750 lines
21 KiB
C++
750 lines
21 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2007 INRIA, Gustavo Carneiro
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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: Gustavo Carneiro <gjcarneiro@gmail.com>,
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* Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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*/
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#ifndef OBJECT_H
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#define OBJECT_H
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#include <stdint.h>
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#include <string>
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#include "ptr.h"
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#include "trace-resolver.h"
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#include "callback.h"
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#include "attribute.h"
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#include "object-base.h"
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#define NS_OBJECT_ENSURE_REGISTERED(type) \
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static struct X##type##RegistrationClass \
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{ \
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X##type##RegistrationClass () { \
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ns3::TypeId tid = type::GetTypeId (); \
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tid.GetParent (); \
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} \
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} x_##type##RegistrationVariable
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namespace ns3 {
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class TraceContext;
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class CallbackBase;
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class Object;
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class AttributeAccessor;
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class AttributeValue;
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class Parameters;
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/**
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* \brief a unique identifier for an interface.
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*
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* This class records a lot of meta-information about a
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* subclass of the Object base class:
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* - the base class of the subclass
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* - the set of accessible constructors in the subclass
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* - the set of 'parameters' accessible in the subclass
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*/
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class TypeId
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{
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public:
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enum {
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ATTR_GET = 1<<0,
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ATTR_SET = 1<<1,
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ATTR_CONSTRUCT = 1<<2,
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ATTR_SGC = ATTR_GET | ATTR_SET | ATTR_CONSTRUCT,
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};
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/**
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* \param name the name of the requested interface
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* \returns the unique id associated with the requested
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* name.
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*
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* This method cannot fail: it will crash if the input
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* name is not a valid interface name.
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*/
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static TypeId LookupByName (std::string name);
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/**
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* \returns the number of TypeId instances constructed
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*/
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static uint32_t GetRegisteredN (void);
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/**
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* \param i index
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* \returns the TypeId instance whose index is \i.
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*/
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static TypeId GetRegistered (uint32_t i);
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/**
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* \param name the name of the interface to construct.
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*
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* No two instances can share the same name.
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*/
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TypeId (std::string name);
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/**
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* \returns the parent of this TypeId
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*
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* This method cannot fail: it will crash if the input
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* id is not a valid interface id.
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*/
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TypeId GetParent (void) const;
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/**
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* \returns the name of the group associated to this TypeId.
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*/
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std::string GetGroupName (void) const;
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/**
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* \returns the fully-qualified C++ typename of this TypeId.
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*/
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std::string GetTypeName (void) const;
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/**
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* \returns the name of this interface.
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*/
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std::string GetName (void) const;
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/**
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* \returns true if this TypeId has a constructor
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*/
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bool HasConstructor (void) const;
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/**
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* \returns the number of parameters associated to this TypeId
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*/
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uint32_t GetParametersN (void) const;
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/**
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* \param i index into parameter array
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* \returns the name associated to the parameter whose
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* index is \i i.
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*/
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std::string GetParameterName (uint32_t i) const;
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/**
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* \param i index into parameter array
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* \returns the full name associated to the parameter whose
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* index is \i i.
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*/
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std::string GetParameterFullName (uint32_t i) const;
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Attribute GetParameterInitialValue (uint32_t i) const;
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Ptr<Object> CreateObject (const Parameters ¶meters) const;
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Ptr<Object> CreateObject (void) const;
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template <typename T1>
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Ptr<Object> CreateObject (T1 a1) const;
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template <typename T1, typename T2>
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Ptr<Object> CreateObject (T1 a1, T2 a2) const;
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/**
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* \param tid the TypeId of the base class.
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* \return this TypeId instance.
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*
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* Record in this TypeId which TypeId is the TypeId
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* of the base class of the subclass.
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*/
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TypeId SetParent (TypeId tid);
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/**
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* \return this TypeId instance.
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*
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* Record in this TypeId which TypeId is the TypeId
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* of the base class of the subclass.
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*/
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template <typename T>
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TypeId SetParent (void);
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/**
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* \param groupName the name of the group this TypeId belongs to.
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* \returns this TypeId instance.
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*
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* The group name is purely an advisory information used to
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* group together types according to a user-specific grouping
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* scheme.
