4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief Target internal header */
31 #include <boost/scoped_ptr.hpp>
32 #include <boost/type_traits/is_same.hpp>
33 #include <boost/static_assert.hpp>
35 ///////////////////////////////ih.p////////////////////////////////////////
41 /** \brief Internal: Target registry */
43 : public senf::singleton<TargetRegistry>
46 using senf::singleton<TargetRegistry>::instance;
48 void write(StreamBase const & stream, AreaBase const & area, unsigned level,
51 void timeSource(std::auto_ptr<TimeSource> source);
54 bool fallbackRouting();
59 void registerTarget(Target * target);
60 void unregisterTarget(Target * target);
62 typedef std::set<Target *> Targets;
64 boost::scoped_ptr<TimeSource> timeSource_;
66 bool fallbackRouting_;
68 friend class senf::log::Target;
69 friend class senf::singleton<TargetRegistry>;
72 /** \brief Internal: Write log message */
73 template <class Stream, class Area, class Level>
74 void write(std::string msg);
78 // This code takes the routing target template arguments in any order and sorts them
79 // by type (Stream, Area and Level).
81 senf::mpl::rv<0u> RouteParameterCheck_(...);
82 senf::mpl::rv<1u> RouteParameterCheck_(StreamBase *);
83 senf::mpl::rv<2u> RouteParameterCheck_(AreaBase *);
84 template <class T> senf::mpl::rv<3u> RouteParameterCheck_(T*, typename T::SENFLogArea * = 0);
85 senf::mpl::rv<4u> RouteParameterCheck_(LevelBase *);
87 // For g++ 4.0 (at least) we need to provide the fully scoped name for this default value.
88 // no idea why. It works without the scope in 4.1
89 template < class T, class A2, class A1,
90 unsigned type = SENF_MPL_RV( senf::log::detail::RouteParameterCheck_(static_cast<T*>(0)) ) >
91 struct RouteParameters
94 template <class A2, class A1>
95 struct RouteParameters<mpl::nil,A2,A1,0u>
96 : public RouteParameters<A2,A1,mpl::nil>
100 static unsigned const value = NONE::value;
104 struct RouteParameters<mpl::nil,mpl::nil,mpl::nil,0u>
106 typedef mpl::nil Stream;
107 typedef mpl::nil Area;
108 typedef NilLevel Level;
111 template <class T, class A2, class A1>
112 struct RouteParameters<T,A2,A1,1u>
113 : public RouteParameters<A2,A1,mpl::nil>
115 typedef RouteParameters<A2,A1,mpl::nil> base;
116 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Stream, mpl::nil>::value ));
120 template <class T, class A2, class A1>
121 struct RouteParameters<T,A2,A1,2u>
122 : public RouteParameters<A2,A1,mpl::nil>
124 typedef RouteParameters<A2,A1,mpl::nil> base;
125 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Area, mpl::nil>::value ));
129 template <class T, class A2, class A1>
130 struct RouteParameters<T,A2,A1,3u>
131 : public RouteParameters<A2,A1,mpl::nil>
133 typedef RouteParameters<A2,A1,mpl::nil> base;
134 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Area, mpl::nil>::value ));
135 typedef typename T::SENFLogArea Area;
138 template <class T, class A2, class A1>
139 struct RouteParameters<T,A2,A1,4u>
140 : public RouteParameters<A2,A1,mpl::nil>
142 typedef RouteParameters<A2,A1,mpl::nil> base;
143 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Level, NilLevel>::value ));
147 template <class T, class RV>
150 static RV * value() { return & T::instance(); }
154 struct InstanceP<mpl::nil, RV>
156 static RV * value() { return 0; }
163 ///////////////////////////////ih.e////////////////////////////////////////
170 // comment-column: 40
171 // c-file-style: "senf"
172 // indent-tabs-mode: nil
173 // ispell-local-dictionary: "american"
174 // compile-command: "scons -u test"