4 #ifndef ALIHLTCOMPONENT_H
5 #define ALIHLTCOMPONENT_H
6 //* This file is property of and copyright by the ALICE HLT Project *
7 //* ALICE Experiment at CERN, All rights reserved. *
8 //* See cxx source for full Copyright notice *
10 /** @file AliHLTComponent.h
11 @author Matthias Richter, Timm Steinbeck
13 @brief Base class declaration for HLT components.
14 @note The class is both used in Online (PubSub) and Offline (AliRoot)
19 * @defgroup alihlt_component Component handling of the HLT module
20 * This section describes the the component base classes and handling for
23 * @section alihlt_component_intro General remarks
24 * HLT analysis is organized in so called components. Each component can
25 * subscribe to the data produced by other components and can from the
26 * analysis publish new data for the subsequent components. Only the
27 * input data blocks and entries from CDB are available for the analysis.
29 * @section alihlt_component_implementation Component implementation
30 * AliHLTComponent provides the interface for all components, see there
31 * for details. Three types are provided:
36 * The two last represent data sinks and sources for the HLT integration
37 * into AliRoot. When running only, only the processors are relevant,
38 * sources and sinks are provided by the HLT PubSub framework. Please check
39 * AliHLTComponent for detailed description.
41 * @section alihlt_component_registration Component registration
42 * Components need to be registered with the AliHLTComponentHandler in
43 * order to be used with the system. Registration is purely done from the
44 * module library. Two methods are possible:
45 * - the module library implements an AliHLTModuleAgent and overloads the
46 * AliHLTModuleAgent::RegisterComponents() function
47 * - in the implementation file, one object is defined. The global object is
48 * automatically instantiated when the library is loaded for the first
49 * time and the object is used for registration.
51 * In both cases, the library must be loaded via the method
53 * AliHLTComponentHandler::LoadComponentLibraries()
55 * For the global object approach it is important that the library is
56 * not loaded elsewhere before (e.g. a gSystem->Load operation in your
64 #include "AliHLTLogging.h"
65 #include "AliHLTDataTypes.h"
66 #include "AliHLTCommonCDBEntries.h"
69 * The names have been changed for Aliroot's coding conventions sake
70 * The old names are defined for backward compatibility with the
71 * stand alone SampleLib package
73 typedef AliHLTComponentLogSeverity AliHLTComponent_LogSeverity;
74 typedef AliHLTComponentEventData AliHLTComponent_EventData;
75 typedef AliHLTComponentShmData AliHLTComponent_ShmData;
76 typedef AliHLTComponentDataType AliHLTComponent_DataType;
77 typedef AliHLTComponentBlockData AliHLTComponent_BlockData;
78 typedef AliHLTComponentTriggerData AliHLTComponent_TriggerData;
79 typedef AliHLTComponentEventDoneData AliHLTComponent_EventDoneData;
81 class AliHLTComponentHandler;
84 class AliHLTComponent;
85 class AliHLTMemoryFile;
87 /** list of component data type structures */
88 typedef vector<AliHLTComponentDataType> AliHLTComponentDataTypeList;
89 /** list of component block data structures */
90 typedef vector<AliHLTComponentBlockData> AliHLTComponentBlockDataList;
91 /** list of component statistics struct */
92 typedef vector<AliHLTComponentStatistics> AliHLTComponentStatisticsList;
93 /** list of component pointers */
94 typedef vector<AliHLTComponent*> AliHLTComponentPList;
95 /** list of memory file pointers */
96 typedef vector<AliHLTMemoryFile*> AliHLTMemoryFilePList;
99 * @class AliHLTComponent
100 * Base class of HLT data processing components.
101 * The class provides a common interface for HLT data processing components.
102 * The interface can be accessed from the online HLT framework or the AliRoot
103 * offline analysis framework.
104 * @section alihltcomponent-properties Component identification and properties
105 * Each component must provide a unique ID, input and output data type indications,
106 * and a spawn function.
107 * @subsection alihltcomponent-req-methods Required property methods
108 * - @ref GetComponentID
109 * - @ref GetInputDataTypes (see @ref alihltcomponent-type for default
111 * - @ref GetOutputDataType (see @ref alihltcomponent-type for default
113 * - @ref GetOutputDataSize (see @ref alihltcomponent-type for default
117 * @subsection alihltcomponent-opt-mehods Optional handlers
120 * - @ref GetOutputDataTypes
121 * If the component has multiple output data types @ref GetOutputDataType
122 * should return @ref kAliHLTMultipleDataType. The framework will invoke
123 * @ref GetOutputDataTypes, a list can be filled.
125 * @subsection alihltcomponent-processing-mehods Data processing
128 * @subsection alihltcomponent-type Component type
129 * Components can be of type
130 * - @ref kSource components which only produce data
131 * - @ref kProcessor components which consume and produce data
132 * - @ref kSink components which only consume data
134 * where data production and consumption refer to the analysis data stream. In
135 * order to indicate the type, a child component can overload the
136 * @ref GetComponentType function.
137 * @subsubsection alihltcomponent-type-std Standard implementations
138 * Components in general do not need to implement this function, standard
139 * implementations of the 3 types are available:
140 * - AliHLTDataSource for components of type @ref kSource <br>
141 * All types of data sources can inherit from AliHLTDataSource and must
142 * implement the @ref AliHLTDataSource::GetEvent method. The class
143 * also implements a standard method for @ref GetInputDataTypes.
145 * - AliHLTProcessor for components of type @ref kProcessor <br>
146 * All types of data processors can inherit from AliHLTProcessor and must
147 * implement the @ref AliHLTProcessor::DoEvent method.
149 * - AliHLTDataSink for components of type @ref kSink <br>
150 * All types of data processors can inherit from AliHLTDataSink and must
151 * implement the @ref AliHLTDataSink::DumpEvent method. The class
152 * also implements a standard method for @ref GetOutputDataType and @ref
155 * @subsection alihltcomponent-environment Running environment
157 * In order to adapt to different environments (on-line/off-line), the component
158 * gets an environment structure with function pointers. The base class provides
159 * member functions for those environment dependend functions. The member
160 * functions are used by the component implementation and are re-mapped to the
161 * corresponding functions.
163 * @section alihltcomponent-interfaces Component interfaces
164 * Each of the 3 standard component base classes AliHLTProcessor, AliHLTDataSource
165 * and AliHLTDataSink provides it's own processing method (see
166 * @ref alihltcomponent-type-std), which splits into a high and a low-level
167 * method. For the @ref alihltcomponent-low-level-interface, all parameters are
168 * shipped as function arguments, the component is supposed to write data to the
169 * output buffer and handle all block descriptors.
