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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/signals/signal_template.hpp
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+// Boost.Signals library
+
+// Copyright Douglas Gregor 2001-2004. Use, modification and
+// distribution is subject to the Boost Software License, Version
+// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// For more information, see http://www.boost.org
+
+// This file intentionally does not have include guards, because it is meant
+// to be included multiple times (one for each signalN class). The
+// BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED macro merely serves to
+// suppress reinclusion of the files that this header depends on.
+
+#ifndef BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED
+#define BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED
+# include <boost/config.hpp>
+# include <boost/signals/connection.hpp>
+# include <boost/utility.hpp>
+# include <boost/ref.hpp>
+# include <boost/signals/slot.hpp>
+# include <boost/last_value.hpp>
+# include <boost/signals/detail/signal_base.hpp>
+# include <boost/signals/detail/slot_call_iterator.hpp>
+# include <boost/mpl/bool.hpp>
+# include <boost/type_traits/is_convertible.hpp>
+# include <cassert>
+# include <functional>
+# include <memory>
+#endif // !BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+
+// Include the appropriate functionN header
+#define BOOST_SIGNAL_FUNCTION_N_HEADER BOOST_JOIN(<boost/function/function,BOOST_SIGNALS_NUM_ARGS.hpp>)
+#include BOOST_SIGNAL_FUNCTION_N_HEADER
+
+// Determine if a comma should follow a listing of the arguments/parameters
+#if BOOST_SIGNALS_NUM_ARGS == 0
+# define BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+#else
+# define BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS ,
+#endif // BOOST_SIGNALS_NUM_ARGS > 0
+
+// Define class names used
+#define BOOST_SIGNALS_SIGNAL BOOST_JOIN(signal,BOOST_SIGNALS_NUM_ARGS)
+#define BOOST_SIGNALS_FUNCTION BOOST_JOIN(function,BOOST_SIGNALS_NUM_ARGS)
+#define BOOST_SIGNALS_ARGS_STRUCT BOOST_JOIN(args,BOOST_SIGNALS_NUM_ARGS)
+#define BOOST_SIGNALS_CALL_BOUND BOOST_JOIN(call_bound,BOOST_SIGNALS_NUM_ARGS)
+
+// Define commonly-used instantiations
+#define BOOST_SIGNALS_ARGS_STRUCT_INST \
+ BOOST_SIGNALS_NAMESPACE::detail::BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>
+
+namespace boost {
+ namespace BOOST_SIGNALS_NAMESPACE {
+ namespace detail {
+ // Holds the arguments for a bound slot call in a single place
+ template<BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename Dummy = int>
+ struct BOOST_SIGNALS_ARGS_STRUCT {
+ BOOST_SIGNALS_ARGS_STRUCT(BOOST_SIGNALS_COPY_PARMS)
+ BOOST_SIGNALS_INIT_ARGS
+ {
+ }
+
+ BOOST_SIGNALS_ARGS_AS_MEMBERS
+ };
+
+ // Function object that calls the function object given to it, passing
+ // the bound arguments along to that underlying function object
+ template<typename R>
+ struct BOOST_SIGNALS_CALL_BOUND {
+ template<BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename F>
+ struct caller {
+ typedef BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>*
+ args_type;
+
+ args_type args;
+
+ typedef R result_type;
+
+ caller() {}
+ caller(args_type a) : args(a) {}
+
+ template<typename Pair>
+ R operator()(const Pair& slot) const
+ {
+ F* target = const_cast<F*>(unsafe_any_cast<F>(&slot.second));
+ return (*target)(BOOST_SIGNALS_BOUND_ARGS);
+ }
+ };
+ };
+
+ template<>
+ struct BOOST_SIGNALS_CALL_BOUND<void> {
+ template<BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename F>
+ struct caller {
+ typedef BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>*
+ args_type;
+
+ args_type args;
+
+ typedef unusable result_type;
+
+ caller(args_type a) : args(a) {}
+
+ template<typename Pair>
+ unusable operator()(const Pair& slot) const
+ {
+ F* target = const_cast<F*>(unsafe_any_cast<F>(&slot.second));
+ (*target)(BOOST_SIGNALS_BOUND_ARGS);
+ return unusable();
+ }
+ };
+ };
+ } // namespace detail
+ } // namespace BOOST_SIGNALS_NAMESPACE
+
+ // The actual signalN class
+ template<
+ typename R,
+ BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename Combiner = last_value<R>,
+ typename Group = int,
+ typename GroupCompare = std::less<Group>,
+ typename SlotFunction = BOOST_SIGNALS_FUNCTION<
+ R BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ BOOST_SIGNALS_TEMPLATE_ARGS>
+ >
+ class BOOST_SIGNALS_SIGNAL :
+ public BOOST_SIGNALS_NAMESPACE::detail::signal_base, // management of slot list
+ public BOOST_SIGNALS_NAMESPACE::trackable // signals are trackable
+ {
+ public:
+ // The slot function type
+ typedef SlotFunction slot_function_type;
+
+ // Result type of a slot
+ typedef typename BOOST_SIGNALS_NAMESPACE::detail::slot_result_type<R>::type
+ slot_result_type;
+
+ // Argument types
+ BOOST_SIGNALS_ARG_TYPES
+
+#if BOOST_SIGNALS_NUM_ARGS == 1
+ typedef T1 argument_type;
+#elif BOOST_SIGNALS_NUM_ARGS == 2
+ typedef T1 first_argument_type;
+ typedef T2 second_argument_type;
+#endif
+
+ private:
+ // The real slot name comparison object type
+ typedef BOOST_SIGNALS_NAMESPACE::detail::group_bridge_compare<GroupCompare, Group>
+ real_group_compare_type;
+
+ // The function object passed to the slot call iterator that will call
+ // the underlying slot function with its arguments bound
+ typedef BOOST_SIGNALS_NAMESPACE::detail::BOOST_SIGNALS_CALL_BOUND<R>
+ outer_bound_slot_caller;
+ typedef typename outer_bound_slot_caller::template
+ caller<BOOST_SIGNALS_TEMPLATE_ARGS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ slot_function_type>
+ call_bound_slot;
+
+ public:
+ // Combiner's result type
+ typedef typename Combiner::result_type result_type;
+
+ // Combiner type
+ typedef Combiner combiner_type;
+
+ // Slot type
+ typedef slot<slot_function_type> slot_type;
+
+ // Slot name type and comparison
+ typedef Group group_type;
+ typedef GroupCompare group_compare_type;
+
+ typedef BOOST_SIGNALS_NAMESPACE::detail::slot_call_iterator<
+ call_bound_slot, iterator> slot_call_iterator;
+
+ explicit
+ BOOST_SIGNALS_SIGNAL(const Combiner& c = Combiner(),
+ const GroupCompare& comp = GroupCompare()) :
+ BOOST_SIGNALS_NAMESPACE::detail::signal_base(real_group_compare_type(comp),
+ c)
+ {
+ }
+
+ // Connect a slot to this signal
+ BOOST_SIGNALS_NAMESPACE::connection
+ connect(const slot_type&,
+ BOOST_SIGNALS_NAMESPACE::connect_position at
+ = BOOST_SIGNALS_NAMESPACE::at_back);
+
+
+ BOOST_SIGNALS_NAMESPACE::connection
+ connect(const group_type&, const slot_type&,
+ BOOST_SIGNALS_NAMESPACE::connect_position at
+ = BOOST_SIGNALS_NAMESPACE::at_back);
+
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
+ // MSVC 6.0 and 7.0 don't handle the is_convertible test well
+ void disconnect(const group_type& group)
+ {
+ impl->disconnect(group);
+ }
+#else
+ template<typename T>
+ void disconnect(const T& t)
+ {
+ typedef mpl::bool_<(is_convertible<T, group_type>::value)> is_group;
+ this->do_disconnect(t, is_group());
+ }
+
+ private:
+ // Disconnect a named slot
+ void do_disconnect(const group_type& group, mpl::bool_<true>)
+ {
+ impl->disconnect(group);
+ }
+
+ template<typename Function>
+ void do_disconnect(const Function& f, mpl::bool_<false>)
+ {
+ // Notify the slot handling code that we are iterating through the slots
+ BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl);
+
+ for (iterator i = impl->slots_.begin(); i != impl->slots_.end(); ++i) {
+ slot_function_type& s = *unsafe_any_cast<slot_function_type>(&i->second);
+ if (s == f) i->first.disconnect();
+ }
+ }
+#endif
+
+ public:
+
+ // Emit the signal
+ result_type operator()(BOOST_SIGNALS_PARMS);
+ result_type operator()(BOOST_SIGNALS_PARMS) const;
+
+ Combiner& combiner()
+ { return *unsafe_any_cast<Combiner>(&impl->combiner_); }
+
+ const Combiner& combiner() const
+ { return *unsafe_any_cast<const Combiner>(&impl->combiner_); }
+ };
+
+ template<
+ typename R,
+ BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename Combiner,
+ typename Group,
+ typename GroupCompare,
+ typename SlotFunction
+ >
+ BOOST_SIGNALS_NAMESPACE::connection
+ BOOST_SIGNALS_SIGNAL<
+ R, BOOST_SIGNALS_TEMPLATE_ARGS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ Combiner, Group, GroupCompare, SlotFunction
+ >::connect(const slot_type& in_slot,
