/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2008 INRIA
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
*/
#ifndef TRACE_SOURCE_ACCESSOR_H
#define TRACE_SOURCE_ACCESSOR_H
#include <stdint.h>
#include "object-base.h"
#include "callback.h"
#include "ptr.h"
namespace ns3 {
/**
* \brief control access to objects' trace sources
*
* This class abstracts the kind of trace source to which we want to connect.
*/
class TraceSourceAccessor : public ObjectBase
{
public:
TraceSourceAccessor ();
virtual ~TraceSourceAccessor ();
void Ref (void) const;
void Unref (void) const;
/**
* \param obj the object instance which contains the target trace source.
* \param cb the callback to connect to the target trace source.
*/
virtual bool Connect (ObjectBase *obj, const CallbackBase &cb) const = 0;
/**
* \param obj the object instance which contains the target trace source.
* \param context the context to bind to the user callback.
* \param cb the callback to connect to the target trace source.
*/
virtual bool ConnectWithContext (ObjectBase *obj, std::string context, const CallbackBase &cb) const = 0;
/**
* \param obj the object instance which contains the target trace source.
* \param cb the callback to disconnect from the target trace source.
*/
virtual bool Disconnect (ObjectBase *obj, const CallbackBase &cb) const = 0;
/**
* \param obj the object instance which contains the target trace source.
* \param context the context which was bound to the user callback.
* \param cb the callback to disconnect from the target trace source.
*/
virtual bool DisconnectWithContext (ObjectBase *obj, std::string context, const CallbackBase &cb) const = 0;
private:
mutable uint32_t m_count;
};
/**
* \param a the trace source
*
* Create a TraceSourceAccessor which will control access to the underlying
* trace source.
*/
template <typename T>
Ptr<const TraceSourceAccessor> MakeTraceSourceAccessor (T a);
} // namespace ns3
namespace ns3 {
template <typename T, typename SOURCE>
Ptr<const TraceSourceAccessor>
DoMakeTraceSourceAccessor (SOURCE T::*a)
{
struct Accessor : public TraceSourceAccessor
{
virtual bool Connect (ObjectBase *obj, const CallbackBase &cb) const {
T *p = dynamic_cast<T*> (obj);
if (p == 0)
{
return false;
}
(p->*m_source).Connect (cb);
return true;
}
virtual bool ConnectWithContext (ObjectBase *obj, std::string context, const CallbackBase &cb) const {
T *p = dynamic_cast<T*> (obj);
if (p == 0)
{
return false;
}
(p->*m_source).ConnectWithContext (cb, context);
return true;
}
virtual bool Disconnect (ObjectBase *obj, const CallbackBase &cb) const {
T *p = dynamic_cast<T*> (obj);
if (p == 0)
{
return false;
}
(p->*m_source).Disconnect (cb);
return true;
}
virtual bool DisconnectWithContext (ObjectBase *obj, std::string context, const CallbackBase &cb) const {
T *p = dynamic_cast<T*> (obj);
if (p == 0)
{
return false;
}
(p->*m_source).DisconnectWithContext (cb, context);
return true;
}
SOURCE T::*m_source;
} *accessor = new Accessor ();
accessor->m_source = a;
return Ptr<const TraceSourceAccessor> (accessor, false);
}
template <typename T>
Ptr<const TraceSourceAccessor> MakeTraceSourceAccessor (T a)
{
return DoMakeTraceSourceAccessor (a);
}
} // namespace ns3
#endif /* TRACE_SOURCE_ACCESSOR_H */