--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ossrv_pub/boost_apis/boost/signals/trackable.hpp	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,195 @@
+// 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
+
+#ifndef BOOST_SIGNALS_TRACKABLE_HPP
+#define BOOST_SIGNALS_TRACKABLE_HPP
+
+#include <boost/type_traits.hpp>
+#include <boost/signals/connection.hpp>
+#include <boost/pending/ct_if.hpp>
+#include <boost/ref.hpp>
+#include <boost/utility/addressof.hpp>
+#include <list>
+#include <vector>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+
+namespace BOOST_SIGNALS_NAMESPACE {
+  // Base class for "trackable" objects that can be tracked when they are
+  // bound in slot target functions. When a trackable object is destroyed,
+  // the signal/slot connections are disconnected automatically.
+  class BOOST_SIGNALS_DECL trackable {
+  private:
+    static void signal_disconnected(void* obj, void* data);
+
+    friend class detail::signal_base_impl;
+    friend class detail::slot_base;
+    void signal_connected(connection, BOOST_SIGNALS_NAMESPACE::detail::bound_object&) const;
+
+  protected:
+    trackable() : connected_signals(), dying(false) {}
+    trackable(const trackable&) : connected_signals(), dying(false) {}
+    ~trackable();
+
+    trackable& operator=(const trackable&)
+    {
+      connected_signals.clear();
+      return *this;
+    }
+
+  private:
+    typedef std::list<connection> connection_list;
+    typedef connection_list::iterator connection_iterator;
+
+    // List of connections that this object is part of
+    mutable connection_list connected_signals;
+
+    // True when the object is being destroyed
+    mutable bool dying;
+  };
+
+  namespace detail {
+    template<bool Cond> struct truth {};
+
+    // A visitor that adds each trackable object to a vector
+    class bound_objects_visitor {
+    public:
+      bound_objects_visitor(std::vector<const trackable*>& v) :
+        bound_objects(v)
+      {
+      }
+
+      template<typename T>
+      void operator()(const T& t) const
+      {
+        decode(t, 0);
+      }
+
+    private:
+      // decode() decides between a reference wrapper and anything else
+      template<typename T>
+      void decode(const reference_wrapper<T>& t, int) const
+      {
+        add_if_trackable(t.get_pointer());
+      }
+
+      template<typename T>
+      void decode(const T& t, long) const
+      {
+        typedef truth<(is_pointer<T>::value)> is_a_pointer;
+        maybe_get_pointer(t, is_a_pointer());
+      }
+
+      // maybe_get_pointer() decides between a pointer and a non-pointer
+      template<typename T>
+      void maybe_get_pointer(const T& t, truth<true>) const
+      {
+        add_if_trackable(t);
+      }
+
+      template<typename T>
+      void maybe_get_pointer(const T& t, truth<false>) const
+      {
+        // Take the address of this object, because the object itself may be
+        // trackable
+        add_if_trackable(boost::addressof(t));
+      }
+
+      // add_if_trackable() adds trackable objects to the list of bound objects
+      inline void add_if_trackable(const trackable* b) const
+      {
+        if (b) {
+          bound_objects.push_back(b);
+        }
+      }
+
+      inline void add_if_trackable(const void*) const
+      {
+      }
+
+      template<typename R>
+      inline void add_if_trackable(R (*)()) const
+      {
+      }
+
+      template<typename R, typename T1>
+      inline void add_if_trackable(R (*)(T1)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2>
+      inline void add_if_trackable(R (*)(T1, T2)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3>
+      inline void add_if_trackable(R (*)(T1, T2, T3)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3, typename T4>
+      inline void add_if_trackable(R (*)(T1, T2, T3, T4)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3, typename T4,
+               typename T5>
+      inline void add_if_trackable(R (*)(T1, T2, T3, T4, T5)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3, typename T4,
+               typename T5, typename T6>
+      inline void add_if_trackable(R (*)(T1, T2, T3, T4, T5, T6)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3, typename T4,
+               typename T5, typename T6, typename T7>
+      inline void add_if_trackable(R (*)(T1, T2, T3, T4, T5, T6, T7)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3, typename T4,
+               typename T5, typename T6, typename T7, typename T8>
+      inline void add_if_trackable(R (*)(T1, T2, T3, T4, T5, T6, T7, T8)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3, typename T4,
+               typename T5, typename T6, typename T7, typename T8, typename T9>
+      inline void
+      add_if_trackable(R (*)(T1, T2, T3, T4, T5, T6, T7, T8, T9)) const
+      {
+      }
+
+      template<typename R, typename T1, typename T2, typename T3, typename T4,
+               typename T5, typename T6, typename T7, typename T8, typename T9,
+               typename T10>
+      inline void
+      add_if_trackable(R (*)(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)) const
+      {
+      }
+
+      std::vector<const trackable*>& bound_objects;
+    };
+  } // end namespace detail
+} // end namespace BOOST_SIGNALS_NAMESPACE
+
+} // end namespace boost
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif
+
+#endif // BOOST_SIGNALS_TRACKABLE_HPP