#include "Executor.hxx"
#include "Task.hxx"
#include "Scheduler.hxx"
-#include <pthread.h>
+#include "Dispatcher.hxx"
+
+#include "VisitorSaveState.hxx"
+#include "ComposedNode.hxx"
+
#include <iostream>
+#include <fstream>
+#include <sys/stat.h>
+#include <cassert>
using namespace YACS::ENGINE;
using namespace std;
using YACS::BASES::Thread;
using YACS::BASES::Semaphore;
-Executor::Executor():_nbOfConcurrentThreads(0)//,_cond(PTHREAD_COND_INITIALIZER)
+//#define _DEVDEBUG_
+#include "YacsTrace.hxx"
+
+Executor::Executor():_nbOfConcurrentThreads(0), _semForMaxThreads(50)
{
+ _root=0;
+ _toContinue = true;
+ _isOKToEnd = false;
+ _stopOnErrorRequested = false;
+ _dumpOnErrorRequested = false;
+ _errorDetected = false;
+ _isRunningunderExternalControl=false;
+ _executorState = YACS::NOTYETINITIALIZED;
+ _execMode = YACS::CONTINUE;
+ _semThreadCnt = 50;
}
Executor::~Executor()
delete *iter;
}
-void Executor::RunW(Scheduler *graph)
+//! Execute a graph waiting for completion
+/*!
+ * \param graph : schema to execute
+ * \param debug : display the graph with dot if debug == 1
+ *
+ * Calls Scheduler::getNextTasks and Scheduler::selectRunnableTasks to select tasks to execute
+ *
+ * Calls Executor::launchTask to execute a selected Task.
+ *
+ * Completion when graph is finished (Scheduler::isFinished)
+ */
+
+void Executor::RunA(Scheduler *graph,int debug, bool fromScratch)
{
+ DEBTRACE("Executor::RunW debug: " << debug << " fromScratch: " << fromScratch);
_mainSched=graph;
+ _root = dynamic_cast<ComposedNode *>(_mainSched);
+ if (!_root) throw Exception("Executor::Run, Internal Error!");
bool isMore;
int i=0;
- graph->init();
+ if(debug>1)_displayDot(graph);
+ if (fromScratch)
+ {
+ graph->init();
+ graph->exUpdateState();
+ }
+ if(debug>1)_displayDot(graph);
vector<Task *> tasks;
vector<Task *>::iterator iter;
- bool toContinue=true;
- wakeUp();
- while(toContinue)
+ _toContinue=true;
+ _execMode = YACS::CONTINUE;
+ _isWaitingEventsFromRunningTasks = false;
+ _numberOfRunningTasks = 0;
+ while(_toContinue)
{
sleepWhileNoEventsFromAnyRunningTask();
+
+ if(debug>2)_displayDot(graph);
+
{//Critical section
- _mutexForSchedulerUpdate.lock();
- tasks=graph->getNextTasks(isMore);
- graph->selectRunnableTasks(tasks);
- _mutexForSchedulerUpdate.unlock();
+ _mutexForSchedulerUpdate.lock();
+ tasks=graph->getNextTasks(isMore);
+ graph->selectRunnableTasks(tasks);
+ _mutexForSchedulerUpdate.unlock();
}//End of critical section
+
+ if(debug>2)_displayDot(graph);
+
for(iter=tasks.begin();iter!=tasks.end();iter++)
- launchTask(*iter);
+ loadTask(*iter);
+
+ if(debug>1)_displayDot(graph);
+
+ launchTasks(tasks);
+
+ if(debug>1)_displayDot(graph);
+
{//Critical section
- _mutexForSchedulerUpdate.lock();
- toContinue=!graph->isFinished();
- _mutexForSchedulerUpdate.unlock();
+ _mutexForSchedulerUpdate.lock();
+ _toContinue=!graph->isFinished();
+ _mutexForSchedulerUpdate.unlock();
}//End of critical section
+ DEBTRACE("_toContinue: " << _toContinue);
+
+ if(debug>0)_displayDot(graph);
+
i++;
}
}
+//! Execute a graph with breakpoints or step by step
+/*!
+ * To be launch in a thread (main thread controls the progression).
