6 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
7 * See cxx source for full Copyright notice */
9 /** @file AliHLTSystem.h
10 @author Matthias Richter
12 @brief Global HLT module management and AliRoot integration.
13 @note The class is used in Offline (AliRoot) context
16 // see below for class documentation
18 // refer to README to build package
20 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
23 * @defgroup alihlt_system HLT integration into AliRoot
24 * This section describes the HLT integration into AliRoot.
27 #include "AliHLTLogging.h"
31 class AliHLTComponentHandler;
32 class AliHLTConfiguration;
33 class AliHLTConfigurationHandler;
43 * Main class for the HLT integration into AliRoot.
44 * The class handles a list of configurations. Configurations are translated
45 * into task lists which can be executed.
47 * @note This class is only used for the @ref alihlt_system.
49 * @ingroup alihlt_system
51 class AliHLTSystem : public AliHLTLogging {
53 /** default constructor */
56 virtual ~AliHLTSystem();
59 * Pointer to an instance of @ref AliHLTComponentHandler.
61 AliHLTComponentHandler* fpComponentHandler; //! transient
64 * Pointer to an instance of @ref AliHLTConfigurationHandler.
66 AliHLTConfigurationHandler* fpConfigurationHandler; //! transient
69 * Add a configuration to the end of the list.
70 * @param pConf pointer to configuration to add
72 int AddConfiguration(AliHLTConfiguration* pConf);
75 * Insert a configuration to the end of the list after the specified
77 * @param pConf pointer to configuration to insert
78 * @param pPrec pointer to configuration to insert the new one after
80 int InsertConfiguration(AliHLTConfiguration* pConf, AliHLTConfiguration* pPrec);
83 * Remove a configuration from the list.
84 * @param pConf pointer to configuration to delete
86 int DeleteConfiguration(AliHLTConfiguration* pConf);
90 * This method is used to build the tasks from the 'master' configuration
91 * objects which are added to the HLT system handler. This is an iterative
92 * process since the task might depend upon other configurations. For each
93 * configuration object which has not yet been converted into a task, the
94 * method will be called iteratively. Finally, after building all tasks which
95 * the current one depends on have been created, the task is inserted to the
96 * list of tasks with the InsertTask method.
97 * @param pConf configuration name/id
99 int BuildTaskList(const char* pConf);
102 * Build task list from a configuration object.
103 * This method is kept for backward compatibility. Use the version
104 * with the configuration name.
105 * @param pConf pointer to configuration to build the task list from
107 int BuildTaskList(AliHLTConfiguration* pConf);
110 * Clean the list of tasks and delete all the task objects.
115 * Insert a task to the task list.
116 * The method first checks whether all dependencies are resolved (i.e. exist
117 * already in the task list). During this iteration the cross links between
118 * the tasks are set as well. If all dependencies are resolved, the task is
119 * added at the end of the list.
120 * @param pTask pointer to task to add
122 int InsertTask(AliHLTTask* pTask);
125 * Find a task with an id.
126 * @param id CONFIGURATION id (not a COMPONENT id!)
128 AliHLTTask* FindTask(const char* id);
131 * Print the task list.
133 void PrintTaskList();
137 * The method checks whether the task list has already been build. If not,
138 * or the configuration list has been changed, the @ref BuildTaskList
140 * All tasks of the list will be subsequently processed for each event.
141 * @param iNofEvents number of events
142 * @return number of reconstructed events, neg error code if failed
144 int Run(Int_t iNofEvents=1);
147 * Init all tasks from the list.
148 * The @ref AliHLTTask::Init method is called for each task, the components
150 * @return neg error code if failed
155 * Init the stopwatches for all tasks.
156 * @param pStopwatches object array of stopwatches, for types
157 * @see AliHLTComponent::AliHLTStopwatchType
158 * @return neg error code if failed
160 int InitBenchmarking(TObjArray* pStopwatches);
164 * The @ref AliHLTTask::StartRun method is called for each task, the
165 * components will be prepared for event processing.
166 * @return neg error code if failed
172 * The @ref AliHLTTask::ProcessTask method is called for each task.
173 * @return neg error code if failed
175 int ProcessTasks(Int_t eventNo);
179 * The @ref AliHLTTask::EndRun method is called for each task, the components
180 * will be cleaned after event processing.
181 * @return neg error code if failed
186 * De-init all tasks from the list.
187 * The @ref AliHLTTask::Deinit method is called for each task, the components
189 * @return neg error code if failed
194 * The memory allocation function for components.
195 * This function is part of the running environment of the components.
197 static void* AllocMemory( void* param, unsigned long size );
200 * Reconstruction inside AliRoot.
