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d7bfb9b0 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_UST_REGISTRY_CHANNEL_H | |
9 | #define LTTNG_UST_REGISTRY_CHANNEL_H | |
10 | ||
11 | #include "stream-class.hpp" | |
058a2241 | 12 | #include "trace-class.hpp" |
d7bfb9b0 JG |
13 | |
14 | #include <common/hashtable/hashtable.hpp> | |
15 | ||
16 | #include <lttng/lttng.h> | |
17 | ||
18 | #include <urcu.h> | |
19 | #include <functional> | |
20 | ||
21 | struct ust_app; | |
22 | ||
23 | namespace lttng { | |
24 | namespace sessiond { | |
25 | namespace ust { | |
26 | ||
27 | class registry_event; | |
28 | ||
29 | class registry_channel : public lttng::sessiond::trace::stream_class { | |
30 | public: | |
31 | using registered_listener_fn = std::function<void(const registry_channel&)>; | |
32 | using event_added_listener_fn = std::function<void(const registry_channel&, const registry_event &)>; | |
33 | ||
34 | registry_channel(uint32_t channel_id, | |
058a2241 JG |
35 | const lttng::sessiond::trace::abi& trace_abi, |
36 | std::string default_clock_class_name, | |
d7bfb9b0 JG |
37 | registered_listener_fn channel_registered_listener, |
38 | event_added_listener_fn new_event_listener); | |
39 | void add_event(int session_objd, | |
40 | int channel_objd, | |
41 | std::string name, | |
42 | std::string signature, | |
43 | std::vector<lttng::sessiond::trace::field::cuptr> event_fields, | |
44 | int loglevel_value, | |
45 | nonstd::optional<std::string> model_emf_uri, | |
46 | lttng_buffer_type buffer_type, | |
47 | const ust_app& app, | |
48 | uint32_t& out_event_id); | |
49 | virtual ~registry_channel(); | |
50 | ||
058a2241 JG |
51 | virtual const lttng::sessiond::trace::type *get_event_context() const override final; |
52 | void set_event_context(lttng::sessiond::trace::type::cuptr context); | |
d7bfb9b0 JG |
53 | |
54 | /* Channel was registered to at least one application. */ | |
55 | bool is_registered() const; | |
56 | void set_as_registered(); | |
57 | ||
58 | uint64_t _key; | |
59 | uint64_t _consumer_key; | |
60 | ||
d7bfb9b0 JG |
61 | /* |
62 | * Hash table containing events sent by the UST tracer. MUST be accessed | |
63 | * with a RCU read side lock acquired. | |
64 | */ | |
65 | struct lttng_ht *_events; | |
66 | struct lttng_ht_node_u64 _node; | |
67 | /* For delayed reclaim */ | |
68 | struct rcu_head _rcu_head; | |
69 | /* Once this value reaches UINT32_MAX, no more id can be allocated. */ | |
70 | uint32_t _next_event_id; | |
71 | ||
72 | private: | |
73 | virtual void _accept_on_event_classes( | |
74 | lttng::sessiond::trace::trace_class_visitor& trace_class_visitor) const override final; | |
75 | ||
76 | registered_listener_fn _is_registered_listener; | |
77 | event_added_listener_fn _event_added_listener; | |
78 | /* Indicates if this channel registry has already been registered. */ | |
79 | bool _is_registered; | |
80 | }; | |
81 | ||
82 | } /* namespace ust */ | |
83 | } /* namespace sessiond */ | |
84 | } /* namespace lttng */ | |
85 | ||
86 | #endif /* LTTNG_UST_REGISTRY_CHANNEL_H */ |