author | Gustavo J. A. M. Carneiro <gjc@inescporto.pt> |
Wed, 08 Aug 2007 15:10:36 +0100 | |
changeset 1217 | 2f7791ae388d |
parent 1155 | 1269189b9f41 |
child 1233 | dade465d569d |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2006 INRIA |
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* All rights reserved. |
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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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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
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*/ |
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#ifndef TAGS_H |
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#define TAGS_H |
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#include <stdint.h> |
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#include <ostream> |
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#include <vector> |
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#include "buffer.h" |
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/** |
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* \ingroup tag |
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* \brief this macro should be instantiated exactly once for each |
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* new type of Tag |
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* |
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* This macro will ensure that your new Tag type is registered |
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* within the tag registry. In most cases, this macro |
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* is not really needed but, for safety, please, use it all the |
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* time. |
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* |
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* Note: This macro is _absolutely_ needed if you try to run a |
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* distributed simulation. |
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*/ |
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#define NS_TAG_ENSURE_REGISTERED(x) \ |
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namespace { \ |
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static class thisisaveryverylongclassname \ |
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{ \ |
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public: \ |
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thisisaveryverylongclassname () \ |
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{ uint32_t uid; uid = x::GetUid ();} \ |
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} g_thisisanotherveryveryverylongname; \ |
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} |
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namespace ns3 { |
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template <typename T> |
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class TagPrettyPrinter; |
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/** |
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* \ingroup constants |
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* \brief Tag maximum size |
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* The maximum size (in bytes) of a Tag is stored |
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* in this constant. |
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*/ |
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#define TAGS_MAX_SIZE 16 |
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class Tags { |
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public: |
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inline Tags (); |
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inline Tags (Tags const &o); |
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inline Tags &operator = (Tags const &o); |
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inline ~Tags (); |
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template <typename T> |
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void Add (T const&tag); |
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template <typename T> |
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bool Remove (T &tag); |
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template <typename T> |
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bool Peek (T &tag) const; |
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void Print (std::ostream &os) const; |
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uint32_t GetSerializedSize (void) const; |
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void Serialize (Buffer::Iterator i, uint32_t size) const; |
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uint32_t Deserialize (Buffer::Iterator i); |
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inline void RemoveAll (void); |
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enum { |
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SIZE = TAGS_MAX_SIZE |
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}; |
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private: |
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struct TagData { |
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uint8_t m_data[Tags::SIZE]; |
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struct TagData *m_next; |
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uint32_t m_id; |
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uint32_t m_count; |
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}; |
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bool Remove (uint32_t id); |
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struct Tags::TagData *AllocData (void); |
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void FreeData (struct TagData *data); |
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static struct Tags::TagData *gFree; |
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static uint32_t gN_free; |
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struct TagData *m_next; |
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}; |
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} // namespace ns3 |
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/************************************************************** |
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An implementation of the templates defined above |
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*************************************************************/ |
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#include "ns3/assert.h" |
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#include <string> |
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namespace ns3 { |
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/** |
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* \brief a registry of all existing tag types. |
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* \internal |
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* |
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* This class is used to give polymorphic access to the methods |
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* exported by a tag. It also is used to associate a single |
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* reliable uid to each unique type. |
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*/ |
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class TagRegistry |
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{ |
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public: |
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template <typename T> |
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static uint32_t Register (std::string uidString); |
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static std::string GetUidString (uint32_t uid); |
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static uint32_t GetUidFromUidString (std::string uidString); |
