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