From d411db421bc1da2ade0ac79f2c0ce6445a7852e8 Mon Sep 17 00:00:00 2001
From: Kirk McKelvey <kirkoman@gmail.com>
Date: Fri, 24 Mar 2023 10:56:43 -0400
Subject: [PATCH] fix: close ObjectPool race condition (IntelRealSense#8334)

---
 .../Intel.RealSense/Helpers/ObjectPool.cs      | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/wrappers/csharp/Intel.RealSense/Helpers/ObjectPool.cs b/wrappers/csharp/Intel.RealSense/Helpers/ObjectPool.cs
index 3ca525b117..44a0da6a7a 100644
--- a/wrappers/csharp/Intel.RealSense/Helpers/ObjectPool.cs
+++ b/wrappers/csharp/Intel.RealSense/Helpers/ObjectPool.cs
@@ -74,23 +74,17 @@ private static object CreateInstance(Type t, IntPtr ptr)
         private static object Get(Type t, IntPtr ptr)
         {
             var stack = GetPool(t);
-            int count;
             lock ((stack as ICollection).SyncRoot)
             {
-                count = stack.Count;
-            }
-
-            if (count > 0)
-            {
-                Base.PooledObject obj;
-                lock ((stack as ICollection).SyncRoot)
+                if (stack.Count > 0)
                 {
+                    Base.PooledObject obj;
                     obj = stack.Pop();
-                }
 
-                obj.m_instance.Reset(ptr);
-                obj.Initialize();
-                return obj;
+                    obj.m_instance.Reset(ptr);
+                    obj.Initialize();
+                    return obj;
+                }
             }
 
             return CreateInstance(t, ptr);