//-*- Mode: C++ -*- // @(#) $Id$ #ifndef ALIHLTCOMPONENT_H #define ALIHLTCOMPONENT_H /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * See cxx source for full Copyright notice */ /** @file AliHLTComponent.h @author Matthias Richter, Timm Steinbeck @date @brief Base class declaration for HLT components. @note The class is both used in Online (PubSub) and Offline (AliRoot) context */ /** * @defgroup alihlt_component Component handling of the HLT module * This section describes the the component handling for the HLT module. */ #include #include #include "AliHLTLogging.h" #include "AliHLTDataTypes.h" #include "AliHLTDefinitions.h" /* Matthias Dec 2006 * The names have been changed for Aliroot's coding conventions sake * The old names are defined for backward compatibility with the * stand alone SampleLib package */ typedef AliHLTComponentLogSeverity AliHLTComponent_LogSeverity; typedef AliHLTComponentEventData AliHLTComponent_EventData; typedef AliHLTComponentShmData AliHLTComponent_ShmData; typedef AliHLTComponentDataType AliHLTComponent_DataType; typedef AliHLTComponentBlockData AliHLTComponent_BlockData; typedef AliHLTComponentTriggerData AliHLTComponent_TriggerData; typedef AliHLTComponentEventDoneData AliHLTComponent_EventDoneData; class AliHLTComponentHandler; class TObjArray; class TStopwatch; /** * @class AliHLTComponent * Base class of HLT data processing components. * The class provides a common interface for HLT data processing components. * The interface can be accessed from the online HLT framework or the AliRoot * offline analysis framework. * @section alihltcomponent-properties Component identification and properties * Each component must provide a unique ID, input and output data type indications, * and a spawn function. * @subsection alihltcomponent-req-methods Required property methods * - @ref GetComponentID * - @ref GetInputDataTypes (see @ref alihltcomponent-type for default * implementations.) * - @ref GetOutputDataType (see @ref alihltcomponent-type for default * implementations.) * - @ref GetOutputDataSize (see @ref alihltcomponent-type for default * implementations.) * - @ref Spawn * * @subsection alihltcomponent-opt-mehods Optional handlers * - @ref DoInit * - @ref DoDeinit * * @subsection alihltcomponent-processing-mehods Data processing * * * @subsection alihltcomponent-type Component type * Components can be of type * - @ref kSource components which only produce data * - @ref kProcessor components which consume and produce data * - @ref kSink components which only consume data * * where data production and consumption refer to the analysis data stream. In * order to indicate the type, a child component can overload the * @ref GetComponentType function. * @subsubsection alihltcomponent-type-std Standard implementations * Components in general do not need to implement this function, standard * implementations of the 3 types are available: * - AliHLTDataSource for components of type @ref kSource
* All types of data sources can inherit from AliHLTDataSource and must * implement the @ref AliHLTDataSource::GetEvent method. The class * also implements a standard method for @ref GetInputDataTypes. * * - AliHLTProcessor for components of type @ref kProcessor
* All types of data processors can inherit from AliHLTDataSource and must * implement the @ref AliHLTProcessor::DoEvent method. * * - AliHLTDataSink for components of type @ref kSink
* All types of data processors can inherit from AliHLTDataSource and must * implement the @ref AliHLTDataSink::DumpEvent method. The class * also implements a standard method for @ref GetOutputDataType and @ref * GetOutputDataSize. * * @subsection alihltcomponent-environment Running environment * * In order to adapt to different environments (on-line/off-line), the component * gets an environment structure with function pointers. The base class provides * member functions for those environment dependend functions. The member * functions are used by the component implementation and are re-mapped to the * corresponding functions. * @section alihltcomponent-interfaces Component interfaces * Each of the 3 standard component base classes AliHLTProcessor, AliHLTDataSource * and AliHLTDataSink provides it's