src/engine/Executor.cxx

   1 // Copyright (C) 2006-2015  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 #include "Executor.hxx"
  21 #include "Task.hxx"
  22 #include "AutoLocker.hxx"
  23 #include "Scheduler.hxx"
  24 #include "Dispatcher.hxx"
  25 #include "Container.hxx"
  26 #include "HomogeneousPoolContainer.hxx"
  27 #include "ComponentInstance.hxx"
  28
  29 #include "VisitorSaveState.hxx"
  30 #include "ServiceNode.hxx"
  31 #include "ComposedNode.hxx"
  32
  33 #include <iostream>
  34 #include <fstream>
  35 #include <sys/stat.h>
  36 #ifndef WIN32
  37 #include <sys/time.h>
  38 #include <unistd.h>
  39 #endif
  40
  41 #include <cstdlib>
  42 #include <algorithm>
  43
  44 #ifdef WIN32
  45 #define usleep(A) _sleep(A/1000)
  46 #if !defined(S_ISCHR) || !defined(S_ISREG)
  47 #  ifndef S_IFMT
  48 #    ifdef _S_IFMT
  49 #      define S_IFMT _S_IFMT
  50 #      define S_IFCHR _S_IFCHR
  51 #      define S_IFREG _S_IFREG
  52 #    else
  53 #    ifdef __S_IFMT
  54 #      define S_IFMT __S_IFMT
  55 #      define S_IFCHR __S_IFCHR
  56 #      define S_IFREG __S_IFREG
  57 #    endif
  58 #    endif
  59 #  endif
  60 #  define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
  61 #  define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
  62 #endif
  63 #endif
  64
  65 using namespace YACS::ENGINE;
  66 using namespace std;
  67
  68 using YACS::BASES::Mutex;
  69 using YACS::BASES::Thread;
  70 using YACS::BASES::Semaphore;
  71
  72 //#define _DEVDEBUG_
  73 #include "YacsTrace.hxx"
  74
  75 int Executor::_maxThreads(50);
  76 size_t Executor::_threadStackSize(1048576); // Default thread stack size is 1MB
  77
  78 Executor::Executor():_nbOfConcurrentThreads(0), _semForMaxThreads(_maxThreads),_keepGoingOnFail(false)
  79 {
  80   _root=0;
  81   _toContinue = true;
  82   _isOKToEnd = false;
  83   _stopOnErrorRequested = false;
  84   _dumpOnErrorRequested = false;
  85   _errorDetected = false;
  86   _isRunningunderExternalControl=false;
  87   _executorState = YACS::NOTYETINITIALIZED;
  88   _execMode = YACS::CONTINUE;
  89   _semThreadCnt = _maxThreads;
  90   DEBTRACE("Executor initialized with max threads = " << _maxThreads);
  91 }
  92
  93 Executor::~Executor()
  94 {
  95   for(list<Thread *>::iterator iter=_groupOfAllThreadsCreated.begin();iter!=_groupOfAllThreadsCreated.end();iter++)
  96     delete *iter;
  97 }
  98
  99 //! Execute a graph waiting for completion
 100 /*!
 101  *  \param graph : schema to execute
 102  *  \param debug : display the graph with dot if debug == 1
 103  *  \param fromScratch : if true the graph is reinitialized
 104  *
 105  *  Calls Scheduler::getNextTasks and Scheduler::selectRunnableTasks to select tasks to execute
 106  *
 107  *  Calls Executor::launchTask to execute a selected Task.
 108  *
 109  *  Completion when graph is finished (Scheduler::isFinished)
 110  */
 111
 112 void Executor::RunA(Scheduler *graph,int debug, bool fromScratch)
 113 {
 114   DEBTRACE("Executor::RunW debug: " << debug << " fromScratch: " << fromScratch);
 115   _mainSched=graph;
 116   _root = dynamic_cast<ComposedNode *>(_mainSched);
 117   if (!_root) throw Exception("Executor::Run, Internal Error!");
 118   bool isMore;
 119   int i=0;
 120   if(debug>1)_displayDot(graph);
 121   if (fromScratch)
 122     {
 123       graph->init();
 124       graph->exUpdateState();
 125     }
 126   if(debug>1)_displayDot(graph);
 127   vector<Task *> tasks;
 128   vector<Task *>::iterator iter;
 129   _toContinue=true;
 130   _execMode = YACS::CONTINUE;
 131   _isWaitingEventsFromRunningTasks = false;
 132   _numberOfRunningTasks = 0;
 133   _runningTasks.clear();
 134   _numberOfEndedTasks=0;
 135   while(_toContinue)
 136     {
 137       sleepWhileNoEventsFromAnyRunningTask();
 138
 139       if(debug>2)_displayDot(graph);
 140
 141       {//Critical section
 142         YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 143         tasks=graph->getNextTasks(isMore);
 144         graph->selectRunnableTasks(tasks);
 145       }//End of critical section
 146
 147       if(debug>2)_displayDot(graph);
 148
 149       for(iter=tasks.begin();iter!=tasks.end();iter++)
 150         loadTask(*iter,this);
 151
 152       if(debug>1)_displayDot(graph);
 153
 154       launchTasks(tasks);
 155
 156       if(debug>1)_displayDot(graph);
 157
 158       {//Critical section
 159         YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 160         _toContinue=!graph->isFinished();
 161       }//End of critical section
 162       DEBTRACE("_toContinue: " << _toContinue);
 163
 164       if(debug>0)_displayDot(graph);
 165
 166       i++;
 167     }
 168 }
 169
 170 //! Execute a graph with breakpoints or step by step
 171 /*!
 172  *  To be launch in a thread (main thread controls the progression).
