5 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
6 * See cxx source for full Copyright notice */
8 /** @file AliHLTSystem.h
9 @author Matthias Richter
11 @brief Global HLT module management and AliRoot integration.
12 @note The class is used in Offline (AliRoot) context
16 * @defgroup alihlt_system HLT integration into AliRoot
17 * This section describes the HLT integration into AliRoot.
20 #include "AliHLTLogging.h"
23 class AliHLTComponentHandler;
24 class AliHLTConfiguration;
25 class AliHLTConfigurationHandler;
35 * Main class for the HLT integration into AliRoot.
36 * The class handles a list of configurations. Configurations are translated
37 * into task lists which can be executed.
39 * @note This class is only used for the @ref alihlt_system.
41 * @ingroup alihlt_system
43 class AliHLTSystem : public AliHLTLogging {
45 /** default constructor */
47 /** not a valid copy constructor, defined according to effective C++ style */
48 AliHLTSystem(const AliHLTSystem&);
49 /** not a valid assignment op, but defined according to effective C++ style */
50 AliHLTSystem& operator=(const AliHLTSystem&);
52 virtual ~AliHLTSystem();
55 * Pointer to an instance of @ref AliHLTComponentHandler.
57 AliHLTComponentHandler* fpComponentHandler; //! transient
60 * Pointer to an instance of @ref AliHLTConfigurationHandler.
62 AliHLTConfigurationHandler* fpConfigurationHandler; //! transient
65 * Add a configuration to the end of the list.
66 * @param pConf pointer to configuration to add
68 int AddConfiguration(AliHLTConfiguration* pConf);
71 * Insert a configuration to the end of the list after the specified
73 * @param pConf pointer to configuration to insert
74 * @param pPrec pointer to configuration to insert the new one after
76 int InsertConfiguration(AliHLTConfiguration* pConf, AliHLTConfiguration* pPrec);
79 * Remove a configuration from the list.
80 * @param pConf pointer to configuration to delete
82 int DeleteConfiguration(AliHLTConfiguration* pConf);
85 * Build a task list from a configuration object.
86 * This method is used to build the tasks from the 'master' configuration
87 * objects which are added to the HLT system handler. This is an iterative
88 * process since the task might depend upon other configurations. For each
89 * configuration object which has not yet been converted into a task, the
90 * method will be called iteratively. Finally, after building all tasks which
91 * the current one depends on have been created, the task is inserted to the
92 * list of tasks with the InsertTask method.
93 * @param pConf pointer to configuration to build the task list from
95 int BuildTaskList(AliHLTConfiguration* pConf);
98 * Clean the list of tasks and delete all the task objects.
103 * Insert a task to the task list.
104 * The method first checks whether all dependencies are resolved (i.e. exist
105 * already in the task list). During this iteration the cross links between
106 * the tasks are set as well. If all dependencies are resolved, the task is
107 * added at the end of the list.
108 * @param pTask pointer to task to add
110 int InsertTask(AliHLTTask* pTask);
113 * Find a task with an id.
114 * @param id CONFIGURATION id (not a COMPONENT id!)
116 AliHLTTask* FindTask(const char* id);
119 * Print the task list.
121 void PrintTaskList();
125 * The method checks whether the task list has already been build. If not,
126 * or the configuration list has been changed, the @ref BuildTaskList
128 * All tasks of the list will be subsequently processed for each event.
129 * @param iNofEvents number of events
130 * @return number of reconstructed events, neg error code if failed
132 int Run(Int_t iNofEvents=1);
135 * Init all tasks from the list.
136 * The @ref AliHLTTask::Init method is called for each task, the components
138 * @return neg error code if failed
143 * Init the stopwatches for all tasks.
144 * @param pStopwatches object array of stopwatches, for types
145 * @see AliHLTComponent::AliHLTStopwatchType
146 * @return neg error code if failed
148 int InitBenchmarking(TObjArray* pStopwatches);
152 * The @ref AliHLTTask::StartRun method is called for each task, the
153 * components will be prepared for event processing.
154 * @return neg error code if failed
160 * The @ref AliHLTTask::ProcessTask method is called for each task.
161 * @return neg error code if failed
163 int ProcessTasks(Int_t eventNo);
167 * The @ref AliHLTTask::EndRun method is called for each task, the components
168 * will be cleaned after event processing.
