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source: code/branches/kicklib/src/libraries/network/synchronisable/Synchronisable.cc @ 7957

Last change on this file since 7957 was 7801, checked in by dafrick, 14 years ago

Merging presentation2 branch back to trunk.

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1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Dumeni Manatschal, (C) 2007
24 *      Oliver Scheuss, (C) 2007
25 *   Co-authors:
26 *      ...
27 *
28 */
29
30
31#include "Synchronisable.h"
32
33#include <cstdlib>
34#include "core/CoreIncludes.h"
35#include "core/GameMode.h"
36#include "core/BaseObject.h"
37#include "network/Host.h"
38
39namespace orxonox
40{
41
42  std::map<uint32_t, Synchronisable *> Synchronisable::objectMap_;
43  std::queue<uint32_t> Synchronisable::deletedObjects_;
44
45  uint8_t Synchronisable::state_=0x1; // detemines wheter we are server (default) or client
46
47  /**
48  * Constructor:
49  * Initializes all Variables and sets the right objectID_
50  */
51  Synchronisable::Synchronisable(BaseObject* creator )
52  {
53    RegisterRootObject(Synchronisable);
54    static uint32_t idCounter=0;
55    objectMode_=0x1; // by default do not send data to server
56    if ( GameMode::isMaster()/* || ( Host::running() && Host::isServer() )*/ )
57    {
58      this->setObjectID( idCounter++ );
59    }
60    else
61    {
62      objectID_=OBJECTID_UNKNOWN;
63    }
64    classID_ = static_cast<uint32_t>(-1);
65
66    // set dataSize to 0
67    this->dataSize_ = 0;
68    // set standard priority
69    this->setPriority( Priority::Normal );
70
71    // get creator id
72    if( creator )
73      this->creatorID_ = creator->getSceneID();
74    else
75      this->creatorID_ = OBJECTID_UNKNOWN;
76  }
77
78  /**
79   * Destructor:
80   * Delete all callback objects and remove objectID_ from the objectMap_
81   */
82  Synchronisable::~Synchronisable()
83  {
84    // delete callback function objects
85    if(!Identifier::isCreatingHierarchy()){
86      // remove object from the static objectMap
87      if (this->objectMode_ != 0x0 && (Host::running() && Host::isServer()))
88        deletedObjects_.push(objectID_);
89    }
90    // delete all Synchronisable Variables from syncList_ ( which are also in stringList_ )
91    for(std::vector<SynchronisableVariableBase*>::iterator it = syncList_.begin(); it!=syncList_.end(); it++)
92      delete (*it);
93    syncList_.clear();
94    stringList_.clear();
95    std::map<uint32_t, Synchronisable*>::iterator it2;
96    it2 = objectMap_.find(objectID_);
97    if (it2 != objectMap_.end())
98      objectMap_.erase(it2);
99
100  }
101
102
103  /**
104   * This function sets the internal mode for synchronisation
105   * @param b true if this object is located on a client or on a server
106   */
107  void Synchronisable::setClient(bool b)
108  {
109    if(b) // client
110      state_=0x2;
111    else  // server
112      state_=0x1;
113  }
114
115  /**
116   * This function fabricated a new synchrnisable (and children of it), sets calls updateData and create
117   * After calling this function the mem pointer will be increased by the size of the needed data
118   * @param mem pointer to where the appropriate data is located
119   * @param mode defines the mode, how the data should be loaded
120   * @return pointer to the newly created synchronisable
121   */
122  Synchronisable *Synchronisable::fabricate(uint8_t*& mem, uint8_t mode)
123  {
124    SynchronisableHeader header(mem);
125    if( header.isDiffed() )
126    {
127      mem += header.getDataSize() + header.getSize();
128      return 0;
129    }
130//     assert( !header.isDiffed() );
131
132    COUT(4) << "fabricating object with id: " << header.getObjectID() << std::endl;
133
134    Identifier* id = ClassByID(header.getClassID());
135    if (!id)
136    {
137        for(int i = 0; i<160; i++)
138            COUT(0) << "classid: " << i << " identifier: " << ClassByID(i) << endl;
