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);
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 configuration name/id
95 int BuildTaskList(const char* pConf);
98 * Build task list from a configuration object.
99 * This method is kept for backward compatibility. Use the version
100 * with the configuration name.
101 * @param pConf pointer to configuration to build the task list from
103 int BuildTaskList(AliHLTConfiguration* pConf);
106 * Clean the list of tasks and delete all the task objects.
111 * Insert a task to the task list.
112 * The method first checks whether all dependencies are resolved (i.e. exist
113 * already in the task list). During this iteration the cross links between
114 * the tasks are set as well. If all dependencies are resolved, the task is
115 * added at the end of the list.
116 * @param pTask pointer to task to add
118 int InsertTask(AliHLTTask* pTask);
121 * Find a task with an id.
122 * @param id CONFIGURATION id (not a COMPONENT id!)
124 AliHLTTask* FindTask(const char* id);
127 * Print the task list.
129 void PrintTaskList();
133 * The method checks whether the task list has already been build. If not,
134 * or the configuration list has been changed, the @ref BuildTaskList
136 * All tasks of the list will be subsequently processed for each event.
137 * @param iNofEvents number of events
138 * @return number of reconstructed events, neg error code if failed
140 int Run(Int_t iNofEvents=1);
143 * Init all tasks from the list.
144 * The @ref AliHLTTask::Init method is called for each task, the components
146 * @return neg error code if failed
151 * Init the stopwatches for all tasks.
152 * @param pStopwatches object array of stopwatches, for types
153 * @see AliHLTComponent::AliHLTStopwatchType
154 * @return neg error code if failed
156 int InitBenchmarking(TObjArray* pStopwatches);
160 * The @ref AliHLTTask::StartRun method is called for each task, the
161 * components will be prepared for event processing.
162 * @return neg error code if failed
168 * The @ref AliHLTTask::ProcessTask method is called for each task.
169 * @return neg error code if failed
171 int ProcessTasks(Int_t eventNo);
175 * The @ref AliHLTTask::EndRun method is called for each task, the components
176 * will be cleaned after event processing.
177 * @return neg error code if failed
182 * De-init all tasks from the list.
183 * The @ref AliHLTTask::Deinit method is called for each task, the components
185 * @return neg error code if failed
190 * The memory allocation function for components.
191 * This function is part of the running environment of the components.
193 static void* AllocMemory( void* param, unsigned long size );
196 * Reconstruction inside AliRoot.
197 * To be called by the AliHLTReconstructor plugin during the
198 * LocalReconstruction step of the AliRoot reconstruction. The latter means
199 * that all events are reconstructed at once, the event loop is internally
200 * implemented. In contrast to that, the FillESD method is called event by
201 * event. This requires an 'ESD' recorder at the end of the HLT chain, in
202 * order to have the reconstructed events available for the FillESD loop.
203 * The 'runLoader' and 'rawReader' parameters are set to all active
204 * AliHLTOfflineDataSource's and the HLT chain is processed for the given
205 * number of events. If the rawReader is NULL, reconstruction is done on
206 * simulated data, from real data if a RawReader is specified.
207 * @param nofEvents number of events
208 * @param runLoader the AliRoot runloader
209 * @param rawReader the AliRoot RawReader
210 * @return number of reconstructed events, neg. error code if failed
212 int Reconstruct(int nofEvents, AliRunLoader* runLoader,
213 AliRawReader* rawReader=NULL);
216 * Fill ESD for one event.
217 * To be called by the AliHLTReconstructor plugin during the event loop
218 * and FillESD method of the AliRoot reconstruction.
219 * This method is called on event basis, and thus must copy the previously
220 * reconstructed data of the event from the 'ESD' recorder. The FillESD
221 * method of all active AliHLTOfflineDataSink's is called.
222 * @param eventNo current event no (Note: this event number is just a
223 * processing counter and is not related to the nature/
224 * origin of the event
225 * @param runLoader the AliRoot runloader
226 * @param esd an AliESD instance
227 * @return neg. error code if failed
229 int FillESD(int eventNo, AliRunLoader* runLoader, AliESD* esd);
232 * Load component libraries.
233 * @param libs string of blank separated library names
234 * @return neg. error code if failed
236 int LoadComponentLibraries(const char* libs);
239 * Find a symbol in a dynamically loaded library.
240 * @param library library
241 * @param symbol the symbol to find
242 * @return void pointer to function
244 void* FindDynamicSymbol(const char* library, const char* symbol);
247 * Prepare the HLT system for running.
248 * - module agents are requested to register configurations
249 * - task lists are built from the top configurations of the modules
250 * @return neg. error code if failed <br>
251 * -EBUSY system is in kRunning state <br>
253 int Configure(AliRunLoader* runloader=NULL);
256 * Reset the HLT system.
257 * Reset is not possible while the system is in running state.
258 * @param bForce force the reset
259 * @return neg. error code if failed <br>
260 * -EBUSY system is in kRunning state <br>
262 int Reset(int bForce=0);
265 * Load the configurations specified by the module agents.
266 * The runLoader is passed to the agent and allows configuration
268 * @return neg. error code if failed
270 int LoadConfigurations(AliRunLoader* runloader=NULL);
273 * Get the top configurations of all agents and build the task lists.
274 * @return neg. error code if failed
276 int BuildTaskListsFromTopConfigurations(AliRunLoader* runloader=NULL);
278 enum AliHLTSystemState_t {
279 kUninitialized = 0x0,
280 kLibrariesLoaded = 0x1,
281 kConfigurationLoaded = 0x2,
282 kTaskListCreated = 0x4,
289 * Check status of the system.
290 * @param flag AliHLTSystemState_t value to check for
291 * @return 1 if set, 0 if not
293 int CheckStatus(int flag);
296 * Get the current status.
297 * @return status flags of @ref AliHLTSystemState_t
299 int GetStatusFlags();
307 int SetStatusFlags(int flags);
310 * clear status flags.
312 int ClearStatusFlags(int flags);
314 /* TList fConfList; */
315 /* int fbListChanged; */
318 TList fTaskList; // see above
320 /** the number of instances of AliHLTSystem */
321 static int fgNofInstances; // see above
323 /** state of the object */
324 int fState; // see above
327 ClassDef(AliHLTSystem, 2);