1 files changed, 77 insertions, 0 deletions
diff --git a/src/inc/releaseholder.h b/src/inc/releaseholder.h
new file mode 100644
index 0000000000..b2c42e3928
--- /dev/null
+++ b/src/inc/releaseholder.h
@@ -0,0 +1,77 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+// This class acts a smart pointer which calls the Release method on any object
+// you place in it when the ReleaseHolder class falls out of scope.  You may use it
+// just like you would a standard pointer to a COM object (including if (foo),
+// if (!foo), if (foo == 0), etc) except for two caveats:
+//     1. This class never calls AddRef and it always calls Release when it
+//        goes out of scope.
+//     2. You should never use & to try to get a pointer to a pointer unless
+//        you call Release first, or you will leak whatever this object contains
+//        prior to updating its internal pointer.
+template<class T>
+class ReleaseHolder
+{
+public:
+    ReleaseHolder()
+        : m_ptr(NULL)
+    {}
+    
+    ReleaseHolder(T* ptr)
+        : m_ptr(ptr)
+    {}
+    
+    ~ReleaseHolder()
+    {
+        Release();
+    }
+
+    void operator=(T *ptr)
+    {
+        Release();
+
+        m_ptr = ptr;
+    }
+
+    T* operator->()
+    {
+        return m_ptr;
+    }
+
+    operator T*()
+    {
+        return m_ptr;
+    }
+
+    T** operator&()
+    {
+        return &m_ptr;
+    }
+
+    T* GetPtr() const
+    {
+        return m_ptr;
+    }
+
+    T* Detach()
+    {
+        T* pT = m_ptr;
+        m_ptr = NULL;
+        return pT;
+    }
+    
+    void Release()
+    {
+        if (m_ptr != NULL)
+        {
+            m_ptr->Release();
+            m_ptr = NULL;
+        }
+    }
+
+private:
+    T* m_ptr;    
+};
+