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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/signals/detail/signal_base.hpp
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+// 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