own processing method (see * @ref alihltcomponent-type-std), which splits into a high and a low-level * method. For the @ref alihltcomponent-low-level-interface, all parameters are * shipped as function arguments, the component is supposed to dump data to the * output buffer and handle all block descriptors. * The @ref alihltcomponent-high-level-interface is the standard processing * method and will be used whenever the low-level method is not overloaded. * * @subsection alihltcomponent-high-level-interface High-level interface * The high-level component interface provides functionality to exchange ROOT * structures between components. In contrast to the * @ref alihltcomponent-low-level-interface, a couple of functions can be used * to access data blocks of the input stream * and send data blocks or ROOT TObject's to the output stream. The functionality * is hidden from the user and is implemented by using ROOT's TMessage class. * * @subsubsection alihltcomponent-high-level-int-methods Interface methods * The interface provides a couple of methods in order to get objects from the * input, data blocks (non TObject) from the input, and to push back objects and * data blocks to the output. For convenience there are several functions of * identical name (and similar behavior) with different parameters defined. * Please refer to the function documentation. * - @ref GetNumberOfInputBlocks
* return the number of data blocks in the input stream * - @ref GetFirstInputObject
* get the first object of a specific data type * - @ref GetNextInputObject
* get the next object of same data type as last GetFirstInputObject/Block call * - @ref GetFirstInputBlock
* get the first block of a specific data type * - @ref GetNextInputBlock
* get the next block of same data type as last GetFirstInputBlock/Block call * - @ref PushBack
* insert an object or data buffer into the output * - @ref CreateEventDoneData
* add event information to the output * * In addition, the processing methods are simplified a bit by cutting out most of * the parameters. The component implementation * @see AliHLTProcessor AliHLTDataSource AliHLTDataSink * * \em IMPORTANT: objects and block descriptors provided by the high-level interface * MUST NOT BE DELETED by the caller. * * @subsubsection alihltcomponent-high-level-int-guidelines High-level interface guidelines * - Structures must inherit from the ROOT object base class TObject in order be * transported by the transportation framework. * - all pointer members must be transient (marked //! behind the member * definition), i.e. will not be stored/transported, or properly marked * (//->) in order to call the streamer of the object the member is pointing * to. The latter is not recomended. Structures to be transported between components * should be streamlined. * - no use of stl vectors/strings, use appropriate ROOT classes instead * * @subsection alihltcomponent-low-level-interface Low-level interface * The low-level component interface consists of the specific data processing * methods for @ref AliHLTProcessor, @ref AliHLTDataSource, and @ref AliHLTDataSink. * - @ref AliHLTProcessor::DoEvent * - @ref AliHLTDataSource::GetEvent * - @ref AliHLTDataSink::DumpEvent * * * @section alihltcomponent-handling Component handling * The handling of HLT analysis components is carried out by the AliHLTComponentHandler. * Component are registered automatically at load-time of the component shared library * under the following suppositions: * - the component library has to be loaded from the AliHLTComponentHandler using the * @ref AliHLTComponentHandler::LoadLibrary method. * - the component implementation defines one global object (which is generated * when the library is loaded) * * @subsection alihltcomponent-design-rules General design considerations * The analysis code should be implemented in one or more destict class(es). A * \em component should be implemented which interface the destict analysis code to the * component interface. This component generates the analysis object dynamically.
* * Assume you have an implemetation AliHLTDetMyAnalysis , another class * AliHLTDetMyAnalysisComponent contains: * 
 * private:
 *   AliHLTDetMyAnalysis* fMyAnalysis;  //!