+ * \param graph : schema to execute
+ * \param debug : display the graph with dot if debug >0
+ * \param fromscratch : if false, state from a previous partial exection is already loaded
+ *
+ * Calls Scheduler::getNextTasks and Scheduler::selectRunnableTasks to select tasks to execute
+ *
+ * Calls Executor::checkBreakPoints to verify if a pause is requested
+ *
+ * Calls Executor::launchTask to execute a selected Task
+ *
+ * Completion when graph is finished (Scheduler::isFinished)
+ *
+ * States of execution:
+ * - YACS::NOTYETINITIALIZED
+ * - YACS::INITIALISED
+ * - YACS::RUNNING (to next breakpoint or step)
+ * - YACS::WAITINGTASKS (a breakpoint or step as been reached, but there are still running tasks)
+ * - YACS::PAUSED (a breakpoint or step as been reached, no more running tasks)
+ * - YACS::FINISHED (no more ready tasks, nore running tasks)
+ * - YACS::STOPPED (stopped by user before end)
+ *
+ * Modes of Execution:
+ * - YACS::CONTINUE (normal run without breakpoints)
+ * - YACS::STEPBYSTEP (pause at each loop)
+ * - YACS::STOPBEFORENODES (pause when a node is reached)
+ *
+ * A breakpoint is defined by a node name. The breakpoint is reached when the node becomes ready.
+ * Step by Step means execution node by node or group of node by group of nodes.
+ * At a given step, the user decides to launch all the ready nodes or only a subset
+ * (Caution: some nodes must run in parallel).
+ * The next event (end of task) may give a new set of ready nodes, and define a new step.
+ *
+ * The graph execution may be controled by a pilot which sends requests. Requests are asynchronous.
+ * Requests are taken into account only on certain states, otherwise return the status IgnoredRequest.
+ * - Executor::getCurrentExecMode
+ * - Executor::getExecutorState
+ * - Executor::setExecMode : change the execution mode for next loop
+ * - Executor::setListOfBreakPoints : must be set before setting YACS::STOPBEFORENODES
+ * - Executor::getTasksToLoad : when paused or waiting tasks, get the list of next tasks
+ * - Executor::setStepsToExecute : define a subset of the list given by Executor::getTasksToLoad
+ * - Executor::resumeCurrentBreakPoint : when paused or waiting tasks, resumes execution
+ * - Executor::isNotFinished
+ * - Executor::stopExecution : stop execution asap, i.e. set STEPBYSTEP and wait PAUSED
+ * - Executor::saveState : dump the current state of execution in an xml file
+ * - Executor::loadState : Not yet implemented
+ * - Executor::getNbOfThreads
+ * - Executor::displayDot
+ * - Executor::setStopOnError : ask to stop execution if a node is found in ERROR state
+ *
+ * If the pilot wants to wait the state YACS::PAUSED or YACS::WAITINGTASKS, synchronisation is obtained with:
+ * - Executor::waitPause
+ *
+ * TO BE VALIDATED:
+ * - Pilot may connect to executor during execution, or deconnect.
+ * - Several Pilots may be connected at the same time (for observation...)
+ *
+ */
+
+void Executor::RunB(Scheduler *graph,int debug, bool fromScratch)
+{
+ DEBTRACE("Executor::RunB debug: "<< graph->getName() <<" "<< debug<<" fromScratch: "<<fromScratch);
+
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _mainSched = graph;
+ _root = dynamic_cast<ComposedNode *>(_mainSched);
+ if (!_root) throw Exception("Executor::Run, Internal Error!");
+ _executorState = YACS::NOTYETINITIALIZED;
+ sendEvent("executor");
+ _toContinue=true;
+ _isOKToEnd = false;
+ _errorDetected = false;
+ _isWaitingEventsFromRunningTasks = false;
+ _numberOfRunningTasks = 0;
+ string tracefile = "traceExec_";
+ tracefile += _mainSched->getName();
+ _trace.open(tracefile.c_str());
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+
+ if (debug > 1) _displayDot(graph);
+
+ if (fromScratch)
+ {
+ graph->init();
+ graph->exUpdateState();
+ }
+ _executorState = YACS::INITIALISED;
+ sendEvent("executor");
+
+ if (debug > 1) _displayDot(graph);
+
+ vector<Task *>::iterator iter;
+ bool isMore;
+ int problemCount=0;
+ int numberAllTasks;
+
+ _executorState = YACS::RUNNING;
+ sendEvent("executor");
+ while (_toContinue)
+ {
+ DEBTRACE("--- executor main loop");
+ sleepWhileNoEventsFromAnyRunningTask();
+ DEBTRACE("--- events...");
+ if (debug > 2) _displayDot(graph);
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _tasks=graph->getNextTasks(isMore);
+ numberAllTasks=_numberOfRunningTasks+_tasks.size();
+ graph->selectRunnableTasks(_tasks);
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+ if (debug > 2) _displayDot(graph);
+ if (_executorState == YACS::RUNNING)
+ {
+ if (checkBreakPoints()) break; // end of thread requested, OK to exit at once;
+ if (debug > 0) _displayDot(graph);
+ DEBTRACE("---");
+ for (iter = _tasks.begin(); iter != _tasks.end(); iter++)
+ loadTask(*iter);
+ if (debug > 1) _displayDot(graph);
+ DEBTRACE("---");
+ launchTasks(_tasks);
+ DEBTRACE("---");
+ }
+ if (debug > 1) _displayDot(graph);
+ { // --- Critical section
+ DEBTRACE("---");
+ _mutexForSchedulerUpdate.lock();
+ _toContinue = !graph->isFinished();
+
+ if(_toContinue && numberAllTasks==0)
+ {
+ //Problem : no running tasks and no task to launch ??
