| | | 1 | | using SwiftCollections; |
| | | 2 | | using System; |
| | | 3 | | |
| | | 4 | | namespace Trailblazer.Pathing; |
| | | 5 | | |
| | | 6 | | /// <summary> |
| | | 7 | | /// Small synchronized guide-wrapper pool used by hot cache-hit paths. |
| | | 8 | | /// </summary> |
| | | 9 | | internal sealed class GuidePool<T> where T : class, IGuide |
| | | 10 | | { |
| | | 11 | | private const int DefaultInitialCapacity = 128; |
| | | 12 | | private const int DefaultMaxSize = 256; |
| | | 13 | | |
| | 2884 | 14 | | private readonly object _sync = new(); |
| | | 15 | | private readonly Func<T> _create; |
| | | 16 | | private readonly Action<T> _reset; |
| | | 17 | | private readonly SwiftStack<T> _available; |
| | | 18 | | private readonly int _maxSize; |
| | | 19 | | |
| | 2884 | 20 | | public GuidePool(Func<T> create, Action<T> reset) |
| | | 21 | | { |
| | 2884 | 22 | | _create = create ?? throw new ArgumentNullException(nameof(create)); |
| | 2884 | 23 | | _reset = reset ?? throw new ArgumentNullException(nameof(reset)); |
| | 2884 | 24 | | _available = new SwiftStack<T>(DefaultInitialCapacity); |
| | 2884 | 25 | | _maxSize = DefaultMaxSize; |
| | 2884 | 26 | | } |
| | | 27 | | |
| | | 28 | | public T Rent() |
| | | 29 | | { |
| | 1676 | 30 | | lock (_sync) |
| | | 31 | | { |
| | 1676 | 32 | | if (_available.Count > 0) |
| | 1543 | 33 | | return _available.Pop(); |
| | 133 | 34 | | } |
| | | 35 | | |
| | 133 | 36 | | return _create(); |
| | 1543 | 37 | | } |
| | | 38 | | |
| | | 39 | | public void Release(T guide) |
| | | 40 | | { |
| | 1616 | 41 | | if (guide == null) |
| | 0 | 42 | | return; |
| | | 43 | | |
| | 1616 | 44 | | _reset(guide); |
| | | 45 | | |
| | 1616 | 46 | | lock (_sync) |
| | | 47 | | { |
| | 1616 | 48 | | if (_available.Count < _maxSize) |
| | 1616 | 49 | | _available.Push(guide); |
| | 1616 | 50 | | } |
| | 1616 | 51 | | } |
| | | 52 | | |
| | | 53 | | public void Destroy(T guide) |
| | | 54 | | { |
| | 8 | 55 | | if (guide != null) |
| | 8 | 56 | | _reset(guide); |
| | 8 | 57 | | } |
| | | 58 | | |
| | | 59 | | public void Clear() |
| | | 60 | | { |
| | 120 | 61 | | lock (_sync) |
| | 120 | 62 | | _available.Clear(); |
| | 120 | 63 | | } |
| | | 64 | | } |