170 * The @ref alihltcomponent-high-level-interface is the standard processing
171 * method and will be used whenever the low-level method is not overloaded.
173 * In both cases it is necessary to calculate/estimate the size of the output
174 * buffer before the processing. Output buffers can never be allocated inside
175 * the component because of the push-architecture of the HLT.
176 * For that reason the @ref GetOutputDataSize function should return a rough
177 * estimatian of the data to be produced by the component. The component is
178 * responsible for checking the memory size and must return -ENOSPC if the
179 * available buffer is too small, and update the estimator respectively. The
180 * framework will allocate a buffer of appropriate size and call the processing
183 * @subsection alihltcomponent-error-codes Data processing
184 * For return codes, the following scheme applies:
185 * - The data processing methods have to indicate error conditions by a negative
186 * error/return code. Preferably the system error codes are used like
187 * e.g. -EINVAL. This requires to include the header
189 * \#include \<cerrno\>
191 * - If no suitable input block could be found (e.g. no clusters for the TPC cluster
192 * finder) set size to 0, block list is empty, return 0
193 * - If no ususable or significant signal could be found in the input blocks
194 * return an empty output block, set size accordingly, and return 0. An empty output
195 * block here could be either a real empty one of size 0 (in which case size also
196 * would have to be set to zero) or a block filled with just the minimum necessary
197 * accounting/meta-structures. E.g. in the TPC
199 * @subsection alihltcomponent-high-level-interface High-level interface
200 * The high-level component interface provides functionality to exchange ROOT
201 * structures between components. In contrast to the
202 * @ref alihltcomponent-low-level-interface, a couple of functions can be used
203 * to access data blocks of the input stream
204 * and send data blocks or ROOT TObject's to the output stream. The functionality
205 * is hidden from the user and is implemented by using ROOT's TMessage class.
207 * @subsubsection alihltcomponent-high-level-int-methods Interface methods
208 * The interface provides a couple of methods in order to get objects from the
209 * input, data blocks (non TObject) from the input, and to push back objects and
210 * data blocks to the output. For convenience there are several functions of
211 * identical name (and similar behavior) with different parameters defined.
212 * Please refer to the function documentation.
213 * - @ref GetNumberOfInputBlocks <br>
214 * return the number of data blocks in the input stream
215 * - @ref GetFirstInputObject <br>
216 * get the first object of a specific data type
217 * - @ref GetNextInputObject <br>
218 * get the next object of same data type as last GetFirstInputObject/Block call
219 * - @ref GetFirstInputBlock <br>
220 * get the first block of a specific data type
221 * - @ref GetNextInputBlock <br>
222 * get the next block of same data type as last GetFirstInputBlock/Block call
223 * - @ref PushBack <br>
224 * insert an object or data buffer into the output
225 * - @ref CreateEventDoneData <br>
226 * add event information to the output
228 * In addition, the processing methods are simplified a bit by cutting out most of
231 * - @ref AliHLTProcessor::DoEvent
232 * - @ref AliHLTDataSource::GetEvent
233 * - @ref AliHLTDataSink::DumpEvent
235 * \em IMPORTANT: objects and block descriptors provided by the high-level interface
236 * <b>MUST NOT BE DELETED</b> by the caller.
238 * @subsubsection alihltcomponent-high-level-int-guidelines High-level interface guidelines
239 * - Structures must inherit from the ROOT object base class TObject in order be
240 * transported by the transportation framework.
241 * - all pointer members must be transient (marked <tt>//!</tt> behind the member
242 * definition), i.e. will not be stored/transported, or properly marked
243 * (<tt>//-></tt>) in order to call the streamer of the object the member is pointing
244 * to. The latter is not recomended. Structures to be transported between components
245 * should be streamlined.
246 * - no use of stl vectors/strings, use appropriate ROOT classes instead
248 * @subsection alihltcomponent-low-level-interface Low-level interface
249 * The low-level component interface consists of the specific data processing
250 * methods for @ref AliHLTProcessor, @ref AliHLTDataSource, and @ref AliHLTDataSink.
251 * - @ref AliHLTProcessor::DoEvent
252 * - @ref AliHLTDataSource::GetEvent
253 * - @ref AliHLTDataSink::DumpEvent
256 * @section alihltcomponent-handling Component handling
257 * The handling of HLT analysis components is carried out by the AliHLTComponentHandler.
258 * Component are registered automatically at load-time of the component shared library
259 * under the following suppositions:
260 * - the component library has to be loaded from the AliHLTComponentHandler using the
261 * @ref AliHLTComponentHandler::LoadLibrary method.
262 * - the component implementation defines one global object (which is generated
263 * when the library is loaded)
265 * @subsection alihltcomponent-design-rules General design considerations
266 * The analysis code should be implemented in one or more destict class(es). A
267 * \em component should be implemented which interface the destict analysis code to the
268 * component interface. This component generates the analysis object dynamically. <br>
270 * Assume you have an implemetation <tt> AliHLTDetMyAnalysis </tt>, another class <tt>
271 * AliHLTDetMyAnalysisComponent </tt> contains:
274 * AliHLTDetMyAnalysis* fMyAnalysis; //!
276 * The object should then be instantiated in the DoInit handler of
277 * <tt>AliHLTDetMyAnalysisComponent </tt>, and cleaned in the DoDeinit handler.
280 * - avoid big static arrays in the component, allocate the memory at runtime
282 * @section alihlt_component_arguments Default arguments
283 * The component base class provides some default arguments:
284 * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting -->
285 * \li -loglevel=level <br>
286 * \li -object-compression=level <br>
287 * compression level for ROOT objects, default is defined by
288 * @ref ALIHLTCOMPONENT_DEFAULT_OBJECT_COMPRESSION
290 * @ingroup alihlt_component
291 * @section alihltcomponent-members Class members
293 class AliHLTComponent : public AliHLTLogging {
295 /** standard constructor */
297 /** standard destructor */
298 virtual ~AliHLTComponent();
300 /** component type definitions */
301 enum TComponentType { kUnknown=0, kSource=1, kProcessor=2, kSink=3 };
304 * Init function to prepare data processing.
305 * Initialization of common data structures for a sequence of events.
306 * The call is redirected to the internal method DoInit which can be
307 * overridden by the child class.
308 * During Init also the environment structure is passed to the component.
309 * @param comenv environment pointer with environment dependent function
311 * @param environParam additional parameter for function calls, the pointer
313 * @param argc size of the argument array
314 * @param argv augment array for component initialization
316 virtual int Init( const AliHLTAnalysisEnvironment* comenv, void* environParam, int argc, const char** argv );
319 * Clean-up function to terminate data processing.
320 * Clean-up of common data structures after data processing.