+ problemCount++;
+ std::cerr << "Problem in Executor : no running tasks and no task to launch ?? problemCount=" << problemCount << std::endl;
+ //Pause to give a chance to interrupt
+ usleep(1000);
+ if(problemCount > 25)
+ {
+ // Too much problems encountered : stop execution
+ _toContinue=false;
+ }
+ }
+
+ if (! _toContinue)
+ {
+ _executorState = YACS::FINISHED;
+ sendEvent("executor");
+ _condForPilot.notify_all();
+ }
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+ if (debug > 0) _displayDot(graph);
+ DEBTRACE("_toContinue: " << _toContinue);
+ }
+
+ DEBTRACE("End of main Loop");
+
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ if ( _toContinue) // --- break while(): request to stop detected on checkBreakPoints()
+ {
+ DEBTRACE("stop requested: End soon");
+ _executorState = YACS::STOPPED;
+ _toContinue = false;
+ sendEvent("executor");
+ }
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+ if ( _dumpOnErrorRequested && _errorDetected && !_isRunningunderExternalControl)
+ {
+ saveState(_dumpErrorFile);
+ }
+ _trace.close();
+ DEBTRACE("End of RunB thread");
+}
+
+YACS::ExecutionMode Executor::getCurrentExecMode()
+{
+ _isRunningunderExternalControl=true;
+ return _execMode;
+}
+
+
+YACS::ExecutorState Executor::getExecutorState()
+{
+ _isRunningunderExternalControl=true;
+ return _executorState;
+}
+
+
+bool Executor::isNotFinished()
+{
+ _isRunningunderExternalControl=true;
+ return _toContinue;
+}
+
+//! ask to stop execution on the first node found in error
+/*!
+ * \param dumpRequested produce a state dump when an error is found
+ * \param xmlFile name of file used for state dump
+ */
+
+void Executor::setStopOnError(bool dumpRequested, std::string xmlFile)
+{
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _dumpErrorFile=xmlFile;
+ _stopOnErrorRequested=true;
+ _dumpOnErrorRequested = dumpRequested;
+ if (dumpRequested && xmlFile.empty())
+ throw YACS::Exception("dump on error requested and no filename given for dump");
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+}
+
+//! Dynamically set the current mode of execution
+/*!
+ * The mode can be Continue, step by step, or stop before execution of a node
+ * defined in a list of breakpoints.
+ */
+
+void Executor::setExecMode(YACS::ExecutionMode mode)
+{
+ DEBTRACE("Executor::setExecMode(YACS::ExecutionMode mode) " << mode);
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _isRunningunderExternalControl=true;
+ _execMode = mode;
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+}
+
+//! wake up executor when in pause
+/*!
+ * When Executor is in state paused or waiting for task completion, the thread
+ * running loop RunB waits on condition _condForStepByStep.
+ * Thread RunB is waken up.
+ * \return true when actually wakes up executor
+ */
+
+bool Executor::resumeCurrentBreakPoint()
+{
+ DEBTRACE("Executor::resumeCurrentBreakPoint()");
+ bool ret = false;
+ //bool doDump = false;
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _isRunningunderExternalControl=true;
+ DEBTRACE("_executorState: " << _executorState);
+ switch (_executorState)
+ {
+ case YACS::WAITINGTASKS:
+ case YACS::PAUSED:
+ {
+ _condForStepByStep.notify_all();
+ _executorState = YACS::RUNNING;
+ sendEvent("executor");
+ ret = true;
+ //if (_dumpOnErrorRequested && _errorDetected) doDump =true;
+ break;
+ }
+ case YACS::FINISHED:
+ case YACS::STOPPED:
+ {
+ //if (_dumpOnErrorRequested && _errorDetected) doDump =true;
+ DEBTRACE("Graph Execution finished or stopped !");
+ break;
+ }
+ default :
+ {
+ // debug: no easy way to verify if main loop is acutally waiting on condition
+ }
+ }
+ _mutexForSchedulerUpdate.unlock();
+ DEBTRACE("---");
+ //if (doDump) saveState(_dumpErrorFile);
+ } // --- End of critical section
+ return ret;
+}
+
+
+//! define a list of nodes names as breakpoints in the graph
+
+
+void Executor::setListOfBreakPoints(std::list<std::string> listOfBreakPoints)
+{
+ DEBTRACE("Executor::setListOfBreakPoints(std::list<std::string> listOfBreakPoints)");
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _isRunningunderExternalControl=true;
+ _listOfBreakPoints = listOfBreakPoints;
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+}
+
+
+//! Get the list of tasks to load, to define a subset to execute in step by step mode
+/*!
