| // 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 |
| |
| #define BOOST_SIGNALS_SOURCE |
| |
| #include <boost/signals/slot.hpp> |
| |
| namespace boost { |
| namespace BOOST_SIGNALS_NAMESPACE { |
| namespace detail { |
| void slot_base::create_connection() |
| { |
| // Create a new connection object |
| basic_connection* con = new basic_connection(); |
| |
| /* nothrow */ { |
| // The signal portion isn't really necessary, except that we need a |
| // signal for the connection to be connected. |
| con->signal = static_cast<void*>(this); |
| con->signal_data = 0; |
| con->blocked_ = false ; |
| con->signal_disconnect = &bound_object_destructed; |
| } |
| |
| // This connection watches for destruction of bound objects. Note |
| // that the reset routine will delete con if an allocation throws |
| data->watch_bound_objects.reset(con); |
| |
| // We create a scoped connection, so that exceptions thrown while |
| // adding bound objects will cause a cleanup of the bound objects |
| // already connected. |
| scoped_connection safe_connection(data->watch_bound_objects); |
| |
| // Now notify each of the bound objects that they are connected to this |
| // slot. |
| for(std::vector<const trackable*>::iterator i = |
| data->bound_objects.begin(); |
| i != data->bound_objects.end(); ++i) { |
| // Notify the object that the slot is connecting to it |
| BOOST_SIGNALS_NAMESPACE::detail::bound_object binding; |
| (*i)->signal_connected(data->watch_bound_objects, binding); |
| |
| // This will notify the bound object that the connection just made |
| // should be disconnected if an exception is thrown before the |
| // end of this iteration |
| BOOST_SIGNALS_NAMESPACE::detail::auto_disconnect_bound_object |
| disconnector(binding); |
| |
| // Add the binding to the list of bindings for the connection |
| con->bound_objects.push_back(binding); |
| |
| // The connection object now knows about the bound object, so if an |
| // exception is thrown later the connection object will notify the |
| // bound object of the disconnection automatically |
| disconnector.release(); |
| } |
| |
| // No exceptions will be thrown past this point. |
| safe_connection.release(); |
| |
| data->watch_bound_objects.set_controlling(true); |
| } |
| } // end namespace detail |
| } // end namespace BOOST_SIGNALS_NAMESPACE |
| } // end namespace boost |