00001 // $Id: SignalEvent.ih 1742 2010-11-04 14:51:56Z g0dil $ 00002 // 00003 // Copyright (C) 2008 00004 // Fraunhofer (FOKUS) 00005 // Competence Center NETwork research (NET), St. Augustin, GERMANY 00006 // Stefan Bund <g0dil@berlios.de> 00007 // 00008 // This program is free software; you can redistribute it and/or modify 00009 // it under the terms of the GNU General Public License as published by 00010 // the Free Software Foundation; either version 2 of the License, or 00011 // (at your option) any later version. 00012 // 00013 // This program is distributed in the hope that it will be useful, 00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 // GNU General Public License for more details. 00017 // 00018 // You should have received a copy of the GNU General Public License 00019 // along with this program; if not, write to the 00020 // Free Software Foundation, Inc., 00021 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00022 00026 #ifndef IH_SENF_Scheduler_SignalEvent_ 00027 #define IH_SENF_Scheduler_SignalEvent_ 1 00028 00029 // Custom includes 00030 #include "FdManager.hh" 00031 #include <senf/boost_intrusive/iset.hpp> 00032 #include <senf/Utils/Exception.hh> 00033 #include <senf/Utils/singleton.hh> 00034 00035 //-///////////////////////////////////////////////////////////////////////////////////////////////// 00036 00037 namespace senf { 00038 namespace scheduler { 00039 00040 void restart(); 00041 00042 namespace detail { 00043 00044 struct SignalSetCompare { 00045 bool operator()(SignalEvent const & a, SignalEvent const & b) const 00046 { return a.signal_ < b.signal_; } 00047 }; 00048 00049 struct FindNumericSignal { 00050 bool operator()(SignalEvent const & a, int b) const 00051 { return a.signal_ < b; } 00052 bool operator()(int a, SignalEvent const & b) const 00053 { return a < b.signal_; } 00054 }; 00055 00056 class SignalDispatcher 00057 : public detail::FdManager::Event, 00058 public singleton<SignalDispatcher> 00059 { 00060 typedef boost::intrusive::iset< SignalSetBase::value_traits<SignalEvent>, 00061 SignalSetCompare, 00062 false > SignalSet; 00063 public: 00064 using singleton<SignalDispatcher>::instance; 00065 using singleton<SignalDispatcher>::alive; 00066 00067 void add(SignalEvent & event); 00068 void remove(SignalEvent & event); 00069 00070 void unblockSignals(); 00071 void blockSignals(); 00072 00073 bool empty() const; 00074 00075 struct DuplicateSignalRegistrationException : public Exception 00076 { DuplicateSignalRegistrationException() 00077 : Exception("duplicate signal registration") {} }; 00078 00079 protected: 00080 00081 private: 00082 SignalDispatcher(); 00083 ~SignalDispatcher(); 00084 00085 virtual void signal(int events); 00086 static void sigHandler(int signal, ::siginfo_t * siginfo, void *); 00087 00088 SignalSet handlers_; 00089 00090 int sigPipe_[2]; 00091 00092 bool blocked_; 00093 sigset_t sigSet_; 00094 00095 friend void senf::scheduler::restart(); 00096 friend class senf::scheduler::SignalEvent; 00097 friend class singleton<SignalDispatcher>; 00098 }; 00099 00100 }}} 00101 00102 //-///////////////////////////////////////////////////////////////////////////////////////////////// 00103 #endif 00104 00105 00106 // Local Variables: 00107 // mode: c++ 00108 // fill-column: 100 00109 // comment-column: 40 00110 // c-file-style: "senf" 00111 // indent-tabs-mode: nil 00112 // ispell-local-dictionary: "american" 00113 // compile-command: "scons -u test" 00114 // End: