4 // Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
5 // Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
6 // Stefan Bund <stefan.bund@fokus.fraunhofer.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 Policy Framework internal header
27 #ifndef IH_SocketPolicy_
28 #define IH_SocketPolicy_ 1
31 #include <boost/preprocessor/seq/for_each.hpp>
32 #include <boost/preprocessor/seq/for_each_i.hpp>
33 #include <boost/preprocessor/seq/size.hpp>
34 #include <boost/preprocessor/seq/pop_front.hpp>
35 #include <boost/preprocessor/punctuation/comma_if.hpp>
36 #include <boost/preprocessor/repetition/enum_params.hpp>
37 #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
38 #include <boost/preprocessor/repetition/enum_shifted_params.hpp>
39 #include <boost/preprocessor/cat.hpp>
40 #include <boost/preprocessor/seq/elem.hpp>
41 #include <boost/preprocessor/arithmetic/dec.hpp>
42 #include <boost/preprocessor/iteration/local.hpp>
43 #include <boost/preprocessor/control/if.hpp>
44 #include <boost/preprocessor/comparison/equal.hpp>
46 #include <boost/type_traits.hpp>
47 #include <boost/mpl/vector.hpp>
48 #include <boost/mpl/fold.hpp>
49 #include <boost/mpl/if.hpp>
50 #include <boost/mpl/and.hpp>
51 #include <boost/utility.hpp> // for enable_if
53 ///////////////////////////////ih.p////////////////////////////////////////
56 // Hide this code from doxygen
60 # define SENF_SOCKET_POLICIES_N BOOST_PP_SEQ_SIZE( SENF_SOCKET_POLICIES )
62 # define SP_DeclareAlias(x1,x2,SomePolicy) \
63 typedef BOOST_PP_CAT(SomePolicy,Base) BOOST_PP_CAT(Unspecified,SomePolicy);
65 BOOST_PP_SEQ_FOR_EACH( SP_DeclareAlias, , SENF_SOCKET_POLICIES )
67 # undef SP_DeclareAlias
69 struct SocketPolicyBase
71 virtual ~SocketPolicyBase() {}
73 # define SP_Declare(x1,x2,SomePolicy) \
74 virtual BOOST_PP_CAT(SomePolicy,Base) const & BOOST_PP_CAT(the,SomePolicy) () const = 0;
76 BOOST_PP_SEQ_FOR_EACH( SP_Declare, , SENF_SOCKET_POLICIES )
81 # define SP_TemplateArgs(x1,x2,n,SomePolicy) \
82 BOOST_PP_COMMA_IF( n ) \
83 class BOOST_PP_CAT(SomePolicy,_) = BOOST_PP_CAT(SomePolicy,Base)
85 template < BOOST_PP_SEQ_FOR_EACH_I( SP_TemplateArgs, , SENF_SOCKET_POLICIES ) >
87 : public SocketPolicyBase
89 # define SP_DeclarePolicyMember(x1,x2,SomePolicy) \
90 typedef BOOST_PP_CAT(SomePolicy,_) SomePolicy; \
91 SomePolicy BOOST_PP_CAT(BOOST_PP_CAT(the,SomePolicy),_); \
92 BOOST_PP_CAT(SomePolicy,Base) const & BOOST_PP_CAT(the,SomePolicy) () const \
93 { return BOOST_PP_CAT(BOOST_PP_CAT(the,SomePolicy),_); }
95 BOOST_PP_SEQ_FOR_EACH( SP_DeclarePolicyMember, , SENF_SOCKET_POLICIES )
96 # undef SP_DeclarePolicyMember
98 static void checkBaseOf(SocketPolicyBase const & other);
101 # undef SP_TemplateArgs
108 struct SocketPolicy_rv
111 template <class Base, class Policy, int N>
112 struct MakeSocketPolicy_merge
115 # define SP_DeclareMakeSocketPolicy_merge_member(r,n,m,SomePolicy) \
116 BOOST_PP_COMMA_IF( m ) \
117 BOOST_PP_IIF( BOOST_PP_EQUAL(n,m), Policy, typename Base::SomePolicy )
119 # define BOOST_PP_LOCAL_LIMITS (0, BOOST_PP_DEC( SENF_SOCKET_POLICIES_N ) )
120 # define BOOST_PP_LOCAL_MACRO(n) \
121 SocketPolicy_rv<n> MakeSocketPolicy_merge_(BOOST_PP_CAT( BOOST_PP_SEQ_ELEM( n, SENF_SOCKET_POLICIES ),Base)*); \
123 template <class Base, class Policy> \