+ * If the executor is not in mode YACS::WAITINGTASKS nor YACS::PAUSED, the list is empty.
+ * Use Executor::waitPause to wait.
+ */
+std::list<std::string> Executor::getTasksToLoad()
+{
+ DEBTRACE("Executor::getTasksToLoad()");
+ list<string> listOfNodesToLoad;
+ listOfNodesToLoad.clear();
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _isRunningunderExternalControl=true;
+ switch (_executorState)
+ {
+ case YACS::WAITINGTASKS:
+ case YACS::PAUSED:
+ {
+ listOfNodesToLoad = _listOfTasksToLoad;
+ break;
+ }
+ case YACS::NOTYETINITIALIZED:
+ case YACS::INITIALISED:
+ case YACS::RUNNING:
+ case YACS::FINISHED:
+ case YACS::STOPPED:
+ default:
+ {
+ break;
+ }
+ }
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+ return listOfNodesToLoad;
+}
+
+
+//! Define a subset of task to execute in step by step mode
+/*!
+ * Behaviour is unpredictable if the list is not a subset of the list given by Executor::getTasksToLoad
+ * in the current step.
+ * If some nodes must run in parallel, they must stay together in the list.
+ */
+
+bool Executor::setStepsToExecute(std::list<std::string> listToExecute)
+{
+ DEBTRACE("Executor::setStepsToExecute(std::list<std::string> listToExecute)");
+ bool ret = false;
+ vector<Task *>::iterator iter;
+ vector<Task *> restrictedTasks;
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _isRunningunderExternalControl=true;
+ switch (_executorState)
+ {
+ case YACS::WAITINGTASKS:
+ case YACS::PAUSED:
+ {
+ for (iter=_tasksSave.begin(); iter!=_tasksSave.end(); iter++)
+ {
+ string readyNode = _mainSched->getTaskName(*iter);
+ if (find(listToExecute.begin(), listToExecute.end(), readyNode)
+ != listToExecute.end())
+ {
+ restrictedTasks.push_back(*iter);
+ DEBTRACE("node to execute " << readyNode);
+ }
+ }
+ _tasks.clear();
+ for (iter=restrictedTasks.begin(); iter!=restrictedTasks.end(); iter++)
+ {
+ _tasks.push_back(*iter);
+ }
+ break;
+ }
+ case YACS::NOTYETINITIALIZED:
+ case YACS::INITIALISED:
+ case YACS::RUNNING:
+ case YACS::FINISHED:
+ case YACS::STOPPED:
+ default:
+ {
+ break;
+ }
+ }
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+
+ _tasks.clear();
+ for (iter=restrictedTasks.begin(); iter!=restrictedTasks.end(); iter++)
+ {
+ _tasks.push_back(*iter);
+ }
+ for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
+ {
+ string readyNode = _mainSched->getTaskName(*iter);
+ DEBTRACE("selected node to execute " << readyNode);
+ }
+
+}
+
+//! suspend pilot execution until Executor is in pause or waiting tasks completion mode.
+/*!
+ * Do nothing if execution is finished or in pause.
+ * Wait first step if Executor is running or in initialization.