 173  *  \param graph : schema to execute
 174  *  \param debug : display the graph with dot if debug >0
 175  *  \param fromScratch : if false, state from a previous partial exection is already loaded
 176  *
 177  *  Calls Scheduler::getNextTasks and Scheduler::selectRunnableTasks to select tasks to execute
 178  *
 179  *  Calls Executor::checkBreakPoints to verify if a pause is requested
 180  *
 181  *  Calls Executor::launchTask to execute a selected Task
 182  *
 183  *  Completion when graph is finished (Scheduler::isFinished)
 184  *
 185  *  States of execution:
 186  *  - YACS::NOTYETINITIALIZED
 187  *  - YACS::INITIALISED
 188  *  - YACS::RUNNING            (to next breakpoint or step)
 189  *  - YACS::WAITINGTASKS       (a breakpoint or step as been reached, but there are still running tasks)
 190  *  - YACS::PAUSED             (a breakpoint or step as been reached, no more running tasks)
 191  *  - YACS::FINISHED           (no more ready tasks, nore running tasks)
 192  *  - YACS::STOPPED            (stopped by user before end)
 193  *
 194  *  Modes of Execution:
 195  *  - YACS::CONTINUE           (normal run without breakpoints)
 196  *  - YACS::STEPBYSTEP         (pause at each loop)
 197  *  - YACS::STOPBEFORENODES    (pause when a node is reached)
 198  *
 199  *  A breakpoint is defined by a node name. The breakpoint is reached when the node becomes ready.
 200  *  Step by Step means execution node by node or group of node by group of nodes.
 201  *  At a given step, the user decides to launch all the ready nodes or only a subset
 202  *  (Caution: some nodes must run in parallel).
 203  *  The next event (end of task) may give a new set of ready nodes, and define a new step.
 204  *
 205  *  The graph execution may be controled by a pilot which sends requests. Requests are asynchronous.
 206  *  Requests are taken into account only on certain states, otherwise return the status IgnoredRequest.
 207  *  - Executor::getCurrentExecMode
 208  *  - Executor::getExecutorState
 209  *  - Executor::setExecMode             : change the execution mode for next loop
 210  *  - Executor::setListOfBreakPoints    : must be set before setting YACS::STOPBEFORENODES
 211  *  - Executor::getTasksToLoad          : when paused or waiting tasks, get the list of next tasks
 212  *  - Executor::setStepsToExecute       : define a subset of the list given by Executor::getTasksToLoad
 213  *  - Executor::resumeCurrentBreakPoint : when paused or waiting tasks, resumes execution
 214  *  - Executor::isNotFinished
 215  *  - Executor::stopExecution           : stop execution asap, i.e. set STEPBYSTEP and wait PAUSED
 216  *  - Executor::saveState               : dump the current state of execution in an xml file
 217  *  - Executor::loadState               : Not yet implemented
 218  *  - Executor::getNbOfThreads
 219  *  - Executor::displayDot
 220  *  - Executor::setStopOnError          : ask to stop execution if a node is found in ERROR state
 221  *
 222  *  If the pilot wants to wait the state YACS::PAUSED or YACS::WAITINGTASKS, synchronisation is obtained with:
 223  *  - Executor::waitPause
 224  *
 225  *  TO BE VALIDATED:
 226  *  - Pilot may connect to executor during execution, or deconnect.
 227  *  - Several Pilots may be connected at the same time (for observation...)
 228  *
 229  */
 230
 231 void Executor::RunB(Scheduler *graph,int debug, bool fromScratch)
 232 {
 233   DEBTRACE("Executor::RunB debug: "<< graph->getName() <<" "<< debug<<" fromScratch: "<<fromScratch);
 234
 235   { // --- Critical section
 236     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 237     _mainSched = graph;
 238     _root = dynamic_cast<ComposedNode *>(_mainSched);
 239     if (!_root) throw Exception("Executor::Run, Internal Error!");
 240     _executorState = YACS::NOTYETINITIALIZED;
 241     sendEvent("executor");
 242     _toContinue=true;
 243     _isOKToEnd = false;
 244     _errorDetected = false;
 245     _isWaitingEventsFromRunningTasks = false;
 246     _numberOfRunningTasks = 0;
 247     _runningTasks.clear();
 248     _numberOfEndedTasks = 0;
 249     string tracefile = "traceExec_";
 250     tracefile += _mainSched->getName();
 251     _trace.open(tracefile.c_str());
 252 #ifdef WIN32
 253    _start = timeGetTime();
 254 #else
 255     gettimeofday(&_start, NULL);
 256 #endif
 257
 258   } // --- End of critical section
 259
 260   if (debug > 1) _displayDot(graph);
 261
 262   if (fromScratch)
 263     {
 264       try
 265         {
 266           graph->init();
 267           graph->exUpdateState();
 268         }
 269       catch(Exception& ex)
 270         {
 271           DEBTRACE("exception: "<< (ex.what()));
 272           _executorState = YACS::FINISHED;
 273           sendEvent("executor");
 274           throw;
 275         }
 276     }
 277   _executorState = YACS::INITIALISED;
 278   sendEvent("executor");
 279
 280   if (debug > 1) _displayDot(graph);
 281
 282   vector<Task *>::iterator iter;
 283   bool isMore;
 284   int problemCount=0;
 285   int numberAllTasks;
 286
 287   _executorState = YACS::RUNNING;
 288   sendEvent("executor");
 289   while (_toContinue)
 290     {
 291       DEBTRACE("--- executor main loop");
 292       sleepWhileNoEventsFromAnyRunningTask();
 293       DEBTRACE("--- events...");
 294       if (debug > 2) _displayDot(graph);
 295       { // --- Critical section
 296         YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 297         _tasks=graph->getNextTasks(isMore);
 298         numberAllTasks=_numberOfRunningTasks+_tasks.size();
 299         graph->selectRunnableTasks(_tasks);
 300         FilterTasksConsideringContainers(_tasks);
 301       } // --- End of critical section
 302       if (debug > 2) _displayDot(graph);
 303       if (_executorState == YACS::RUNNING)
 304         {
 305           if (checkBreakPoints()) break; // end of thread requested, OK to exit at once;
 306           if (debug > 0) _displayDot(graph);
 307           DEBTRACE("---");
 308           //loadTasks(_tasks);
 309           loadParallelTasks(_tasks,this);
 310           if (debug > 1) _displayDot(graph);
 311           DEBTRACE("---");
 312           launchTasks(_tasks);
 313           DEBTRACE("---");
 314         }
 315       if (debug > 1) _displayDot(graph);
 316       { // --- Critical section
 317         DEBTRACE("---");
 318         YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 319         //It is possible that the graph is finished but it remains running tasks (it's an error but we must take it into account)
 320         if(_numberOfRunningTasks == 0)
 321           _toContinue = !graph->isFinished();
 322
 323         DEBTRACE("_numberOfRunningTasks: " << _numberOfRunningTasks);
 324         DEBTRACE("_numberOfEndedTasks: " << _numberOfEndedTasks);
 325         DEBTRACE("_toContinue: " << _toContinue);
 326         if(_toContinue && numberAllTasks==0)
 327           {
 328             //Problem : no running tasks and no task to launch ??