 *
* The object should then be instantiated in the DoInit handler of * AliHLTDetMyAnalysisComponent , and cleaned in the DoDeinit handler. * * Further rules: * - avoid big static arrays in the component, allocate the memory at runtime * * @ingroup alihlt_component * @section alihltcomponent-members Class members */ class AliHLTComponent : public AliHLTLogging { public: /** standard constructor */ AliHLTComponent(); /** not a valid copy constructor, defined according to effective C++ style */ AliHLTComponent(const AliHLTComponent&); /** not a valid assignment op, but defined according to effective C++ style */ AliHLTComponent& operator=(const AliHLTComponent&); /** standard destructor */ virtual ~AliHLTComponent(); /** component type definitions */ enum TComponentType { kUnknown=0, kSource=1, kProcessor=2, kSink=3 }; /** * Init function to prepare data processing. * Initialization of common data structures for a sequence of events. * The call is redirected to the internal method @ref DoInit which can be * overridden by the child class.
* During Init also the environment structure is passed to the component. * @param environ environment pointer with environment dependend function * calls * @param environParam additionel parameter for function calls, the pointer * is passed as it is * @param argc size of the argument array * @param argv agument array for component initialization */ virtual int Init( AliHLTComponentEnvironment* environ, void* environParam, int argc, const char** argv ); /** * Clean-up function to terminate data processing. * Clean-up of common data structures after data processing. * The call is redirected to the internal method @ref DoDeinit which can be * overridden by the child class. */ virtual int Deinit(); /** * Processing of one event. * The method is the entrance of the event processing. The parameters are * cached for uses with the high-level interface and the DoProcessing * implementation is called. * * @param evtData * @param blocks * @param trigData * @param outputPtr * @param size * @param outputBlockCnt out: size of the output block array, set by the component * @param outputBlocks out: the output block array is allocated internally * @param edd * @return neg. error code if failed */ int ProcessEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks, AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr, AliHLTUInt32_t& size, AliHLTUInt32_t& outputBlockCnt, AliHLTComponentBlockData*& outputBlocks, AliHLTComponentEventDoneData*& edd ); /** * Internal processing of one event. * The method is pure virtual and implemented by the child classes * - @ref AliHLTProcessor * - @ref AliHLTDataSource * - @ref AliHLTDataSink * * @param evtData * @param blocks * @param trigData * @param outputPtr * @param size * @param outputBlocks out: the output block array is allocated internally * @param edd * @return neg. error code if failed */ virtual int DoProcessing( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks, AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr, AliHLTUInt32_t& size, vector& outputBlocks, AliHLTComponentEventDoneData*& edd ) = 0; // Information member functions for registration. /** * Get the type of the component. * The function is pure virtual and must be implemented by the child class. * @return component type id */ virtual TComponentType GetComponentType() = 0; // Source, sink, or processor /** * Get the id of the component. * Each component is identified by a unique id. * The function is pure virtual and must be implemented by the child class. * @return component id (string) */ virtual const char* GetComponentID() = 0; /** * Get the input data types of the component. * The function is pure virtual and must be implemented by the child class. * @return list of data types in the vector reference */ virtual void GetInputDataTypes( vector& ) = 0; /** * Get the output data type of the component. * The function is pure virtual and must be implemented by the child class. * @return output data type */ virtual AliHLTComponentDataType GetOutputDataType() = 0; /** * Get a ratio by how much the data volume is shrinked or enhanced. * The function is pure virtual and must be implemented by the child class. * @param constBase return: additive part, independent of the * input data volume * @param inputMultiplier return: multiplication ratio * @return values in the reference variables */ virtual void GetOutputDataSize( unsigned long& constBase, double& inputMultiplier ) = 0; /** * Spawn function. * Each component must implement a spawn function to create a new instance of * the class. Basically the function must return new my_class_name. * @return new class instance */ virtual AliHLTComponent* Spawn() = 0; /** * Find matching data types between this