// Boost.Signals library
-//
-// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
-//
-// Permission to copy, use, sell and distribute this software is granted
-// provided this copyright notice appears in all copies.
-// Permission to modify the code and to distribute modified code is granted
-// provided this copyright notice appears in all copies, and a notice
-// that the code was modified is included with the copyright notice.
-//
-// This software is provided "as is" without express or implied warranty,
-// and with no claim as to its suitability for any purpose.
+
+// 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
#include <cassert>
#include <utility>
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+
namespace boost {
namespace BOOST_SIGNALS_NAMESPACE {
class trackable;
// Represents an object that has been bound as part of a slot, and how
// to notify that object of a disconnect
struct bound_object {
- void* obj;
- void* data;
- void (*disconnect)(void*, void*);
-
- bool operator==(const bound_object& other) const
- { return obj == other.obj && data == other.data; }
- bool operator<(const bound_object& other) const
- { return obj < other.obj; }
+ void* obj;
+ void* data;
+ void (*disconnect)(void*, void*);
+
+ bool operator==(const bound_object& other) const
+ { return obj == other.obj && data == other.data; }
+ bool operator<(const bound_object& other) const
+ { return obj < other.obj; }
+
+ // To support intel 80 compiler, 2004/03/18 (Mark Rodgers)
+ bool operator!=(const bound_object& other) const
+ { return !(*this==other); }
+ bool operator>(const bound_object& other) const
+ { return !(*this < other); }
};
// Describes the connection between a signal and the objects that are
// bound for a specific slot. Enables notification of the signal and the
// slots when a disconnect is requested.
struct basic_connection {
- void* signal;
- void* signal_data;
- void (*signal_disconnect)(void*, void*);
+ void* signal;
+ void* signal_data;
+ void (*signal_disconnect)(void*, void*);
+ bool blocked_;
- std::list<bound_object> bound_objects;
+ std::list<bound_object> bound_objects;
};
} // end namespace detail
// The user may freely pass around the "connection" object and terminate
// the connection at any time using disconnect().
- class connection :
+ class BOOST_SIGNALS_DECL connection :
private less_than_comparable1<connection>,
private equality_comparable1<connection>
{
public:
- connection();
+ connection() : con(), controlling_connection(false) {}
connection(const connection&);
~connection();
+ // Block he connection: if the connection is still active, there
+ // will be no notification
+ void block(bool should_block = true) { con->blocked_ = should_block; }
+ void unblock() { con->blocked_ = false; }
+ bool blocked() const { return !connected() || con->blocked_; }
+
// Disconnect the signal and slot, if they are connected
void disconnect() const;
bool connected() const { return con.get() && con->signal_disconnect; }
// Comparison of connections
- inline bool operator==(const connection& other) const;
- inline bool operator<(const connection& other) const;
+ bool operator==(const connection& other) const;
+ bool operator<(const connection& other) const;
// Connection assignment
connection& operator=(const connection& other) ;
// Swap connections
- inline void swap(connection& other);
+ void swap(connection& other);
public: // TBD: CHANGE THIS
// Set whether this connection object is controlling or not
- void set_controlling() { controlling_connection = true; }
+ void set_controlling(bool control = true)
+ { controlling_connection = control; }
+
+ shared_ptr<BOOST_SIGNALS_NAMESPACE::detail::basic_connection>
+ get_connection() const
+ { return con; }
private:
friend class detail::signal_base_impl;
// Similar to connection, but will disconnect the connection when it is
// destroyed unless release() has been called.
