objectpool.hh
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00001 #ifndef SIM_OBJECTPOOL_HH
00002 #define SIM_OBJECTPOOL_HH
00003 
00004 #include <list>
00005 #include <boost/noncopyable.hpp>
00006 #include <boost/thread/mutex.hpp>
00007 #include <utilmm/memory/sweep.hh>
00008 
00009 namespace utilmm
00010 {
00011     namespace pools
00012     {
00021         template<typename T>
00022         class object_pool : boost::noncopyable
00023         {
00024             boost::mutex m_mutex;
00025             std::list<T*> m_available;
00026 
00027             typedef boost::mutex mutex;
00028 
00029         public:
00030             ~object_pool()
00031             { sweep(m_available.begin(), m_available.end()); }
00032 
00033             T* get() 
00034             { mutex::scoped_lock lock(m_mutex); 
00035                 if (m_available.empty())
00036                     m_available.push_back(new T());
00037 
00038                 T* ret = m_available.front();
00039                 m_available.pop_front();
00040                 return ret;
00041             }
00042 
00043             void put(T* object)
00044             { mutex::scoped_lock lock(m_mutex);
00045                 m_available.push_back(object);
00046             }
00047         };
00048 
00052         template<typename T>
00053         class use : boost::noncopyable
00054         {
00055             object_pool<T>& m_pool;
00056             T* m_object;
00057         
00058         public:
00059             use(object_pool<T>& pool)
00060                 : m_pool(pool), m_object(pool.get()) {}
00061             ~use() { m_pool.put(m_object); }
00062 
00063             T* operator -> () { return m_object; }
00064             T const* operator ->() const { return m_object; }
00065             T& operator *() { return *m_object; }
00066             T const& operator *() const { return *m_object; }
00067         };
00068     }
00069 }
00070 
00071 #endif
00072 


utilmm
Author(s): Sylvain Joyeux/sylvain.joyeux@m4x.org
autogenerated on Wed Sep 16 2015 07:05:43