component and a consumer component. * Currently, a component can produce only one type of data. This restriction is most * likely to be abolished in the future. * @param pConsumer a component and consumer of the data produced by this component * @param tgtList reference to a vector list to receive the matching data types. * @return >= 0 success, neg. error code if failed */ int FindMatchingDataTypes(AliHLTComponent* pConsumer, vector* tgtList); /** * Set the global component handler. * The static method is needed for the automatic registration of components. */ static int SetGlobalComponentHandler(AliHLTComponentHandler* pCH, int bOverwrite=0); /** * Clear the global component handler. * The static method is needed for the automatic registration of components. */ static int UnsetGlobalComponentHandler(); /** * Helper function to convert the data type to a string. */ static string DataType2Text( const AliHLTComponentDataType& type ); /** * Helper function to print content of data type. */ void PrintDataTypeContent(AliHLTComponentDataType& dt, const char* format=NULL) const; /** * helper function to initialize AliHLTComponentEventData structure */ static void FillEventData(AliHLTComponentEventData& evtData); /** * Print info on an AliHLTComponentDataType structure * This is just a helper function to examine an @ref AliHLTComponentDataType * structur. */ void PrintComponentDataTypeInfo(const AliHLTComponentDataType& dt); /** * Stopwatch type for benchmarking. */ enum AliHLTStopwatchType { /** total time for event processing */ kSWBase, /** detector algorithm w/o interface callbacks */ kSWDA, /** data sources */ kSWInput, /** data sinks */ kSWOutput, /** number of types */ kSWTypeCount }; /** * Helper class for starting and stopping a stopwatch. * The guard can be used by instantiating an object in a function. The * specified stopwatch is started and the previous stopwatch put on * hold. When the function is terminated, the object is deleted automatically * deleted, stopping the stopwatch and starting the one on hold.
* \em IMPORTANT: never create dynamic objects from this guard as this violates * the idea of a guard. */ class AliHLTStopwatchGuard { public: /** standard constructor (not for use) */ AliHLTStopwatchGuard(); /** constructor */ AliHLTStopwatchGuard(TStopwatch* pStart); /** copy constructor (not for use) */ AliHLTStopwatchGuard(AliHLTStopwatchGuard&); /** destructor */ ~AliHLTStopwatchGuard(); private: /** * Hold the previous guard for the existence of this guard. * Checks whether this guard controls a new stopwatch. In that case, the * previous guard and its stopwatch are put on hold. * @param pSucc instance of the stopwatch of the new guard * @return 1 if pSucc is a different stopwatch which should * be started
* 0 if it controls the same stopwatch */ int Hold(TStopwatch* pSucc); /** * Resume the previous guard. * Checks whether the peceeding guard controls a different stopwatch. In that * case, the its stopwatch is resumed. * @param pSucc instance of the stopwatch of the new guard * @return 1 if pSucc is a different stopwatch which should * be stopped
* 0 if it controls the same stopwatch */ int Resume(TStopwatch* pSucc); /** the stopwatch controlled by this guard */ TStopwatch* fpStopwatch; //!transient /** previous stopwatch guard, put on hold during existence of the guard */ AliHLTStopwatchGuard* fpPrec; //!transient /** active stopwatch guard */ static AliHLTStopwatchGuard* fgpCurrent; //!transient }; /** * Set a stopwatch for a given purpose. * @param pSW stopwatch object * @param type type of the stopwatch */ int SetStopwatch(TObject* pSW, AliHLTStopwatchType type=kSWBase); /** * Init a set of stopwatches. * @param pStopwatches object array of stopwatches */ int SetStopwatches(TObjArray* pStopwatches); protected: /** * Fill AliHLTComponentBlockData structure with default values. * @param blockData reference to data structure */ void FillBlockData( AliHLTComponentBlockData& blockData ) const; /** * Fill AliHLTComponentShmData structure with default values. * @param shmData reference to data structure */ void FillShmData( AliHLTComponentShmData& shmData ) const; /** * Fill AliHLTComponentDataType structure with default values. * @param dataType reference to data structure */ void FillDataType( AliHLTComponentDataType& dataType ) const; /** * Copy data type structure * Copies the value an AliHLTComponentDataType structure to another one * @param[out] tgtdt target structure * @param[in] srcdt source structure */ void CopyDataType(AliHLTComponentDataType& tgtdt, const AliHLTComponentDataType& srcdt); /** * Set the ID and Origin of an AliHLTComponentDataType structure. * The function sets the fStructureSize member and copies the strings * to the ID and Origin. Only