boost/signals2/signal_base.hpp

   1 // Boost.Signals2 library
   2
   3 // Copyright Frank Mori Hess 2007-2008.
   4 // Use, modification and
   5 // distribution is subject to the Boost Software License, Version
   6 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 // For more information, see http://www.boost.org
  10
  11 #ifndef BOOST_SIGNALS2_SIGNAL_BASE_HPP
  12 #define BOOST_SIGNALS2_SIGNAL_BASE_HPP
  13
  14 #include <boost/noncopyable.hpp>
  15
  16 namespace boost {
  17   namespace signals2 {
  18     class slot_base;
  19
  20     class signal_base : public noncopyable
  21     {
  22     public:
  23       friend class slot_base;
  24
  25       virtual ~signal_base() {}
  26     protected:
  27       virtual shared_ptr<void> lock_pimpl() const = 0;
  28     };
  29   } // end namespace signals2
  30 } // end namespace boost
  31
  32 #endif // BOOST_SIGNALS2_SIGNAL_BASE_HPP