 329             problemCount++;
 330             std::cerr << "Problem in Executor : no running tasks and no task to launch ?? problemCount=" << problemCount << std::endl;
 331             //Pause to give a chance to interrupt
 332             usleep(1000);
 333             if(problemCount > 25)
 334               {
 335                 // Too much problems encountered : stop execution
 336                 _toContinue=false;
 337               }
 338           }
 339
 340         if (! _toContinue)
 341           {
 342             _executorState = YACS::FINISHED;
 343             sendEvent("executor");
 344             _condForPilot.notify_all();
 345           }
 346       } // --- End of critical section
 347       if (debug > 0) _displayDot(graph);
 348       DEBTRACE("_toContinue: " << _toContinue);
 349     }
 350
 351   DEBTRACE("End of main Loop");
 352
 353   { // --- Critical section
 354     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 355     if ( _toContinue) // --- break while(): request to stop detected on checkBreakPoints()
 356       {
 357         DEBTRACE("stop requested: End soon");
 358         _executorState = YACS::STOPPED;
 359         _toContinue = false;
 360         sendEvent("executor");
 361       }
 362   } // --- End of critical section
 363   if ( _dumpOnErrorRequested && _errorDetected)
 364     {
 365       saveState(_dumpErrorFile);
 366     }
 367   {
 368     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForTrace);
 369     _trace.close();
 370   }
 371   DEBTRACE("End of RunB thread");
 372 }
 373
 374 YACS::ExecutionMode Executor::getCurrentExecMode()
 375 {
 376   _isRunningunderExternalControl=true;
 377   return _execMode;
 378 }
 379
 380
 381 YACS::ExecutorState Executor::getExecutorState()
 382 {
 383   _isRunningunderExternalControl=true;
 384   return _executorState;
 385 }
 386
 387
 388 bool Executor::isNotFinished()
 389 {
 390   _isRunningunderExternalControl=true;
 391   return _toContinue;
 392 }
 393
 394 //! ask to stop execution on the first node found in error
 395 /*!
 396  * \param dumpRequested   produce a state dump when an error is found
 397  * \param xmlFile         name of file used for state dump
 398  */
 399
 400 void Executor::setStopOnError(bool dumpRequested, std::string xmlFile)
 401 {
 402   { // --- Critical section
 403     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 404     _dumpErrorFile=xmlFile;
 405     _stopOnErrorRequested=true;
 406     _dumpOnErrorRequested = dumpRequested;
 407     if (dumpRequested && xmlFile.empty())
 408       throw YACS::Exception("dump on error requested and no filename given for dump");
 409     DEBTRACE("_dumpErrorFile " << _dumpErrorFile << " " << _dumpOnErrorRequested);
 410   } // --- End of critical section
 411 }
 412
 413 //! ask to do not stop execution on nodes found in error
 414 /*!
 415  */
 416
 417 void Executor::unsetStopOnError()
 418 {
 419   { // --- Critical section
 420     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 421     _stopOnErrorRequested=false;
 422   } // --- End of critical section
 423 }
 424
 425 //! Dynamically set the current mode of execution
 426 /*!
 427  * The mode can be Continue, step by step, or stop before execution of a node
 428  * defined in a list of breakpoints.
 429  */
 430
 431 void Executor::setExecMode(YACS::ExecutionMode mode)
 432 {
 433   DEBTRACE("Executor::setExecMode(YACS::ExecutionMode mode) " << mode);
 434   { // --- Critical section
 435     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 436     _isRunningunderExternalControl=true;
 437     _execMode = mode;
 438   } // --- End of critical section
 439 }
 440
 441 //! wake up executor when in pause
 442 /*!
 443  * When Executor is in state paused or waiting for task completion, the thread
 444  * running loop RunB waits on condition _condForStepByStep.
 445  * Thread RunB is waken up.
 446  * \return true when actually wakes up executor
 447  */
 448
 449 bool Executor::resumeCurrentBreakPoint()
 450 {
 451   DEBTRACE("Executor::resumeCurrentBreakPoint()");
 452   bool ret = false;
 453   //bool doDump = false;
 454   { // --- Critical section
 455     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 456     _isRunningunderExternalControl=true;
 457     DEBTRACE("_executorState: " << _executorState);
 458     switch (_executorState)
 459       {
 460       case YACS::WAITINGTASKS:
 461       case YACS::PAUSED:
 462         {
 463           _condForStepByStep.notify_all();
 464           _executorState = YACS::RUNNING;
 465           sendEvent("executor");
 466           ret = true;
 467           //if (_dumpOnErrorRequested && _errorDetected) doDump =true;
 468           break;
 469         }
 470       case YACS::FINISHED:
 471       case YACS::STOPPED:
 472         {
 473           //if (_dumpOnErrorRequested && _errorDetected) doDump =true;
 474           DEBTRACE("Graph Execution finished or stopped !");
 475           break;
 476         }
 477       default :
 478         {
 479           // debug: no easy way to verify if main loop is acutally waiting on condition
 480         }
 481       }
 482     DEBTRACE("---");
 483     //if (doDump) saveState(_dumpErrorFile);
 484   } // --- End of critical section
 485   return ret;
 486 }
 487
 488
 489 //! define a list of nodes names as breakpoints in the graph
 490
 491
 492 void Executor::setListOfBreakPoints(std::list<std::string> listOfBreakPoints)
 493 {
 494   DEBTRACE("Executor::setListOfBreakPoints(std::list<std::string> listOfBreakPoints)");
 495   { // --- Critical section
 496     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 497     _isRunningunderExternalControl=true;
 498     _listOfBreakPoints = listOfBreakPoints;
 499   } // --- End of critical section
 500 }
 501
 502
 503 //! Get the list of tasks to load, to define a subset to execute in step by step mode
 504 /*!
 505  *  If the executor is not in mode YACS::WAITINGTASKS nor YACS::PAUSED, the list is empty.
 506  *  Use Executor::waitPause to wait.