321 * The call is redirected to the internal method @ref DoDeinit which can be
322 * overridden by the child class.
324 virtual int Deinit();
327 * Processing of one event.
328 * The method is the entrance of the event processing. The parameters are
329 * cached for uses with the high-level interface and the DoProcessing
330 * implementation is called.
337 * @param outputBlockCnt out: size of the output block array, set by the component
338 * @param outputBlocks out: the output block array is allocated internally
340 * @return neg. error code if failed
342 int ProcessEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
343 AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr,
344 AliHLTUInt32_t& size, AliHLTUInt32_t& outputBlockCnt,
345 AliHLTComponentBlockData*& outputBlocks,
346 AliHLTComponentEventDoneData*& edd );
349 * Internal processing of one event.
350 * The method is pure virtual and implemented by the child classes
351 * - @ref AliHLTProcessor
352 * - @ref AliHLTDataSource
353 * - @ref AliHLTDataSink
360 * @param outputBlocks out: the output block array is allocated internally
362 * @return neg. error code if failed
364 virtual int DoProcessing( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
365 AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr,
366 AliHLTUInt32_t& size,
367 AliHLTComponentBlockDataList& outputBlocks,
368 AliHLTComponentEventDoneData*& edd ) = 0;
372 * The function must not be called when running in AliRoot unless it it
373 * really wanted. The CDB path will be set to the specified path, which might
374 * override the path initialized at the beginning of the AliRoot reconstruction.
376 * The method is used from the external interface in order to set the correct
377 * path when running on-line. The function also initializes the function
378 * callback for setting the run no during operation.
380 * A separation of library and component handling is maybe appropriate in the
381 * future. Using the global component handler here is maybe not the cleanest
383 * @param cdbPath path of the CDB
384 * @param pHandler the component handler used for llibrary handling.
386 int InitCDB(const char* cdbPath, AliHLTComponentHandler* pHandler);
389 * Set the run no for the CDB.
390 * The function must not be called when running in AliRoot unless it it
391 * really wanted. The CDB path will be set to the specified path, which might
392 * override the run no initialized at the beginning of the AliRoot reconstruction.
393 * InitCDB() has to be called before in order to really change the CDB settings.
395 * The method is used from the external interface in order to set the correct
396 * path when running on-line.
398 int SetCDBRunNo(int runNo);
401 * Set the run description.
402 * The run description is set before the call of Init() -> DoInit().
403 * @note: This functionality has been added in Juli 2008. The transmission of
404 * run properties by a special SOR (SOD event in DAQ terminalogy but this was
405 * changed after the HLT interface was designed) event is not sufficient because
406 * the data might be needed already in the DoInit handler of the component.
407 * @param desc run descriptor, currently only the run no member is used
408 * @param runType originally, run type was supposed to be a number and part
409 * of the run descriptor. But it was defined as string later
411 int SetRunDescription(const AliHLTRunDesc* desc, const char* runType);
414 * Set the component description.
415 * The description string can contain tokens separated by blanks, a token
416 * consists of a key and an optional value separated by '='.
418 * \li -chainid=id string id within the chain of the instance
420 * @param desc component description
422 int SetComponentDescription(const char* desc);
425 * Set the running environment for the component.
426 * Originally, the environment was set in the Init function. However, the setup of
427 * the CDB is required before. In order to have proper logging functionality, the
428 * environment is required.
429 * @param comenv environment pointer with environment dependent function
431 * @param environParam additional parameter for function calls, the pointer
434 int SetComponentEnvironment(const AliHLTAnalysisEnvironment* comenv, void* environParam);
436 // Information member functions for registration.
439 * Get the type of the component.
440 * The function is pure virtual and must be implemented by the child class.
441 * @return component type id
443 virtual TComponentType GetComponentType() = 0; // Source, sink, or processor
446 * Get the id of the component.
447 * Each component is identified by a unique id.
448 * The function is pure virtual and must be implemented by the child class.
449 * @return component id (string)
451 virtual const char* GetComponentID() = 0;
454 * Get the input data types of the component.
455 * The function is pure virtual and must be implemented by the child class.
456 * @return list of data types in the vector reference
458 virtual void GetInputDataTypes( AliHLTComponentDataTypeList& ) = 0;
461 * Get the output data type of the component.
462 * The function is pure virtual and must be implemented by the child class.
463 * @return output data type
465 virtual AliHLTComponentDataType GetOutputDataType() = 0;
468 * Get the output data types of the component.
469 * The function can be implemented to indicate multiple output data types
470 * in the target array.
471 * @ref GetOutputDataType must return @ref kAliHLTMultipleDataType in order
472 * to invoke this method.
473 * @param tgtList list to receive the data types
474 * @return no of output data types, data types in the target list
476 virtual int GetOutputDataTypes(AliHLTComponentDataTypeList& tgtList);
479 * Get a ratio by how much the data volume is shrunken or enhanced.
480 * The function is pure virtual and must be implemented by the child class.
481 * @param constBase <i>return</i>: additive part, independent of the
483 * @param inputMultiplier <i>return</i>: multiplication ratio
484 * @return values in the reference variables
486 virtual void GetOutputDataSize( unsigned long& constBase, double& inputMultiplier ) = 0;
490 * Each component must implement a spawn function to create a new instance of
491 * the class. Basically the function must return <i>new <b>my_class_name</b></i>.
492 * @return new class instance
494 virtual AliHLTComponent* Spawn() = 0;
497 * Find matching data types between this component and a consumer component.
498 * Currently, a component can produce only one type of data. This restriction is most
499 * likely to be abolished in the future.
500 * @param pConsumer a component and consumer of the data produced by this component
501 * @param tgtList reference to a vector list to receive the matching data types.
502 * @return >= 0 success, neg. error code if failed
504 int FindMatchingDataTypes(AliHLTComponent* pConsumer, AliHLTComponentDataTypeList* tgtList);
507 * Set the global component handler.
508 * The static method is needed for the automatic registration of components.
510 static int SetGlobalComponentHandler(AliHLTComponentHandler* pCH, int bOverwrite=0);
513 * Clear the global component handler.
514 * The static method is needed for the automatic registration of components.
516 static int UnsetGlobalComponentHandler();
519 * Helper function to convert the data type to a string.
520 * @param type data type structure
521 * @param mode 0 print string origin:type <br>
525 static string DataType2Text( const AliHLTComponentDataType& type, int mode=0);
528 * Calculate a CRC checksum of a data buffer.
529 * Polynomial for the calculation is 0xD8.
531 static AliHLTUInt32_t CalculateChecksum(const AliHLTUInt8_t* buffer, int size);
534 * Helper function to print content of data type.