124 struct MakeSocketPolicy_merge<Base,Policy,sizeof(SocketPolicy_rv<n>)> \
126 typedef SocketPolicy< \
127 BOOST_PP_SEQ_FOR_EACH_I( SP_DeclareMakeSocketPolicy_merge_member, n, SENF_SOCKET_POLICIES ) \
131 # include BOOST_PP_LOCAL_ITERATE()
133 # undef SP_DeclareMakeSocketPolicy_merge_member
135 struct MakeSocketPolicy_fold
137 template <class Base, class Policy>
139 : MakeSocketPolicy_merge<Base,
141 sizeof(MakeSocketPolicy_merge_(static_cast<Policy*>(0)))>
144 template <class Base>
145 struct apply<Base,nil>
151 template <class Base, class Vector>
152 struct MakeSocketPolicy_impl
154 typedef typename boost::mpl::fold< Vector, Base, MakeSocketPolicy_fold >::type policy;
157 # define SP_DeclareArguments(x1,x2,n,SomePolicy) \
158 BOOST_PP_COMMA_IF( n ) \
159 typename Base::SomePolicy *
161 template <class Base>
162 SocketPolicy_rv<1> SocketPolicy_checkcompat_(
163 BOOST_PP_SEQ_FOR_EACH_I( SP_DeclareArguments, , SENF_SOCKET_POLICIES ) );
165 # undef SP_DeclareArguments
167 template <class Base>
168 SocketPolicy_rv<2> SocketPolicy_checkcompat_( ... );
171 struct SocketPolicy_checkcompat
172 : public boost::false_type
176 struct SocketPolicy_checkcompat<sizeof(SocketPolicy_rv<1>)>
177 : public boost::true_type
181 # define SP_DeclareArguments(x1,x2,n,SomePolicy) \
182 BOOST_PP_COMMA_IF( n ) \
183 static_cast<typename Derived::SomePolicy *>(0)
185 template <class Base, class Derived>
186 struct SocketPolicy_compatibility
187 : public SocketPolicy_checkcompat< sizeof(
188 SocketPolicy_checkcompat_<Base>(
189 BOOST_PP_SEQ_FOR_EACH_I( SP_DeclareArguments, , SENF_SOCKET_POLICIES ) )) >
194 template < BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT( SENF_SOCKET_POLICIES_N, class T, senf::impl::nil ) >
195 class MakeSocketPolicy
196 : public boost::mpl::if_< boost::is_convertible< T0*, SocketPolicyBase* >,
197 impl::MakeSocketPolicy_impl< T0, boost::mpl::vector< BOOST_PP_ENUM_SHIFTED_PARAMS( SENF_SOCKET_POLICIES_N, T ) > >,
198 impl::MakeSocketPolicy_impl< SocketPolicy<>,
199 boost::mpl::vector< BOOST_PP_ENUM_PARAMS( SENF_SOCKET_POLICIES_N, T ) > > >::type
202 template <class BasePolicy, class DerivedPolicy>
203 struct SocketPolicyIsBaseOf
204 : public boost::mpl::if_< boost::mpl::and_< boost::is_convertible< BasePolicy*, SocketPolicyBase* >,
205 boost::is_convertible< DerivedPolicy*, SocketPolicyBase* > >,
206 impl::SocketPolicy_compatibility<BasePolicy,DerivedPolicy>,
207 boost::false_type >::type
210 # define SP_DefineConditions(x1,x2,SomePolicy) \
211 template <class Policy, class Trait> \
212 struct BOOST_PP_CAT(SomePolicy,Is) \
213 : public boost::is_convertible< typename Policy::SomePolicy*, Trait* > \
216 template <class Policy, class Trait> \
217 struct BOOST_PP_CAT(BOOST_PP_CAT(If,SomePolicy),Is) \
218 : public boost::enable_if< BOOST_PP_CAT(SomePolicy,Is)<Policy,Trait> > \
221 template <class Policy, class Trait> \
222 struct BOOST_PP_CAT(BOOST_PP_CAT(If,SomePolicy),IsNot) \
223 : public boost::enable_if_c< ! BOOST_PP_CAT(SomePolicy,Is)<Policy,Trait>::value > \
226 BOOST_PP_SEQ_FOR_EACH( SP_DefineConditions, , SENF_SOCKET_POLICIES )
228 # undef SP_DefineConditions
234 ///////////////////////////////ih.e////////////////////////////////////////
241 // c-file-style: "senf"
242 // indent-tabs-mode: nil
243 // ispell-local-dictionary: "american"