 507  */
 508 std::list<std::string> Executor::getTasksToLoad()
 509 {
 510   DEBTRACE("Executor::getTasksToLoad()");
 511   list<string> listOfNodesToLoad;
 512   listOfNodesToLoad.clear();
 513   { // --- Critical section
 514     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 515     _isRunningunderExternalControl=true;
 516     switch (_executorState)
 517       {
 518       case YACS::WAITINGTASKS:
 519       case YACS::PAUSED:
 520         {
 521           listOfNodesToLoad = _listOfTasksToLoad;
 522           break;
 523         }
 524       case YACS::NOTYETINITIALIZED:
 525       case YACS::INITIALISED:
 526       case YACS::RUNNING:
 527       case YACS::FINISHED:
 528       case YACS::STOPPED:
 529       default:
 530         {
 531           break;
 532         }
 533       }
 534   } // --- End of critical section
 535   return listOfNodesToLoad;
 536 }
 537
 538
 539 //! Define a subset of task to execute in step by step mode
 540 /*!
 541  * Behaviour is unpredictable if the list is not a subset of the list given by Executor::getTasksToLoad
 542  * in the current step.
 543  * If some nodes must run in parallel, they must stay together in the list.
 544  */
 545
 546 bool Executor::setStepsToExecute(std::list<std::string> listToExecute)
 547 {
 548   DEBTRACE("Executor::setStepsToExecute(std::list<std::string> listToExecute)");
 549   bool ret = true;
 550   vector<Task *>::iterator iter;
 551   vector<Task *> restrictedTasks;
 552   { // --- Critical section
 553     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 554     _isRunningunderExternalControl=true;
 555     switch (_executorState)
 556       {
 557       case YACS::WAITINGTASKS:
 558       case YACS::PAUSED:
 559         {
 560           for (iter=_tasksSave.begin(); iter!=_tasksSave.end(); iter++)
 561             {
 562               string readyNode = _mainSched->getTaskName(*iter);
 563               if (find(listToExecute.begin(), listToExecute.end(), readyNode)
 564                   != listToExecute.end())
 565                 {
 566                   restrictedTasks.push_back(*iter);
 567                   DEBTRACE("node to execute " << readyNode);
 568                 }
 569             }
 570           _tasks.clear();
 571           for (iter=restrictedTasks.begin(); iter!=restrictedTasks.end(); iter++)
 572             {
 573               _tasks.push_back(*iter);
 574             }
 575           break;
 576         }
 577       case YACS::NOTYETINITIALIZED:
 578       case YACS::INITIALISED:
 579       case YACS::RUNNING:
 580       case YACS::FINISHED:
 581       case YACS::STOPPED:
 582       default:
 583         {
 584           break;
 585         }
 586       }
 587     } // --- End of critical section
 588
 589   _tasks.clear();
 590   for (iter=restrictedTasks.begin(); iter!=restrictedTasks.end(); iter++)
 591     {
 592       _tasks.push_back(*iter);
 593     }
 594   for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
 595     {
 596       string readyNode = _mainSched->getTaskName(*iter);
 597       DEBTRACE("selected node to execute " << readyNode);
 598     }
 599
 600   return ret;
 601 }
 602
 603 //! suspend pilot execution until Executor is in pause or waiting tasks completion mode.
 604 /*!
 605  *  Do nothing if execution is finished or in pause.
 606  *  Wait first step if Executor is running or in initialization.
 607  */
 608
 609 void Executor::waitPause()
 610 {
 611   DEBTRACE("Executor::waitPause()" << _executorState);
 612   { // --- Critical section
 613     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 614     _isRunningunderExternalControl=true;
 615     switch (_executorState)
 616       {
 617       default:
 618       case YACS::STOPPED:
 619       case YACS::FINISHED:
 620       case YACS::WAITINGTASKS:
 621       case YACS::PAUSED:
 622         {
 623           break;
 624         }
 625       case YACS::NOTYETINITIALIZED:
 626       case YACS::INITIALISED:
 627       case YACS::RUNNING:
 628         {
 629           _condForPilot.wait(_mutexForSchedulerUpdate); // wait until executor is PAUSED or WAITINGTASKS
 630           break;
 631         }
 632       }
 633   } // --- End of critical section
 634   DEBTRACE("---");
 635 }
 636
 637 //! stops the execution as soon as possible
 638
 639 void Executor::stopExecution()
 640 {
 641   setExecMode(YACS::STEPBYSTEP);
 642   //waitPause();
 643   _isOKToEnd = true;
 644   resumeCurrentBreakPoint();
 645 }
 646
 647 //! save the current state of execution in an xml file
 648
 649 bool Executor::saveState(const std::string& xmlFile)
 650 {
 651   DEBTRACE("Executor::saveState() in " << xmlFile);
 652   YACS::ENGINE::VisitorSaveState vst(_root);
 653   vst.openFileDump(xmlFile.c_str());
 654   _root->accept(&vst);
 655   vst.closeFileDump();
 656   return true;
 657 }
 658
 659 //! not yet implemented
 660
 661 bool Executor::loadState()
 662 {
 663   DEBTRACE("Executor::loadState()");
 664   _isRunningunderExternalControl=true;
 665   return true;
 666 }
 667
 668
 669 static int isfile(const char *filename)
 670 {
 671   struct stat buf;
 672   if (stat(filename, &buf) != 0)
 673     return 0;
 674   if (!S_ISREG(buf.st_mode))
 675     return 0;
 676   return 1;
 677 }
 678
 679 //! Display the graph state as a dot display, public method
 680
 681 void Executor::displayDot(Scheduler *graph)
 682 {
 683   _isRunningunderExternalControl=true;
 684   _displayDot(graph);
 685 }
 686
 687 //! Display the graph state as a dot display
 688 /*!
 689  *  \param graph  : the node to display
 690  */
 691
 692 void Executor::_displayDot(Scheduler *graph)
 693 {
 694    std::ofstream g("titi");
 695    ((ComposedNode*)graph)->writeDot(g);
 696    g.close();
 697    const char displayScript[]="display.sh";
 698    if(isfile(displayScript))
 699      system("sh display.sh");
 700    else
 701      system("dot -Tpng titi|display -delay 5");
 702 }
 703
 704 //! Wait reactivation in modes Step By step or with BreakPoints
 705 /*!