139        COUT(0) << "Assertion failed: id" << std::endl;
140        COUT(0) << "Possible reason for this error: Client received a synchronizable object whose class has no factory." << std::endl;
141        abort();
142    }
143    assert(id);
144    BaseObject* creator = 0;
145    if (header.getCreatorID() != OBJECTID_UNKNOWN)
146    {
147      Synchronisable* synchronisable_creator = Synchronisable::getSynchronisable(header.getCreatorID());
148      if (!synchronisable_creator)
149      {
150        mem += header.getDataSize()+SynchronisableHeader::getSize(); //.TODO: this suckz.... remove size from header
151        assert(0); // TODO: uncomment this if we have a clean objecthierarchy (with destruction of children of objects) ^^
152        return 0;
153      }
154      else
155        creator = orxonox_cast<BaseObject*>(synchronisable_creator);
156    }
157    assert(getSynchronisable(header.getObjectID())==0);   //make sure no object with this id exists
158    BaseObject *bo = id->fabricate(creator);
159    assert(bo);
160    Synchronisable *no = orxonox_cast<Synchronisable*>(bo);
161    assert(no);
162    assert( Synchronisable::objectMap_.find(header.getObjectID()) == Synchronisable::objectMap_.end() );
163    no->setObjectID(header.getObjectID());
164    //no->creatorID=header.getCreatorID(); //TODO: remove this
165    no->setClassID(header.getClassID());
166    assert(no->creatorID_ == header.getCreatorID());
167    if( creator )
168      bo->setLevel(creator->getLevel());          // Note: this ensures that the level is known on the client for child objects of the scene (and the scene itself)
169    //assert(no->classID_ == header.getClassID());
170    COUT(4) << "fabricate objectID_: " << no->objectID_ << " classID_: " << no->classID_ << std::endl;
171          // update data and create object/entity...
172    bool b = no->updateData(mem, mode, true);
173    assert(b);
174    if (b)
175    {
176//        b = no->create();
177        assert(b);
178    }
179    return no;
180  }
181
182
183  /**
184   * Finds and deletes the Synchronisable with the appropriate objectID_
185   * @param objectID_ objectID_ of the Synchronisable
186   * @return true/false
187   */
188  bool Synchronisable::deleteObject(uint32_t objectID_)
189  {
190    if(!getSynchronisable(objectID_))
191      return false;
192    assert(getSynchronisable(objectID_)->objectID_==objectID_);
193    Synchronisable *s = getSynchronisable(objectID_);
194    if(s)
195      s->destroy(); // or delete?
196    else
197      return false;
198    return true;
199  }
200
201  /**
202   * This function looks up the objectID_ in the objectMap_ and returns a pointer to the right Synchronisable
203   * @param objectID_ objectID_ of the Synchronisable
204   * @return pointer to the Synchronisable with the objectID_
205   */
206  Synchronisable* Synchronisable::getSynchronisable(uint32_t objectID_)
207  {
208    std::map<uint32_t, Synchronisable*>::iterator it1;
209    it1 = objectMap_.find(objectID_);
210    if (it1 != objectMap_.end())
211      return it1->second;
212    // if the objects not in the map it should'nt exist at all anymore
213    return NULL;
214  }
215
216
217  /**
218   * This function takes all SynchronisableVariables out of the Synchronisable and saves them together with the size, objectID_ and classID_ to the given memory
219   * takes a pointer to already allocated memory (must have at least getSize bytes length)
220   * structure of the bitstream:
221   * |totalsize,objectID_,classID_,var1,var2,string1_length,string1,var3,...|
222   * length of varx: size saved int syncvarlist
223   * @param mem pointer to allocated memory with enough size
224   * @param sizes vector containing sizes of all objects in gamestate (to be appended)
225   * @param id gamestateid of the gamestate to be saved (important for priorities)
226   * @param mode defines the direction in which the data will be send/received
227   *             0x1: server->client
228   *             0x2: client->server