201 * To be called by the AliHLTReconstructor plugin during the
202 * LocalReconstruction step of the AliRoot reconstruction. The latter means
203 * that all events are reconstructed at once, the event loop is internally
204 * implemented. In contrast to that, the FillESD method is called event by
205 * event. This requires an 'ESD' recorder at the end of the HLT chain, in
206 * order to have the reconstructed events available for the FillESD loop.
207 * The 'runLoader' and 'rawReader' parameters are set to all active
208 * AliHLTOfflineDataSource's and the HLT chain is processed for the given
209 * number of events. If the rawReader is NULL, reconstruction is done on
210 * simulated data, from real data if a RawReader is specified.
211 * @param nofEvents number of events
212 * @param runLoader the AliRoot runloader
213 * @param rawReader the AliRoot RawReader
214 * @return number of reconstructed events, neg. error code if failed
216 int Reconstruct(int nofEvents, AliRunLoader* runLoader,
217 AliRawReader* rawReader=NULL);
220 * Fill ESD for one event.
221 * To be called by the AliHLTReconstructor plugin during the event loop
222 * and FillESD method of the AliRoot reconstruction.
223 * This method is called on event basis, and thus must copy the previously
224 * reconstructed data of the event from the 'ESD' recorder. The FillESD
225 * method of all active AliHLTOfflineDataSink's is called.
226 * @param eventNo current event no (Note: this event number is just a
227 * processing counter and is not related to the nature/
228 * origin of the event
229 * @param runLoader the AliRoot runloader
230 * @param esd an AliESDEvent instance
231 * @return neg. error code if failed
233 int FillESD(int eventNo, AliRunLoader* runLoader, AliESDEvent* esd);
236 * Load component libraries.
237 * @param libs string of blank separated library names
238 * @return neg. error code if failed
240 int LoadComponentLibraries(const char* libs);
243 * Find a symbol in a dynamically loaded library.
244 * @param library library
245 * @param symbol the symbol to find
246 * @return void pointer to function
248 void* FindDynamicSymbol(const char* library, const char* symbol);
251 * Prepare the HLT system for running.
252 * - module agents are requested to register configurations
253 * - task lists are built from the top configurations of the modules
255 * @param runloader optional instance of the run loader
256 * @return neg. error code if failed <br>
257 * -EBUSY system is in kRunning state <br>
259 int Configure(AliRunLoader* runloader=NULL);
265 * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formating -->
266 * \li loglevel=<i>level</i> <br>
267 * logging level for this processing
269 * disable redirection of log messages to AliLog class
270 * \li config=<i>macro</i>
271 * configuration macro
272 * \li localrec=<i>configuration</i>
273 * comma separated list of configurations to be run during local
276 int ScanOptions(const char* options);
279 * Reset the HLT system.
280 * Reset is not possible while the system is in running state.
281 * @param bForce force the reset
282 * @return neg. error code if failed <br>
283 * -EBUSY system is in kRunning state <br>
285 int Reset(int bForce=0);
288 * Load the configurations specified by the module agents.
289 * The runLoader is passed to the agent and allows configuration
291 * @return neg. error code if failed
293 int LoadConfigurations(AliRunLoader* runloader=NULL);
296 * Get the top configurations of all agents and build the task lists.
297 * @return neg. error code if failed
299 int BuildTaskListsFromTopConfigurations(AliRunLoader* runloader=NULL);
301 enum AliHLTSystemState_t {
302 kUninitialized = 0x0,
303 kLibrariesLoaded = 0x1,
304 kConfigurationLoaded = 0x2,
305 kTaskListCreated = 0x4,
312 * Check status of the system.
313 * @param flag AliHLTSystemState_t value to check for
314 * @return 1 if set, 0 if not
316 int CheckStatus(int flag);
319 * Get the current status.
320 * @return status flags of @ref AliHLTSystemState_t
322 int GetStatusFlags();
327 /** copy constructor prohibited */
328 AliHLTSystem(const AliHLTSystem&);
329 /** assignment operator prohibited */
330 AliHLTSystem& operator=(const AliHLTSystem&);
335 int SetStatusFlags(int flags);
338 * clear status flags.
340 int ClearStatusFlags(int flags);
343 /* TList fConfList; */
344 /* int fbListChanged; */
347 TList fTaskList; // see above
349 /** the number of instances of AliHLTSystem */
350 static int fgNofInstances; // see above
352 /** state of the object */
353 int fState; // see above
355 /** configurations to be run during local reconstruction */
356 TString fLocalRec; //!transient
359 ClassDef(AliHLTSystem, 3);