From 81ff940d1bea07447f8218ab9a764fbf393431e8 Mon Sep 17 00:00:00 2001
From: Charles McGarvey <chazmcgarvey@brokenzipper.com>
Date: Sat, 23 Jan 2010 18:19:16 -0700
Subject: [PATCH] included manager class

---
 src/Moof/Manager.hh | 116 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 src/Moof/Manager.hh

diff --git a/src/Moof/Manager.hh b/src/Moof/Manager.hh
new file mode 100644
index 0000000..89c2076
--- /dev/null
+++ b/src/Moof/Manager.hh
@@ -0,0 +1,116 @@
+
+/*******************************************************************************
+
+ Copyright (c) 2009, Charles McGarvey
+ All rights reserved.
+ 
+ Redistribution   and   use  in  source  and  binary  forms,  with  or  without
+ modification, are permitted provided that the following conditions are met:
+ 
+   * Redistributions  of  source  code  must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   * Redistributions  in binary form must reproduce the above copyright notice,
+     this  list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+ 
+ THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*******************************************************************************/
+
+#ifndef _MOOF_MANAGER_HH_
+#define _MOOF_MANAGER_HH_
+
+/**
+ * @file Manager.hh
+ * A library is a collection of named objects of the same type.  Libraries use
+ * reference counting to automagically delete objects which no longer have any
+ * interested code.
+ */
+
+#include <string>
+
+#include <boost/shared_ptr.hpp>
+
+#include <Moof/Hash.hh>
+
+
+namespace Mf {
+
+
+template <class T>
+class Manager
+{
+public:
+
+	Manager() :
+		mRetainCount(1) {}
+
+	const std::string& getName() const
+	{
+		return mName;
+	}
+
+	static boost::shared_ptr<T> getInstance(const std::string& name)
+	{
+		return boost::shared_ptr<T>(retain(name), &release);
+	}
+
+private:
+
+	typedef stlplus::hash<std::string,T*,getHash> PtrMap;
+
+	static PtrMap	mPtrMap;
+	std::string		mName;
+	unsigned		mRetainCount;
+
+	static T* retain(const std::string& name)
+	{
+		typename PtrMap::iterator it = mPtrMap.find(name);
+
+		if (it != mPtrMap.end())
+		{
+			++((*it).second->mRetainCount);
+			return (*it).second;
+		}
+		else
+		{
+			T* newObj(new T);
+			if (newObj)
+			{
+				newObj->mName = name;
+				newObj->init(name);
+				mPtrMap.insert(std::make_pair(name, newObj));
+			}
+			return newObj; 
+		}
+	}
+
+	static void release(T* obj)
+	{
+		if (--(obj->mRetainCount) == 0)
+		{
+			mPtrMap.erase(obj->mName);
+			delete obj;
+		}
+	}
+};
+
+template <class T>
+stlplus::hash<std::string,T*,getHash> Manager<T>::mPtrMap;
+
+
+} // namespace Mf
+
+#endif // _MOOF_MANAGER_HH_
+
+/** vim: set ts=4 sw=4 tw=80: *************************************************/
+
-- 
2.45.2