/usr/include/cxxtools/signal.h is in libcxxtools-dev 2.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2004-2006 by Dr. Marc Boris Duerner
* Copyright (C) 2005 Stephan Beal
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef cxxtools_Signal_h
#define cxxtools_Signal_h
#include <cxxtools/void.h>
#include <cxxtools/event.h>
#include <cxxtools/function.h>
#include <cxxtools/method.h>
#include <cxxtools/constmethod.h>
#include <cxxtools/connectable.h>
#include <list>
#include <map>
namespace cxxtools {
/** @internal
*/
class SignalBase : public Connectable
{
public:
struct Sentry
{
Sentry(const SignalBase* signal);
~Sentry();
void detach();
bool operator!() const
{ return _signal == 0; }
const SignalBase* _signal;
};
SignalBase();
~SignalBase();
SignalBase& operator=(const SignalBase& other);
virtual void onConnectionOpen(const Connection& c);
virtual void onConnectionClose(const Connection& c);
void disconnectSlot(const Slot& slot);
private:
mutable Sentry* _sentry;
mutable bool _sending;
mutable bool _dirty;
};
#include <cxxtools/signal.tpp>
struct CompareEventTypeInfo
{
bool operator()( const std::type_info* t1,
const std::type_info* t2 ) const;
};
template <>
class Signal<const cxxtools::Event&> : public Connectable
, protected NonCopyable
{
struct Sentry
{
Sentry(const Signal* signal);
~Sentry();
void detach();
bool operator!() const
{ return _signal == 0; }
const Signal* _signal;
};
class IEventRoute
{
public:
IEventRoute(Connection& target)
: _target(target)
{ }
virtual ~IEventRoute() {}
virtual void route(const cxxtools::Event& ev)
{
typedef Invokable<const cxxtools::Event&> InvokableT;
const InvokableT* invokable = static_cast<const InvokableT*>( _target.slot().callable() );
invokable->invoke(ev);
}
Connection& connection()
{ return _target; }
bool valid() const
{ return _target.valid(); }
private:
Connection _target;
};
template <typename EventT>
class EventRoute : public IEventRoute
{
public:
EventRoute(Connection& target)
: IEventRoute(target)
{ }
virtual void route(const cxxtools::Event& ev)
{
typedef Invokable<const cxxtools::Event&> InvokableT;
const InvokableT* invokable = static_cast<const InvokableT*>( connection().slot().callable() );
const EventT& event = static_cast<const EventT&>(ev);
invokable->invoke(event);
}
};
typedef std::multimap< const std::type_info*,
IEventRoute*,
CompareEventTypeInfo > RouteMap;
public:
Signal();
~Signal();
void send(const cxxtools::Event& ev) const;
template <typename R>
Connection connect(const BasicSlot<R, const cxxtools::Event&>& slot)
{
Connection conn( *this, slot.clone() );
this->addRoute( 0, new IEventRoute(conn) );
return conn;
}
template <typename R>
void disconnect(const BasicSlot<R, const cxxtools::Event&>& slot)
{
this->removeRoute(slot);
}
template <typename EventT>
void subscribe( const BasicSlot<void, const EventT&>& slot )
{
Connection conn( *this, slot.clone() );
const std::type_info& ti = typeid(EventT);
this->addRoute( &ti, new EventRoute<EventT>(conn) );
}
template <typename EventT>
void unsubscribe( const BasicSlot<void, const EventT&>& slot )
{
const std::type_info& ti = typeid(EventT);
this->removeRoute(&ti, slot);
}
virtual void onConnectionOpen(const Connection& c);
virtual void onConnectionClose(const Connection& c);
protected:
void addRoute(const std::type_info* ti, IEventRoute* route);
void removeRoute(const Slot& slot);
void removeRoute(const std::type_info* ti, const Slot& slot);
private:
mutable RouteMap _routes;
mutable Sentry* _sentry;
mutable bool _sending;
mutable bool _dirty;
};
template <typename R>
Connection connect(Signal<const cxxtools::Event&>& signal, R(*func)(const cxxtools::Event&))
{
return signal.connect( slot(func) );
}
template <typename R, class BaseT, class ClassT>
Connection connect( Signal<const cxxtools::Event&>& signal,
BaseT& object, R(ClassT::*memFunc)(const cxxtools::Event&) )
{
return signal.connect( slot(object, memFunc) );
}
template <typename R, class BaseT, class ClassT>
Connection connect( Signal<const cxxtools::Event&>& signal,
BaseT& object, R(ClassT::*memFunc)(const cxxtools::Event&) const )
{
return signal.connect( slot(object, memFunc) );
}
inline Connection connect(Signal<const cxxtools::Event&>& sender, Signal<const cxxtools::Event&>& receiver)
{
return sender.connect( slot(receiver) );
}
template <typename R>
void disconnect(Signal<const cxxtools::Event&>& signal, R(*func)(const cxxtools::Event&))
{
signal.disconnect( slot(func) );
}
template <typename R, class BaseT, class ClassT>
void disconnect( Signal<const cxxtools::Event&>& signal,
BaseT& object, R(ClassT::*memFunc)(const cxxtools::Event&) )
{
signal.disconnect( slot(object, memFunc) );
}
template <typename R, class BaseT, class ClassT>
void disconnect( Signal<const cxxtools::Event&>& signal,
BaseT& object, R(ClassT::*memFunc)(const cxxtools::Event&) const )
{
signal.disconnect( slot(object, memFunc) );
}
inline void disconnect(Signal<const cxxtools::Event&>& sender, Signal<const cxxtools::Event&>& receiver)
{
sender.disconnect( slot(receiver) );
}
} // !namespace cxxtools
#endif
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