2 * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * SPDX-License-Identifier: GPL-2.0-only
8 #ifndef LTTNG_STREAM_CLASS_H
9 #define LTTNG_STREAM_CLASS_H
13 #include <vendor/optional.hpp>
21 class trace_class_visitor;
25 enum class header_type { COMPACT, LARGE };
28 * Derived classes must implement _accept_on_event_classes()
29 * to continue the traversal to the stream class' event classes.
31 void accept(trace_class_visitor& visitor) const;
32 virtual ~stream_class() = default;
34 virtual const type* get_packet_context() const;
35 virtual const type* get_event_header() const;
36 virtual const type* get_event_context() const;
38 const unsigned int id;
40 * header_type is suffixed with '_' to work-around a bug in older
41 * GCCs (before 6) that do not recognize hidden/shadowed enumeration as valid
42 * nested-name-specifiers.
44 const header_type header_type_;
45 const nonstd::optional<std::string> default_clock_class_name;
48 stream_class(unsigned int id,
49 enum header_type header_type,
50 nonstd::optional<std::string> default_clock_class_name = nonstd::nullopt);
51 virtual void _accept_on_event_classes(trace_class_visitor& trace_class_visitor) const = 0;
53 lttng::sessiond::trace::type::cuptr _packet_context;
54 lttng::sessiond::trace::type::cuptr _event_header;
55 lttng::sessiond::trace::type::cuptr _event_context;
58 } /* namespace trace */
59 } /* namespace sessiond */
60 } /* namespace lttng */
62 #endif /* LTTNG_STREAM_CLASS_H */