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*/
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TypeId SetGroupName (std::string groupName);
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/**
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* \param typeName the fully-qualified C++ typename of this TypeId.
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* \returns this TypeId instance.
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*/
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TypeId SetTypeName (std::string typeName);
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/**
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* \returns this TypeId instance
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*
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* Record in this TypeId the fact that the default constructor
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* is accessible.
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*/
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template <typename T>
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TypeId AddConstructor (void);
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template <typename T, typename T1>
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TypeId AddConstructor (void);
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template <typename T, typename T1, typename T2>
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TypeId AddConstructor (void);
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/**
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* \param name the name of the new parameter
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* \param help some help text which describes the purpose of this
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* parameter
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* \param param an instance of the associated Accessor subclass
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* \returns this TypeId instance
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*
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* Record in this TypeId the fact that a new parameter exists.
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*/
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TypeId AddParameter (std::string name,
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std::string help,
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Attribute initialValue,
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Ptr<const AttributeAccessor> spec,
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Ptr<const AttributeChecker> checker);
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/**
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* \param name the name of the new parameter
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* \param help some help text which describes the purpose of this
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* parameter
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* \param flags flags which describe how this parameter can be read and/or written.
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* \param param an instance of the associated Accessor subclass
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* \returns this TypeId instance
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*
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* Record in this TypeId the fact that a new parameter exists.
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*/
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TypeId AddParameter (std::string name,
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std::string help,
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uint32_t flags,
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Attribute initialValue,
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Ptr<const AttributeAccessor> spec,
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Ptr<const AttributeChecker> checker);
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// construct an invalid TypeId.
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TypeId ();
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~TypeId ();
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private:
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friend class Object;
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friend class Parameters;
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friend bool operator == (TypeId a, TypeId b);
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friend bool operator != (TypeId a, TypeId b);
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struct ParameterInfo {
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Ptr<const AttributeAccessor> spec;
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Attribute initialValue;
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uint32_t flags;
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Ptr<const AttributeChecker> checker;
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};
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/**
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* \param name the name of the requested parameter
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* \returns the Accessor associated to the requested parameter
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*/
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bool LookupParameterByName (std::string name, struct ParameterInfo *info) const;
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/**
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* \param i the position of the requested parameter
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* \returns the Accessor associated to the requested parameter
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*/
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bool LookupParameterByPosition (uint32_t i, struct ParameterInfo *info) const;
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/**
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* \param fullName the full name of the requested parameter
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* \returns the Accessor associated to the requested parameter
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*/
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static bool LookupParameterByFullName (std::string fullName, struct ParameterInfo *info);
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explicit TypeId (uint16_t tid);
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void DoAddConstructor (CallbackBase callback, uint32_t nArguments);
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CallbackBase LookupConstructor (uint32_t nArguments) const;
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Ptr<const AttributeAccessor> GetParameterAccessor (uint32_t i) const;
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uint32_t GetParameterFlags (uint32_t i) const;
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Ptr<const AttributeChecker> GetParameterChecker (uint32_t i) const;
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uint16_t m_tid;
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};
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/**
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* \brief a container of parameters to be used during object's construction
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* and in ns3::Object::Set.
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*
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*/
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class Parameters
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{
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public:
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Parameters ();
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Parameters (const Parameters &o);
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Parameters &operator = (const Parameters &o);
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~Parameters ();
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/**
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* \param name the name of the parameter to set
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* \param value the value to set
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*
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* This method checks that a parameter with the requested
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* name exists and that the value specified is an acceptable
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* value of that parameter. If any of these checks fails,
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* the program terminates with a message.
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*/
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bool Set (std::string name, Attribute value);
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void SetWithTid (TypeId tid, std::string name, Attribute value);
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void SetWithTid (TypeId tid, uint32_t position, Attribute value);
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/**
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* Clear the content of this instance.
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*/
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void Reset (void);
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/**
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* \returns the global parameter container
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*
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* The global parameter container can be used to specify
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* a set of parameter values without having to re-specify
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* them for each object when it is created. This container
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* is checked only during object construction and
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* it is always checked last, after any per-object
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* container is checked.
