[ZooLib-checkins] SF.net SVN: zoolib:[2182] trunk/zoolib/source/cxx/zoolib/ZUtil_CF_Context.h

[<ag...@us...>]

Revision: 2182
          http://zoolib.svn.sourceforge.net/zoolib/?rev=2182&view=rev
Author:   agreen
Date:     2011-06-15 13:33:33 +0000 (Wed, 15 Jun 2011)

Log Message:
-----------
ZUtil_CF::Context simplifies the process of using a
refcounted entity with CF context callbacks.

Added Paths:
-----------
    trunk/zoolib/source/cxx/zoolib/ZUtil_CF_Context.h

Added: trunk/zoolib/source/cxx/zoolib/ZUtil_CF_Context.h
===================================================================
--- trunk/zoolib/source/cxx/zoolib/ZUtil_CF_Context.h	                        (rev 0)
+++ trunk/zoolib/source/cxx/zoolib/ZUtil_CF_Context.h	2011-06-15 13:33:33 UTC (rev 2182)
@@ -0,0 +1,105 @@
+/* -------------------------------------------------------------------------------------------------
+Copyright (c) 2011 Andrew Green
+http://www.zoolib.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+and associated documentation files (the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES
+OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------------------------- */
+
+#ifndef __ZUtil_CF_Context__
+#define __ZUtil_CF_Context__ 1
+#include "zconfig.h"
+#include "zoolib/ZCONFIG_SPI.h"
+
+#if ZCONFIG_SPI_Enabled(CFType)
+
+#include "zoolib/ZRef.h"
+
+namespace ZooLib {
+namespace ZUtil_CF {
+
+// =================================================================================================
+#pragma mark -
+#pragma mark * ZUtil_CF::Context
+
+template <class T>
+class Context
+:	public T
+	{
+public:
+	Context()
+		{
+		T::version = 0;
+		T::info = nullptr;
+		T::retain = nullptr;
+		T::release = nullptr;
+		T::copyDescription = nullptr;
+		}
+
+	Context(const Context& iOther)
+		{
+		T::version = iOther.version;
+		T::info = iOther.info;
+		T::retain = iOther.retain;
+		T::release = iOther.release;
+		T::copyDescription = iOther.copyDescription;
+		}
+
+	~Context()
+		{
+		T::release(T::info);
+		}
+
+	Context& operator=(const Context& iOther)
+		{
+		if (iOther.retain)
+			iOther.retain(iOther.info);
+		
+		if (T::release)
+			T::release(T::info);
+
+		T::version = iOther.version;
+		T::info = iOther.info;
+		T::retain = iOther.retain;
+		T::release = iOther.release;
+		T::copyDescription = iOther.copyDescription;
+
+		return *this;
+		}
+
+	template <class O>
+	Context(const ZRef<O>& iRef)
+		{
+		T::version = 0;
+		T::info = iRef.Get();
+		T::retain = (CFAllocatorRetainCallBack)&ZRef<O>::sCFRetain;
+		T::release = (CFAllocatorReleaseCallBack)&ZRef<O>::sCFRelease;
+		T::copyDescription = nullptr;
+		T::retain(T::info);
+		}
+
+	const T* IParam() const
+		{ return this; }
+
+	T* IParam()
+		{ return this; }
+	};
+
+} // namespace ZUtil_CF
+} // namespace ZooLib
+
+#endif // ZCONFIG_SPI_Enabled(CFType)
+
+#endif // __ZUtil_CF_Context__


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