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1 | // Copyright (C) 2007 Douglas Gregor |
2 | ||
3 | // Use, modification and distribution is subject to the Boost Software | |
4 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt) | |
6 | ||
7 | // This file contains a simplification of the "trigger" method for | |
8 | // process groups. The simple trigger handles the common case where | |
9 | // the handler associated with a trigger is a member function bound to | |
10 | // a particular pointer. | |
11 | ||
12 | #ifndef BOOST_PROPERTY_MAP_PARALLEL_SIMPLE_TRIGGER_HPP | |
13 | #define BOOST_PROPERTY_MAP_PARALLEL_SIMPLE_TRIGGER_HPP | |
14 | ||
15 | #include <boost/property_map/parallel/process_group.hpp> | |
16 | ||
17 | namespace boost { namespace parallel { | |
18 | ||
19 | namespace detail { | |
20 | ||
21 | /** | |
22 | * INTERNAL ONLY | |
23 | * | |
24 | * The actual function object that bridges from the normal trigger | |
25 | * interface to the simplified interface. This is the equivalent of | |
26 | * bind(pmf, self, _1, _2, _3, _4), but without the compile-time | |
27 | * overhead of bind. | |
28 | */ | |
29 | template<typename Class, typename T, typename Result> | |
30 | class simple_trigger_t | |
31 | { | |
32 | public: | |
33 | simple_trigger_t(Class* self, | |
34 | Result (Class::*pmf)(int, int, const T&, | |
35 | trigger_receive_context)) | |
36 | : self(self), pmf(pmf) { } | |
37 | ||
38 | Result | |
39 | operator()(int source, int tag, const T& data, | |
40 | trigger_receive_context context) const | |
41 | { | |
42 | return (self->*pmf)(source, tag, data, context); | |
43 | } | |
44 | ||
45 | private: | |
46 | Class* self; | |
47 | Result (Class::*pmf)(int, int, const T&, trigger_receive_context); | |
48 | }; | |
49 | ||
50 | } // end namespace detail | |
51 | ||
52 | /** | |
53 | * Simplified trigger interface that reduces the amount of code | |
54 | * required to connect a process group trigger to a handler that is | |
55 | * just a bound member function. | |
56 | * | |
57 | * INTERNAL ONLY | |
58 | */ | |
59 | template<typename ProcessGroup, typename Class, typename T> | |
60 | inline void | |
61 | simple_trigger(ProcessGroup& pg, int tag, Class* self, | |
62 | void (Class::*pmf)(int source, int tag, const T& data, | |
63 | trigger_receive_context context), int) | |
64 | { | |
65 | pg.template trigger<T>(tag, | |
66 | detail::simple_trigger_t<Class, T, void>(self, pmf)); | |
67 | } | |
68 | ||
69 | /** | |
70 | * Simplified trigger interface that reduces the amount of code | |
71 | * required to connect a process group trigger with a reply to a | |
72 | * handler that is just a bound member function. | |
73 | * | |
74 | * INTERNAL ONLY | |
75 | */ | |
76 | template<typename ProcessGroup, typename Class, typename T, typename Result> | |
77 | inline void | |
78 | simple_trigger(ProcessGroup& pg, int tag, Class* self, | |
79 | Result (Class::*pmf)(int source, int tag, const T& data, | |
80 | trigger_receive_context context), long) | |
81 | { | |
82 | pg.template trigger_with_reply<T> | |
83 | (tag, detail::simple_trigger_t<Class, T, Result>(self, pmf)); | |
84 | } | |
85 | ||
86 | /** | |
87 | * Simplified trigger interface that reduces the amount of code | |
88 | * required to connect a process group trigger to a handler that is | |
89 | * just a bound member function. | |
90 | */ | |
91 | template<typename ProcessGroup, typename Class, typename T, typename Result> | |
92 | inline void | |
93 | simple_trigger(ProcessGroup& pg, int tag, Class* self, | |
94 | Result (Class::*pmf)(int source, int tag, const T& data, | |
95 | trigger_receive_context context)) | |
96 | { | |
97 | // We pass 0 (an int) to help VC++ disambiguate calls to simple_trigger | |
98 | // with Result=void. | |
99 | simple_trigger(pg, tag, self, pmf, 0); | |
100 | } | |
101 | ||
102 | } } // end namespace boost::parallel | |
103 | ||
104 | namespace boost { namespace graph { namespace parallel { using boost::parallel::simple_trigger; } } } | |
105 | ||
106 | #endif // BOOST_PROPERTY_MAP_PARALLEL_SIMPLE_TRIGGER_HPP |