trace-source-accessor.h

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/*
 * 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 "callback.h"
#include "ptr.h"
#include "simple-ref-count.h"
 
#include <stdint.h>
 
namespace ns3
{
 
class ObjectBase;
 
class TraceSourceAccessor : public SimpleRefCount<TraceSourceAccessor>
{
  public:
    TraceSourceAccessor();
    virtual ~TraceSourceAccessor();
 
    virtual bool ConnectWithoutContext(ObjectBase* obj, const CallbackBase& cb) const = 0;
    virtual bool Connect(ObjectBase* obj, std::string context, const CallbackBase& cb) const = 0;
    virtual bool DisconnectWithoutContext(ObjectBase* obj, const CallbackBase& cb) const = 0;
    virtual bool Disconnect(ObjectBase* obj, std::string context, const CallbackBase& cb) const = 0;
};
 
template <typename T>
Ptr<const TraceSourceAccessor> MakeTraceSourceAccessor(T a);
 
static inline Ptr<const TraceSourceAccessor>
MakeEmptyTraceSourceAccessor()
{
    return Ptr<const TraceSourceAccessor>(nullptr);
}
 
} // namespace ns3
 
/********************************************************************
 *  Implementation of the templates declared above.
 ********************************************************************/
 
namespace ns3
{
 
template <typename T, typename SOURCE>
Ptr<const TraceSourceAccessor>
DoMakeTraceSourceAccessor(SOURCE T::*a)
{
    struct Accessor : public TraceSourceAccessor
    {
        bool ConnectWithoutContext(ObjectBase* obj, const CallbackBase& cb) const override
        {
            T* p = dynamic_cast<T*>(obj);
            if (p == nullptr)
            {
                return false;
            }
            (p->*m_source).ConnectWithoutContext(cb);
            return true;
        }
 
        bool Connect(ObjectBase* obj, std::string context, const CallbackBase& cb) const override
        {
            T* p = dynamic_cast<T*>(obj);
            if (p == nullptr)
            {
                return false;
            }
            (p->*m_source).Connect(cb, context);
            return true;
        }
 
        bool DisconnectWithoutContext(ObjectBase* obj, const CallbackBase& cb) const override
        {
            T* p = dynamic_cast<T*>(obj);
            if (p == nullptr)
            {
                return false;
            }
            (p->*m_source).DisconnectWithoutContext(cb);
            return true;
        }
 
        bool Disconnect(ObjectBase* obj, std::string context, const CallbackBase& cb) const override
        {
            T* p = dynamic_cast<T*>(obj);
            if (p == nullptr)
            {
                return false;
            }
            (p->*m_source).Disconnect(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 */