characters from the valid part of the string * are copied, the rest is fille with 0's. * Please note that the fID and fOrigin members are not strings, just arrays of * chars of size @ref kAliHLTComponentDataTypefIDsize and * @ref kAliHLTComponentDataTypefOriginSize respectively and not necessarily with * a terminating zero. * @param tgtdt target data type structure * @param id ID string * @param origin Origin string */ void SetDataType(AliHLTComponentDataType& tgtdt, const char* id, const char* origin); /** * Default method for the internal initialization. * The method is called by @ref Init */ virtual int DoInit( int argc, const char** argv ); /** * Default method for the internal clean-up. * The method is called by @ref Deinit */ virtual int DoDeinit(); /** * General memory allocation method. * All memory which is going to be used 'outside' of the interface must * be provided by the framework (online or offline). * The method is redirected to a function provided by the current * framework. Function pointers are transferred via the @ref * AliHLTComponentEnvironment structure. */ void* AllocMemory( unsigned long size ); /** * Helper function to create a monolithic BlockData description block out * of a list BlockData descriptors. * For convenience, inside the interface vector lists are used, to make the * interface pure C style, monilithic blocks must be exchanged. * The method is redirected to a function provided by the current * framework. Function pointers are transferred via the @ref * AliHLTComponentEnvironment structure. */ int MakeOutputDataBlockList( const vector& blocks, AliHLTUInt32_t* blockCount, AliHLTComponentBlockData** outputBlocks ); /** * Fill the EventDoneData structure. * The method is redirected to a function provided by the current * framework. Function pointers are transferred via the @ref * AliHLTComponentEnvironment structure. */ int GetEventDoneData( unsigned long size, AliHLTComponentEventDoneData** edd ); /** * Helper function to convert the data type to a string. */ void DataType2Text(const AliHLTComponentDataType& type, char output[kAliHLTComponentDataTypefIDsize+kAliHLTComponentDataTypefOriginSize+2]) const; /** * Get event number. * @return value of the internal event counter */ int GetEventCount() const; /** * Get the number of input blocks. * @return number of input blocks */ int GetNumberOfInputBlocks(); /** * Get the first object of a specific data type from the input data. * The hight-level methods provide functionality to transfer ROOT data * structures which inherit from TObject. * The method looks for the first ROOT object of type dt in the input stream. * If also the class name is provided, the object is checked for the right * class type. The input data block needs a certain structure, namely the * buffer size as first word. If the cross check fails, the retrieval is * silently abondoned, unless the \em bForce parameter is set.
* \em Note: THE OBJECT MUST NOT BE DELETED by the caller. * @param dt data type of the object * @param classname class name of the object * @param bForce force the retrieval of an object, error messages * are suppressed if \em bForce is not set * @return pointer to @ref TObject, NULL if no objects of specified type * available */ const TObject* GetFirstInputObject(const AliHLTComponentDataType& dt=kAliHLTAnyDataType, const char* classname=NULL, int bForce=0); /** * Get the first object of a specific data type from the input data. * The hight-level methods provide functionality to transfer ROOT data * structures which inherit from TObject. * The method looks for the first ROOT object of type specified by the ID and * Origin strings in the input stream. * If also the class name is provided, the object is checked for the right * class type. The input data block needs a certain structure, namely the * buffer size as first word. If the cross check fails, the retrieval is * silently abondoned, unless the \em bForce parameter is set.
* \em Note: THE OBJECT MUST NOT BE DELETED by the caller. * @param dtID data type ID of the object * @param dtOrigin data type origin of the object * @param classname class name of the object * @param bForce force the retrieval of an object, error messages * are suppressed if \em bForce is not set * @return pointer to @ref TObject, NULL if no objects of specified type * available */ const TObject* GetFirstInputObject(const char* dtID, const char* dtOrigin, const char* classname=NULL, int bForce=0); /** * Get the next object of a specific data type from the input data. * The hight-level methods provide functionality to transfer ROOT data * structures which inherit from TObject. * The method looks for the next ROOT object of type and class specified * to the previous @ref GetFirstInputObject call.
