00001 #ifndef _SIGX_SHARED_DISPATCHABLE_HPP_ 00002 #define _SIGX_SHARED_DISPATCHABLE_HPP_ 00003 00004 /* 00005 * Copyright 2008 Klaus Triendl 00006 * 00007 * This library is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Library General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2 of the License, or (at your option) any later version. 00011 * 00012 * This library is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Library General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Library General Public 00018 * License along with this library; if not, write to the Free 00019 * Software Foundation, 51 Franklin Street, Fifth Floor, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 00023 #include <sigc++/reference_wrapper.h> 00024 #include <sigxconfig.h> 00025 #include <sigx/fwddecl.h> 00026 #include <sigx/dispatchable.h> 00027 00028 00029 namespace sigx 00030 { 00031 00050 class SIGX_API shared_dispatchable: public dispatchable 00051 { 00052 friend struct DispatcherPtr; 00053 // must get the dispatcher ptr over dispatcher() for assertions 00054 friend class tunnel_validity_tracker; 00055 00056 00057 public: 00059 // * 00060 // * A DispatcherPtr is constructed from a dispatchable and references the 00061 // * dispatcher of the dispatchable. A read lock ensures threadsafe access to 00062 // * the reference (the owner thread sets a read/write lock when it sets 00063 // * the reference to 0). 00064 // * After you have constructed a DispatcherPtr, you *must* test for null. 00065 // */ 00066 //class DispatcherPtr 00067 //{ 00068 //public: 00069 // explicit DispatcherPtr(shared_dispatchable& _A_disp): 00070 // m_locker(*_A_disp.m_disp_ptr) 00071 // {} 00072 // 00073 // /** @short Returns a plain dispatcher* 00074 // */ 00075 // dispatcher_ptr operator ->() 00076 // { return access_acquiree(m_locker); } 00077 // operator bool() 00078 // { return access_acquiree(m_locker); } 00079 // bool operator !() 00080 // { return !access_acquiree(m_locker); } 00081 // bool operator !=(dispatcher_ptr other) 00082 // { return other != access_acquiree(m_locker); } 00083 // 00084 //private: 00085 // readlock_acquirer<internal::rwlockable_dispatcher_ptr> m_locker; 00086 //}; 00087 class DispatcherPtr; 00088 00089 00090 public: 00094 shared_dispatchable(); 00095 00098 shared_dispatchable(const dispatchable& d) throw(); 00101 shared_dispatchable& operator =(const dispatchable& d) throw(); 00102 }; 00103 00104 00105 } // namespace sigx 00106 00107 00108 #endif // end file guard