169 * @return neg error code if failed
174 * De-init all tasks from the list.
175 * The @ref AliHLTTask::Deinit method is called for each task, the components
177 * @return neg error code if failed
182 * The memory allocation function for components.
183 * This function is part of the running environment of the components.
185 static void* AllocMemory( void* param, unsigned long size );
188 * Reconstruction inside AliRoot.
189 * To be called by the AliHLTReconstructor plugin during the
190 * LocalReconstruction step of the AliRoot reconstruction. The latter means
191 * that all events are reconstructed at once, the event loop is internally
192 * implemented. In contrast to that, the FillESD method is called event by
193 * event. This requires an 'ESD' recorder at the end of the HLT chain, in
194 * order to have the reconstructed events available for the FillESD loop.
195 * The 'runLoader' and 'rawReader' parameters are set to all active
196 * AliHLTOfflineDataSource's and the HLT chain is processed for the given
197 * number of events. If the rawReader is NULL, reconstruction is done on
198 * simulated data, from real data if a RawReader is specified.
199 * @param nofEvents number of events
200 * @param runLoader the AliRoot runloader
201 * @param rawReader the AliRoot RawReader
202 * @return number of reconstructed events, neg. error code if failed
204 int Reconstruct(int nofEvents, AliRunLoader* runLoader,
205 AliRawReader* rawReader=NULL);
208 * Fill ESD for one event.
209 * To be called by the AliHLTReconstructor plugin during the event loop
210 * and FillESD method of the AliRoot reconstruction.
211 * This method is called on event basis, and thus must copy the previously
212 * reconstructed data of the event from the 'ESD' recorder. The FillESD
213 * method of all active AliHLTOfflineDataSink's is called.
214 * @param eventNo current event no (Note: this event number is just a
215 * processing counter and is not related to the nature/
216 * origin of the event
217 * @param runLoader the AliRoot runloader
218 * @param esd an AliESD instance
219 * @return neg. error code if failed
221 int FillESD(int eventNo, AliRunLoader* runLoader, AliESD* esd);
224 * Load component libraries.
225 * @param libs string of blank separated library names
226 * @return neg. error code if failed
228 int LoadComponentLibraries(const char* libs);
231 * Find a symbol in a dynamically loaded library.
232 * @param library library
233 * @param symbol the symbol to find
234 * @return void pointer to function
236 void* FindDynamicSymbol(const char* library, const char* symbol);
239 * Prepare the HLT system for running.
240 * - module agents are requested to register configurations
241 * - task lists are built from the top configurations of the modules
242 * @return neg. error code if failed <br>
243 * -EBUSY system is in kRunning state <br>
245 int Configure(AliRunLoader* runloader=NULL);
248 * Reset the HLT system.
249 * Reset is not possible while the system is in running state.
250 * @param bForce force the reset
251 * @return neg. error code if failed <br>
252 * -EBUSY system is in kRunning state <br>
254 int Reset(int bForce=0);
257 * Load the configurations specified by the module agents.
258 * The runLoader is passed to the agent and allows configuration
260 * @return neg. error code if failed
262 int LoadConfigurations(AliRunLoader* runloader=NULL);
265 * Get the top configurations of all agents and build the task lists.
266 * @return neg. error code if failed
268 int BuildTaskListsFromTopConfigurations(AliRunLoader* runloader=NULL);
270 enum AliHLTSystemState_t {
271 kUninitialized = 0x0,
272 kLibrariesLoaded = 0x1,
273 kConfigurationLoaded = 0x2,
274 kTaskListCreated = 0x4,
281 * Check status of the system.
282 * @param flag AliHLTSystemState_t value to check for
283 * @return 1 if set, 0 if not
285 int CheckStatus(int flag);
288 * Get the current status.
289 * @return status flags of @ref AliHLTSystemState_t
291 int GetStatusFlags();
299 int SetStatusFlags(int flags);
302 * clear status flags.
304 int ClearStatusFlags(int flags);
306 /* TList fConfList; */
307 /* int fbListChanged; */
310 TList fTaskList; // see above
312 /** the number of instances of AliHLTSystem */
313 static int fgNofInstances; // see above
315 /** state of the object */
316 int fState; // see above
319 ClassDef(AliHLTSystem, 2);