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108 lines
3.5 KiB
108 lines
3.5 KiB
// Copyright (C) 2007 Douglas Gregor |
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// Use, modification and distribution is subject to the Boost Software |
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// This file contains a simplification of the "trigger" method for |
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// process groups. The simple trigger handles the common case where |
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// the handler associated with a trigger is a member function bound to |
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// a particular pointer. |
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#ifndef BOOST_GRAPH_PARALLEL_SIMPLE_TRIGGER_HPP |
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#define BOOST_GRAPH_PARALLEL_SIMPLE_TRIGGER_HPP |
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#ifndef BOOST_GRAPH_USE_MPI |
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#error "Parallel BGL files should not be included unless <boost/graph/use_mpi.hpp> has been included" |
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#endif |
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#include <boost/graph/parallel/process_group.hpp> |
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namespace boost { namespace graph { namespace parallel { |
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namespace detail { |
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/** |
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* INTERNAL ONLY |
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* |
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* The actual function object that bridges from the normal trigger |
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* interface to the simplified interface. This is the equivalent of |
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* bind(pmf, self, _1, _2, _3, _4), but without the compile-time |
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* overhead of bind. |
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*/ |
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template<typename Class, typename T, typename Result> |
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class simple_trigger_t |
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{ |
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public: |
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simple_trigger_t(Class* self, |
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Result (Class::*pmf)(int, int, const T&, |
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trigger_receive_context)) |
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: self(self), pmf(pmf) { } |
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Result |
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operator()(int source, int tag, const T& data, |
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trigger_receive_context context) const |
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{ |
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return (self->*pmf)(source, tag, data, context); |
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} |
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private: |
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Class* self; |
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Result (Class::*pmf)(int, int, const T&, trigger_receive_context); |
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}; |
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} // end namespace detail |
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/** |
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* Simplified trigger interface that reduces the amount of code |
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* required to connect a process group trigger to a handler that is |
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* just a bound member function. |
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* |
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* INTERNAL ONLY |
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*/ |
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template<typename ProcessGroup, typename Class, typename T> |
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inline void |
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simple_trigger(ProcessGroup& pg, int tag, Class* self, |
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void (Class::*pmf)(int source, int tag, const T& data, |
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trigger_receive_context context), int) |
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{ |
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pg.template trigger<T>(tag, |
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detail::simple_trigger_t<Class, T, void>(self, pmf)); |
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} |
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/** |
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* Simplified trigger interface that reduces the amount of code |
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* required to connect a process group trigger with a reply to a |
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* handler that is just a bound member function. |
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* |
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* INTERNAL ONLY |
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*/ |
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template<typename ProcessGroup, typename Class, typename T, typename Result> |
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inline void |
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simple_trigger(ProcessGroup& pg, int tag, Class* self, |
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Result (Class::*pmf)(int source, int tag, const T& data, |
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trigger_receive_context context), long) |
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{ |
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pg.template trigger_with_reply<T> |
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(tag, detail::simple_trigger_t<Class, T, Result>(self, pmf)); |
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} |
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/** |
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* Simplified trigger interface that reduces the amount of code |
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* required to connect a process group trigger to a handler that is |
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* just a bound member function. |
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*/ |
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template<typename ProcessGroup, typename Class, typename T, typename Result> |
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inline void |
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simple_trigger(ProcessGroup& pg, int tag, Class* self, |
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Result (Class::*pmf)(int source, int tag, const T& data, |
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trigger_receive_context context)) |
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{ |
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// We pass 0 (an int) to help VC++ disambiguate calls to simple_trigger |
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// with Result=void. |
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simple_trigger(pg, tag, self, pmf, 0); |
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} |
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} } } // end namespace boost::graph::parallel |
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#endif // BOOST_GRAPH_PARALLEL_SIMPLE_TRIGGER_HPP
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