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*/
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static Parameters *GetGlobal (void);
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std::string SerializeToString (void) const;
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bool DeserializeFromString (std::string value);
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private:
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friend class Object;
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struct Param {
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Ptr<const AttributeChecker> checker;
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Attribute value;
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};
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typedef std::vector<struct Param> Params;
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typedef Params::iterator Iterator;
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typedef Params::const_iterator CIterator;
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bool DoSet (struct TypeId::ParameterInfo *info, Attribute param);
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void DoSetOne (Ptr<const AttributeChecker> checker, Attribute param);
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std::string LookupParameterFullNameByChecker (Ptr<const AttributeChecker> checker) const;
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Params m_parameters;
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};
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/**
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* \brief a base class which provides memory management and object aggregation
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*
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*/
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class Object : public ObjectBase
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{
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public:
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static TypeId GetTypeId (void);
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Object ();
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virtual ~Object ();
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/**
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* \param name the name of the parameter to set
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* \param value the name of the parameter to set
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*
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* Set a single parameter.
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*/
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bool Set (std::string name, Attribute value);
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/**
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* \param name the name of the parameter to read
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* \param value a reference to the string where the value of the
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* parameter should be stored.
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* \returns true if the requested parameter was found, false otherwise.
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*/
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bool Get (std::string name, std::string &value) const;
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/**
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* \param name the name of the parameter to read
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* \param value a reference to the object where the value of the
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* parameter should be stored.
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* \returns true if the requested parameter was found, false otherwise.
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*/
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Attribute Get (std::string name) const;
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/**
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* Increment the reference count. This method should not be called
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* by user code. Object instances are expected to be used in conjunction
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* of the Ptr template which would make calling Ref unecessary and
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* dangerous.
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*/
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inline void Ref (void) const;
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/**
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* Decrement the reference count. This method should not be called
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* by user code. Object instances are expected to be used in conjunction
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* of the Ptr template which would make calling Ref unecessary and
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* dangerous.
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*/
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inline void Unref (void) const;
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/**
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* \returns a pointer to the requested interface or zero if it could not be found.
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*/
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template <typename T>
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Ptr<T> GetObject (void) const;
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/**
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* \param tid the interface id of the requested interface
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* \returns a pointer to the requested interface or zero if it could not be found.
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*/
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template <typename T>
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Ptr<T> GetObject (TypeId tid) const;
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/**
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* Run the DoDispose methods of this object and all the
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* objects aggregated to it.
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* After calling this method, the object is expected to be
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* totally unusable except for the Ref and Unref methods.
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* It is an error to call Dispose twice on the same object
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* instance
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*/
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void Dispose (void);
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/**
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* \param other another object pointer
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*
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* This method aggregates the two objects together: after this
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* method returns, it becomes possible to call GetObject
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* on one to get the other, and vice-versa.
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*/
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void AggregateObject (Ptr<Object> other);
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/**
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* \param path the path to match for the callback
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* \param cb callback to connect
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*
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* Connect the input callback to all trace sources which
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* match the input path.
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*
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*/
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void TraceConnect (std::string path, const CallbackBase &cb) const;
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/**
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* \param path the path to match for the callback
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* \param cb callback to disconnect
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*
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* Disconnect the input callback from all trace sources which
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* match the input path.
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*/
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void TraceDisconnect (std::string path, const CallbackBase &cb) const;
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/**
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* \returns the trace resolver associated to this object.
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*
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* This method should be rarely called by users.
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*/
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virtual Ptr<TraceResolver> GetTraceResolver (void) const;
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protected:
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/**
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* This method is called by Object::Dispose.
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* Subclasses are expected to override this method and chain
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* up to their parent's implementation once they are done.
