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Alexander Afanasyev30cb1172012-07-06 10:47:39 -07001/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
2/*
3 * Copyright (c) 2012 University of California, Los Angeles
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation;
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
19 */
20
21#ifndef MULTI_POLICY_H_
22#define MULTI_POLICY_H_
23
24#include "detail/multi-type-container.h"
25#include "detail/multi-policy-container.h"
26#include "detail/functor-hook.h"
27
28#include <boost/mpl/size.hpp>
29#include <boost/mpl/at.hpp>
30#include <boost/mpl/range_c.hpp>
31#include <boost/mpl/transform.hpp>
32#include <boost/mpl/back_inserter.hpp>
33#include <boost/mpl/vector.hpp>
Alexander Afanasyev8566f452012-12-10 15:21:51 -080034#include <boost/mpl/for_each.hpp>
Alexander Afanasyev30cb1172012-07-06 10:47:39 -070035
36#include <boost/intrusive/options.hpp>
37
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070038namespace ns3 {
39namespace ndn {
40namespace ndnSIM {
Alexander Afanasyev30cb1172012-07-06 10:47:39 -070041
42template<typename Policies> // e.g., mpl::vector1< lru_policy_traits >
43struct multi_policy_traits
44{
45 typedef Policies policy_traits;
46
47 struct getHook { template<class Item> struct apply { typedef typename Item::policy_hook_type type; }; };
48 typedef detail::multi_type_container< typename boost::mpl::transform1<policy_traits, getHook>::type > policy_hook_type;
49
50 template<class Container>
51 struct container_hook
52 {
53 typedef policy_hook_type type;
54 };
55
56 template<class Base,
57 class Container,
58 class Hook>
59 struct policy
60 {
61 typedef boost::mpl::range_c<int, 0, boost::mpl::size<policy_traits>::type::value> policies_range;
62
63 struct getPolicy
64 {
65 template<class Number>
66 struct apply
67 {
68 typedef
69 typename boost::mpl::at_c<policy_traits, Number::value>::type::
70 template policy<Base,
71 Container,
72 boost::intrusive::function_hook< detail::FunctorHook <Hook,
73 Container,
74 Number::value> > >::type
75 type;
76 };
77 };
78
79 typedef
80 typename boost::mpl::transform1<policies_range,
81 getPolicy,
82 boost::mpl::back_inserter< boost::mpl::vector0<> > >::type policies;
83
84
85 typedef detail::multi_policy_container< Base, policies > policy_container;
86
87 class type : public policy_container
88 {
89 public:
Alexander Afanasyev69786112012-12-13 11:53:36 -080090 typedef policy policy_base; // to get access to get_time methods from outside
Alexander Afanasyev30cb1172012-07-06 10:47:39 -070091 typedef Container parent_trie;
92
93 type (Base &base)
94 : policy_container (base)
95 {
96 }
97
98 inline void
99 update (typename parent_trie::iterator item)
100 {
101 policy_container::update (item);
102 }
103
104 inline bool
105 insert (typename parent_trie::iterator item)
106 {
107 return policy_container::insert (item);
108 }
109
110 inline void
111 lookup (typename parent_trie::iterator item)
112 {
113 policy_container::lookup (item);
114 }
115
116 inline void
117 erase (typename parent_trie::iterator item)
118 {
119 policy_container::erase (item);
120 }
Alexander Afanasyev78057c32012-07-06 15:18:46 -0700121
122 inline void
123 clear ()
124 {
125 policy_container::clear ();
126 }
Alexander Afanasyev8566f452012-12-10 15:21:51 -0800127
128 struct max_size_setter
129 {
130 max_size_setter (policy_container &container, size_t size) : m_container (container), m_size (size) { }
131
132 template< typename U > void operator() (U index)
133 {
134 m_container.template get<U::value> ().set_max_size (m_size);
135 }
136
137 private:
138 policy_container &m_container;
139 size_t m_size;
140 };
141
142 inline void
143 set_max_size (size_t max_size)
144 {
145 boost::mpl::for_each< boost::mpl::range_c<int, 0, boost::mpl::size<policy_traits>::type::value> >
146 (max_size_setter (*this, max_size));
147 }
148
149 inline size_t
150 get_max_size () const
151 {
152 // as max size should be the same everywhere, get the value from the first available policy
153 return policy_container::template get<0> ().get_max_size ();
154 }
155
Alexander Afanasyev30cb1172012-07-06 10:47:39 -0700156 };
157 };
Alexander Afanasyev8566f452012-12-10 15:21:51 -0800158
159
160 struct name_getter
161 {
162 name_getter (std::string &name) : m_name (name) { }
163
164 template< typename U > void operator() (U index)
165 {
166 m_name += boost::mpl::at_c< policy_traits, U::value >::type::GetName ();
167 }
168
169 std::string &m_name;
170 };
171
172 /// @brief Name that can be used to identify the policy (for NS-3 object model and logging)
173 static std::string GetName ()
174 {
175 // combine names of all internal policies
176 std::string name;
177 boost::mpl::for_each< boost::mpl::range_c<int, 0, boost::mpl::size<policy_traits>::type::value> > (name_getter (name));
178
179 return name;
180 }
Alexander Afanasyev30cb1172012-07-06 10:47:39 -0700181};
182
183} // ndnSIM
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700184} // ndn
Alexander Afanasyeve77db792012-08-09 11:10:58 -0700185} // ns3
Alexander Afanasyev30cb1172012-07-06 10:47:39 -0700186
187#endif // MULTI_POLICY_H_