 706  *  Check mode of execution (set by main thread):
 707  *  - YACS::CONTINUE        : the graph execution continues.
 708  *  - YACS::STEPBYSTEP      : wait on condition (pilot thread, Executor::resumeCurrentBreakPoint)
 709  *  - YACS::STOPBEFORENODES : if there are ready nodes in a list of breakpoints,
 710  *                            wait on condition (pilot thread, Executor::resumeCurrentBreakPoint)
 711  *                            else continue the graph execution.
 712  *  \return true if end of executor thread is requested
 713  */
 714
 715 bool Executor::checkBreakPoints()
 716 {
 717   DEBTRACE("Executor::checkBreakPoints()");
 718   vector<Task *>::iterator iter;
 719   bool endRequested = false;
 720
 721   switch (_execMode)
 722     {
 723     case YACS::CONTINUE:
 724       {
 725         break;
 726       }
 727     case YACS::STOPBEFORENODES:
 728       {
 729         bool stop = false;
 730         { // --- Critical section
 731           YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 732           _tasksSave = _tasks;
 733           for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
 734             {
 735               string nodeToLoad = _mainSched->getTaskName(*iter);
 736               if (find(_listOfBreakPoints.begin(), _listOfBreakPoints.end(), nodeToLoad)
 737                   != _listOfBreakPoints.end())
 738                 {
 739                   stop = true;
 740                   break;
 741                 }
 742             }
 743           if (stop)
 744             {
 745               _listOfTasksToLoad.clear();
 746               for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
 747                 {
 748                   string nodeToLoad = _mainSched->getTaskName(*iter);
 749                   _listOfTasksToLoad.push_back(nodeToLoad);
 750                 }
 751               if (getNbOfThreads())
 752                 _executorState = YACS::WAITINGTASKS; // will be paused after completion of running tasks
 753               else
 754                 _executorState = YACS::PAUSED;
 755               sendEvent("executor");
 756               _condForPilot.notify_all();
 757             }
 758           if (stop && !_isOKToEnd) waitResume(); // wait until pilot calls resumeCurrentBreakPoint(), mutex released during wait
 759           if (_isOKToEnd) endRequested = true;
 760         } // --- End of critical section
 761           if (stop) DEBTRACE("wake up from waitResume");
 762         break;
 763       }
 764     default:
 765     case YACS::STEPBYSTEP:
 766       {
 767         { // --- Critical section
 768           YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 769           _tasksSave = _tasks;
 770           _listOfTasksToLoad.clear();
 771           for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
 772             {
 773               string nodeToLoad = _mainSched->getTaskName(*iter);
 774               _listOfTasksToLoad.push_back(nodeToLoad);
 775             }
 776           if (getNbOfThreads())
 777             _executorState = YACS::WAITINGTASKS; // will be paused after completion of running tasks
 778           else
 779             _executorState = YACS::PAUSED;
 780           sendEvent("executor");
 781           _condForPilot.notify_all();
 782           if (!_isOKToEnd)
 783             waitResume(); // wait until pilot calls resumeCurrentBreakPoint(), mutex released during wait
 784                           // or, if no pilot, wait until no more running tasks (stop on error)
 785           if (_isOKToEnd) endRequested = true;
 786         } // --- End of critical section
 787         DEBTRACE("wake up from waitResume");
 788         break;
 789       }
 790     }
 791   DEBTRACE("endRequested: " << endRequested);
 792   return endRequested;
 793 }
 794
 795
 796 //! in modes Step By step or with BreakPoint, wait until pilot resumes the execution
 797 /*!
 798  *  With the condition Mutex, the mutex is released atomically during the wait.
 799  *  Pilot calls Executor::resumeCurrentBreakPoint to resume execution.
 800  *  Must be called while mutex is locked.
 801  */
 802
 803 void Executor::waitResume()
 804 {
 805   DEBTRACE("Executor::waitResume()");
 806   _condForStepByStep.wait(_mutexForSchedulerUpdate); // wait until pilot calls resumeCurrentBreakPoint()
 807   DEBTRACE("---");
 808 }
 809
 810
 811 //! Perform loading of a Task.
 812 /*!
 813  *  \param task  : Task to load
 814  */
 815
 816 void Executor::loadTask(Task *task, const Executor *execInst)
 817 {
 818   DEBTRACE("Executor::loadTask(Task *task)");
 819   if(task->getState() != YACS::TOLOAD)
 820     return;
 821   traceExec(task, "state:TOLOAD", ComputePlacement(task));
 822   {//Critical section
 823     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 824     _mainSched->notifyFrom(task,YACS::START,execInst);
 825   }//End of critical section
 826   try
 827     {
 828       traceExec(task, "load", ComputePlacement(task));
 829       task->load();
 830       traceExec(task, "initService", ComputePlacement(task));
 831       task->initService();
 832     }
 833   catch(Exception& ex)
 834     {
 835       std::cerr << ex.what() << std::endl;
 836       {//Critical section
 837         YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 838         task->aborted();
 839         _mainSched->notifyFrom(task,YACS::ABORT,execInst);
 840         traceExec(task, "state:"+Node::getStateName(task->getState()), ComputePlacement(task));
 841       }//End of critical section
 842     }
 843   catch(...)
 844     {
 845       std::cerr << "Load failed" << std::endl;
 846       {//Critical section
 847         YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 848         task->aborted();
 849         _mainSched->notifyFrom(task,YACS::ABORT,execInst);
 850         traceExec(task, "state:"+Node::getStateName(task->getState()), ComputePlacement(task));
 851       }//End of critical section
 852     }
 853 }
 854
 855 struct threadargs
 856 {
 857   Task *task;
 858   Scheduler *sched;
 859   Executor *execInst;
 860 };
 861
 862 void Executor::loadTasks(const std::vector<Task *>& tasks, const Executor *execInst)
 863 {
 864   for(std::vector<Task *>::const_iterator iter = _tasks.begin(); iter != _tasks.end(); iter++)
 865     loadTask(*iter,execInst);
 866 }
 867
 868 void Executor::loadParallelTasks(const std::vector<Task *>& tasks, const Executor *execInst)
 869 {
 870   std::vector<Thread> ths(tasks.size());
 871   std::size_t ithread(0);
 872   for(std::vector<Task *>::const_iterator iter = _tasks.begin(); iter != _tasks.end(); iter++, ithread++)
 873     {
 874       DEBTRACE("Executor::loadParallelTasks(Task *task)");
 875       struct threadargs *args(new threadargs);
 876       args->task = (*iter);
 877       args->sched = _mainSched;
 878       args->execInst = this;
 879       ths[ithread].go(functionForTaskLoad, args, _threadStackSize);
 880     }
 881   for(ithread=0;ithread<tasks.size();ithread++)
 882     ths[ithread].join();
 883 }
 884
 885 //! Execute a list of tasks possibly connected through datastream links
 886 /*!
