Minor cleanup of code.

[u/mrichter/AliRoot.git] / HLT / BASE / AliHLTDataSource.cxx

// $Id$

/**************************************************************************
 * This file is property of and copyright by the ALICE HLT Project        * 
 * ALICE Experiment at CERN, All rights reserved.                         *
 *                                                                        *
 * Primary Authors: Matthias Richter <Matthias.Richter@ift.uib.no>        *
 *                  for The ALICE HLT Project.                            *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/** @file   AliHLTDataSource.cxx
    @author Matthias Richter
    @date   
    @brief  Base class implementation for HLT data source components. */

#if __GNUC__>= 3
using namespace std;
#endif

#include "AliHLTDataSource.h"

/** ROOT macro for the implementation of ROOT specific class methods */
ClassImp(AliHLTDataSource)

AliHLTDataSource::AliHLTDataSource()
{ 
  // see header file for class documentation
  // or
  // refer to README to build package
  // or
  // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
}

void* AliHLTDataSource::fgpSpecialEvent=NULL;
int AliHLTDataSource::fgSpecialEventSize=0;
AliHLTComponentDataType AliHLTDataSource::fgSpecialEventDataType=kAliHLTVoidDataType;
AliHLTUInt32_t AliHLTDataSource::fgSpecialEventSpecification=kAliHLTVoidDataSpec;

AliHLTDataSource::~AliHLTDataSource()
{ 
  // see header file for class documentation
}

void AliHLTDataSource::GetInputDataTypes( vector<AliHLTComponentDataType>& list)
{
  // see header file for class documentation
  list.clear(); // there are no input data types
}


int AliHLTDataSource::DoProcessing( const AliHLTComponentEventData& evtData,
				    const AliHLTComponentBlockData* /*blocks*/, 
				    AliHLTComponentTriggerData& trigData,
				    AliHLTUInt8_t* outputPtr, 
				    AliHLTUInt32_t& size,
				    vector<AliHLTComponentBlockData>& outputBlocks,
				    AliHLTComponentEventDoneData*& edd )
{
  // see header file for class documentation
  int iResult=0;
  if (evtData.fBlockCnt > 0) {
    HLTWarning("Data source component skips input data blocks");
  }
  if (fgpSpecialEvent==NULL || fgSpecialEventSize==0) {
    // normal event publishing
    iResult=GetEvent(evtData, trigData, outputPtr, size, outputBlocks);
    HLTDebug("component %s (%p) GetEvent finished (%d)", GetComponentID(), this, iResult);
  } else {
    // publish special event
    if (size>=(unsigned)fgSpecialEventSize) {
      memcpy(outputPtr, fgpSpecialEvent, fgSpecialEventSize);
      AliHLTComponentBlockData bd;
      FillBlockData(bd);
      bd.fOffset=0;
      bd.fSize=fgSpecialEventSize;
      bd.fDataType=fgSpecialEventDataType;
      bd.fSpecification=fgSpecialEventSpecification;
      outputBlocks.push_back(bd);
      size=bd.fSize;
    } else {
      iResult=-ENOSPC;
    }
  }
  edd = NULL;
  return iResult;
}

int AliHLTDataSource::GetEvent( const AliHLTComponentEventData& evtData,
				AliHLTComponentTriggerData& trigData,
				AliHLTUInt8_t* /*outputPtr*/, 
				AliHLTUInt32_t& /*size*/,
				vector<AliHLTComponentBlockData>& /*outputBlocks*/ )
{
  // we just forward to the high level method, all other parameters already
  // have been stored internally
  return GetEvent(evtData, trigData);
}

int AliHLTDataSource::GetEvent( const AliHLTComponentEventData& /*evtData*/, AliHLTComponentTriggerData& /*trigData*/)
{
  HLTFatal("no processing method implemented");
  return -ENOSYS;
}

AliHLTDataSource::AliSpecialEventGuard::AliSpecialEventGuard(AliHLTRunDesc* pDesc, AliHLTComponentDataType dt, AliHLTUInt32_t spec)
{
  AliHLTDataSource::fgpSpecialEvent=pDesc; 
  AliHLTDataSource::fgSpecialEventSize=sizeof(AliHLTRunDesc); 
  AliHLTDataSource::fgSpecialEventDataType=dt; 
  AliHLTDataSource::fgSpecialEventSpecification=spec;
}

AliHLTDataSource::AliSpecialEventGuard::~AliSpecialEventGuard()
{
  AliHLTDataSource::fgpSpecialEvent=NULL; 
  AliHLTDataSource::fgSpecialEventSize=0; 
  AliHLTDataSource::fgSpecialEventDataType=kAliHLTVoidDataType;
  AliHLTDataSource::fgSpecialEventSpecification=kAliHLTVoidDataSpec;
}