Added boost header

test/external/boost/signals/detail/signal_base.hpp

@@ -0,0 +1,159 @@
+// 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_SIGNAL_BASE_HEADER
+#define BOOST_SIGNALS_SIGNAL_BASE_HEADER
+
+#include <boost/signals/detail/config.hpp>
+#include <boost/signals/detail/signals_common.hpp>
+#include <boost/signals/detail/named_slot_map.hpp>
+#include <boost/signals/connection.hpp>
+#include <boost/signals/trackable.hpp>
+#include <boost/signals/slot.hpp>
+#include <boost/smart_ptr.hpp>
+#include <boost/utility.hpp>
+#include <boost/function/function2.hpp>
+#include <utility>
+#include <vector>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+  namespace BOOST_SIGNALS_NAMESPACE {
+    namespace detail {
+      // Must be constructed before calling the slots, because it safely
+      // manages call depth
+      class BOOST_SIGNALS_DECL call_notification {
+      public:
+        call_notification(const shared_ptr<signal_base_impl>&);
+        ~call_notification();
+
+        shared_ptr<signal_base_impl> impl;
+      };
+
+      // Implementation of base class for all signals. It handles the
+      // management of the underlying slot lists.
+      class BOOST_SIGNALS_DECL signal_base_impl {
+      public:
+        friend class call_notification;
+
+        typedef function2<bool, stored_group, stored_group> compare_type;
+
+        // Make sure that an exception does not cause the "clearing" flag to
+        // remain set
+        class temporarily_set_clearing {
+        public:
+          temporarily_set_clearing(signal_base_impl* b) : base(b)
+          {
+            base->flags.clearing = true;
+          }
+
+          ~temporarily_set_clearing()
+          {
+            base->flags.clearing = false;
+          }
+
+        private:
+          signal_base_impl* base;
+        };
+
+        friend class temporarily_set_clearing;
+
+        signal_base_impl(const compare_type&, const any&);
+        ~signal_base_impl();
+
+        // Disconnect all slots connected to this signal
+        void disconnect_all_slots();
+
+        // Are there any connected slots?
+        bool empty() const;
+
+        // The number of connected slots
+        std::size_t num_slots() const;
+
+        // Disconnect all slots in the given group
+        void disconnect(const stored_group&);
+
+        // We're being notified that a slot has disconnected
+        static void slot_disconnected(void* obj, void* data);
+
+        connection connect_slot(const any& slot,
+                                const stored_group& name,
+                                shared_ptr<slot_base::data_t> data,
+                                connect_position at);
+
+      private:
+        // Remove all of the slots that have been marked "disconnected"
+        void remove_disconnected_slots() const;
+
+      public:
+        // Our call depth when invoking slots (> 1 when we have a loop)
+        mutable int call_depth;
+
+        struct {
+          // True if some slots have disconnected, but we were not able to
+          // remove them from the list of slots because there are valid
+          // iterators into the slot list
+          mutable bool delayed_disconnect:1;
+
+          // True if we are disconnecting all disconnected slots
+          bool clearing:1;
+        } flags;
+
+        // Slots
+        mutable named_slot_map slots_;
+        any combiner_;
+
+        // Types
+        typedef named_slot_map::iterator iterator;
+      };
+
+      class BOOST_SIGNALS_DECL signal_base : public noncopyable {
+      public:
+        typedef signal_base_impl::compare_type compare_type;
+
+        friend class call_notification;
+
+        signal_base(const compare_type& comp, const any& combiner);
+        ~signal_base();
+
+      public:
+        // Disconnect all slots connected to this signal
+        void disconnect_all_slots() { impl->disconnect_all_slots(); }
+
+        // Are there any connected slots?
+        bool empty() const { return impl->empty(); }
+
+        // How many slots are connected?
+        std::size_t num_slots() const { return impl->num_slots(); }
+
+      protected:
+        connection connect_slot(const any& slot,
+                                const stored_group& name,
+                                shared_ptr<slot_base::data_t> data,
+                                connect_position at)
+        {
+          return impl->connect_slot(slot, name, data, at);
+        }
+
+        typedef named_slot_map::iterator iterator;
+
+        shared_ptr<signal_base_impl> impl;
+      };
+    } // end namespace detail
+  } // end namespace BOOST_SIGNALS_NAMESPACE
+} // end namespace boost
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif
+
+#endif // BOOST_SIGNALS_SIGNAL_BASE_HEADER