--- /dev/null
+
+/*******************************************************************************
+
+ 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: *************************************************/
+