+ BOOST_SIGNALS_NAMESPACE::connect_position at)
+ {
+ using boost::BOOST_SIGNALS_NAMESPACE::detail::stored_group;
+
+ // If the slot has been disconnected, just return a disconnected
+ // connection
+ if (!in_slot.is_active()) {
+ return BOOST_SIGNALS_NAMESPACE::connection();
+ }
+
+ return impl->connect_slot(in_slot.get_slot_function(), stored_group(),
+ in_slot.get_data(), at);
+ }
+
+ template<
+ typename R,
+ BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename Combiner,
+ typename Group,
+ typename GroupCompare,
+ typename SlotFunction
+ >
+ BOOST_SIGNALS_NAMESPACE::connection
+ BOOST_SIGNALS_SIGNAL<
+ R, BOOST_SIGNALS_TEMPLATE_ARGS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ Combiner, Group, GroupCompare, SlotFunction
+ >::connect(const group_type& group,
+ const slot_type& in_slot,
+ BOOST_SIGNALS_NAMESPACE::connect_position at)
+ {
+ // If the slot has been disconnected, just return a disconnected
+ // connection
+ if (!in_slot.is_active()) {
+ return BOOST_SIGNALS_NAMESPACE::connection();
+ }
+
+ return impl->connect_slot(in_slot.get_slot_function(), group,
+ in_slot.get_data(), at);
+ }
+
+ template<
+ typename R,
+ BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename Combiner,
+ typename Group,
+ typename GroupCompare,
+ typename SlotFunction
+ >
+ typename BOOST_SIGNALS_SIGNAL<
+ R, BOOST_SIGNALS_TEMPLATE_ARGS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ Combiner, Group, GroupCompare, SlotFunction>::result_type
+ BOOST_SIGNALS_SIGNAL<
+ R, BOOST_SIGNALS_TEMPLATE_ARGS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ Combiner, Group, GroupCompare, SlotFunction
+ >::operator()(BOOST_SIGNALS_PARMS)
+ {
+ // Notify the slot handling code that we are making a call
+ BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl);
+
+ // Construct a function object that will call the underlying slots
+ // with the given arguments.
+#if BOOST_SIGNALS_NUM_ARGS == 0
+ BOOST_SIGNALS_ARGS_STRUCT_INST args;
+#else
+ BOOST_SIGNALS_ARGS_STRUCT_INST args(BOOST_SIGNALS_ARGS);
+#endif // BOOST_SIGNALS_NUM_ARGS > 0
+ call_bound_slot f(&args);
+
+ typedef typename call_bound_slot::result_type result_type;
+ optional<result_type> cache;
+ // Let the combiner call the slots via a pair of input iterators
+ return combiner()(slot_call_iterator(notification.impl->slots_.begin(),
+ impl->slots_.end(), f, cache),
+ slot_call_iterator(notification.impl->slots_.end(),
+ impl->slots_.end(), f, cache));
+ }
+
+ template<
+ typename R,
+ BOOST_SIGNALS_TEMPLATE_PARMS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ typename Combiner,
+ typename Group,
+ typename GroupCompare,
+ typename SlotFunction
+ >
+ typename BOOST_SIGNALS_SIGNAL<
+ R, BOOST_SIGNALS_TEMPLATE_ARGS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ Combiner, Group, GroupCompare, SlotFunction>::result_type
+ BOOST_SIGNALS_SIGNAL<
+ R, BOOST_SIGNALS_TEMPLATE_ARGS
+ BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+ Combiner, Group, GroupCompare, SlotFunction
+ >::operator()(BOOST_SIGNALS_PARMS) const
+ {
+ // Notify the slot handling code that we are making a call
+ BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl);
+
+ // Construct a function object that will call the underlying slots
+ // with the given arguments.
+#if BOOST_SIGNALS_NUM_ARGS == 0
+ BOOST_SIGNALS_ARGS_STRUCT_INST args;
+#else
+ BOOST_SIGNALS_ARGS_STRUCT_INST args(BOOST_SIGNALS_ARGS);
+#endif // BOOST_SIGNALS_NUM_ARGS > 0
+
+ call_bound_slot f(&args);
+
+ typedef typename call_bound_slot::result_type result_type;
+ optional<result_type> cache;
+
+ // Let the combiner call the slots via a pair of input iterators
+ return combiner()(slot_call_iterator(notification.impl->slots_.begin(),
+ impl->slots_.end(), f, cache),
+ slot_call_iterator(notification.impl->slots_.end(),
+ impl->slots_.end(), f, cache));
+ }
+} // namespace boost
+
+#undef BOOST_SIGNAL_FUNCTION_N_HEADER
+#undef BOOST_SIGNALS_ARGS_STRUCT_INST
+#undef BOOST_SIGNALS_CALL_BOUND
+#undef BOOST_SIGNALS_ARGS_STRUCT
+#undef BOOST_SIGNALS_FUNCTION
+#undef BOOST_SIGNALS_SIGNAL
+#undef BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+#endif