included manager class
authorCharles McGarvey <chazmcgarvey@brokenzipper.com>
Sun, 24 Jan 2010 01:19:16 +0000 (18:19 -0700)
committerCharles McGarvey <chazmcgarvey@brokenzipper.com>
Sun, 24 Jan 2010 01:19:16 +0000 (18:19 -0700)
src/Moof/Manager.hh [new file with mode: 0644]

diff --git a/src/Moof/Manager.hh b/src/Moof/Manager.hh
new file mode 100644 (file)
index 0000000..89c2076
--- /dev/null
@@ -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: *************************************************/
+
This page took 0.020602 seconds and 4 git commands to generate.