+ */
+
+void Executor::waitPause()
+{
+ DEBTRACE("Executor::waitPause()");
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _isRunningunderExternalControl=true;
+ switch (_executorState)
+ {
+ default:
+ case YACS::STOPPED:
+ case YACS::FINISHED:
+ case YACS::WAITINGTASKS:
+ case YACS::PAUSED:
+ {
+ break;
+ }
+ case YACS::NOTYETINITIALIZED:
+ case YACS::INITIALISED:
+ case YACS::RUNNING:
+ {
+ _condForPilot.wait(_mutexForSchedulerUpdate); // wait until executor is PAUSED or WAITINGTASKS
+ break;
+ }
+ }
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+ DEBTRACE("---");
+}
+
+//! stops the execution as soon as possible
+
+void Executor::stopExecution()
+{
+ setExecMode(YACS::STEPBYSTEP);
+ //waitPause();
+ _isOKToEnd = true;
+ resumeCurrentBreakPoint();
+}
+
+//! save the current state of execution in an xml file
+
+bool Executor::saveState(const std::string& xmlFile)
+{
+ DEBTRACE("Executor::saveState() in " << xmlFile);
+ YACS::ENGINE::VisitorSaveState vst(_root);
+ vst.openFileDump(xmlFile.c_str());
+ _root->accept(&vst);
+ vst.closeFileDump();
+}
+
+//! not yet implemented
+
+bool Executor::loadState()
+{
+ DEBTRACE("Executor::loadState()");
+ _isRunningunderExternalControl=true;
+}
+
+
+static int isfile(char *filename)
+{
+ struct stat buf;
+ if (stat(filename, &buf) != 0)
+ return 0;
+ if (!S_ISREG(buf.st_mode))
+ return 0;
+ return 1;
+}
+
+//! Display the graph state as a dot display, public method
+
+void Executor::displayDot(Scheduler *graph)
+{
+ _isRunningunderExternalControl=true;
+ _displayDot(graph);
+}
+
+//! Display the graph state as a dot display
+/*!
+ * \param graph : the node to display
+ */
+
+void Executor::_displayDot(Scheduler *graph)
+{
+ std::ofstream g("titi");
+ ((ComposedNode*)graph)->writeDot(g);
+ g.close();
+ if(isfile("display.sh"))
+ system("sh display.sh");
+ else
+ system("dot -Tpng titi|display -delay 5");
+}
+
+//! Wait reactivation in modes Step By step or with BreakPoints
+/*!
+ * Check mode of execution (set by main thread):
+ * - YACS::CONTINUE : the graph execution continues.
+ * - YACS::STEPBYSTEP : wait on condition (pilot thread, Executor::resumeCurrentBreakPoint)
+ * - YACS::STOPBEFORENODES : if there are ready nodes in a list of breakpoints,
+ * wait on condition (pilot thread, Executor::resumeCurrentBreakPoint)
+ * else continue the graph execution.
+ * \return true if end of executor thread is requested
+ */
+
+bool Executor::checkBreakPoints()
+{
+ DEBTRACE("Executor::checkBreakPoints()");
+ vector<Task *>::iterator iter;
+ bool endRequested = false;
+
+ switch (_execMode)
+ {
+ case YACS::CONTINUE:
+ {
+ break;
+ }
+ case YACS::STOPBEFORENODES:
+ {
+ bool stop = false;
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _tasksSave = _tasks;
+ for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
+ {
+ string nodeToLoad = _mainSched->getTaskName(*iter);
+ if (find(_listOfBreakPoints.begin(), _listOfBreakPoints.end(), nodeToLoad)
+ != _listOfBreakPoints.end())
+ {
+ stop = true;
+ break;
+ }
+ }
+ if (stop)
+ {
+ _listOfTasksToLoad.clear();
+ for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
+ {
+ string nodeToLoad = _mainSched->getTaskName(*iter);
+ _listOfTasksToLoad.push_back(nodeToLoad);
+ }
+ if (getNbOfThreads())
+ _executorState = YACS::WAITINGTASKS; // will be paused after completion of running tasks
+ else
+ _executorState = YACS::PAUSED;
+ sendEvent("executor");
+ _condForPilot.notify_all();
+ }
+ //_mutexForSchedulerUpdate.unlock();
+ //} // --- End of critical section
+ if (stop && !_isOKToEnd) waitResume(); // wait until pilot calls resumeCurrentBreakPoint(), mutex released during wait
+ if (_isOKToEnd) endRequested = true;
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+ if (stop) DEBTRACE("wake up from waitResume");
+ break;
+ }
+ default:
+ case YACS::STEPBYSTEP:
+ {
+ { // --- Critical section
+ _mutexForSchedulerUpdate.lock();
+ _tasksSave = _tasks;
+ _listOfTasksToLoad.clear();
+ for (iter=_tasks.begin(); iter!=_tasks.end(); iter++)
+ {
+ string nodeToLoad = _mainSched->getTaskName(*iter);
+ _listOfTasksToLoad.push_back(nodeToLoad);
+ }
+ if (getNbOfThreads())
+ _executorState = YACS::WAITINGTASKS; // will be paused after completion of running tasks
+ else
+ _executorState = YACS::PAUSED;
+ sendEvent("executor");
+ _condForPilot.notify_all();
+ if (!_isOKToEnd)
+ waitResume(); // wait until pilot calls resumeCurrentBreakPoint(), mutex released during wait
+ // or, if no pilot, wait until no more running tasks (stop on error)
+ if (_isOKToEnd) endRequested = true;
+ _mutexForSchedulerUpdate.unlock();
+ } // --- End of critical section
+ DEBTRACE("wake up from waitResume");
+ break;
+ }
+ }
+ DEBTRACE("endRequested: " << endRequested);
+ return endRequested;
+}
+
+
+//! in modes Step By step or with BreakPoint, wait until pilot resumes the execution
+/*!
