| 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_TSDL_TRACE_CLASS_VISITOR_H |
| 9 | #define LTTNG_TSDL_TRACE_CLASS_VISITOR_H |
| 10 | |
| 11 | #include "trace-class.hpp" |
| 12 | #include "stream-class.hpp" |
| 13 | #include "event-class.hpp" |
| 14 | |
| 15 | #include <vendor/optional.hpp> |
| 16 | |
| 17 | #include <functional> |
| 18 | |
| 19 | namespace lttng { |
| 20 | namespace sessiond { |
| 21 | namespace tsdl { |
| 22 | |
| 23 | using append_metadata_fragment_function = std::function<void(const std::string& fragment)>; |
| 24 | |
| 25 | class trace_class_visitor : public lttng::sessiond::trace::trace_class_visitor { |
| 26 | public: |
| 27 | trace_class_visitor(const lttng::sessiond::trace::abi& trace_abi, |
| 28 | append_metadata_fragment_function append_metadata); |
| 29 | |
| 30 | /* trace class visitor interface. */ |
| 31 | virtual void visit(const lttng::sessiond::trace::trace_class& trace_class) override final; |
| 32 | |
| 33 | /* clock class visitor interface. */ |
| 34 | virtual void visit(const lttng::sessiond::trace::clock_class& clock_class) override final; |
| 35 | |
| 36 | /* environment visitor interface. */ |
| 37 | virtual void environment_begin() override final; |
| 38 | virtual void visit(const lttng::sessiond::trace::environment_field<int64_t>& field) override final; |
| 39 | virtual void visit(const lttng::sessiond::trace::environment_field<const char *>& field) override final; |
| 40 | virtual void environment_end() override final; |
| 41 | |
| 42 | /* stream class visitor interface. */ |
| 43 | virtual void visit(const lttng::sessiond::trace::stream_class& stream_class) override final; |
| 44 | |
| 45 | /* event class visitor interface. */ |
| 46 | virtual void visit(const lttng::sessiond::trace::event_class& event_class) override final; |
| 47 | |
| 48 | private: |
| 49 | /* Coherent (parseable) fragments must be appended. */ |
| 50 | void append_metadata_fragment(const std::string& fragment) const; |
| 51 | |
| 52 | const lttng::sessiond::trace::abi& _trace_abi; |
| 53 | const append_metadata_fragment_function _append_metadata_fragment; |
| 54 | std::string _environment; |
| 55 | }; |
| 56 | |
| 57 | } /* namespace tsdl */ |
| 58 | } /* namespace sessiond */ |
| 59 | } /* namespace lttng */ |
| 60 | |
| 61 | #endif /* LTTNG_TSDL_TRACE_CLASS_VISITOR_H */ |