boost/libs/signals/src/trackable.cpp

   1 // Boost.Signals library
   2 //
   3 // Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
   4 //
   5 // Permission to copy, use, sell and distribute this software is granted
   6 // provided this copyright notice appears in all copies.
   7 // Permission to modify the code and to distribute modified code is granted
   8 // provided this copyright notice appears in all copies, and a notice
   9 // that the code was modified is included with the copyright notice.
  10 //
  11 // This software is provided "as is" without express or implied warranty,
  12 // and with no claim as to its suitability for any purpose.
  13
  14 // For more information, see http://www.boost.org
  15
  16 #include <boost/signals/trackable.hpp>
  17 #include <algorithm>
  18
  19 namespace boost {
  20   namespace BOOST_SIGNALS_NAMESPACE {
  21     void trackable::signal_disconnected(void* obj, void* data)
  22     {
  23       trackable* self = reinterpret_cast<trackable*>(obj);
  24       connection_iterator* signal =
  25         reinterpret_cast<connection_iterator*>(data);
  26
  27       // If we're dying, don't bother erasing the connection from the list;
  28       // it'll be gone anyway
  29       if (!self->dying) {
  30         self->connected_signals.erase(*signal);
  31       }
  32
  33       // This iterator pointer won't ever be used again
  34       delete signal;
  35     }
  36
  37     void
  38     trackable::signal_connected(connection c,
  39                                 BOOST_SIGNALS_NAMESPACE::detail::bound_object& binding) const
  40     {
  41       // Insert the connection
  42       connection_iterator pos =
  43         connected_signals.insert(connected_signals.end(), c);
  44
  45       // Make this copy of the object disconnect when destroyed
  46       pos->set_controlling();
  47
  48       binding.obj = const_cast<void*>(reinterpret_cast<const void*>(this));
  49       binding.data = reinterpret_cast<void*>(new connection_iterator(pos));
  50       binding.disconnect = &signal_disconnected;
  51     }
  52
  53     trackable::~trackable()
  54     {
  55       dying = true;
  56     }
  57   } // end namespace BOOST_SIGNALS_NAMESPACE
  58 }
  59
  60 #ifndef BOOST_MSVC
  61 // Explicit instantiations to keep in the library
  62 template class std::list<boost::BOOST_SIGNALS_NAMESPACE::connection>;
  63 #endif