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static void Destruct (uint32_t uid, uint8_t data[Tags::SIZE]); |
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static void Print (uint32_t uid, uint8_t data[Tags::SIZE], std::ostream &os); |
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static uint32_t GetSerializedSize (uint32_t uid, uint8_t data[Tags::SIZE]); |
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static void Serialize (uint32_t uid, uint8_t data[Tags::SIZE], Buffer::Iterator start); |
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static uint32_t Deserialize (uint32_t uid, uint8_t data[Tags::SIZE], Buffer::Iterator start); |
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private: |
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typedef void (*DestructCb) (uint8_t [Tags::SIZE]); |
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typedef void (*PrintCb) (uint8_t [Tags::SIZE], std::ostream &); |
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typedef uint32_t (*GetSerializedSizeCb) (uint8_t [Tags::SIZE]); |
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typedef void (*SerializeCb) (uint8_t [Tags::SIZE], Buffer::Iterator); |
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typedef uint32_t (*DeserializeCb) (uint8_t [Tags::SIZE], Buffer::Iterator); |
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struct TagInfo |
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{ |
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std::string uidString; |
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DestructCb destruct; |
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PrintCb print; |
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GetSerializedSizeCb getSerializedSize; |
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SerializeCb serialize; |
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DeserializeCb deserialize; |
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}; |
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typedef std::vector<struct TagInfo> TagInfoVector; |
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|
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template <typename T> |
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static void DoDestruct (uint8_t data[Tags::SIZE]); |
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template <typename T> |
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static void DoPrint (uint8_t data[Tags::SIZE], std::ostream &os); |
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template <typename T> |
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static uint32_t DoGetSerializedSize (uint8_t data[Tags::SIZE]); |
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template <typename T> |
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static void DoSerialize (uint8_t data[Tags::SIZE], Buffer::Iterator start); |
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template <typename T> |
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static uint32_t DoDeserialize (uint8_t data[Tags::SIZE], Buffer::Iterator start); |
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static TagInfoVector *GetInfo (void); |
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}; |
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template <typename T> |
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void |
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TagRegistry::DoDestruct (uint8_t data[Tags::SIZE]) |
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{ |
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T *tag = reinterpret_cast<T *> (data); |
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tag->~T (); |
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} |
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template <typename T> |
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void |
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TagRegistry::DoPrint (uint8_t data[Tags::SIZE], std::ostream &os) |
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{ |
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T *tag = reinterpret_cast<T *> (data); |
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tag->Print (os); |
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} |
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template <typename T> |
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uint32_t |
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TagRegistry::DoGetSerializedSize (uint8_t data[Tags::SIZE]) |
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{ |
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T *tag = reinterpret_cast<T *> (data); |
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return tag->GetSerializedSize (); |
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} |
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template <typename T> |
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void |
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TagRegistry::DoSerialize (uint8_t data[Tags::SIZE], Buffer::Iterator start) |
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{ |
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T *tag = reinterpret_cast<T *> (data); |
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tag->Serialize (start); |
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} |
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template <typename T> |
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uint32_t |
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TagRegistry::DoDeserialize (uint8_t data[Tags::SIZE], Buffer::Iterator start) |
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{ |
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T *tag = reinterpret_cast<T *> (data); |
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return tag->Deserialize (start); |
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} |
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template <typename T> |
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uint32_t |
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TagRegistry::Register (std::string uidString) |
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{ |
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TagInfoVector *vec = GetInfo (); |
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uint32_t j = 0; |
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for (TagInfoVector::iterator i = vec->begin (); i != vec->end (); i++) |
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{ |
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if (i->uidString == uidString) |
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{ |
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return j; |
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} |
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j++; |
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} |
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TagInfo info; |
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info.uidString = uidString; |
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info.destruct = &TagRegistry::DoDestruct<T>; |
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info.print = &TagRegistry::DoPrint<T>; |
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info.getSerializedSize = &TagRegistry::DoGetSerializedSize<T>; |
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info.serialize = &TagRegistry::DoSerialize<T>; |
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info.deserialize = &TagRegistry::DoDeserialize<T>; |
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vec->push_back (info); |
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uint32_t uid = vec->size (); |
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return uid; |
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} |
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|
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template <typename T> |
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void |
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Tags::Add (T const&tag) |
