1 files changed, 95 insertions, 0 deletions
diff --git a/lib/VNLib.Data.Caching.ObjectCache/src/BlobCacheBucket.cs b/lib/VNLib.Data.Caching.ObjectCache/src/BlobCacheBucket.cs
new file mode 100644
index 0000000..f79db3f
--- /dev/null
+++ b/lib/VNLib.Data.Caching.ObjectCache/src/BlobCacheBucket.cs
@@ -0,0 +1,95 @@
+/*
+* Copyright (c) 2023 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Data.Caching.ObjectCache
+* File: BlobCacheBucket.cs 
+*
+* BlobCacheBucket.cs is part of VNLib.Data.Caching.ObjectCache which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Data.Caching.ObjectCache is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU Affero General Public License as 
+* published by the Free Software Foundation, either version 3 of the
+* License, or (at your option) any later version.
+*
+* VNLib.Data.Caching.ObjectCache is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU Affero General Public License for more details.
+*
+* You should have received a copy of the GNU Affero General Public License
+* along with this program.  If not, see https://www.gnu.org/licenses/.
+*/
+
+using System.Threading;
+using System.Threading.Tasks;
+
+using VNLib.Utils.Memory;
+
+namespace VNLib.Data.Caching.ObjectCache
+{
+    public sealed class BlobCacheBucket : IBlobCacheBucket
+    {
+        private readonly IBlobCache _cacheTable;
+        private readonly SemaphoreSlim _lock;
+
+        /// <summary>
+        /// Initialzies a new <see cref="BlobCacheBucket"/> and its underlying
+        /// <see cref="IBlobCache"/>
+        /// </summary>
+        /// <param name="bucketCapacity">
+        /// The maxium number of entries allowed in the LRU cache
+        /// before LRU overflow happens.
+        /// </param>
+        /// <param name="heap">The heap to allocate object cache buffers</param>
+        public BlobCacheBucket(int bucketCapacity, IUnmangedHeap heap)
+        {
+            _lock = new(1, 1);
+            _cacheTable = new BlobCache(bucketCapacity, heap);
+        }
+
+        ///<inheritdoc/>
+        public void Dispose()
+        {
+            _cacheTable.Dispose();
+            _lock.Dispose();
+        }
+
+        ///<inheritdoc/>
+        public async ValueTask<IBlobCache> ManualWaitAsync(CancellationToken cancellation)
+        {
+            //try to enter the lock synchronously
+            if (_lock.Wait(0, CancellationToken.None))
+            {
+                return _cacheTable;
+            }
+            else
+            {
+                await _lock.WaitAsync(cancellation).ConfigureAwait(false);
+                return _cacheTable;
+            }
+        }
+
+        ///<inheritdoc/>
+        public void Release()
+        {
+            _lock.Release();
+        }
+
+        ///<inheritdoc/>
+        public async ValueTask<CacheBucketHandle> WaitAsync(CancellationToken cancellation)
+        {
+            //try to enter the lock synchronously
+            if (_lock.Wait(0, CancellationToken.None))
+            {
+                return new(this, _cacheTable);
+            }
+            else
+            {
+                await _lock.WaitAsync(cancellation).ConfigureAwait(false);
+                return new(this, _cacheTable);
+            }
+        }
+    }
+}