+ * With the condition Mutex, the mutex is released atomically during the wait.
+ * Pilot calls Executor::resumeCurrentBreakPoint to resume execution.
+ * Must be called while mutex is locked.
+ */
+
+void Executor::waitResume()
+{
+ DEBTRACE("Executor::waitResume()");
+ _condForStepByStep.wait(_mutexForSchedulerUpdate); // wait until pilot calls resumeCurrentBreakPoint()
+ DEBTRACE("---");
+}
+
+
+//! Perform loading of a Task.
+/*!
+ * \param task : Task to load
+ */
+
+void Executor::loadTask(Task *task)
+{
+ DEBTRACE("Executor::loadTask(Task *task)");
+ if(task->getState() != YACS::TOLOAD)return;
+ {//Critical section
+ _mutexForSchedulerUpdate.lock();
+ task->loaded();
+ _mainSched->notifyFrom(task,YACS::START);
+ _mutexForSchedulerUpdate.unlock();
+ }//End of critical section
+ try
+ {
+ task->load();
+ }
+ catch(Exception& ex)
+ {
+ std::cerr << ex.what() << std::endl;
+ {//Critical section
+ _mutexForSchedulerUpdate.lock();
+ task->aborted();
+ _mainSched->notifyFrom(task,YACS::ABORT);
+ _mutexForSchedulerUpdate.unlock();
+ }//End of critical section
+ }
+ catch(...)
+ {
+ std::cerr << "Load failed" << std::endl;
+ {//Critical section
+ _mutexForSchedulerUpdate.lock();
+ task->aborted();
+ _mainSched->notifyFrom(task,YACS::ABORT);
+ _mutexForSchedulerUpdate.unlock();
+ }//End of critical section
+ }
+}
+
+
+//! Execute a list of tasks possibly connected through datastream links
+/*!
+ * \param tasks : a list of tasks to execute
+ *
+ */
+void Executor::launchTasks(std::vector<Task *>& tasks)
+{
+ vector<Task *>::iterator iter;
+ //First phase, initialize the execution
+ for(iter=tasks.begin();iter!=tasks.end();iter++)
+ {
+ if((*iter)->getState() != YACS::TOACTIVATE)continue;
+ try
+ {
+ (*iter)->initService();
+ traceExec(*iter, "initService");
+ }
+ catch(Exception& ex)
+ {
+ std::cerr << ex.what() << std::endl;
+ {//Critical section
+ _mutexForSchedulerUpdate.lock();
+ (*iter)->aborted();
+ _mainSched->notifyFrom(*iter,YACS::ABORT);
+ _mutexForSchedulerUpdate.unlock();
+ }//End of critical section
+ }
+ catch(...)
+ {
+ std::cerr << "Problem in initService" << std::endl;
+ {//Critical section
+ _mutexForSchedulerUpdate.lock();
+ (*iter)->aborted();
+ _mainSched->notifyFrom(*iter,YACS::ABORT);
+ _mutexForSchedulerUpdate.unlock();
+ }//End of critical section
+ }
+ }
+ //Second phase, make datastream connections
+ for(iter=tasks.begin();iter!=tasks.end();iter++)
+ {
+ if((*iter)->getState() != YACS::TOACTIVATE)continue;
+ try
+ {
+ (*iter)->connectService();
+ traceExec(*iter, "connectService");
+ }
+ catch(Exception& ex)
+ {
+ std::cerr << ex.what() << std::endl;
+ {//Critical section
+ _mutexForSchedulerUpdate.lock();
+ (*iter)->aborted();
+ _mainSched->notifyFrom(*iter,YACS::ABORT);
+ _mutexForSchedulerUpdate.unlock();
+ }//End of critical section
+ }
+ catch(...)
