boost/libs/signals/src/trackable.cpp

   1 // Boost.Signals library
   2
   3 // Copyright Douglas Gregor 2001-2004. Use, modification and
   4 // distribution is subject to the Boost Software License, Version
   5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7
   8 // For more information, see http://www.boost.org
   9
  10 #define BOOST_SIGNALS_SOURCE
  11
  12 #include <boost/signals/trackable.hpp>
  13 #include <algorithm>
  14
  15 namespace boost {
  16   namespace BOOST_SIGNALS_NAMESPACE {
  17     void trackable::signal_disconnected(void* obj, void* data)
  18     {
  19       trackable* self = reinterpret_cast<trackable*>(obj);
  20       connection_iterator* signal =
  21         reinterpret_cast<connection_iterator*>(data);
  22
  23       // If we're dying, don't bother erasing the connection from the list;
  24       // it'll be gone anyway
  25       if (!self->dying) {
  26         self->connected_signals.erase(*signal);
  27       }
  28
  29       // This iterator pointer won't ever be used again
  30       delete signal;
  31     }
  32
  33     void
  34     trackable::signal_connected(connection c,
  35                                 BOOST_SIGNALS_NAMESPACE::detail::bound_object& binding) const
  36     {
  37       // Insert the connection
  38       connection_iterator pos =
  39         connected_signals.insert(connected_signals.end(), c);
  40
  41       // Make this copy of the object disconnect when destroyed
  42       pos->set_controlling();
  43
  44       binding.obj = const_cast<void*>(reinterpret_cast<const void*>(this));
  45       binding.data = reinterpret_cast<void*>(new connection_iterator(pos));
  46       binding.disconnect = &signal_disconnected;
  47     }
  48
  49     trackable::~trackable()
  50     {
  51       dying = true;
  52     }
  53   } // end namespace BOOST_SIGNALS_NAMESPACE
  54 }
  55
  56 #ifndef BOOST_MSVC
  57 // Explicit instantiations to keep in the library
  58 template class std::list<boost::BOOST_SIGNALS_NAMESPACE::connection>;
  59 #endif