TPCSectorHeader.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#ifndef O2_TPCSECTORHEADER_H
#define O2_TPCSECTORHEADER_H
 
#include "Headers/DataHeader.h"
#include "DataFormatsTPC/Constants.h"
 
namespace o2
{
namespace tpc
{
 
struct TPCSectorHeader : public o2::header::BaseHeader {
  // Required to do the lookup
  constexpr static const o2::header::HeaderType sHeaderType = "TPCSectH";
  static const uint32_t sVersion = 2;
  static constexpr int NSectors = o2::tpc::constants::MAXSECTOR;
 
  TPCSectorHeader(int s)
    : BaseHeader(sizeof(TPCSectorHeader), sHeaderType, o2::header::gSerializationMethodNone, sVersion), sectorBits(((uint64_t)0x1) << s)
  {
  }
 
  int sector() const
  {
    for (int s = 0; s < NSectors; s++) {
      if ((sectorBits >> s) == 0x1) {
        return s;
      }
    }
    if (sectorBits != 0) {
      return NSectors;
    }
    return -1;
  }
 
  uint64_t sectorBits;
  union {
    uint64_t activeSectorsFlags = 0;
    struct {
      uint64_t activeSectors : NSectors;
      uint64_t unused : 12;
      uint64_t flags : 16;
    };
  };
};
} // namespace tpc
} // namespace o2
 
#endif // O2_TPCSECTORHEADER_H