MsgHeader.h

Go to the documentation of this file.

#ifndef IOPool_Streamer_MsgHeader_h
#define IOPool_Streamer_MsgHeader_h

#include "IOPool/Streamer/interface/MsgTools.h"
// as it is in memory of file
namespace edm::streamer {
  struct Header {
    Header(uint32 code, uint32 size) : code_(code) { convert(size, size_); }

    uint8 code_;        // type of the message
    char_uint32 size_;  // of entire message including all headers

    // 20-Jul-2006, KAB: added enumeration for message types
    enum Codes {
      INVALID = 0,
      INIT = 1,
      EVENT = 2,
      DONE = 3,  // EOFRECORD = 4 is no longer used
      HEADER_REQUEST = 5,
      EVENT_REQUEST = 6,
      CONS_REG_REQUEST = 7,
      CONS_REG_RESPONSE = 8,
      DQM_INIT = 9,
      DQM_EVENT = 10,
      DQMEVENT_REQUEST = 11,
      INIT_SET = 12,
      NEW_INIT_AVAILABLE = 13,
      ERROR_EVENT = 14,
      FILE_CLOSE_REQUEST = 15,
      SPARE1 = 16,
      SPARE2 = 17,
      PADDING = 255  //reserved for padding
    };
  };

  // as we need to see it
  class HeaderView {
  public:
    HeaderView(void* buf) {
      Header* h = (Header*)buf;
      code_ = h->code_;
      size_ = convert32(h->size_);
    }

    uint32 code() const { return code_; }
    uint32 size() const { return size_; }

  private:
    uint32 code_;
    uint32 size_;
  };
}  // namespace edm::streamer
#endif