Build fix: unknown warning -Wduplicated-branches
[lttng-tools.git] / src / bin / lttng-sessiond / trace-class.hpp
CommitLineData
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
13namespace lttng {
14namespace sessiond {
15namespace trace {
16
17class clock_class;
18class stream_class;
19class event_class;
20class trace_class_visitor;
21
22enum class byte_order {
23 BIG_ENDIAN_,
24 LITTLE_ENDIAN_,
25};
26
27struct 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
37template <class ValueType>
38class environment_field {
39public:
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
49class trace_class {
50public:
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
62protected:
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
69class trace_class_visitor {
70public:
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 */
This page took 0.02646 seconds and 4 git commands to generate.