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*/
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virtual void DoDispose (void);
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virtual void NotifyConstructionCompleted (void);
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private:
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friend class TypeIdTraceResolver;
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template <typename T>
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friend Ptr<T> CreateObject (const Parameters ¶meters);
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template <typename T>
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friend Ptr<T> CreateObject (void);
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template <typename T, typename T1>
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friend Ptr<T> CreateObject (T1 a1);
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template <typename T, typename T1, typename T2>
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friend Ptr<T> CreateObject (T1 a1, T2 a2);
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template <typename T, typename T1, typename T2, typename T3>
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friend Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3);
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template <typename T, typename T1, typename T2, typename T3, typename T4>
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friend Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4);
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template <typename T, typename T1, typename T2, typename T3, typename T4, typename T5>
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friend Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5);
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template <typename T, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6>
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friend Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6);
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template <typename T, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7>
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friend Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7);
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bool DoSet (Ptr<const AttributeAccessor> spec, Attribute intialValue,
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Ptr<const AttributeChecker> checker, Attribute value);
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Ptr<Object> DoGetObject (TypeId tid) const;
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void DoCollectSources (std::string path, const TraceContext &context,
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TraceResolver::SourceCollection *collection) const;
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void DoTraceAll (std::ostream &os, const TraceContext &context) const;
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bool Check (void) const;
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bool CheckLoose (void) const;
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/**
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* Attempt to delete this object. This method iterates
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* over all aggregated objects to check if they all
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* have a zero refcount. If yes, the object and all
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* its aggregates are deleted. If not, nothing is done.
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*/
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void MaybeDelete (void) const;
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/**
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* \param tid an TypeId
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*
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* Invoked from ns3::CreateObject only.
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* Initialize the m_tid member variable to
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* keep track of the type of this object instance.
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*/
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void SetTypeId (TypeId tid);
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/**
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* \param parameters the parameter values used to initialize
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* the member variables of this object's instance.
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*
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* Invoked from ns3::CreateObject only.
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* Initialize all the member variables which were
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* registered with the associated TypeId.
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*/
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void Construct (const Parameters ¶meters);
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/**
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* The reference count for this object. Each aggregate
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* has an individual reference count. When the global
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* reference count (the sum of all reference counts)
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* reaches zero, the object and all its aggregates is
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* deleted.
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*/
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mutable uint32_t m_count;
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/**
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* Identifies the type of this object instance.
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*/
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TypeId m_tid;
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/**
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* Set to true when the DoDispose method of the object
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* has run, false otherwise.
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*/
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bool m_disposed;
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mutable bool m_collecting;
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/**
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* A pointer to the next aggregate object. This is a circular
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* linked list of aggregated objects: the last one points
