Lucene.Net.Store.OutputStreamDataOutput: Allow double-dispose calls a…

…nd guard against usage after Dispose(). See #265.
apache · May 16, 2023 · e9c47b2 · e9c47b2
1 parent 5336dfc
commit e9c47b2
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/Lucene.Net/Store/OutputStreamDataOutput.cs b/src/Lucene.Net/Store/OutputStreamDataOutput.cs
@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Threading;
 
 namespace Lucene.Net.Store
 {
@@ -26,6 +27,7 @@ namespace Lucene.Net.Store
     public class OutputStreamDataOutput : DataOutput, IDisposable
     {
         private readonly Stream _os;
+        private int disposed = 0; // LUCENENET specific - allow double-dispose
 
         public OutputStreamDataOutput(Stream os)
         {
@@ -60,6 +62,8 @@ public void Dispose()
         // LUCENENET specific - implemented proper dispose pattern
         protected virtual void Dispose(bool disposing)
         {
+            if (0 != Interlocked.CompareExchange(ref this.disposed, 1, 0)) return; // LUCENENET specific - allow double-dispose
+
             if (disposing)
             {
                 _os.Dispose();