projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 0220be14 JG |
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_TRACE_CLASS_H | |
| 9 | #define LTTNG_TRACE_CLASS_H | |
| 10 | ||
| 11 | #include <common/uuid.hpp> | |
| 12 | ||
| 13 | namespace lttng { | |
| 14 | namespace sessiond { | |
| 15 | namespace trace { | |
| 16 | ||
| 17 | class clock_class; | |
| 18 | class stream_class; | |
| 19 | class event_class; | |
| 20 | class trace_class_visitor; | |
| 21 | ||
| 22 | enum class byte_order { | |
| 23 | BIG_ENDIAN_, | |
| 24 | LITTLE_ENDIAN_, | |
| 25 | }; | |
| 26 | ||
| 27 | struct abi { | |
| 28 | unsigned int bits_per_long; | |
| 29 | unsigned int long_alignment; | |
| 30 | unsigned int uint8_t_alignment; | |
| 31 | unsigned int uint16_t_alignment; | |
| 32 | unsigned int uint32_t_alignment; | |
| 33 | unsigned int uint64_t_alignment; | |
| 34 | enum byte_order byte_order; | |
| 35 | }; | |
| 36 | ||
| 37 | template <class ValueType> | |
| 38 | class environment_field { | |
| 39 | public: | |
| 40 | environment_field(const char *in_name, const ValueType& in_value) : | |
| 41 | name(in_name), value(in_value) | |
| 42 | { | |
| 43 | } | |
| 44 | ||
| 45 | const char * const name; | |
| 46 | const ValueType& value; | |
| 47 | }; | |
| 48 | ||
| 49 | class trace_class { | |
| 50 | public: | |
| 51 | /* | |
| 52 | * Derived classes must implement the _accept_on_*() | |
| 53 | * to continue the traversal to the trace class' children. | |
| 54 | */ | |
| 55 | virtual void accept(trace_class_visitor& trace_class_visitor) const; | |
| 56 | ||
| 57 | virtual ~trace_class() = default; | |
| 58 | ||
| 59 | const struct abi abi; | |
| 60 | const lttng_uuid uuid; | |
| 61 | ||
| 62 | protected: | |
| 63 | trace_class(const struct abi& abi, const lttng_uuid& trace_uuid); | |
| 64 | virtual void _accept_on_clock_classes(trace_class_visitor& trace_class_visitor) const = 0; | |
| 65 | virtual void _visit_environment(trace_class_visitor& trace_class_visitor) const = 0; | |
| 66 | virtual void _accept_on_stream_classes(trace_class_visitor& trace_class_visitor) const = 0; | |
| 67 | }; | |
| 68 | ||
| 69 | class trace_class_visitor { | |
| 70 | public: | |
| 71 | using cuptr = std::unique_ptr<trace_class_visitor>; | |
| 72 | ||
| 73 | virtual ~trace_class_visitor() = default; | |
| 74 | ||
| 75 | /* trace class visitor interface. */ | |
| 76 | virtual void visit(const lttng::sessiond::trace::trace_class& trace_class) = 0; | |
| 77 | ||
| 78 | /* clock class visitor interface. */ | |
| 79 | virtual void visit(const lttng::sessiond::trace::clock_class& clock_class) = 0; | |
| 80 | ||
| 81 | /* environment visitor interface. */ | |
| 82 | virtual void environment_begin() = 0; | |
| 83 | virtual void visit(const environment_field<int64_t>& field) = 0; | |
| 84 | virtual void visit(const environment_field<const char *>& field) = 0; | |
| 85 | void visit(const environment_field<std::string>& field); | |
| 86 | virtual void environment_end() = 0; | |
| 87 | ||
| 88 | /* stream class visitor interface. */ | |
| 89 | virtual void visit(const lttng::sessiond::trace::stream_class& stream_class) = 0; | |
| 90 | ||
| 91 | /* event class visitor interface. */ | |
| 92 | virtual void visit(const lttng::sessiond::trace::event_class& event_class) = 0; | |
| 93 | }; | |
| 94 | ||
| 95 | } /* namespace trace */ | |
| 96 | } /* namespace sessiond */ | |
| 97 | } /* namespace lttng */ | |
| 98 | ||
| 99 | #endif /* LTTNG_TRACE_CLASS_H */ |