bugfix - multithread allocator span

ikpil · ikpil · commit 0aaaf0d02b9f · 2025-04-12T14:02:48.000+09:00
diff --git a/src/Box2D.NET/B2ArenaAllocator.cs b/src/Box2D.NET/B2ArenaAllocator.cs
@@ -27,7 +27,7 @@ public B2ArenaAllocator(int capacity)
         public B2ArenaAllocatorTyped<T> GetOrCreateFor<T>() where T : new()
         {
             var index = B2ArenaAllocatorIndexer.Index<T>();
-            if (_allocators.Length <= index)
+            if (_allocators.Length <= index || null == _allocators[index])
             {
                 lock (_lock)
                 {
@@ -42,13 +42,7 @@ public B2ArenaAllocator(int capacity)
 
                         _allocators = temp;
                     }
-                }
-            }
-
-            if (null == _allocators[index])
-            {
-                lock (_lock)
-                {
+                    
                     // new 
                     if (null == _allocators[index])
                     {

Original file line number	Diff line number	Diff line change
`@@ -27,7 +27,7 @@ public B2ArenaAllocator(int capacity)`
`27`	`27`	`public B2ArenaAllocatorTyped<T> GetOrCreateFor<T>() where T : new()`
`28`	`28`	`{`
`29`	`29`	`var index = B2ArenaAllocatorIndexer.Index<T>();`
`30`		`- if (_allocators.Length <= index)`
	`30`	`+ if (_allocators.Length <= index \|\| null == _allocators[index])`
`31`	`31`	`{`
`32`	`32`	`lock (_lock)`
`33`	`33`	`{`
`@@ -42,13 +42,7 @@ public B2ArenaAllocator(int capacity)`
`42`	`42`
`43`	`43`	`_allocators = temp;`
`44`	`44`	`}`
`45`		`- }`
`46`		`- }`
`47`		`-`
`48`		`- if (null == _allocators[index])`
`49`		`- {`
`50`		`- lock (_lock)`
`51`		`- {`
	`45`	`+`
`52`	`46`	`// new`
`53`	`47`	`if (null == _allocators[index])`
`54`	`48`	`{`