemSlots list;

Declaration
public NativeHashSet<int> SortedOccupiedSlots
Field Value
Type Description
NativeHashSet<int>

Properties

Count

Amount of Items in all NON-empty slots

Declaration
public int Count { get; }
Property Value
Type Description
int

this[int]

Gets an item from the ItemSlots list. DOES NOT DO any checks for null or something, so NullReferenceException is possible

Declaration
public TItem this[int index] { get; set; }
Parameters
Type Name Description
int index
Property Value
Type Description
TItem

Methods

Add(TItem)

Returns the index this item is added to

Declaration
public int Add(TItem item)
Parameters
Type Name Description
TItem item
Returns
Type Description
int

Clear()

Declaration
public void Clear()

Dispose()

Declaration
public void Dispose()

GetOccupiedIndexesArray(Allocator)

Creates a native array filled with indexes of occupied slots in ItemSlots array, so you can take the data by this indexes from ItemSlots or by using indexer to get the items that are not 'deleted'

Declaration
public NativeArray<int> GetOccupiedIndexesArray(Allocator allocator)
Parameters
Type Name Description
Allocator allocator
Returns
Type Description
NativeArray<int>

Init(Allocator)

Ensures that internal collections are initialized

Declaration
public void Init(Allocator allocator)
Parameters
Type Name Description
Allocator allocator

IsEmptySlot(int, out int)

Declaration
public bool IsEmptySlot(int itemIndex, out int emptySlotIndex)
Parameters
Type Name Description
int itemIndex
int emptySlotIndex
Returns
Type Description
bool

MarkSlotOccupied(int)

Adds a record about that given itemIndex slot is occupied. Removes the record from EmptySlots about this itemIndex

Declaration
public bool MarkSlotOccupied(int itemIndex)
Parameters
Type Name Description
int itemIndex
Returns
Type Description
bool

RemoveAt(int)

Makes the itemIndex slot vacant to be filled later. Does not really removes an item from Items list, so it is not resized and items are preserver their indexes

Declaration
public bool RemoveAt(int itemIndex)
Parameters
Type Name Description
int itemIndex
Returns
Type Description
bool

RemoveEmptySlot(int)

Removes an empty slot for item with given index. itemIndex is an index in Items list.

Declaration
public bool RemoveEmptySlot(int itemIndex)
Parameters
Type Name Description
int itemIndex
Returns
Type Description
bool

Set(int, TItem)

Declaration
public int Set(int index, TItem item)
Parameters
Type Name Description
int index
TItem item
Returns
Type Description
int

TryGetItem(int, out TItem)

Validates the requested itemIndex and also checks if the requested itemIndex slot is empty. Returns false if validation has not passed or slot is empty. Returns true if validation has passed and there is an item at requested index; out item contains the requested value. out item is default if there is no value found

Declaration
public bool TryGetItem(int itemIndex, out TItem item)
Parameters
Type Name Description
int itemIndex
TItem item
Returns
Type Description
bool

Implements

Extension Methods