Line data    Source code

       1              : /**
       2              :  * @file SourceModel.hpp FELIX CR's ELink concept wrapper
       3              :  *
       4              :  * This is part of the DUNE DAQ , copyright 2020.
       5              :  * Licensing/copyright details are in the COPYING file that you should have
       6              :  * received with this code.
       7              :  */
       8              : #ifndef ASIOLIBS_SRC_SOURCEMODEL_HPP_
       9              : #define ASIOLIBS_SRC_SOURCEMODEL_HPP_
      10              : 
      11              : #include "SourceConcept.hpp"
      12              : 
      13              : #include "iomanager/IOManager.hpp"
      14              : #include "iomanager/Sender.hpp"
      15              : #include "logging/Logging.hpp"
      16              : 
      17              : #include "asiolibs/opmon/SourceModel.pb.h"
      18              : 
      19              : // #include "datahandlinglibs/utils/ReusableThread.hpp"
      20              : #include "datahandlinglibs/DataMoveCallbackRegistry.hpp"
      21              : #include "datahandlinglibs/utils/BufferCopy.hpp"
      22              : 
      23              : // #include <folly/ProducerConsumerQueue.h>
      24              : // #include <nlohmann/json.hpp>
      25              : 
      26              : #include <atomic>
      27              : #include <memory>
      28              : #include <mutex>
      29              : #include <string>
      30              : #include <utility>
      31              : 
      32              : namespace dunedaq::asiolibs {
      33              : 
      34              : template<class TargetPayloadType>
      35              : class SourceModel : public SourceConcept
      36              : {
      37              : public:
      38              :   using sink_t = iomanager::SenderConcept<TargetPayloadType>;
      39              :   using inherited = SourceConcept;
      40              :   using data_t = nlohmann::json;
      41              : 
      42              :   /**
      43              :    * @brief SourceModel Constructor
      44              :    * @param name Instance name for this SourceModel instance
      45              :    */
      46            0 :   SourceModel()
      47            0 :     : SourceConcept()
      48              :   {
      49            0 :   }
      50            0 :   ~SourceModel() {}
      51              : 
      52            0 :   void acquire_callback() override
      53              :   {
      54            0 :     if (m_callback_is_acquired) {
      55            0 :       TLOG_DEBUG(5) << "SourceModel callback is already acquired!";
      56              :     } else {
      57              :       // Getting DataMoveCBRegistry
      58            0 :       auto dmcbr = datahandlinglibs::DataMoveCallbackRegistry::get();
      59            0 :       m_sink_callback = dmcbr->get_callback<TargetPayloadType>(inherited::m_sink_conf);
      60            0 :       m_callback_is_acquired = true;
      61            0 :     }
      62            0 :   }
      63              : 
      64              :   // Process an incoming raw byte buffer and extract complete frames of type TargetPayloadType.
      65            0 :   void handle_daq_frame(char* buffer) override
      66              :   {
      67              :     // Materialize a real TargetPayloadType object by copying bytes from the buffer.
      68              :     // This is defined behavior, alignment-safe, and fast, without pointer vodoo
      69              :     // Previously reinterpret_cast to TargetPayloadType* introduced alignment traps
      70              :     // “pretend there’s a constructed object there” UB.
      71              :     TargetPayloadType frame;
      72            0 :     std::memcpy(&frame, buffer, m_expected_frame_size);
      73              : 
      74              :     // Pass by value (moved); no references into 'buffer', so no UAF.
      75            0 :     (*m_sink_callback)(std::move(frame));
      76            0 :   }
      77              : 
      78            0 :   std::size_t get_expected_frame_size() const override { return m_expected_frame_size; }
      79              : 
      80            0 :   void generate_opmon_data() override
      81              :   {
      82              : 
      83            0 :     opmon::SourceInfo info;
      84            0 :     info.set_leftover_bytes_encountered(m_leftover_bytes_encountered.exchange(0));
      85              : 
      86            0 :     publish(std::move(info));
      87            0 :   }
      88              : 
      89              : private:
      90              :   // Constants
      91              :   const std::size_t m_expected_frame_size = sizeof(TargetPayloadType);
      92              : 
      93              :   // Callback internals
      94              :   bool m_callback_is_acquired{ false };
      95              :   using sink_cb_t = std::shared_ptr<std::function<void(TargetPayloadType&&)>>;
      96              :   sink_cb_t m_sink_callback;
      97              : 
      98              :   // Stats
      99              :   std::atomic<uint64_t> m_leftover_bytes_encountered{ 0 }; // NOLINT(build/unsigned)
     100              : };
     101              : 
     102              : } // namespace dunedaq::asiolibs
     103              : 
     104              : #endif // ASIOLIBS_SRC_SOURCEMODEL_HPP_