+ {
+ std::cerr << "Problem in connectService" << std::endl;
+ {//Critical section
+ _mutexForSchedulerUpdate.lock();
+ (*iter)->aborted();
+ _mainSched->notifyFrom(*iter,YACS::ABORT);
+ _mutexForSchedulerUpdate.unlock();
+ }//End of critical section
+ }
+ }
+ //Third phase, execute each task in a thread
+ for(iter=tasks.begin();iter!=tasks.end();iter++)
+ {
+ DEBTRACE("before _semForMaxThreads.wait " << _semThreadCnt);
+ _semForMaxThreads.wait();
+ _semThreadCnt -= 1;
+ launchTask(*iter);
+ }
+}
+
+//! Execute a Task in a thread
+/*!
+ * \param task : Task to execute
+ *
+ * Calls Scheduler::notifyFrom of main node (_mainSched) to notify start
+ *
+ * Calls Executor::functionForTaskExecution in Thread
+ */
+
void Executor::launchTask(Task *task)
{
+ DEBTRACE("Executor::launchTask(Task *task)");
+ if(task->getState() != YACS::TOACTIVATE)return;
void **args=new void *[3];
- _mutexForNbOfConcurrentThreads.lock();
- _groupOfAllThreadsCreated.push_back(0);
- list<Thread *>::iterator iter=_groupOfAllThreadsCreated.end();
- iter--;
- _mutexForNbOfConcurrentThreads.unlock();
args[0]=(void *)task;
args[1]=(void *)_mainSched;
args[2]=(void *)this;
- {//Critical section
+ traceExec(task, "launch");
+
+ { // --- Critical section
_mutexForSchedulerUpdate.lock();
- task->begin();
- _mainSched->notifyFrom(task,YACS::START);
+ _numberOfRunningTasks++;
+ task->begin(); //change state to ACTIVATED
+ //no more need : done when loading
+ //_mainSched->notifyFrom(task,YACS::START);
_mutexForSchedulerUpdate.unlock();
- }//End of critical section
- _mutexForNbOfConcurrentThreads.lock();
- //functionForTaskExecution(args);//MultiThreaded=NO
- // *iter=
- new Thread(functionForTaskExecution,args);//MultiThreaded=YES
- _mutexForNbOfConcurrentThreads.unlock();
+ } // --- End of critical section
+ Thread(functionForTaskExecution,args);
+ //functionForTaskExecution(args);
}
+//! wait until a running task ends
+
void Executor::sleepWhileNoEventsFromAnyRunningTask()
{
- _semForNewTasksToPerform.wait();
+ DEBTRACE("Executor::sleepWhileNoEventsFromAnyRunningTask()");
+// _semForNewTasksToPerform.wait(); //----utiliser pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
+ _mutexForSchedulerUpdate.lock();
+ if (_numberOfRunningTasks > 0)
+ {
+ _isWaitingEventsFromRunningTasks = true;
+ _condForNewTasksToPerform.wait(_mutexForSchedulerUpdate); // mutex released during wait
+ }
+ _mutexForSchedulerUpdate.unlock();
+ DEBTRACE("---");
}
+//! not implemented
+
void Executor::notifyEndOfThread(YACS::BASES::Thread *thread)
{
/*_mutexForNbOfConcurrentThreads.lock();
_mutexForNbOfConcurrentThreads.unlock();*/
}
+
+//! must be used protected by _mutexForSchedulerUpdate!
+
void Executor::wakeUp()
{
- int val=_semForNewTasksToPerform.getValue();
- if(!val)
- _semForNewTasksToPerform.post();
+ DEBTRACE("Executor::wakeUp()");
+ if (_isWaitingEventsFromRunningTasks)
+ {
+ _isWaitingEventsFromRunningTasks = false;
+ _condForNewTasksToPerform.notify_all();
+ }
}
+//! number of running tasks
+
int Executor::getNbOfThreads()
{
int ret;
_mutexForNbOfConcurrentThreads.lock();
- ret=_groupOfAllThreadsCreated.size();
+ _isRunningunderExternalControl=true;
+ ret = _groupOfAllThreadsCreated.size();
_mutexForNbOfConcurrentThreads.unlock();
return ret;
}
+
+//! Function to perform execution of a task in a thread
+/*!
+ * \param arg : 3 elements (a Task, a Scheduler, an Executor)
+ *
+ * Calls Task::execute
+ *
+ * Calls Task::finished when the task is finished
+ *
+ * Calls (notify with event YACS::FINISH) Scheduler::notifyFrom when the task is finished
+ *
+ * Calls Executor::wakeUp and Executor::notifyEndOfThread
+ */
+
void *Executor::functionForTaskExecution(void *arg)
{
+ DEBTRACE("Executor::functionForTaskExecution(void *arg)");
void **argT=(void **)arg;
Task *task=(Task *)argT[0];
Scheduler *sched=(Scheduler *)argT[1];
Executor *execInst=(Executor *)argT[2];
delete [] argT;
- task->execute();
- {//Critical section
+ Thread::detach();
+
+ // Execute task
+
+ YACS::Event ev=YACS::FINISH;
+ try
+ {
+ execInst->traceExec(task, "start execution");
+ task->execute();
+ execInst->traceExec(task, "end execution OK");
+ }
+ catch(Exception& ex)
+ {
+ std::cerr << "YACS Exception during execute" << std::endl;
+ std::cerr << ex.what() << std::endl;
+ ev=YACS::ABORT;
+ string message = "end execution ABORT, ";
+ message += ex.what();
+ execInst->traceExec(task, message);
+ }
+ catch(...)