536 static void PrintDataTypeContent(AliHLTComponentDataType& dt, const char* format=NULL);
539 * helper function to initialize AliHLTComponentEventData structure
541 static void FillEventData(AliHLTComponentEventData& evtData);
544 * Print info on an AliHLTComponentDataType structure
545 * This is just a helper function to examine an @ref AliHLTComponentDataType
548 static void PrintComponentDataTypeInfo(const AliHLTComponentDataType& dt);
551 * Fill AliHLTComponentBlockData structure with default values.
552 * @param blockData reference to data structure
554 static void FillBlockData( AliHLTComponentBlockData& blockData );
557 * Fill AliHLTComponentShmData structure with default values.
558 * @param shmData reference to data structure
560 static void FillShmData( AliHLTComponentShmData& shmData );
563 * Fill AliHLTComponentDataType structure with default values.
564 * @param dataType reference to data structure
566 static void FillDataType( AliHLTComponentDataType& dataType );
569 * Copy data type structure
570 * Copies the value an AliHLTComponentDataType structure to another one
571 * @param[out] tgtdt target structure
572 * @param[in] srcdt source structure
574 static void CopyDataType(AliHLTComponentDataType& tgtdt, const AliHLTComponentDataType& srcdt);
577 * Set the ID and Origin of an AliHLTComponentDataType structure.
578 * The function sets the fStructureSize member and copies the strings
579 * to the ID and Origin. Only characters from the valid part of the string
580 * are copied, the rest is filled with 0's. <br>
581 * Please note that the fID and fOrigin members are not strings, just arrays of
582 * chars of size @ref kAliHLTComponentDataTypefIDsize and
583 * @ref kAliHLTComponentDataTypefOriginSize respectively and not necessarily with
584 * a terminating zero. <br>
585 * It is possible to pass NULL pointers as id or origin argument, in that case they
587 * @param tgtdt target data type structure
588 * @param id ID string
589 * @param origin Origin string
591 static void SetDataType(AliHLTComponentDataType& tgtdt, const char* id, const char* origin);
594 * Set the ID and Origin of an AliHLTComponentDataType structure.
595 * Given the fact that the data type ID is 64bit wide and origin 32, this helper
596 * function sets the data type from those two parameters.
597 * @param dt target data type structure
599 * @param orig 32bit origin
601 static void SetDataType(AliHLTComponentDataType& dt, AliHLTUInt64_t id, AliHLTUInt32_t orig);
604 * Extract a component table entry from the payload buffer.
605 * The entry consists of the AliHLTComponentTableEntry structure, the array of
606 * parents and a description string of the format 'chain-id{component-id:component-args}'.
607 * The function fills all the variables after a consistency check.
609 static int ExtractComponentTableEntry(const AliHLTUInt8_t* pBuffer, AliHLTUInt32_t size,
610 string& chainId, string& compId, string& compParam,
611 vector<AliHLTUInt32_t>& parents);
613 * Stopwatch type for benchmarking.
615 enum AliHLTStopwatchType {
616 /** total time for event processing */
618 /** detector algorithm w/o interface callbacks */
624 /** number of types */
629 * Helper class for starting and stopping a stopwatch.
630 * The guard can be used by instantiating an object in a function. The
631 * specified stopwatch is started and the previous stopwatch put on
632 * hold. When the function is terminated, the object is deleted automatically
633 * deleted, stopping the stopwatch and starting the one on hold.<br>
634 * \em IMPORTANT: never create dynamic objects from this guard as this violates
635 * the idea of a guard.
637 class AliHLTStopwatchGuard {
639 /** standard constructor (not for use) */
640 AliHLTStopwatchGuard();
642 AliHLTStopwatchGuard(TStopwatch* pStart);
643 /** copy constructor (not for use) */
644 AliHLTStopwatchGuard(const AliHLTStopwatchGuard&);
645 /** assignment operator (not for use) */
646 AliHLTStopwatchGuard& operator=(const AliHLTStopwatchGuard&);
648 ~AliHLTStopwatchGuard();
652 * Hold the previous guard for the existence of this guard.
653 * Checks whether this guard controls a new stopwatch. In that case, the
654 * previous guard and its stopwatch are put on hold.
655 * @param pSucc instance of the stopwatch of the new guard
656 * @return 1 if pSucc is a different stopwatch which should
658 * 0 if it controls the same stopwatch
660 int Hold(TStopwatch* pSucc);
663 * Resume the previous guard.
664 * Checks whether the peceeding guard controls a different stopwatch. In that
665 * case, the its stopwatch is resumed.
666 * @param pSucc instance of the stopwatch of the new guard
667 * @return 1 if pSucc is a different stopwatch which should
669 * 0 if it controls the same stopwatch
671 int Resume(TStopwatch* pSucc);
673 /** the stopwatch controlled by this guard */
674 TStopwatch* fpStopwatch; //!transient
676 /** previous stopwatch guard, put on hold during existence of the guard */
677 AliHLTStopwatchGuard* fpPrec; //!transient
679 /** active stopwatch guard */
680 static AliHLTStopwatchGuard* fgpCurrent; //!transient
684 * Set a stopwatch for a given purpose.
685 * @param pSW stopwatch object
686 * @param type type of the stopwatch
688 int SetStopwatch(TObject* pSW, AliHLTStopwatchType type=kSWBase);
691 * Init a set of stopwatches.
692 * @param pStopwatches object array of stopwatches
694 int SetStopwatches(TObjArray* pStopwatches);
697 * Customized logging function.
698 * The chain id, component id and pointer is added at the beginning of each message.
700 int LoggingVarargs(AliHLTComponentLogSeverity severity,
701 const char* originClass, const char* originFunc,
702 const char* file, int line, ... ) const;
705 * Get size of last serialized object.
706 * During PushBack, TObjects are serialized in a separate buffer. The
707 * size of the last object can be retrieved by this function.
709 * This might be especially useful for PushBack failures caused by too
710 * small output buffer.
712 int GetLastObjectSize() const {return fLastObjectSize;}
717 * Default method for the internal initialization.
718 * The method is called by @ref Init
720 virtual int DoInit( int argc, const char** argv );
723 * Default method for the internal clean-up.
724 * The method is called by @ref Deinit
726 virtual int DoDeinit();
729 * Reconfigure the component.
730 * The method is called when an event of type @ref kAliHLTDataTypeComConf
731 * {COM_CONF:PRIV} is received by the component. If the event is sent as
732 * part of a normal event, the component configuration is called first.
734 * The CDB path parameter specifies the path in the CDB, i.e. without
735 * leading absolute path of the CDB location. The framework might also
736 * provide the id of the component in the analysis chain.
738 * \b Note: The CDB will be initialized by the framework, either already set
739 * from AliRoot or from the wrapper interface during initialization.