 887  *  \param tasks  : a list of tasks to execute
 888  *
 889  */
 890 void Executor::launchTasks(const std::vector<Task *>& tasks)
 891 {
 892   //First phase, make datastream connections
 893   for(vector<Task *>::const_iterator iter=tasks.begin();iter!=tasks.end();iter++)
 894     {
 895       YACS::StatesForNode state=(*iter)->getState();
 896       if(state != YACS::TOLOAD && state != YACS::TORECONNECT)continue;
 897       try
 898         {
 899           (*iter)->connectService();
 900           traceExec(*iter, "connectService",ComputePlacement(*iter));
 901           {//Critical section
 902             YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 903             (*iter)->connected();
 904           }//End of critical section
 905         }
 906       catch(Exception& ex)
 907         {
 908           std::cerr << ex.what() << std::endl;
 909           try
 910             {
 911               (*iter)->disconnectService();
 912               traceExec(*iter, "disconnectService",ComputePlacement(*iter));
 913             }
 914           catch(...)
 915             {
 916               // Disconnect has failed
 917               traceExec(*iter, "disconnectService failed, ABORT",ComputePlacement(*iter));
 918             }
 919           {//Critical section
 920             YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 921             (*iter)->aborted();
 922             _mainSched->notifyFrom(*iter,YACS::ABORT,this);
 923           }//End of critical section
 924         }
 925       catch(...)
 926         {
 927           std::cerr << "Problem in connectService" << std::endl;
 928           try
 929             {
 930               (*iter)->disconnectService();
 931               traceExec(*iter, "disconnectService",ComputePlacement(*iter));
 932             }
 933           catch(...)
 934             {
 935               // Disconnect has failed
 936               traceExec(*iter, "disconnectService failed, ABORT",ComputePlacement(*iter));
 937             }
 938           {//Critical section
 939             YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 940             (*iter)->aborted();
 941             _mainSched->notifyFrom(*iter,YACS::ABORT,this);
 942           }//End of critical section
 943         }
 944       if((*iter)->getState() == YACS::ERROR)
 945         {
 946           //try to put all coupled tasks in error
 947           std::set<Task*> coupledSet;
 948           (*iter)->getCoupledTasks(coupledSet);
 949           for (std::set<Task*>::iterator it = coupledSet.begin(); it != coupledSet.end(); ++it)
 950             {
 951               Task* t=*it;
 952               if(t == *iter)continue;
 953               if(t->getState() == YACS::ERROR)continue;
 954               try
 955                 {
 956                   t->disconnectService();
 957                   traceExec(t, "disconnectService",ComputePlacement(*iter));
 958                 }
 959               catch(...)
 960                 {
 961                   // Disconnect has failed
 962                   traceExec(t, "disconnectService failed, ABORT",ComputePlacement(*iter));
 963                 }
 964               {//Critical section
 965                 YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
 966                 t->aborted();
 967                 _mainSched->notifyFrom(t,YACS::ABORT,this);
 968               }//End of critical section
 969               traceExec(t, "state:"+Node::getStateName(t->getState()),ComputePlacement(*iter));
 970             }
 971         }
 972       traceExec(*iter, "state:"+Node::getStateName((*iter)->getState()),ComputePlacement(*iter));
 973     }
 974
 975   //Second phase, execute each task in a thread
 976   for(vector<Task *>::const_iterator iter=tasks.begin();iter!=tasks.end();iter++)
 977     {
 978       launchTask(*iter);
 979     }
 980 }
 981
 982 //! Execute a Task in a thread
 983 /*!
 984  *  \param task  : Task to execute
 985  *
 986  *  Calls Scheduler::notifyFrom of main node (_mainSched) to notify start
 987  *
 988  *  Calls Executor::functionForTaskExecution in Thread
 989  */
 990
 991 void Executor::launchTask(Task *task)
 992 {
 993   DEBTRACE("Executor::launchTask(Task *task)");
 994   struct threadargs *args;
 995   if(task->getState() != YACS::TOACTIVATE)return;
 996
 997   DEBTRACE("before _semForMaxThreads.wait " << _semThreadCnt);
 998   if(_semThreadCnt == 0)
 999     {
1000       //check if we have enough threads to run
1001       std::set<Task*> tmpSet=_runningTasks;
1002       std::set<Task*>::iterator it = tmpSet.begin();
1003       std::string status="running";
1004       std::set<Task*> coupledSet;
1005       while( it != tmpSet.end() )
1006         {
1007           Task* tt=*it;
1008           coupledSet.clear();
1009           tt->getCoupledTasks(coupledSet);
1010           status="running";
1011           for (std::set<Task*>::iterator iter = coupledSet.begin(); iter != coupledSet.end(); ++iter)
1012             {
1013               if((*iter)->getState() == YACS::TOACTIVATE)status="toactivate";
1014               tmpSet.erase(*iter);
1015             }
1016           if(status=="running")break;
1017           it = tmpSet.begin();
1018         }
1019
1020       if(status=="toactivate")
1021         {
1022           std::cerr << "WARNING: maybe you need more threads to run your schema (current value="<< _maxThreads << ")" << std::endl;
1023           std::cerr << "If it is the case, set the YACS_MAX_THREADS environment variable to a bigger value (export YACS_MAX_THREADS=xxx)" << std::endl;
1024         }
1025     }
1026
1027   _semForMaxThreads.wait();
1028   _semThreadCnt -= 1;
1029
1030   args= new threadargs;
1031   args->task = task;
1032   args->sched = _mainSched;
1033   args->execInst = this;
1034
1035   traceExec(task, "launch",ComputePlacement(task));
1036
1037   { // --- Critical section
1038     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
1039     _numberOfRunningTasks++;
1040     _runningTasks.insert(task);
1041     task->begin(); //change state to ACTIVATED
1042   } // --- End of critical section
1043   Thread(functionForTaskExecution, args, _threadStackSize);
1044 }
1045
1046 //! wait until a running task ends
1047
1048 void Executor::sleepWhileNoEventsFromAnyRunningTask()
1049 {
1050   DEBTRACE("Executor::sleepWhileNoEventsFromAnyRunningTask()");
1051 //   _semForNewTasksToPerform.wait(); //----utiliser pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
1052   YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForSchedulerUpdate);
1053   if (_numberOfRunningTasks > 0 && _numberOfEndedTasks==0)
1054     {
1055       _isWaitingEventsFromRunningTasks = true;
1056       _condForNewTasksToPerform.wait(_mutexForSchedulerUpdate); // mutex released during wait
1057     }
1058   _numberOfEndedTasks=0;
1059   DEBTRACE("---");
1060 }
1061
1062 //! not implemented
1063
1064 void Executor::notifyEndOfThread(YACS::BASES::Thread *thread)
1065 {
1066   /*_mutexForNbOfConcurrentThreads.lock();
1067   _groupOfAllThreadsCreated.remove(thread);
1068   delete thread;
1069   _mutexForNbOfConcurrentThreads.unlock();*/
1070 }
1071
1072
1073 //! must be used protected by _mutexForSchedulerUpdate!
