Chris@102: // Copyright (C) 2007 Douglas Gregor 
Chris@102: 
Chris@102: // Use, modification and distribution is subject to the Boost Software
Chris@102: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@102: // http://www.boost.org/LICENSE_1_0.txt)
Chris@102: 
Chris@102: // This file contains a simplification of the "trigger" method for
Chris@102: // process groups. The simple trigger handles the common case where
Chris@102: // the handler associated with a trigger is a member function bound to
Chris@102: // a particular pointer.
Chris@102: 
Chris@102: #ifndef BOOST_PROPERTY_MAP_PARALLEL_SIMPLE_TRIGGER_HPP
Chris@102: #define BOOST_PROPERTY_MAP_PARALLEL_SIMPLE_TRIGGER_HPP
Chris@102: 
Chris@102: #include <boost/property_map/parallel/process_group.hpp>
Chris@102: 
Chris@102: namespace boost { namespace parallel {
Chris@102: 
Chris@102: namespace detail {
Chris@102: 
Chris@102: /**
Chris@102:  * INTERNAL ONLY
Chris@102:  *
Chris@102:  * The actual function object that bridges from the normal trigger
Chris@102:  * interface to the simplified interface. This is the equivalent of
Chris@102:  * bind(pmf, self, _1, _2, _3, _4), but without the compile-time
Chris@102:  * overhead of bind.
Chris@102:  */
Chris@102: template<typename Class, typename T, typename Result>
Chris@102: class simple_trigger_t 
Chris@102: {
Chris@102: public:
Chris@102:   simple_trigger_t(Class* self, 
Chris@102:                    Result (Class::*pmf)(int, int, const T&, 
Chris@102:                                         trigger_receive_context))
Chris@102:     : self(self), pmf(pmf) { }
Chris@102: 
Chris@102:   Result 
Chris@102:   operator()(int source, int tag, const T& data, 
Chris@102:              trigger_receive_context context) const
Chris@102:   {
Chris@102:     return (self->*pmf)(source, tag, data, context);
Chris@102:   }
Chris@102: 
Chris@102: private:
Chris@102:   Class* self;
Chris@102:   Result (Class::*pmf)(int, int, const T&, trigger_receive_context);
Chris@102: };
Chris@102: 
Chris@102: } // end namespace detail
Chris@102: 
Chris@102: /**
Chris@102:  * Simplified trigger interface that reduces the amount of code
Chris@102:  * required to connect a process group trigger to a handler that is
Chris@102:  * just a bound member function.
Chris@102:  *
Chris@102:  * INTERNAL ONLY
Chris@102:  */
Chris@102: template<typename ProcessGroup, typename Class, typename T>
Chris@102: inline void 
Chris@102: simple_trigger(ProcessGroup& pg, int tag, Class* self, 
Chris@102:                void (Class::*pmf)(int source, int tag, const T& data, 
Chris@102:                                   trigger_receive_context context), int)
Chris@102: {
Chris@102:   pg.template trigger<T>(tag, 
Chris@102:                          detail::simple_trigger_t<Class, T, void>(self, pmf));
Chris@102: }
Chris@102: 
Chris@102: /**
Chris@102:  * Simplified trigger interface that reduces the amount of code
Chris@102:  * required to connect a process group trigger with a reply to a
Chris@102:  * handler that is just a bound member function.
Chris@102:  *
Chris@102:  * INTERNAL ONLY
Chris@102:  */
Chris@102: template<typename ProcessGroup, typename Class, typename T, typename Result>
Chris@102: inline void 
Chris@102: simple_trigger(ProcessGroup& pg, int tag, Class* self, 
Chris@102:                Result (Class::*pmf)(int source, int tag, const T& data, 
Chris@102:                                     trigger_receive_context context), long)
Chris@102: {
Chris@102:   pg.template trigger_with_reply<T>
Chris@102:     (tag, detail::simple_trigger_t<Class, T, Result>(self, pmf));
Chris@102: }
Chris@102: 
Chris@102: /**
Chris@102:  * Simplified trigger interface that reduces the amount of code
Chris@102:  * required to connect a process group trigger to a handler that is
Chris@102:  * just a bound member function.
Chris@102:  */
Chris@102: template<typename ProcessGroup, typename Class, typename T, typename Result>
Chris@102: inline void 
Chris@102: simple_trigger(ProcessGroup& pg, int tag, Class* self, 
Chris@102:                Result (Class::*pmf)(int source, int tag, const T& data, 
Chris@102:                                     trigger_receive_context context))
Chris@102: {
Chris@102:         // We pass 0 (an int) to help VC++ disambiguate calls to simple_trigger 
Chris@102:         // with Result=void.
Chris@102:         simple_trigger(pg, tag, self, pmf, 0); 
Chris@102: }
Chris@102: 
Chris@102: } } // end namespace boost::parallel
Chris@102: 
Chris@102: namespace boost { namespace graph { namespace parallel { using boost::parallel::simple_trigger; } } }
Chris@102: 
Chris@102: #endif // BOOST_PROPERTY_MAP_PARALLEL_SIMPLE_TRIGGER_HPP