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* back to the first one. If an object is not aggregated to
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* any other object, the value of this field is equal to the
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* value of the 'this' pointer.
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*/
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Object *m_next;
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};
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} // namespace ns3
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namespace ns3 {
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/*************************************************************************
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* The TypeId implementation which depends on templates
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*************************************************************************/
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template <typename T>
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TypeId
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TypeId::SetParent (void)
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{
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return SetParent (T::GetTypeId ());
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}
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template <typename T>
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TypeId
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TypeId::AddConstructor (void)
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{
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struct Maker {
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|
static Ptr<Object> Create (const Parameters ¶meters) {
|
|
return ns3::CreateObject<T> (parameters);
|
|
}
|
|
};
|
|
CallbackBase cb = MakeCallback (&Maker::Create);
|
|
DoAddConstructor (cb, 0);
|
|
return *this;
|
|
}
|
|
template <typename T, typename T1>
|
|
TypeId
|
|
TypeId::AddConstructor (void)
|
|
{
|
|
struct Maker {
|
|
static Ptr<Object> Create (T1 a1) {
|
|
return ns3::CreateObject<T,T1> (a1);
|
|
}
|
|
};
|
|
CallbackBase cb = MakeCallback (&Maker::Create);
|
|
DoAddConstructor (cb, 1);
|
|
return *this;
|
|
}
|
|
template <typename T, typename T1, typename T2>
|
|
TypeId
|
|
TypeId::AddConstructor (void)
|
|
{
|
|
struct Maker {
|
|
static Ptr<Object> Create (T1 a1, T2 a2) {
|
|
return ns3::CreateObject<T,T1,T2> (a1, a2);
|
|
}
|
|
};
|
|
CallbackBase cb = MakeCallback (&Maker::Create);
|
|
DoAddConstructor (cb, 2);
|
|
return *this;
|
|
}
|
|
template <typename T1>
|
|
Ptr<Object>
|
|
TypeId::CreateObject (T1 a1) const
|
|
{
|
|
CallbackBase cb = LookupConstructor (1);
|
|
Callback<Ptr<Object>,T1> realCb;
|
|
realCb.Assign (cb);
|
|
Ptr<Object> object = realCb (a1);
|
|
return object;
|
|
}
|
|
template <typename T1, typename T2>
|
|
Ptr<Object>
|
|
TypeId::CreateObject (T1 a1, T2 a2) const
|
|
{
|
|
CallbackBase cb = LookupConstructor (2);
|
|
Callback<Ptr<Object>,T1,T2> realCb;
|
|
realCb.Assign (cb);
|
|
Ptr<Object> object = realCb (a1,a2);
|
|
return object;
|
|
}
|
|
|
|
/*************************************************************************
|
|
* The Object implementation which depends on templates
|
|
*************************************************************************/
|
|
|
|
void
|
|
Object::Ref (void) const
|
|
{
|
|
m_count++;
|
|
}
|
|
void
|
|
Object::Unref (void) const
|
|
{
|
|
NS_ASSERT (Check ());
|
|
m_count--;
|
|
if (m_count == 0)
|
|
{
|
|
MaybeDelete ();
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
Ptr<T>
|
|
Object::GetObject () const
|
|
{
|
|
Ptr<Object> found = DoGetObject (T::GetTypeId ());
|
|
if (found != 0)
|
|
{
|
|
return Ptr<T> (dynamic_cast<T *> (PeekPointer (found)));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
template <typename T>
|
|
Ptr<T>
|
|
Object::GetObject (TypeId tid) const
|
|
{
|
|
Ptr<Object> found = DoGetObject (tid);
|
|
if (found != 0)
|
|
{
|
|
return Ptr<T> (dynamic_cast<T *> (PeekPointer (found)));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*************************************************************************
|
|
* The helper functions which need templates.
|
|
*************************************************************************/
|
|
|
|
|
|
template <typename T>
|
|
Ptr<T> CreateObject (const Parameters ¶meters)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
p->Object::Construct (parameters);
|
|
return p;
|
|
}
|
|
|
|
template <typename T>
|
|
Ptr<T> CreateObject (void)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
p->Object::Construct (Parameters ());
|
|
return p;
|
|
}
|
|
|
|
template <typename T, typename T1>
|
|
Ptr<T> CreateObject (T1 a1)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (a1), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
p->Object::Construct (Parameters ());
|
|
return p;
|
|
}
|
|
|
|
template <typename T, typename T1, typename T2>
|
|
Ptr<T> CreateObject (T1 a1, T2 a2)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (a1, a2), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
p->Object::Construct (Parameters ());
|
|
return p;
|
|
}
|
|
template <typename T, typename T1, typename T2, typename T3>
|
|
Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (a1, a2, a3), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
return p;
|
|
}
|
|
|
|
template <typename T, typename T1, typename T2, typename T3, typename T4>
|
|
Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (a1, a2, a3, a4), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
return p;
|
|
}
|
|
|
|
template <typename T, typename T1, typename T2, typename T3, typename T4, typename T5>
|
|
Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (a1, a2, a3, a4, a5), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
return p;
|
|
}
|
|
|
|
template <typename T, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6>
|
|
Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (a1, a2, a3, a4, a5, a6), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
return p;
|
|
}
|
|
|
|
template <typename T, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7>
|
|
Ptr<T> CreateObject (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7)
|
|
{
|
|
Ptr<T> p = Ptr<T> (new T (a1, a2, a3, a4, a5, a6, a7), false);
|
|
p->SetTypeId (T::GetTypeId ());
|
|
return p;
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
Ptr<T>
|
|
CreateObjectWith (std::string n1, Attribute v1,
|
|
std::string n2 = "", Attribute v2 = Attribute ())
|
|
|
|
{
|
|
Parameters parameters;
|
|
parameters.SetWithTid (T::GetTypeId (), n1, v1);
|
|
parameters.SetWithTid (T::GetTypeId (), n2, v2);
|
|
return CreateObject<T> (parameters);
|
|
}
|
|
|
|
} // namespace ns3
|
|
|
|
#endif /* OBJECT_H */
|
|
|