741 * @param cdbEntry path of the cdbEntry
742 * @param chainId the id/name of the component in the current analysis
743 * chain. This is not necessarily the same as what is
744 * returned by the GetComponentID() method.
745 * @note both parameters can be NULL, check before usage
747 virtual int Reconfigure(const char* cdbEntry, const char* chainId);
750 * Read the Preprocessor values.
751 * The function is invoked when the component is notified about available/
752 * updated data points from the detector Preprocessors. The 'modules'
753 * argument contains all detectors for which the Preprocessors have
754 * updated data points. The component has to implement the CDB access to
755 * get the desired data points.
756 * @param modules detectors for which the Preprocessors have updated
757 * data points: TPC, TRD, ITS, PHOS, MUON, or ALL if
758 * no argument was received.
759 * @return neg. error code if failed
761 virtual int ReadPreprocessorValues(const char* modules);
764 * Custom handler for the SOR event.
765 * Is invoked from the base class if an SOR event is in the block list.
766 * The handler is called before the processing function. The processing
767 * function is skipped if there are no other data blocks available.
769 * The SOR event is generated by the PubSub framework in response to
770 * the DAQ start of data (SOD - has been renamed after HLT interface
771 * was designed). The SOD event consists of 3 blocks:
772 * - ::kAliHLTDataTypeEvent block: spec ::gkAliEventTypeStartOfRun
773 * - SOD block of type ::kAliHLTDataTypeSOR, payload: AliHLTRunDesc struct
774 * - run type block ::kAliHLTDataTypeRunType, payload: run type string
776 * Run properties can be retrieved by getters like GetRunNo().
777 * @return neg. error code if failed
779 virtual int StartOfRun();
782 * Custom handler for the EOR event.
783 * Is invoked from the base class if an EOR event is in the block list.
784 * The handler is called before the processing function. The processing
785 * function is skipped if there are no other data blocks available.
787 * See StartOfRun() for more comments of the sequence of steering events.
789 * @return neg. error code if failed
791 virtual int EndOfRun();
794 * Check whether a component requires all steering blocks.
795 * Childs can overload in order to indicate that they want to
796 * receive also the steering data blocks. There is also the
797 * possibility to add the required data types to the input
798 * data type list in GetInputDataTypes().
800 virtual bool RequireSteeringBlocks() const {return false;}
803 * General memory allocation method.
804 * All memory which is going to be used 'outside' of the interface must
805 * be provided by the framework (online or offline).
806 * The method is redirected to a function provided by the current
807 * framework. Function pointers are transferred via the @ref
808 * AliHLTAnalysisEnvironment structure.
810 void* AllocMemory( unsigned long size );
813 * Helper function to create a monolithic BlockData description block out
814 * of a list BlockData descriptors.
815 * For convenience, inside the interface vector lists are used, to make the
816 * interface pure C style, monilithic blocks must be exchanged.
817 * The method is redirected to a function provided by the current
818 * framework. Function pointers are transferred via the @ref
819 * AliHLTAnalysisEnvironment structure.
821 int MakeOutputDataBlockList( const AliHLTComponentBlockDataList& blocks, AliHLTUInt32_t* blockCount,
822 AliHLTComponentBlockData** outputBlocks );
825 * Fill the EventDoneData structure.
826 * The method is redirected to a function provided by the current
827 * framework. Function pointers are transferred via the @ref
828 * AliHLTAnalysisEnvironment structure.
830 int GetEventDoneData( unsigned long size, AliHLTComponentEventDoneData** edd );
833 * Allocate an EventDoneData structure for the current event .
834 * The method allocates the memory internally and does not interact with the current Framework.
835 * The allocated data structure is empty initially and can be filled by calls to the
836 * @ref PushEventDoneData method. The memory will be automatically released after the event has been processed.
839 int ReserveEventDoneData( unsigned long size );
842 * Push a 32 bit word of data into event done data for the current event which
843 * has previously been allocated by the @ref ReserveEventDoneData method.
845 int PushEventDoneData( AliHLTUInt32_t eddDataWord );
848 * Release event done data previously reserved by @ref ReserveEventDoneData
850 void ReleaseEventDoneData();
853 * Get the pointer to the event done data available/built so far for the current event via
854 * @ref ReserveEventDoneData and @ref PushEventDoneData
856 AliHLTComponentEventDoneData* GetCurrentEventDoneData()
858 return fEventDoneData;
862 * Helper function to convert the data type to a string.
864 void DataType2Text(const AliHLTComponentDataType& type, char output[kAliHLTComponentDataTypefIDsize+kAliHLTComponentDataTypefOriginSize+2]) const;
868 * @return value of the internal event counter
870 int GetEventCount() const;
873 * Get the number of input blocks.
874 * @return number of input blocks
876 int GetNumberOfInputBlocks() const;
879 * Get id of the current event
882 AliHLTEventID_t GetEventId() const;
885 * Get the first object of a specific data type from the input data.
886 * The High-level methods provide functionality to transfer ROOT data
887 * structures which inherit from TObject.
889 * The method looks for the first ROOT object of type dt in the input stream.
890 * If also the class name is provided, the object is checked for the right
891 * class type. The input data block needs a certain structure, namely the
892 * buffer size as first word. If the cross check fails, the retrieval is
893 * silently abandoned, unless the \em bForce parameter is set.<br>
894 * \b Note: THE OBJECT MUST NOT BE DELETED by the caller.
896 * If called without parameters, the function tries to create objects from
897 * all available input blocks, also the ones of data type kAliHLTVoidDataType
898 * which are not matched by kAliHLTAnyDataType.
900 * @param dt data type of the object
901 * @param classname class name of the object
902 * @param bForce force the retrieval of an object, error messages
903 * are suppressed if \em bForce is not set
904 * @return pointer to @ref TObject, NULL if no objects of specified type
907 const TObject* GetFirstInputObject(const AliHLTComponentDataType& dt=kAliHLTAllDataTypes,
908 const char* classname=NULL,
912 * Get the first object of a specific data type from the input data.
913 * The High-level methods provide functionality to transfer ROOT data
914 * structures which inherit from TObject.
915 * The method looks for the first ROOT object of type specified by the ID and
916 * Origin strings in the input stream.
917 * If also the class name is provided, the object is checked for the right
918 * class type. The input data block needs a certain structure, namely the
919 * buffer size as first word. If the cross check fails, the retrieval is
920 * silently abandoned, unless the \em bForce parameter is set.<br>
921 * \em Note: THE OBJECT MUST NOT BE DELETED by the caller.
