1 files changed, 112 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..a7a488a7
--- /dev/null
+++ b/src/VBox/NetworkServices/NetLib/shared_ptr.h
@@ -0,0 +1,112 @@
+/* $Id: shared_ptr.h $ */
+/** @file
+ * Simplified shared pointer.
+ */
+
+/*
+ * Copyright (C) 2013-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#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 */