| /* |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| namespace DotPulsar.Internal; |
| |
| using System.Collections.Generic; |
| |
| public sealed class IdLookup<T> where T : class |
| { |
| private T?[] _items; |
| |
| public IdLookup() |
| => _items = new T[1]; |
| |
| public bool IsEmpty() |
| { |
| lock (_items) |
| { |
| for (var i = 0; i < _items.Length; ++i) |
| { |
| if (_items[i] is not null) |
| return false; |
| } |
| |
| return true; |
| } |
| } |
| |
| public ulong Add(T item) |
| { |
| lock (_items) |
| { |
| for (var i = 0; i < _items.Length; ++i) |
| { |
| if (_items[i] is not null) |
| continue; |
| |
| _items[i] = item; |
| return (ulong) i; |
| } |
| |
| var newArray = new T[_items.Length + 1]; |
| _items.CopyTo(newArray, 0); |
| var id = newArray.Length - 1; |
| newArray[id] = item; |
| _items = newArray; |
| return (ulong) id; |
| } |
| } |
| |
| public T? Remove(ulong id) |
| { |
| lock (_items) |
| { |
| var item = _items[(int) id]; |
| _items[(int) id] = null; |
| return item; |
| } |
| } |
| |
| public T[] RemoveAll() |
| { |
| lock (_items) |
| { |
| var items = new List<T>(); |
| |
| for (var i = 0; i < _items.Length; ++i) |
| { |
| var item = _items[i]; |
| |
| if (item is not null) |
| { |
| items.Add(item); |
| _items[i] = null; |
| } |
| } |
| |
| return items.ToArray(); |
| } |
| } |
| |
| public T? this[ulong id] |
| { |
| get |
| { |
| lock (_items) |
| { |
| return _items[(int) id]; |
| } |
| } |
| } |
| } |