922 * @param dtID data type ID of the object
923 * @param dtOrigin data type origin of the object
924 * @param classname class name of the object
925 * @param bForce force the retrieval of an object, error messages
926 * are suppressed if \em bForce is not set
927 * @return pointer to @ref TObject, NULL if no objects of specified type
930 const TObject* GetFirstInputObject(const char* dtID,
931 const char* dtOrigin,
932 const char* classname=NULL,
936 * Get the next object of a specific data type from the input data.
937 * The High-level methods provide functionality to transfer ROOT data
938 * structures which inherit from TObject.
939 * The method looks for the next ROOT object of type and class specified
940 * to the previous @ref GetFirstInputObject call.<br>
941 * \em Note: THE OBJECT MUST NOT BE DELETED by the caller.
942 * @param bForce force the retrieval of an object, error messages
943 * are suppressed if \em bForce is not set
944 * @return pointer to @ref TObject, NULL if no more objects available
946 const TObject* GetNextInputObject(int bForce=0);
949 * Get data type of an input block.
950 * Get data type of the object previously fetched via
951 * GetFirstInputObject/NextInputObject or the last one if no object
953 * @param pObject pointer to TObject
954 * @return data specification, kAliHLTVoidDataSpec if failed
956 AliHLTComponentDataType GetDataType(const TObject* pObject=NULL);
959 * Get data specification of an input block.
960 * Get data specification of the object previously fetched via
961 * GetFirstInputObject/NextInputObject or the last one if no object
963 * @param pObject pointer to TObject
964 * @return data specification, kAliHLTVoidDataSpec if failed
966 AliHLTUInt32_t GetSpecification(const TObject* pObject=NULL);
969 * Get the first block of a specific data type from the input data.
970 * The method looks for the first block of type dt in the input stream.
971 * It is intended to be used within the high-level interface.<br>
972 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
974 * If called without parameters, the function works on all input blocks,
975 * also the ones of data type kAliHLTVoidDataType which are not matched by
976 * kAliHLTAnyDataType.
978 * @param dt data type of the block
979 * @return pointer to @ref AliHLTComponentBlockData
981 const AliHLTComponentBlockData* GetFirstInputBlock(const AliHLTComponentDataType& dt=kAliHLTAllDataTypes);
984 * Get the first block of a specific data type from the input data.
985 * The method looks for the first block of type specified by the ID and
986 * Origin strings in the input stream. It is intended
987 * to be used within the high-level interface.<br>
988 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
989 * @param dtID data type ID of the block
990 * @param dtOrigin data type origin of the block
991 * @return pointer to @ref AliHLTComponentBlockData
993 const AliHLTComponentBlockData* GetFirstInputBlock(const char* dtID,
994 const char* dtOrigin);
997 * Get input block by index.<br>
998 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
999 * @return pointer to AliHLTComponentBlockData, NULL if index out of range
1001 const AliHLTComponentBlockData* GetInputBlock(int index) const;
1004 * Get the next block of a specific data type from the input data.
1005 * The method looks for the next block of type and class specified
1006 * to the previous @ref GetFirstInputBlock call.
1007 * To be used within the high-level interface.<br>
1008 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
1010 const AliHLTComponentBlockData* GetNextInputBlock();
1013 * Get data specification of an input block.
1014 * Get data specification of the input block previously fetched via
1015 * GetFirstInputObject/NextInputObject or the last one if no block
1017 * @param pBlock pointer to input block
1018 * @return data specification, kAliHLTVoidDataSpec if failed
1020 AliHLTUInt32_t GetSpecification(const AliHLTComponentBlockData* pBlock);
1023 * Forward an input object to the output.
1024 * Forward the input block of an object previously fetched via
1025 * GetFirstInputObject/NextInputObject or the last one if no object
1027 * The block descriptor of the input block is forwarded to the
1028 * output block list.
1029 * @param pObject pointer to TObject
1030 * @return neg. error code if failed
1032 int Forward(const TObject* pObject);
1035 * Forward an input block to the output.
1036 * Forward the input block fetched via GetFirstInputObject/
1037 * NextInputBlock or the last one if no block specified.
1038 * The block descriptor of the input block is forwarded to the
1039 * output block list.
1040 * @param pBlock pointer to input block
1041 * @return neg. error code if failed
1043 int Forward(const AliHLTComponentBlockData* pBlock=NULL);
1046 * Insert an object into the output.
1047 * If header is specified, it will be inserted before the root object,
1048 * default is no header.
1049 * @param pObject pointer to root object
1050 * @param dt data type of the object
1051 * @param spec data specification
1052 * @param pHeader pointer to header
1053 * @param headerSize size of Header
1054 * @return neg. error code if failed
1056 int PushBack(TObject* pObject, const AliHLTComponentDataType& dt,
1057 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1058 void* pHeader=NULL, int headerSize=0);
1061 * Insert an object into the output.
1062 * If header is specified, it will be inserted before the root object,
1063 * default is no header.
1064 * @param pObject pointer to root object
1065 * @param dtID data type ID of the object
1066 * @param dtOrigin data type origin of the object
1067 * @param spec data specification
1068 * @param pHeader pointer to header
1069 * @param headerSize size of Header
1070 * @return neg. error code if failed
1072 int PushBack(TObject* pObject, const char* dtID, const char* dtOrigin,
1073 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1074 void* pHeader=NULL, int headerSize=0);
1077 * Insert an object into the output.
1078 * @param pBuffer pointer to buffer
1079 * @param iSize size of the buffer
1080 * @param dt data type of the object
1081 * @param spec data specification
1082 * @param pHeader pointer to header
1083 * @param headerSize size of Header
1084 * @return neg. error code if failed
1086 int PushBack(const void* pBuffer, int iSize, const AliHLTComponentDataType& dt,
1087 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1088 const void* pHeader=NULL, int headerSize=0);
1091 * Insert an object into the output.
1092 * @param pBuffer pointer to buffer
1093 * @param iSize size of the buffer
1094 * @param dtID data type ID of the object
1095 * @param dtOrigin data type origin of the object
1096 * @param spec data specification
1097 * @param pHeader pointer to header
1098 * @param headerSize size of Header
1099 * @return neg. error code if failed
1101 int PushBack(const void* pBuffer, int iSize, const char* dtID, const char* dtOrigin,
1102 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1103 const void* pHeader=NULL, int headerSize=0);
1106 * Estimate size of a TObject
1108 * @return buffer size in byte
1110 int EstimateObjectSize(TObject* pObject) const;
1113 * Create a memory file in the output stream.
1114 * This method creates a TFile object which stores all data in
1115 * memory instead of disk. The TFile object is published as binary data.
1116 * The instance can be used like a normal TFile object. The TFile::Close
1117 * or @ref CloseMemoryFile method has to be called in order to flush the
1120 * \b Note: The returned object is deleted by the framework.