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{ |
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NS_ASSERT (sizeof (T) <= Tags::SIZE); |
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// ensure this id was not yet added |
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for (struct TagData *cur = m_next; cur != 0; cur = cur->m_next) |
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{ |
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NS_ASSERT (cur->m_id != T::GetUid ()); |
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} |
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struct TagData *newStart = AllocData (); |
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newStart->m_count = 1; |
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newStart->m_next = 0; |
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newStart->m_id = T::GetUid (); |
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void *buf = &newStart->m_data; |
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new (buf) T (tag); |
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newStart->m_next = m_next; |
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m_next = newStart; |
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} |
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254 |
|
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255 |
template <typename T> |
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bool |
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Tags::Remove (T &tag) |
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{ |
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NS_ASSERT (sizeof (T) <= Tags::SIZE); |
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return Remove (T::GetUid ()); |
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261 |
} |
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262 |
|
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263 |
template <typename T> |
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bool |
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Tags::Peek (T &tag) const |
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{ |
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NS_ASSERT (sizeof (T) <= Tags::SIZE); |
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for (struct TagData *cur = m_next; cur != 0; cur = cur->m_next) |
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269 |
{ |
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if (cur->m_id == T::GetUid ()) |
150
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271 |
{ |
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/* found tag */ |
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273 |
T *data = reinterpret_cast<T *> (&cur->m_data); |
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274 |
tag = T (*data); |
150
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return true; |
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276 |
} |
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277 |
} |
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278 |
/* no tag found */ |
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279 |
return false; |
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280 |
} |
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281 |
|
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282 |
Tags::Tags () |
150
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283 |
: m_next () |
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284 |
{} |
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285 |
|
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286 |
Tags::Tags (Tags const &o) |
150
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287 |
: m_next (o.m_next) |
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288 |
{ |
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289 |
if (m_next != 0) |
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|
290 |
{ |
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291 |
m_next->m_count++; |
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292 |
} |
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293 |
} |
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294 |
|
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|
295 |
Tags & |
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296 |
Tags::operator = (Tags const &o) |
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297 |
{ |
150
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|
298 |
// self assignment |
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|
299 |
if (m_next == o.m_next) |
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|
300 |
{ |
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|
301 |
return *this; |
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|
302 |
} |
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|
303 |
RemoveAll (); |
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|
304 |
m_next = o.m_next; |
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|
305 |
if (m_next != 0) |
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|
306 |
{ |
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|
307 |
m_next->m_count++; |
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|
308 |
} |
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|
309 |
return *this; |
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310 |
} |
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|
311 |
|
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|
312 |
Tags::~Tags () |
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|
313 |
{ |
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|
314 |
RemoveAll (); |
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|
315 |
} |
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|
316 |
|
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317 |
void |
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318 |
Tags::RemoveAll (void) |
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319 |
{ |
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|
320 |
struct TagData *prev = 0; |
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|
321 |
for (struct TagData *cur = m_next; cur != 0; cur = cur->m_next) |
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|
322 |
{ |
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|
323 |
cur->m_count--; |
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|
324 |
if (cur->m_count > 0) |
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|
325 |
{ |
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|
326 |
break; |
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|
327 |
} |
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|
328 |
if (prev != 0) |
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|
329 |
{ |
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|
330 |
TagRegistry::Destruct (prev->m_id, prev->m_data); |
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|
331 |
FreeData (prev); |
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|
332 |
} |
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|
333 |
prev = cur; |
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|
334 |
} |
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|
335 |
if (prev != 0) |
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|
336 |
{ |
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337 |
TagRegistry::Destruct (prev->m_id, prev->m_data); |
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|
338 |
FreeData (prev); |
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|
339 |
} |
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|
340 |
m_next = 0; |
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|
341 |
} |
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|
342 |
|
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|
343 |
|
16
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|
344 |
}; // namespace ns3 |
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|
345 |
|
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346 |
#endif /* TAGS_H */ |