229   *             0x3: bidirectional
230   * @return true: if !doSync or if everything was successfully saved
231   */
232  uint32_t Synchronisable::getData(uint8_t*& mem, std::vector<uint32_t>& sizes, int32_t id, uint8_t mode)
233  {
234    unsigned int test = 0;
235    if(mode==0x0)
236      mode=state_;
237    //if this tick is we dont synchronise, then abort now
238    if(!doSync(id, mode))
239      return 0;
240    uint32_t tempsize = 0;
241#ifndef NDEBUG
242    uint8_t* oldmem = mem;
243    if (this->classID_==0)
244      COUT(3) << "classid 0 " << this->getIdentifier()->getName() << std::endl;
245#endif
246
247    if (this->classID_ == static_cast<uint32_t>(-1))
248        this->classID_ = this->getIdentifier()->getNetworkID();
249
250    assert(ClassByID(this->classID_));
251    assert(this->classID_==this->getIdentifier()->getNetworkID());
252    assert(this->objectID_!=OBJECTID_UNKNOWN);
253    std::vector<SynchronisableVariableBase*>::iterator i;
254
255    // start copy header
256    SynchronisableHeader header(mem);
257    mem += SynchronisableHeader::getSize();
258    // end copy header
259
260    CCOUT(5) << "getting data from objectID_: " << objectID_ << ", classID_: " << classID_ << std::endl;
261//     COUT(4) << "objectid: " << this->objectID_ << ":";
262    // copy to location
263    for(i=syncList_.begin(); i!=syncList_.end(); ++i)
264    {
265      uint32_t varsize = (*i)->getData( mem, mode );
266//       COUT(4) << " " << varsize;
267      tempsize += varsize;
268      sizes.push_back(varsize);
269      ++test;
270      //tempsize += (*i)->getSize( mode );
271    }
272    assert(tempsize!=0);  // if this happens an empty object (with no variables) would be transmitted
273//     COUT(4) << endl;
274
275    header.setObjectID( this->objectID_ );
276    header.setCreatorID( this->creatorID_ );
277    header.setClassID( this->classID_ );
278    header.setDataSize( tempsize );
279    assert( tempsize == mem-oldmem-SynchronisableHeader::getSize() );
280    assert( test == this->getNrOfVariables() );
281    header.setDiffed(false);
282    tempsize += SynchronisableHeader::getSize();
283
284#ifndef NDEBUG
285    uint32_t size;
286    size=getSize(id, mode);
287    assert(tempsize==size);
288#endif
289    return tempsize;
290  }
291
292
293  /**
294   * This function takes a bytestream and loads the data into the registered variables
295   * @param mem pointer to the bytestream
296   * @param mode same as in getData
297   * @param forceCallback FIXME - add doc!
298   * @return true/false
299   */
300  bool Synchronisable::updateData(uint8_t*& mem, uint8_t mode, bool forceCallback)
301  {
302    if(mode==0x0)
303      mode=state_;
304    if(syncList_.empty())
305    {
306      assert(0);
307      COUT(2) << "Synchronisable::updateData syncList_ is empty" << std::endl;
308      return false;
309    }
310
311    uint8_t* data=mem;
312    // start extract header
313    SynchronisableHeaderLight syncHeaderLight(mem);
314    assert(syncHeaderLight.getObjectID()==this->getObjectID());
315
316    //COUT(5) << "Synchronisable: objectID_ " << syncHeader.getObjectID() << ", classID_ " << syncHeader.getClassID() << " size: " << syncHeader.getDataSize() << " synchronising data" << std::endl;
317    if( !syncHeaderLight.isDiffed() )
318    {
319      SynchronisableHeader syncHeader2(mem);
320      assert( this->getClassID() == syncHeader2.getClassID() );
321      assert( this->getCreatorID() == syncHeader2.getCreatorID() );
322      mem += SynchronisableHeader::getSize();
323      std::vector<SynchronisableVariableBase *>::iterator i;
324      for(i=syncList_.begin(); i!=syncList_.end(); ++i)
325      {
326        assert( mem <= data+syncHeader2.getDataSize()+SynchronisableHeader::getSize() ); // always make sure we don't exceed the datasize in our stream
327        (*i)->putData( mem, mode, forceCallback );
328      }
329      assert(mem == data+syncHeaderLight.getDataSize()+SynchronisableHeader::getSize() );
330    }