1121 * @param capacity total size reserved for the memory file
1122 * @param dtID data type ID of the file
1123 * @param dtOrigin data type origin of the file
1124 * @param spec data specification
1125 * @return file handle, NULL if failed
1127 AliHLTMemoryFile* CreateMemoryFile(int capacity, const char* dtID, const char* dtOrigin,
1128 AliHLTUInt32_t spec=kAliHLTVoidDataSpec);
1131 * Create a memory file in the output stream.
1132 * This method creates a TFile object which stores all data in
1133 * memory instead of disk. The TFile object is published as binary data.
1134 * The instance can be used like a normal TFile object. The TFile::Close
1135 * or @ref CloseMemoryFile method has to be called in order to flush the
1138 * \b Note: The returned object is deleted by the framework.
1139 * @param capacity total size reserved for the memory file
1140 * @param dt data type of the file
1141 * @param spec data specification
1142 * @return file handle, NULL if failed
1144 AliHLTMemoryFile* CreateMemoryFile(int capacity,
1145 const AliHLTComponentDataType& dt=kAliHLTAnyDataType,
1146 AliHLTUInt32_t spec=kAliHLTVoidDataSpec);
1149 * Create a memory file in the output stream.
1150 * This method creates a TFile object which stores all data in
1151 * memory instead of disk. The TFile object is published as binary data.
1152 * The instance can be used like a normal TFile object. The TFile::Close
1153 * or @ref CloseMemoryFile method has to be called in order to flush the
1156 * \b Note: The returned object is deleted by the framework.
1157 * @param dtID data type ID of the file
1158 * @param dtOrigin data type origin of the file
1159 * @param spec data specification
1160 * @param capacity fraction of the available output buffer size
1161 * @return file handle, NULL if failed
1163 AliHLTMemoryFile* CreateMemoryFile(const char* dtID, const char* dtOrigin,
1164 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1165 float capacity=1.0);
1168 * Create a memory file in the output stream.
1169 * This method creates a TFile object which stores all data in
1170 * memory instead of disk. The TFile object is published as binary data.
1171 * The instance can be used like a normal TFile object. The TFile::Close
1172 * or @ref CloseMemoryFile method has to be called in order to flush the
1175 * \b Note: The returned object is deleted by the framework.
1176 * @param dt data type of the file
1177 * @param spec data specification
1178 * @param capacity fraction of the available output buffer size
1179 * @return file handle, NULL if failed
1181 AliHLTMemoryFile* CreateMemoryFile(const AliHLTComponentDataType& dt=kAliHLTAnyDataType,
1182 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1183 float capacity=1.0);
1186 * Write an object to memory file in the output stream.
1187 * @param pFile file handle
1188 * @param pObject pointer to root object
1189 * @param key key in ROOT file
1190 * @param option options, see TObject::Write
1191 * @return neg. error code if failed
1192 * - -ENOSPC no space left
1194 int Write(AliHLTMemoryFile* pFile, const TObject* pObject, const char* key=NULL, int option=TObject::kOverwrite);
1197 * Close object memory file.
1198 * @param pFile file handle
1199 * @return neg. error code if failed
1200 * - -ENOSPC buffer size too small
1202 int CloseMemoryFile(AliHLTMemoryFile* pFile);
1205 * Insert event-done data information into the output.
1206 * @param edd event-done data information
1208 int CreateEventDoneData(AliHLTComponentEventDoneData edd);
1211 * Get current run number
1213 AliHLTUInt32_t GetRunNo() const;
1216 * Get the current run type.
1218 AliHLTUInt32_t GetRunType() const;
1221 * Get the chain id of the component.
1223 const char* GetChainId() const {return fChainId.c_str();}
1226 * Check whether the current event is a valid data event.
1227 * @param pTgt optional pointer to get the event type
1228 * @return true if the current event is a real data event
1230 bool IsDataEvent(AliHLTUInt32_t* pTgt=NULL);
1233 * Set a bit to 1 in a readout list ( = AliHLTEventDDL )
1234 * -> enable DDL for readout
1235 * @param list readout list
1236 * @param ddlId DDL Id to be turned on ( Decimal )
1238 void EnableDDLBit(AliHLTEventDDL &list, Int_t ddlId ) const {
1239 SetDDLBit( list, ddlId, kTRUE );
1243 * Set a bit to 0 in a readout list ( = AliHLTEventDDL )
1244 * -> disable DDL for readout
1245 * @param list readout list
1246 * @param ddlId DDL Id to be turned on ( Decimal )
1248 void DisableDDLBit(AliHLTEventDDL &list, Int_t ddlId ) const {
1249 SetDDLBit( list, ddlId, kFALSE );
1253 * Set or unset bit a readout list ( = AliHLTEventDDL )
1254 * -> enable or disable DDL for readout
1255 * @param list readout list
1256 * @param ddlId DDL Id to be turned on ( Decimal )
1257 * @param state kTRUE sets it, kFALSE unsets it
1259 void SetDDLBit(AliHLTEventDDL &list, Int_t ddlId, Bool_t state ) const;
1262 * Get the first word of a detector, which has a set DDL bit.
1263 * Beware, this only works if DDLs of 1 detector are set. In the
1264 * case of the TPC and TOF, which use 8 and 3 words, the first
1266 * @param list readout list
1267 * @return returns the detector index, -1 if no bit is set
1268 * at all or several detectors (=error)
1270 Int_t GetFirstUsedDDLWord(AliHLTEventDDL &list) const;
1273 * Copy a struct from block data.
1274 * The function checks for block size and struct size. The least common
1275 * size will be copied to the target struct, remaining fields are initialized
1277 * The target struct must have a 32bit struct size indicator as first member.
1278 * @param pStruct target struct
1279 * @param iStructSize size of the struct
1280 * @param iBlockNo index of input block
1281 * @param structname name of the struct (log messages)
1282 * @param eventname name of the event (log messages)
1283 * @return size copied, neg. error if failed
1285 int CopyStruct(void* pStruct, unsigned int iStructSize, unsigned int iBlockNo,
1286 const char* structname="", const char* eventname="");
1289 /** copy constructor prohibited */
1290 AliHLTComponent(const AliHLTComponent&);
1291 /** assignment operator prohibited */
1292 AliHLTComponent& operator=(const AliHLTComponent&);
1295 * Increment the internal event counter.
1296 * To be used by the friend classes AliHLTProcessor, AliHLTDataSource
1297 * and AliHLTDataSink.
1298 * @return new value of the internal event counter
1301 int IncrementEventCounter();
1304 * Find the first input block of specified data type beginning at index.