* \em Note: THE OBJECT MUST NOT BE DELETED by the caller. * @param bForce force the retrieval of an object, error messages * are suppressed if \em bForce is not set * @return pointer to @ref TObject, NULL if no more objects available */ const TObject* GetNextInputObject(int bForce=0); /** * Get data type of an input block. * Get data type of the object previously fetched via * GetFirstInputObject/NextInputObject or the last one if no object * specified. * @param pObject pointer to TObject * @return data specification, kAliHLTVoidDataSpec if failed */ AliHLTComponentDataType GetDataType(const TObject* pObject=NULL); /** * Get data specification of an input block. * Get data specification of the object previously fetched via * GetFirstInputObject/NextInputObject or the last one if no object * specified. * @param pObject pointer to TObject * @return data specification, kAliHLTVoidDataSpec if failed */ AliHLTUInt32_t GetSpecification(const TObject* pObject=NULL); /** * Get the first block of a specific data type from the input data. * The method looks for the first block of type dt in the input stream. It is intended * to be used within the high-level interface.
* \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller. * @param dt data type of the block * @return pointer to @ref AliHLTComponentBlockData */ const AliHLTComponentBlockData* GetFirstInputBlock(const AliHLTComponentDataType& dt=kAliHLTAnyDataType); /** * Get the first block of a specific data type from the input data. * The method looks for the first block of type specified by the ID and * Origin strings in the input stream. It is intended * to be used within the high-level interface.
* \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller. * @param dtID data type ID of the block * @param dtOrigin data type origin of the block * @return pointer to @ref AliHLTComponentBlockData */ const AliHLTComponentBlockData* GetFirstInputBlock(const char* dtID, const char* dtOrigin); /** * Get input block by index.
* \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller. * @return pointer to AliHLTComponentBlockData, NULL if index out of range */ const AliHLTComponentBlockData* GetInputBlock(int index); /** * Get the next block of a specific data type from the input data. * The method looks for the next block of type and class specified * to the previous @ref GetFirstInputBlock call. * To be used within the high-level interface.
* \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller. */ const AliHLTComponentBlockData* GetNextInputBlock(); /** * Get data specification of an input block. * Get data specification of the input bblock previously fetched via * GetFirstInputObject/NextInputObject or the last one if no block * specified. * @param pBlock pointer to input block * @return data specification, kAliHLTVoidDataSpec if failed */ AliHLTUInt32_t GetSpecification(const AliHLTComponentBlockData* pBlock=NULL); /** * Insert an object into the output. * @param pObject pointer to root object * @param dt data type of the object * @param spec data specification * @return neg. error code if failed */ int PushBack(TObject* pObject, const AliHLTComponentDataType& dt, AliHLTUInt32_t spec=kAliHLTVoidDataSpec); /** * Insert an object into the output. * @param pObject pointer to root object * @param dtID data type ID of the object * @param dtOrigin data type origin of the object * @param spec data specification * @return neg. error code if failed */ int PushBack(TObject* pObject, const char* dtID, const char* dtOrigin, AliHLTUInt32_t spec=kAliHLTVoidDataSpec); /** * Insert an object into the output. * @param pBuffer pointer to buffer * @param iSize size of the buffer * @param dt data type of the object * @param spec data specification * @return neg. error code if failed */ int PushBack(void* pBuffer, int iSize, const AliHLTComponentDataType& dt, AliHLTUInt32_t spec=kAliHLTVoidDataSpec); /** * Insert an object into the output. * @param pBuffer pointer to buffer * @param iSize size of the buffer * @param dtID data type ID of the object * @param dtOrigin data type origin of the object * @param spec data specification * @return neg. error code if failed */ int PushBack(void* pBuffer, int iSize, const