- class scoped_connection : public connection {
+ class BOOST_SIGNALS_DECL scoped_connection : public connection {
public:
scoped_connection() : connection(), released(false) {}
scoped_connection(const connection&);
connection release();
- void swap(scoped_connection&);
+ inline void swap(scoped_connection&);
scoped_connection& operator=(const connection&);
scoped_connection& operator=(const scoped_connection&);
bool released;
};
- inline connection::connection() :
- con(), controlling_connection(false)
- {
- }
-
- inline connection::connection(const connection& other) :
- con(other.con), controlling_connection(other.controlling_connection)
- {
- }
-
- inline connection::~connection()
- {
- if (controlling_connection) {
- disconnect();
- }
- }
-
- inline void
- connection::reset(BOOST_SIGNALS_NAMESPACE::detail::basic_connection* new_con)
- {
- con.reset(new_con);
- }
-
- inline void
- connection::add_bound_object(const BOOST_SIGNALS_NAMESPACE::detail::bound_object& b)
- {
- assert(con.get() != 0);
- con->bound_objects.push_back(b);
- }
-
- inline bool connection::operator==(const connection& other) const
- {
- return con.get() == other.con.get();
- }
-
- inline bool connection::operator<(const connection& other) const
- {
- return con.get() < other.con.get();
- }
-
- inline connection& connection::operator=(const connection& other)
- {
- connection(other).swap(*this);
- return *this;
- }
-
- inline void connection::swap(connection& other)
- {
- this->con.swap(other.con);
- std::swap(this->controlling_connection, other.controlling_connection);
- }
-
- inline void swap(connection& c1, connection& c2)
- {
- c1.swap(c2);
- }
-
- inline scoped_connection::scoped_connection(const connection& other) :
- connection(other),
- released(false)
- {
- }
-
- inline
- scoped_connection::scoped_connection(const scoped_connection& other) :
- connection(other),
- released(other.released)
- {
- }
-
- inline scoped_connection::~scoped_connection()
- {
- if (!released) {
- this->disconnect();
- }
- }
-
- inline connection scoped_connection::release()
- {
- released = true;
- return *this;
- }
-
- inline void scoped_connection::swap(scoped_connection& other)
- {
- this->connection::swap(other);
- bool other_released = other.released;
- other.released = this->released;
- this->released = other_released;
- }
-
- inline void swap(scoped_connection& c1, scoped_connection& c2)
- {
- c1.swap(c2);
- }
-
- inline scoped_connection&
- scoped_connection::operator=(const connection& other)
- {
- scoped_connection(other).swap(*this);
- return *this;
- }
-
- inline scoped_connection&
- scoped_connection::operator=(const scoped_connection& other)
- {
- scoped_connection(other).swap(*this);
- return *this;
- }
-
namespace detail {
struct connection_slot_pair {
- connection first;
- any second;
+ connection first;
+ any second;
- connection_slot_pair() {}
+ connection_slot_pair() {}
- connection_slot_pair(const connection& c, const any& a)
- : first(c), second(a)
- {
- }
+ connection_slot_pair(const connection& c, const any& a)
+ : first(c), second(a)
+ {
+ }
- // Dummys to allow explicit instantiation to work
- bool operator==(const connection_slot_pair&) const { return false; }
- bool operator<(const connection_slot_pair&) const { return false;}
+ // Dummys to allow explicit instantiation to work
+ bool operator==(const connection_slot_pair&) const { return false; }
+ bool operator<(const connection_slot_pair&) const { return false;}
};
// Determines if the underlying connection is disconnected
struct is_disconnected {
- typedef std::pair<const any, connection_slot_pair> argument_type;
- typedef bool result_type;
+ typedef connection_slot_pair argument_type;
+ typedef bool result_type;
- inline bool operator()(const argument_type& c) const
- {
- return !c.second.first.connected();
- }
+ inline bool operator()(const argument_type& c) const
+ {
+ return !c.first.connected();
+ }
+ };
+
+ // Determines if the underlying connection is callable, ie if
+ // it is connected and not blocked
+ struct is_callable {
+ typedef connection_slot_pair argument_type;
+ typedef bool result_type;
+
+ inline bool operator()(const argument_type& c) const
+ {
+ return c.first.connected() && !c.first.blocked() ;
+ }
};
// Autodisconnects the bound object when it is destroyed unless the
// release method is invoked.
class auto_disconnect_bound_object {
public:
- auto_disconnect_bound_object(const bound_object& b) :
- binding(b), auto_disconnect(true)
- {
- }
+ auto_disconnect_bound_object(const bound_object& b) :
+ binding(b), auto_disconnect(true)
+ {
+ }
- ~auto_disconnect_bound_object()
- {
- if (auto_disconnect)
- binding.disconnect(binding.obj, binding.data);
- }
+ ~auto_disconnect_bound_object()
+ {
+ if (auto_disconnect)
+ binding.disconnect(binding.obj, binding.data);
+ }
- void release() { auto_disconnect = false; }
+ void release() { auto_disconnect = false; }
private:
- bound_object binding;
- bool auto_disconnect;
+ bound_object binding;
+ bool auto_disconnect;
};
} // end namespace detail
} // end namespace BOOST_SIGNALS_NAMESPACE
} // end namespace boost
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+#endif
+
#endif // BOOST_SIGNALS_CONNECTION_HPP
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