1 files changed, 144 insertions, 0 deletions
diff --git a/src/RefPtr.h b/src/RefPtr.h
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+++ b/src/RefPtr.h
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+/*
+ * vdr-vodcatcher - A plugin for the Linux Video Disk Recorder
+ * Copyright (c) 2007 - 2008 Tobias Grimm <vdr@e-tobi.net>
+ *
+ * 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; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * $Id: RefPtr.h 7652 2008-08-05 21:37:57Z svntobi $
+ *
+ */
+
+#ifndef ___REFPTR__H
+#define ___REFPTR__H
+
+#include <stddef.h>
+
+//
+// A small note: RefPtr can cope with incomplete types as described in
+// http://www.octopull.demon.co.uk/arglib/TheGrin.html by Alan Griffiths
+//
+
+template<class X> class RefPtr
+{
+    typedef void (*DeleteFunction)(X* pointer);
+
+private:
+    X* managedPointer;
+    int* refCounter;
+    DeleteFunction deleteFunction;
+
+public:
+    explicit RefPtr(X* ptr = 0) :
+        deleteFunction(DeleteManagedPointer)
+    {
+        ManagePointer(ptr);
+    }
+
+    RefPtr(const RefPtr& refPtr) :
+        deleteFunction(DeleteManagedPointer)
+    {
+        AttachToForeignRefPtr(refPtr.get(), refPtr.refCounter);
+    }
+
+    ~RefPtr()
+    {
+        ReleasePointer();
+    }
+
+    X* get() const
+    {
+        return managedPointer;
+    }
+
+    X* operator->() const
+    {
+        return managedPointer;
+    }
+
+    X& operator*() const
+    {
+        return *managedPointer;
+    }
+
+    RefPtr& operator=(const RefPtr& refPtr)
+    {
+        if (this != &refPtr)
+        {
+            ReleasePointer();
+
+            AttachToForeignRefPtr(refPtr.get(), refPtr.refCounter);
+        }
+
+        return *this;
+    }
+
+    RefPtr operator=(X* ptr)
+    {
+        if (this->managedPointer != ptr)
+        {
+            ReleasePointer();
+            ManagePointer(ptr);
+        }
+
+        return *this;
+    }
+
+    template<class Y> RefPtr(const RefPtr<Y> &refPtr) :
+        deleteFunction(DeleteManagedPointer)
+    {
+        AttachToForeignRefPtr(refPtr.get(), refPtr.refCounter);
+    }
+
+    bool IsAssigned() const
+    {
+        return (managedPointer != NULL);
+    }
+
+private:
+    template<class Y> friend class RefPtr;
+
+    void ReleasePointer()
+    {
+        if (*refCounter > 0)
+        {
+            (*refCounter)--;
+        }
+        else
+        {
+            deleteFunction(managedPointer);
+            delete refCounter;
+        }
+    }
+
+    void AttachToForeignRefPtr(X* foreignPtr, int* foreignRefCounter)
+    {
+        refCounter = foreignRefCounter;
+        (*refCounter)++;
+        managedPointer = foreignPtr;
+    }
+
+    void ManagePointer(X* ptr)
+    {
+        this->managedPointer = ptr;
+        refCounter = new int(0);
+    }
+
+    static void DeleteManagedPointer(X* pointer)
+    {
+        delete pointer;
+    }
+};
+
+#endif