char* dtID, const char* dtOrigin, AliHLTUInt32_t spec=kAliHLTVoidDataSpec); /** * Estimate size of a TObject * @param pObject * @return buffer size in byte */ int EstimateObjectSize(TObject* pObject) const; /** * Insert event-done data information into the output. * @param edd event-done data information */ int CreateEventDoneData(AliHLTComponentEventDoneData edd); private: /** * Increment the internal event counter. * To be used by the friend classes AliHLTProcessor, AliHLTDataSource * and AliHLTDataSink. * @return new value of the internal event counter * @internal */ int IncrementEventCounter(); /** * Find the first input block of specified data type beginning at index. * @param dt data type * @param startIdx index to start the search * @return index of the block, -ENOENT if no block found * * @internal */ int FindInputBlock(const AliHLTComponentDataType& dt, int startIdx=-1); /** * Get index in the array of input bocks. * Calculate index and check integrety of a block data structure pointer. * @param pBlock pointer to block data * @return index of the block, -ENOENT if no block found * * @internal */ int FindInputBlock(const AliHLTComponentBlockData* pBlock); /** * Create an object from a specified input block. * @param idx index of the input block * @param bForce force the retrieval of an object, error messages * are suppressed if \em bForce is not set * @return pointer to TObject, caller must delete the object after use * * @internal */ TObject* CreateInputObject(int idx, int bForce=0); /** * Get input object * Get object from the input block list. The methods first checks whether the * object was already created. If not, it is created by @ref CreateInputObject * and inserted into the list of objects. * @param idx index in the input block list * @param classname name of the class, object is checked for correct class * name if set * @param bForce force the retrieval of an object, error messages * are suppressed if \em bForce is not set * @return pointer to TObject * * @internal */ TObject* GetInputObject(int idx, const char* classname=NULL, int bForce=0); /** * Clean the list of input objects. * Cleanup is done at the end of each event processing. */ int CleanupInputObjects(); /** * Insert a buffer into the output block stream. * This is the only method to insert blocks into the output stream, called * from all types of the Pushback method. The actual data might have been * written to the output buffer already. In that case NULL can be provided * as buffer, only the block descriptor will be build. * @param pBuffer pointer to buffer * @param iSize size of the buffer in byte * @param dt data type * @param spec data specification */ int InsertOutputBlock(void* pBuffer, int iSize, const AliHLTComponentDataType& dt, AliHLTUInt32_t spec); /** The global component handler instance */ static AliHLTComponentHandler* fgpComponentHandler; //! transient /** The environment where the component is running in */ AliHLTComponentEnvironment fEnvironment; // see above /** Set by ProcessEvent before the processing starts */ AliHLTEventID_t fCurrentEvent; // see above /** internal event no */ int fEventCount; // see above /** the number of failed events */ int fFailedEvents; // see above /** event data struct of the current event under processing */ AliHLTComponentEventData fCurrentEventData; // see above /** array of input data blocks of the current event */ const AliHLTComponentBlockData* fpInputBlocks; //! transient /** index of the current input block */ int fCurrentInputBlock; // see above /** data type of the last block search */ AliHLTComponentDataType fSearchDataType; // see above /** name of the class for the object to search for */ string fClassName; // see above /** array of generated input objects */ TObjArray* fpInputObjects; //! transient /** the output buffer */ AliHLTUInt8_t* fpOutputBuffer; //! transient /** size of the output buffer */ AliHLTUInt32_t fOutputBufferSize; // see above /** size of data written to output buffer */ AliHLTUInt32_t fOutputBufferFilled; // see above /** list of ouput block data descriptors */ vector fOutputBlocks; // see above /** stopwatch array */ TObjArray* fpStopwatches; //! transient ClassDef(AliHLTComponent, 2) }; #endif