1074
1075 void Executor::wakeUp()
1076 {
1077   DEBTRACE("Executor::wakeUp() " << _isWaitingEventsFromRunningTasks);
1078   if (_isWaitingEventsFromRunningTasks)
1079     {
1080       _isWaitingEventsFromRunningTasks = false;
1081       _condForNewTasksToPerform.notify_all();
1082     }
1083   else
1084     _numberOfEndedTasks++;
1085 }
1086
1087 //! number of running tasks
1088
1089 int Executor::getNbOfThreads()
1090 {
1091   int ret;
1092   YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForNbOfConcurrentThreads);
1093   _isRunningunderExternalControl=true;
1094   ret = _groupOfAllThreadsCreated.size();
1095   return ret;
1096 }
1097
1098 /*!
1099  * This thread is NOT supposed to be detached !
1100  */
1101 void *Executor::functionForTaskLoad(void *arg)
1102 {
1103   DEBTRACE("Executor::functionForTaskLoad(void *arg)");
1104   struct threadargs *args = (struct threadargs *) arg;
1105   Task *task=args->task;
1106   Scheduler *sched=args->sched;
1107   Executor *execInst=args->execInst;
1108   delete args;
1109   execInst->loadTask(task,execInst);// no throw of this method - all throw are catched !
1110   return 0;
1111 }
1112
1113 //! Function to perform execution of a task in a thread
1114 /*!
1115  *  \param arg  : 3 elements (a Task, a Scheduler, an Executor)
1116  *
1117  *  Calls Task::execute
1118  *
1119  *  Calls Task::finished when the task is finished
1120  *
1121  *  Calls (notify with event YACS::FINISH) Scheduler::notifyFrom when the task is finished
1122  *
1123  *  Calls Executor::wakeUp and Executor::notifyEndOfThread
1124  */
1125
1126 void *Executor::functionForTaskExecution(void *arg)
1127 {
1128   DEBTRACE("Executor::functionForTaskExecution(void *arg)");
1129
1130   struct threadargs *args = (struct threadargs *) arg;
1131   Task *task=args->task;
1132   Scheduler *sched=args->sched;
1133   Executor *execInst=args->execInst;
1134   delete args;
1135   execInst->traceExec(task, "state:"+Node::getStateName(task->getState()),ComputePlacement(task));
1136
1137   Thread::detach();
1138
1139   // Execute task
1140
1141   YACS::Event ev=YACS::FINISH;
1142   try
1143     {
1144       execInst->traceExec(task, "start execution",ComputePlacement(task));
1145       task->execute();
1146       execInst->traceExec(task, "end execution OK",ComputePlacement(task));
1147     }
1148   catch(Exception& ex)
1149     {
1150       std::cerr << "YACS Exception during execute" << std::endl;
1151       std::cerr << ex.what() << std::endl;
1152       ev=YACS::ABORT;
1153       string message = "end execution ABORT, ";
1154       message += ex.what();
1155       execInst->traceExec(task, message,ComputePlacement(task));
1156     }
1157   catch(...)
1158     {
1159       // Execution has failed
1160       std::cerr << "Execution has failed: unknown reason" << std::endl;
1161       ev=YACS::ABORT;
1162       execInst->traceExec(task, "end execution ABORT, unknown reason",ComputePlacement(task));
1163     }
1164
1165   // Disconnect task
1166   try
1167     {
1168       DEBTRACE("task->disconnectService()");
1169       task->disconnectService();
1170       execInst->traceExec(task, "disconnectService",ComputePlacement(task));
1171     }
1172   catch(...)
1173     {
1174       // Disconnect has failed
1175       std::cerr << "disconnect has failed" << std::endl;
1176       ev=YACS::ABORT;
1177       execInst->traceExec(task, "disconnectService failed, ABORT",ComputePlacement(task));
1178     }
1179   //
1180
1181   std::string placement(ComputePlacement(task));
1182
1183   // container management for HomogeneousPoolOfContainer
1184
1185   HomogeneousPoolContainer *contC(dynamic_cast<HomogeneousPoolContainer *>(task->getContainer()));
1186   if(contC)
1187     {
1188       YACS::BASES::AutoLocker<Container> alckCont(contC);
1189       contC->release(task);
1190     }
1191
1192   DEBTRACE("End task->execute()");
1193   { // --- Critical section
1194     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&execInst->_mutexForSchedulerUpdate);
1195     try
1196       {
1197         if (ev == YACS::FINISH) task->finished();
1198         if (ev == YACS::ABORT)
1199           {
1200             execInst->_errorDetected = true;
1201             if (execInst->_stopOnErrorRequested)
1202               {
1203                 execInst->_execMode = YACS::STEPBYSTEP;
1204                 execInst->_isOKToEnd = true;
1205               }
1206             task->aborted();
1207           }
1208         execInst->traceExec(task, "state:"+Node::getStateName(task->getState()),placement);
1209         sched->notifyFrom(task,ev,execInst);
1210       }
1211     catch(Exception& ex)
1212       {
1213         //notify has failed : it is supposed to have set state
1214         //so no need to do anything
1215         std::cerr << "Error during notification" << std::endl;
1216         std::cerr << ex.what() << std::endl;
1217       }
1218     catch(...)
