191 lines
4.4 KiB
C++
191 lines
4.4 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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#include "attribute.h"
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#include "log.h"
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#include "fatal-error.h"
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#include <sstream>
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NS_LOG_COMPONENT_DEFINE ("AttributeValue");
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namespace ns3 {
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AttributeValue::AttributeValue ()
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: m_count (1)
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{}
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AttributeValue::AttributeValue (const AttributeValue &o)
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: m_count (1)
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{}
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AttributeValue &
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AttributeValue::operator = (const AttributeValue &o)
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{
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return *this;
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}
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AttributeValue::~AttributeValue ()
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{}
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/***************************************************************
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* Big interesting warning.
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* ------------------------
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*
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* One might wonder why we re-implement a smart pointer below
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* in the Attribute class. This is a very good question and the answer
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* is unfortunately pretty complicated.
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*
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* 1) We could have requested the user to use Ptr<AttributeValue> and save us
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* a lot of pain. This, however, does not work because our smart
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* pointer needs a special constructor which can be used to convert
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* objects of type Ptr<T> into a PtrValue<T> to hold the pointer.
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*
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* 2) We could have made the m_value member variable below a Ptr<AttributeValue>
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* rather than store a raw pointer. This, however, does not work
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* because this would mean that the constructor Attribute (AttributeValue *)
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* should be morphed into Attribute (Ptr<AttributeValue>) which, unfortunately,
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* would conflict with the template constructor Attribute (Ptr<T>)...
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*
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* This is definitely not fun.
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*/
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Attribute::Attribute ()
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: m_value (0)
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{}
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Attribute::Attribute (const Attribute &o)
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: m_value (o.m_value)
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{
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if (m_value != 0)
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{
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m_value->m_count++;
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NS_LOG_DEBUG ("this="<<m_value<<" ++count="<<m_value->m_count);
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}
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}
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Attribute &
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Attribute::operator = (const Attribute &o)
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{
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if (&o != this)
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{
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if (m_value != 0)
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{
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m_value->m_count--;
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NS_LOG_DEBUG ("this="<<m_value<<" --count="<<m_value->m_count);
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if (m_value->m_count == 0)
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{
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delete m_value;
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m_value = 0;
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}
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}
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m_value = o.m_value;
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if (m_value != 0)
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{
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m_value->m_count++;
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NS_LOG_DEBUG ("this="<<m_value<<" ++count="<<m_value->m_count);
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}
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}
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return *this;
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}
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Attribute::~Attribute ()
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{
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if (m_value != 0)
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{
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m_value->m_count--;
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NS_LOG_DEBUG ("this="<<m_value<<" --count="<<m_value->m_count);
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if (m_value->m_count == 0)
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{
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delete m_value;
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m_value = 0;
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}
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}
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}
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Attribute::Attribute (AttributeValue *value)
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: m_value (value)
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{
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NS_LOG_DEBUG ("this="<<m_value<<" count="<<((m_value!=0)?m_value->m_count:666));
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}
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Attribute
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Attribute::Copy (void) const
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{
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return m_value->Copy ();
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}
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std::string
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Attribute::SerializeToString (Ptr<const AttributeChecker> checker) const
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{
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return m_value->SerializeToString (checker);
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}
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bool
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Attribute::DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker)
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{
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return m_value->DeserializeFromString (value, checker);
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}
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AttributeAccessor::AttributeAccessor ()
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: m_count (1)
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{}
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void
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AttributeAccessor::Ref (void) const
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{
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m_count++;
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}
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void
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AttributeAccessor::Unref (void) const
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{
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m_count--;
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if (m_count == 0)
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{
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delete this;
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}
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}
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AttributeAccessor::~AttributeAccessor ()
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{}
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AttributeChecker::AttributeChecker ()
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: m_count (1)
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{}
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void
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AttributeChecker::Ref (void) const
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{
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m_count++;
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}
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void
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AttributeChecker::Unref (void) const
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{
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m_count--;
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if (m_count == 0)
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{
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delete this;
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}
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}
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AttributeChecker::~AttributeChecker ()
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{}
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std::string
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PtrValueBase::SerializeToString (Ptr<const AttributeChecker> checker) const
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{
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std::ostringstream oss;
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oss << PeekObjectBase ();
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return oss.str ();
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}
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bool
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PtrValueBase::DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker)
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{
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// XXX
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return false;
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}
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} // namespace ns3
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