add from giga-device, new branch added

2025-08-21 16:51:25 +08:00
commit 43bbc06bbb
1296 changed files with 264186 additions and 0 deletions
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+//-----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+// file="HLSFAllocator.Free.cs"
+// Project: StgSharp
+// AuthorGroup: Nitload Space
+// Copyright (c) Nitload Space. All rights reserved.
+//     
+// Permission is hereby granted, free of charge, to any person 
+// obtaining a copy of this software and associated documentation 
+// files (the “Software”), to deal in the Software without restriction, 
+// including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, 
+// and to permit persons to whom the Software is furnished to do so, 
+// subject to the following conditions:
+//     
+// The above copyright notice and 
+// this permission notice shall be included in all copies 
+// or substantial portions of the Software.
+//     
+// THE SOFTWARE IS PROVIDED “AS IS”, 
+// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+// ARISING FROM, OUT OF OR IN CONNECTION WITH 
+// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+// -----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using hlsfHandle = StgSharp.HighPerformance.Memory.HybridLayerSegregatedFitAllocationHandle;
+
+namespace StgSharp.HighPerformance.Memory
+{
+    public unsafe partial class HybridLayerSegregatedFitAllocator
+    {
+
+        /// <summary>
+        ///   Free allocated memory block and perform adjacent block merging
+        /// </summary>
+        /// <param name="handle">
+        ///   Handle to the allocated memory block
+        /// </param>
+        public void Free(hlsfHandle handle)
+        {
+            Entry* e = handle.EntryHandle;
+            if (e == null) {
+                return;
+            }
+            AcquireEntrySpinLock(e);
+            try
+            {
+                if (GetEntryState(e) != EntryState.Allocated) {
+                    return;
+                }
+                SetEntryState(e, EntryState.ThreadOccupied);
+
+                // Step 4: Try merge with adjacent free blocks and remove them from buckets
+                MergeAndRemoveFromBuckets(e);
+
+                // Step 5: Calculate final level and segment for the merged block
+                uint finalSize = e->Size;
+                int finalLevel = GetLevelFromSize(finalSize);
+                int finalSegment = DetermineSegmentIndex(finalSize, finalLevel);
+
+                // Step 6: Set the merged entry state to Empty (ready to be reused)
+                SetEntryState(e, EntryState.Empty);
+
+                // Step 7: Push the merged entry back to appropriate bucket
+                PushLevel(finalLevel, finalSegment, (BucketNode*)e->Position);
+
+                // Note: If mergedEntry is different from original e, the original e
+                // and any merged entries have already been freed to _entries by MergeAndRemoveFromBuckets
+            }
+            finally
+            {
+                // Step 8: Always release the spin lock
+                ReleaseEntrySpinLock(e);
+            }
+        }
+
+    }
+}