1219       {
1220         //notify has failed : it is supposed to have set state
1221         //so no need to do anything
1222         std::cerr << "Notification failed" << std::endl;
1223       }
1224     execInst->_numberOfRunningTasks--;
1225     execInst->_runningTasks.erase(task);
1226     DEBTRACE("_numberOfRunningTasks: " << execInst->_numberOfRunningTasks
1227              << " _execMode: " << execInst->_execMode
1228              << " _executorState: " << execInst->_executorState);
1229     if ((execInst->_numberOfRunningTasks == 0) && (execInst->_execMode != YACS::CONTINUE)) // no more running tasks
1230       {
1231         if (execInst->_executorState == YACS::WAITINGTASKS)
1232           {
1233             execInst->_executorState = YACS::PAUSED;
1234             execInst->sendEvent("executor");
1235             execInst->_condForPilot.notify_all();
1236             if (execInst->_errorDetected &&
1237                 execInst->_stopOnErrorRequested &&
1238                 !execInst->_isRunningunderExternalControl)
1239               execInst->_condForStepByStep.notify_all(); // exec thread may be on waitResume
1240           }
1241       }
1242     DEBTRACE("before _semForMaxThreads.post " << execInst->_semThreadCnt);
1243     execInst->_semForMaxThreads.post();
1244     execInst->_semThreadCnt += 1;
1245     DEBTRACE("after _semForMaxThreads.post " << execInst->_semThreadCnt);
1246     if (execInst->_executorState != YACS::PAUSED)  execInst->wakeUp();
1247
1248   } // --- End of critical section (change state)
1249
1250   //execInst->notifyEndOfThread(0);
1251   Thread::exit(0);
1252   return 0;
1253 }
1254
1255 void Executor::traceExec(Task *task, const std::string& message, const std::string& placement)
1256 {
1257   string nodeName = _mainSched->getTaskName(task);
1258   Container *cont = task->getContainer();
1259   string containerName = "---";
1260   if (cont)
1261     containerName = cont->getName();
1262
1263 #ifdef WIN32
1264   DWORD now = timeGetTime();
1265   double elapse = (now - _start)/1000.0;
1266 #else
1267   timeval now;
1268   gettimeofday(&now, NULL);
1269   double elapse = (now.tv_sec - _start.tv_sec) + double(now.tv_usec - _start.tv_usec)/1000000.0;
1270 #endif
1271   {
1272     YACS::BASES::AutoLocker<YACS::BASES::Mutex> alck(&_mutexForTrace);
1273     _trace << elapse << " " << containerName << " " << placement << " " << nodeName << " " << message << endl;
1274     _trace << flush;
1275   }
1276 }
1277
1278 //! emit notification to all observers registered with  the dispatcher
1279 /*!
1280  * The dispatcher is unique and can be obtained by getDispatcher()
1281  */
1282 void Executor::sendEvent(const std::string& event)
1283 {
1284   Dispatcher* disp=Dispatcher::getDispatcher();
1285   YASSERT(disp);
1286   YASSERT(_root);
1287   disp->dispatch(_root,event);
1288 }
1289
1290 /*!
1291  * This method takes in input a list of tasks and selects from that lists a part of it considering only the containers.
1292  * If tasks have no container instance subclass of HomogeneousPoolContainer this method will let the \a tsks untouched.
1293  *
1294  * \param [in,out] tsks - list of tasks to be
1295  */
1296 void Executor::FilterTasksConsideringContainers(std::vector<Task *>& tsks)
1297 {
1298   std::map<HomogeneousPoolContainer *, std::vector<Task *> > m;
1299   for(std::vector<Task *>::const_iterator it=tsks.begin();it!=tsks.end();it++)
1300     {
1301       Task *cur(*it);
1302       if(!cur)
1303         continue;
1304       Container *cont(cur->getContainer());
1305       if(!cont)
1306         {
1307           m[(HomogeneousPoolContainer *)NULL].push_back(cur);
1308           continue;
1309         }
1310       HomogeneousPoolContainer *contC(dynamic_cast<HomogeneousPoolContainer *>(cont));
1311       if(!contC)
1312         {
1313           m[(HomogeneousPoolContainer *)NULL].push_back(cur);
1314           continue;
1315         }
1316       m[contC].push_back(cur);
1317     }
1318   //
1319   std::vector<Task *> ret;
1320   for(std::map<HomogeneousPoolContainer *, std::vector<Task *> >::const_iterator it=m.begin();it!=m.end();it++)
1321     {
1322       HomogeneousPoolContainer *curhpc((*it).first);
1323       const std::vector<Task *>& curtsks((*it).second);
1324       if(!curhpc)
1325         {
1326           ret.insert(ret.end(),curtsks.begin(),curtsks.end());
1327         }
1328       else
1329         {
1330           // start of critical section for container curhpc
1331           YACS::BASES::AutoLocker<Container> alckForCont(curhpc);
1332           std::vector<const Task *> vecOfTaskSharingSameHPContToBeRunSimutaneously;
1333           std::size_t sz(curhpc->getNumberOfFreePlace());
1334           std::vector<Task *>::const_iterator it2(curtsks.begin());
1335           for(std::size_t i=0;i<sz && it2!=curtsks.end();i++,it2++)
1336             {
1337               vecOfTaskSharingSameHPContToBeRunSimutaneously.push_back(*it2);
1338               ret.push_back(*it2);
1339             }
1340           curhpc->allocateFor(vecOfTaskSharingSameHPContToBeRunSimutaneously);
1341           //end of critical section
1342         }
1343     }
1344   //
1345   tsks=ret;
1346 }
1347
1348 std::string Executor::ComputePlacement(Task *zeTask)
1349 {
1350   std::string placement("---");
1351   if(!zeTask)
1352     return placement;
1353   if(zeTask->getContainer())
1354     placement=zeTask->getContainer()->getFullPlacementId(zeTask);
1355   return placement;
1356 }