1 files changed, 102 insertions, 0 deletions
diff --git a/src/VBox/NetworkServices/NetLib/shared_ptr.h b/src/VBox/NetworkServices/NetLib/shared_ptr.h
new file mode 100644
index 00000000..42d32fb0
--- /dev/null
+++ b/src/VBox/NetworkServices/NetLib/shared_ptr.h
@@ -0,0 +1,102 @@
+/* $Id: shared_ptr.h $ */
+/** @file
+ * Simplified shared pointer.
+ */
+
+/*
+ * Copyright (C) 2013-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+#ifndef VBOX_INCLUDED_SRC_NetLib_shared_ptr_h
+#define VBOX_INCLUDED_SRC_NetLib_shared_ptr_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#ifdef __cplusplus
+template<typename T>
+class SharedPtr
+{
+    struct imp
+    {
+        imp(T *pTrg = NULL, int cnt = 1): ptr(pTrg),refcnt(cnt){}
+        ~imp() { if (ptr) delete ptr;}
+
+        T *ptr;
+        int refcnt;
+    };
+
+
+    public:
+    SharedPtr(T *t = NULL):p(NULL)
+    {
+        p = new imp(t);
+    }
+
+    ~SharedPtr()
+    {
+        p->refcnt--;
+
+        if (p->refcnt == 0)
+            delete p;
+    }
+
+
+    SharedPtr(const SharedPtr& rhs)
+    {
+        p = rhs.p;
+        p->refcnt++;
+    }
+
+    const SharedPtr& operator= (const SharedPtr& rhs)
+    {
+        if (p == rhs.p) return *this;
+
+        p->refcnt--;
+        if (p->refcnt == 0)
+            delete p;
+
+        p = rhs.p;
+        p->refcnt++;
+
+        return *this;
+    }
+
+
+    T *get() const
+    {
+        return p->ptr;
+    }
+
+
+    T *operator->()
+    {
+        return p->ptr;
+    }
+
+
+    const T*operator->() const
+    {
+        return p->ptr;
+    }
+
+
+    int use_count()
+    {
+        return p->refcnt;
+    }
+
+    private:
+    imp *p;
+};
+#endif
+
+#endif /* !VBOX_INCLUDED_SRC_NetLib_shared_ptr_h */