331    else
332    {
333      mem += SynchronisableHeaderLight::getSize();
334//       COUT(0) << "objectID: " << this->objectID_ << endl;
335      while( mem < data+syncHeaderLight.getDataSize()+SynchronisableHeaderLight::getSize() )
336      {
337        VariableID varID = *(VariableID*)mem;
338//         COUT(0) << "varID: " << varID << endl;
339        assert( varID < syncList_.size() );
340        mem += sizeof(VariableID);
341        syncList_[varID]->putData( mem, mode, forceCallback );
342      }
343      assert(mem == data+syncHeaderLight.getDataSize()+SynchronisableHeaderLight::getSize() );
344    }
345    return true;
346  }
347
348  /**
349  * This function returns the total amount of bytes needed by getData to save the whole content of the variables
350  * @param id id of the gamestate
351  * @param mode same as getData
352  * @return amount of bytes
353  */
354  uint32_t Synchronisable::getSize(int32_t id, uint8_t mode)
355  {
356    uint32_t tsize=SynchronisableHeader::getSize();
357    if (mode==0x0)
358      mode=state_;
359    if (!doSync(id, mode))
360      return 0;
361    assert( mode==state_ );
362    tsize += this->dataSize_;
363    std::vector<SynchronisableVariableBase*>::iterator i;
364    for(i=stringList_.begin(); i!=stringList_.end(); ++i)
365    {
366      tsize += (*i)->getSize( mode );
367    }
368    return tsize;
369  }
370
371  /**
372   * This function determines, wheter the object should be saved to the bytestream (according to its syncmode/direction)
373   * @param id gamestate id
374   * @param mode FIXME - add doc!
375   * @return true/false
376   */
377  bool Synchronisable::doSync(int32_t id, uint8_t mode)
378  {
379    if(mode==0x0)
380      mode=state_;
381    return ( (this->objectMode_ & mode)!=0 && (!syncList_.empty() ) );
382  }
383
384  /**
385   * This function sets the synchronisation mode of the object
386   * If set to 0x0 variables will not be synchronised at all
387   * If set to 0x1 variables will only be synchronised to the client
388   * If set to 0x2 variables will only be synchronised to the server
389   * If set to 0x3 variables will be synchronised bidirectionally (only if set so in registerVar)
390   * @param mode same as in registerVar
391   */
392  void Synchronisable::setSyncMode(uint8_t mode)
393  {
394    assert(mode==0x0 || mode==0x1 || mode==0x2 || mode==0x3);
395    this->objectMode_=mode;
396  }
397
398  template <> void Synchronisable::registerVariable( std::string& variable, uint8_t mode, NetworkCallbackBase *cb, bool bidirectional)
399  {
400    SynchronisableVariableBase* sv;
401    if (bidirectional)
402      sv = new SynchronisableVariableBidirectional<std::string>(variable, mode, cb);
403    else
404      sv = new SynchronisableVariable<std::string>(variable, mode, cb);
405    syncList_.push_back(sv);
406    stringList_.push_back(sv);
407  }
408
409template <> void Synchronisable::unregisterVariable( std::string& variable )
410  {
411    bool unregistered_nonexistent_variable = true;
412    std::vector<SynchronisableVariableBase*>::iterator it = syncList_.begin();
413    while(it!=syncList_.end())
414    {
415      if( ((*it)->getReference()) == &variable )
416      {
417        delete (*it);
418        syncList_.erase(it);
419        unregistered_nonexistent_variable = false;
420        break;
421      }
422      else
423        ++it;
424    }
425    assert(unregistered_nonexistent_variable == false);
426   
427    it = stringList_.begin();
428    while(it!=stringList_.end())
429    {
430      if( ((*it)->getReference()) == &variable )
431      {
432        delete (*it);
433        stringList_.erase(it);
434        return;
435      }
436      else
437        ++it;
438    }
439    unregistered_nonexistent_variable = true;
440    assert(unregistered_nonexistent_variable == false); //if we reach this point something went wrong:
441    // the variable has not been registered before
442  }
443
444
445}
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