new audio engine backend for native CoreAudio audio I/O, and PortMIDI for MIDI.

Code builds, runs and functions. Full code review still pending, and some possibly changes to organization of code within the backend is possible

libs/backends/wavesaudio/wavesapi/refmanager/WCRefManager.h

@@ -0,0 +1,80 @@
+/*
+    Copyright (C) 2013 Waves Audio Ltd.
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+#ifndef WCREFMANAGER_H
+#define WCREFMANAGER_H
+
+
+#define SAFE_RELEASE(p) if (p) {p->Release(); p = NULL;}
+
+
+//In order to use this interface, derive the Interface class
+//from WCRefManager_Interface and derive the implementation class
+//from WCRefManager_Impl. Further, in the implementation class
+//declaration, place the macro WCREFMANAGER_IMPL.
+class WCRefManager_Interface
+{
+public:
+	/// Constructor.
+	WCRefManager_Interface() {};
+	/// Destructor.
+	virtual ~WCRefManager_Interface() {};
+	/// Adds a reference to class.
+	virtual void AddRef() = 0;
+	/// Decrements reference count and deletes the object if reference count becomes zero.
+	virtual void Release() = 0;
+};
+
+///! See details at WCRefManager_Interface for how to use this.
+class WCRefManager_Impl
+{
+public:
+    WCRefManager_Impl () : m_RefCount(1) {}
+    virtual ~WCRefManager_Impl() {}
+protected:
+	/// Variable to store reference count.
+	unsigned int m_RefCount;
+
+/// Helper to put implementation in an interface derived class, don't forget to
+/// derive the impl from WCRefManager_Impl
+#define WCREFMAN_IMPL \
+    public: \
+        virtual void AddRef() {m_RefCount++;} \
+        virtual void Release() {m_RefCount--; if (m_RefCount<=0) delete this;}
+
+};
+
+
+class WCRefManager
+{
+public:
+	/// Construcotr.
+	WCRefManager();
+	/// Destructor.
+	virtual ~WCRefManager();
+	/// Adds a reference to class.
+	void AddRef();
+	/// Decrements reference count and deletes the object if reference count becomes zero.
+	void Release();
+
+private:
+	/// Variable to store reference count.
+	unsigned int m_RefCount;
+};
+
+#endif // WCREFMANAGER_H