3 * Copyright 1999 Karl Nelson <kenelson@ece.ucdavis.edu>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the Free
17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #include <sigc++/basic_signal.h>
21 #ifdef SIGC_CXX_NAMESPACES
24 #endif //SIGC_CXX_NAMESPACES
26 Signal_::Impl::Impl():incoming_(),outgoing_() {}
27 Signal_::Impl::~Impl() {}
39 bool Signal_::empty() const
41 return (!impl||impl->outgoing_.empty());
47 impl->outgoing_.clear();
50 SlotData* Signal_::out_connect(SlotData *sd)
52 // we now reference the object
56 if (!impl) impl=new Impl();
57 impl->outgoing_.insert_direct(impl->outgoing_.begin(),sd->sender());
61 SlotData* Signal_::in_connect()
63 SlotData* sd=manage(new SlotData());
64 if (!impl) impl=new Impl();
65 impl->incoming_.insert_direct(impl->incoming_.end(),sd->receiver());
69 #ifdef SIGC_CXX_NAMESPACES