+ {
+ // Execution has failed
+ std::cerr << "Execution has failed: unknown reason" << std::endl;
+ ev=YACS::ABORT;
+ execInst->traceExec(task, "end execution ABORT, unknown reason");
+ }
+
+ // Disconnect task
+ try
+ {
+ task->disconnectService();
+ execInst->traceExec(task, "disconnectService");
+ }
+ catch(...)
+ {
+ // Disconnect has failed
+ std::cerr << "disconnect has failed" << std::endl;
+ ev=YACS::ABORT;
+ execInst->traceExec(task, "disconnectService failed, ABORT");
+ }
+
+ DEBTRACE("End task->execute()");
+ { // --- Critical section
execInst->_mutexForSchedulerUpdate.lock();
- task->finished();
- sched->notifyFrom(task,YACS::FINISH);
+ try
+ {
+ if (ev == YACS::FINISH) task->finished();
+ if (ev == YACS::ABORT)
+ {
+ execInst->_errorDetected = true;
+ if (execInst->_stopOnErrorRequested)
+ {
+ execInst->_execMode = YACS::STEPBYSTEP;
+ if (!execInst->_isRunningunderExternalControl) execInst->_isOKToEnd = true;
+ }
+ task->aborted();
+ }
+ sched->notifyFrom(task,ev);
+ }
+ catch(Exception& ex)
+ {
+ //notify has failed : it is supposed to have set state
+ //so no need to do anything
+ std::cerr << "Error during notification" << std::endl;
+ std::cerr << ex.what() << std::endl;
+ }
+ catch(...)
+ {
+ //notify has failed : it is supposed to have set state
+ //so no need to do anything
+ std::cerr << "Notification failed" << std::endl;
+ }
+ execInst->_numberOfRunningTasks--;
+ DEBTRACE("_numberOfRunningTasks: " << execInst->_numberOfRunningTasks
+ << " _execMode: " << execInst->_execMode
+ << " _executorState: " << execInst->_executorState);
+ if ((execInst->_numberOfRunningTasks == 0) && (execInst->_execMode != YACS::CONTINUE)) // no more running tasks
+ {
+ if (execInst->_executorState == YACS::WAITINGTASKS)
+ {
+ execInst->_executorState = YACS::PAUSED;
+ execInst->sendEvent("executor");
+ execInst->_condForPilot.notify_all();
+ if (execInst->_errorDetected &&
+ execInst->_stopOnErrorRequested &&
+ !execInst->_isRunningunderExternalControl)
+ execInst->_condForStepByStep.notify_all(); // exec thread may be on waitResume
+ }
+ }
+ DEBTRACE("before _semForMaxThreads.post " << execInst->_semThreadCnt);
+ execInst->_semForMaxThreads.post();
+ execInst->_semThreadCnt += 1;
+ DEBTRACE("after _semForMaxThreads.post " << execInst->_semThreadCnt);
+ if (execInst->_executorState != YACS::PAUSED) execInst->wakeUp();
+
execInst->_mutexForSchedulerUpdate.unlock();
- }//End of critical section
- execInst->wakeUp();
- execInst->notifyEndOfThread(0);
+ } // --- End of critical section (change state)
+
+ //execInst->notifyEndOfThread(0);
+ Thread::exit(0);
return 0;
}
+
+void Executor::traceExec(Task *task, const std::string& message)
+{
+ string nodeName = _mainSched->getTaskName(task);
+ _mutexForTrace.lock();
+ _trace << nodeName << " " << message << endl;
+ _trace << flush;
+ _mutexForTrace.unlock();
+}
+
+//! emit notification to all observers registered with the dispatcher
+/*!
+ * The dispatcher is unique and can be obtained by getDispatcher()
+ */
+void Executor::sendEvent(const std::string& event)
+{
+ Dispatcher* disp=Dispatcher::getDispatcher();
+ assert(disp);
+ assert(_root);
+ disp->dispatch(_root,event);
+}