1305 * Input blocks containing a TObject have the size of the object as an
1306 * unsigned 32 bit number in the first 4 bytes. This has to match the block
1309 * kAliHLTAllDataTypes is a special data type which includes both
1310 * kAliHLTVoidDataType and kAliHLTAnyDataType.
1312 * @param dt data type
1313 * @param startIdx index to start the search
1314 * @param bObject check if this is an object
1315 * @return index of the block, -ENOENT if no block found
1319 int FindInputBlock(const AliHLTComponentDataType& dt, int startIdx=-1, int bObject=0) const;
1322 * Get index in the array of input bocks.
1323 * Calculate index and check integrety of a block data structure pointer.
1324 * @param pBlock pointer to block data
1325 * @return index of the block, -ENOENT if no block found
1329 int FindInputBlock(const AliHLTComponentBlockData* pBlock) const;
1332 * Create an object from a specified input block.
1333 * @param idx index of the input block
1334 * @param bForce force the retrieval of an object, error messages
1335 * are suppressed if \em bForce is not set
1336 * @return pointer to TObject, caller must delete the object after use
1340 TObject* CreateInputObject(int idx, int bForce=0);
1344 * Get object from the input block list. The methods first checks whether the
1345 * object was already created. If not, it is created by @ref CreateInputObject
1346 * and inserted into the list of objects.
1347 * @param idx index in the input block list
1348 * @param classname name of the class, object is checked for correct class
1350 * @param bForce force the retrieval of an object, error messages
1351 * are suppressed if \em bForce is not set
1352 * @return pointer to TObject
1356 TObject* GetInputObject(int idx, const char* classname=NULL, int bForce=0);
1359 * Clean the list of input objects.
1360 * Cleanup is done at the end of each event processing.
1362 int CleanupInputObjects();
1365 * Insert a buffer into the output block stream.
1366 * This is the only method to insert blocks into the output stream, called
1367 * from all types of the Pushback method. The actual data might have been
1368 * written to the output buffer already. In that case NULL can be provided
1369 * as buffer, only the block descriptor will be build. If a header is specified,
1370 * it will be inserted before the buffer, default is no header.
1371 * @param pBuffer pointer to buffer
1372 * @param iBufferSize size of the buffer in byte
1373 * @param dt data type
1374 * @param spec data specification
1375 * @param pHeader pointer to header
1376 * @param iHeaderSize size of Header
1377 * @return neg. error code if failed
1379 int InsertOutputBlock(const void* pBuffer, int iBufferSize,
1380 const AliHLTComponentDataType& dt,
1381 AliHLTUInt32_t spec,
1382 const void* pHeader=NULL, int iHeaderSize=0);
1385 * Add a component statistics block to the output.
1386 * @return size of the added data
1388 int AddComponentStatistics(AliHLTComponentBlockDataList& blocks,
1389 AliHLTUInt8_t* buffer,
1390 AliHLTUInt32_t bufferSize,
1391 AliHLTUInt32_t offset,
1392 AliHLTComponentStatisticsList& stats) const;
1395 * Add a component table entry (descriptor) to the output
1396 * This is done at SOR/EOR. The component table is a list of chain ids
1397 * and 32bit ids calculated by a crc algorithm from the chian id. This
1398 * allows to tag data blocks with the id number rather than the string.
1400 * The kAliHLTDataTypeComponentTable data block currently has the string
1401 * as payload and the crc id as specification.
1402 * @return size of the added data
1404 int AddComponentTableEntry(AliHLTComponentBlockDataList& blocks,
1405 AliHLTUInt8_t* buffer,
1406 AliHLTUInt32_t bufferSize,
1407 AliHLTUInt32_t offset,
1408 const vector<AliHLTUInt32_t>& parents) const;
1410 /** The global component handler instance */
1411 static AliHLTComponentHandler* fgpComponentHandler; //! transient
1413 /** The environment where the component is running in */
1414 AliHLTAnalysisEnvironment fEnvironment; // see above
1416 /** Set by ProcessEvent before the processing starts */
1417 AliHLTEventID_t fCurrentEvent; // see above
1419 /** internal event no */
1420 int fEventCount; // see above
1422 /** the number of failed events */
1423 int fFailedEvents; // see above
1425 /** event data struct of the current event under processing */
1426 AliHLTComponentEventData fCurrentEventData; // see above
1428 /** array of input data blocks of the current event */
1429 const AliHLTComponentBlockData* fpInputBlocks; //! transient
1431 /** index of the current input block */
1432 int fCurrentInputBlock; // see above
1434 /** data type of the last block search */
1435 AliHLTComponentDataType fSearchDataType; // see above
1437 /** name of the class for the object to search for */
1438 string fClassName; // see above
1440 /** array of generated input objects */
1441 TObjArray* fpInputObjects; //! transient
1443 /** the output buffer */
1444 AliHLTUInt8_t* fpOutputBuffer; //! transient
1446 /** size of the output buffer */
1447 AliHLTUInt32_t fOutputBufferSize; // see above
1449 /** size of data written to output buffer */
1450 AliHLTUInt32_t fOutputBufferFilled; // see above
1452 /** list of ouput block data descriptors */
1453 AliHLTComponentBlockDataList fOutputBlocks; // see above
1455 /** stopwatch array */
1456 TObjArray* fpStopwatches; //! transient
1458 /** array of memory files AliHLTMemoryFile */
1459 AliHLTMemoryFilePList fMemFiles; //! transient
1461 /** descriptor of the current run */
1462 AliHLTRunDesc* fpRunDesc; //! transient
1464 /** the current DDL list */
1465 AliHLTEventDDL* fpDDLList; //! transient
1467 /** external fct to set CDB run no, indicates external CDB initialization */
1468 void (*fCDBSetRunNoFunc)(); //! transient
1470 /** id of the component in the analysis chain */
1471 string fChainId; //! transient
1473 /** crc value of the chainid, used as a 32bit id */
1474 AliHLTUInt32_t fChainIdCrc; //! transient
1476 /** optional benchmarking for the component statistics */
1477 TStopwatch* fpBenchmark; //! transient
1479 /** component requires steering data blocks */
1480 bool fRequireSteeringBlocks; //! transient
1482 /** current event type */
1483 AliHLTUInt32_t fEventType; //! transient
1485 /** component arguments */
1486 string fComponentArgs; //! transient
1489 /** event done data */
1490 AliHLTComponentEventDoneData* fEventDoneData; //! transient
1492 /** Reserved size of the memory stored at fEventDoneData */
1493 unsigned long fEventDoneDataSize; //! transient
1495 /** Comression level for ROOT objects */
1496 int fCompressionLevel; //! transient
1498 /** size of last PushBack-serialized object */
1499 int fLastObjectSize; //! transient
1501 ClassDef(AliHLTComponent, 10)