src/bin/lttng-sessiond/stream-class.hpp

   1 /*
   2  * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_STREAM_CLASS_H
   9 #define LTTNG_STREAM_CLASS_H
  10
  11 #include "field.hpp"
  12
  13 #include <vector>
  14
  15 namespace lttng {
  16 namespace sessiond {
  17 namespace trace {
  18
  19 class trace_class_visitor;
  20
  21 class stream_class {
  22 public:
  23         enum class header_type { COMPACT, LARGE };
  24
  25         /*
  26          * Derived classes must implement _accept_on_event_classes()
  27          * to continue the traversal to the stream class' event classes.
  28          */
  29         void accept(trace_class_visitor& visitor) const;
  30         virtual ~stream_class() = default;
  31
  32         virtual const lttng::sessiond::trace::type& get_context() const;
  33
  34         const unsigned int id;
  35         const header_type header_type;
  36
  37 protected:
  38         stream_class(unsigned int id, enum header_type header_type);
  39         virtual void _accept_on_event_classes(trace_class_visitor& trace_class_visitor) const = 0;
  40
  41         lttng::sessiond::trace::type::cuptr _context;
  42 };
  43
  44 } /* namespace trace */
  45 } /* namespace sessiond */
  46 } /* namespace lttng */
  47
  48 #endif /* LTTNG_STREAM_CLASS_H */