TimeSync.hpp

Go to the documentation of this file.

 
#ifndef DFMESSAGES_INCLUDE_DFMESSAGES_TIMESYNC_HPP_
#define DFMESSAGES_INCLUDE_DFMESSAGES_TIMESYNC_HPP_
 
#include "dfmessages/Types.hpp"
 
#include "serialization/Serialization.hpp"
 
#include <cstddef>
#include <limits>
 
namespace dunedaq {
namespace dfmessages {
struct TimeSync
{
  timestamp_t daq_time{ TypeDefaults::s_invalid_timestamp };
  system_time_t system_time{ TypeDefaults::s_invalid_system_time };
  uint64_t sequence_number{ 0 }; // NOLINT(build/unsigned)
  run_number_t run_number{ 0 };
  uint32_t source_id{ 0 }; // NOLINT(build/unsigned)
 
  TimeSync() = default;

  explicit TimeSync(timestamp_t daq_time, system_time_t sys_time = gettimeofday_us())
    : daq_time(daq_time)
    , system_time(sys_time)
  {}

  static system_time_t gettimeofday_us()
  {
    struct timeval tv;
    gettimeofday(&tv, nullptr);
    return static_cast<system_time_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
  }
 
  DUNE_DAQ_SERIALIZE(TimeSync, daq_time, system_time, run_number, sequence_number, source_id);
};
static_assert(sizeof(TimeSync) == 32, "TimeSync size unexpected!");
static_assert(offsetof(TimeSync, daq_time) == 0, "TimeSync daq_time field not at expected offset!");
static_assert(offsetof(TimeSync, system_time) == 8, "TimeSync system_time field not at expected offset!");
static_assert(offsetof(TimeSync, sequence_number) == 16, "TimeSync sequence_number field not at expected offset!");
static_assert(offsetof(TimeSync, run_number) == 24, "TimeSync run_number field not at expected offset!");
static_assert(offsetof(TimeSync, source_id) == 28, "TimeSync source_id field not at expected offset!");
} // namespace dfmessages
DUNE_DAQ_SERIALIZABLE(dfmessages::TimeSync, "TimeSync");
} // namespace dunedaq
 
#endif // DFMESSAGES_INCLUDE_DFMESSAGES_TIMESYNC_HPP_