new lua scripting for scene loading
[chaz/yoink] / src / Moof / Dispatcher.cc
1
2 /*******************************************************************************
3
4 Copyright (c) 2009, Charles McGarvey
5 All rights reserved.
6
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
9
10 * Redistributions of source code must retain the above copyright notice,
11 this list of conditions and the following disclaimer.
12 * Redistributions in binary form must reproduce the above copyright notice,
13 this list of conditions and the following disclaimer in the documentation
14 and/or other materials provided with the distribution.
15
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
20 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27 *******************************************************************************/
28
29 #include <map>
30
31 #include "Dispatcher.hh"
32
33
34 namespace Mf {
35
36
37 struct Dispatcher::Impl
38 {
39 Impl() :
40 id(1) {}
41
42 Dispatcher::Handler getNewHandler()
43 {
44 id += 2;
45 return (Dispatcher::Handler)id;
46 }
47
48 typedef std::pair<Dispatcher::Handler,Dispatcher::Function> Callback;
49 typedef std::multimap<std::string,Callback> CallbackLookup;
50 typedef CallbackLookup::iterator CallbackIter;
51
52 typedef std::multimap<Dispatcher::Handler,std::string> HandlerLookup;
53 typedef HandlerLookup::iterator HandlerIter;
54
55
56 inline Handler addHandler(const std::string& message,
57 const Function& callback, Handler id)
58 {
59 callbacks.insert(std::make_pair(message, std::make_pair(id, callback)));
60 handlers.insert(std::make_pair(id, message));
61
62 return id;
63 }
64
65 inline void removeHandler(Handler id)
66 {
67 std::pair<HandlerIter,HandlerIter> matching(handlers.equal_range(id));
68
69 for (HandlerIter it = matching.first; it != matching.second; ++it)
70 {
71 CallbackIter first = callbacks.find((*it).second);
72 CallbackIter last = callbacks.end();
73
74 for (CallbackIter jt = first; jt != last; ++jt)
75 {
76 if ((*jt).second.first == id)
77 {
78 callbacks.erase(jt);
79 break;
80 }
81 }
82 }
83
84 handlers.erase(id);
85 }
86
87 unsigned long id;
88
89 CallbackLookup callbacks;
90 HandlerLookup handlers;
91 };
92
93
94 Dispatcher::Dispatcher() :
95 impl_(new Dispatcher::Impl) {}
96
97 Dispatcher::~Dispatcher() {}
98
99
100 Dispatcher& Dispatcher::getInstance()
101 {
102 static Dispatcher dispatcher;
103 return dispatcher;
104 }
105
106
107 Dispatcher::Handler Dispatcher::addHandler(const std::string& message,
108 const Function& callback)
109 {
110 return addHandler(message, callback, impl_->getNewHandler());
111 }
112
113 Dispatcher::Handler Dispatcher::addHandler(const std::string& message,
114 const Function& callback, Handler id)
115 {
116 // pass through
117 return impl_->addHandler(message, callback, id);
118 }
119
120
121 void Dispatcher::removeHandler(Handler id)
122 {
123 // pass through
124 return impl_->removeHandler(id);
125 }
126
127
128 void Dispatcher::dispatch(const std::string& message, const Notification* param)
129 {
130 std::pair<Impl::CallbackIter,Impl::CallbackIter>
131 callbacks(impl_->callbacks.equal_range(message));
132
133 for (Impl::CallbackIter it = callbacks.first; it != callbacks.second; ++it)
134 {
135 Function callback = (*it).second.second;
136 callback(param);
137 }
138 }
139
140
141 } // namespace Mf
142
143 /** vim: set ts=4 sw=4 tw=80: *************************************************/
144
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