e22cb762a7b7a05e483677d4453c1befeffd2fcc
[lttng-tools.git] / include / lttng / condition / on-event-internal.h
1 /*
2 * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
3 *
4 * SPDX-License-Identifier: LGPL-2.1-only
5 *
6 */
7
8 #ifndef LTTNG_CONDITION_ON_EVENT_INTERNAL_H
9 #define LTTNG_CONDITION_ON_EVENT_INTERNAL_H
10
11 #include <lttng/condition/condition-internal.h>
12 #include <common/buffer-view.h>
13 #include <common/macros.h>
14 #include <lttng/condition/evaluation-internal.h>
15 #include <common/dynamic-array.h>
16 #include <lttng/event-field-value.h>
17
18 struct lttng_capture_descriptor {
19 struct lttng_event_expr *event_expression;
20 struct lttng_bytecode *bytecode;
21 };
22
23 struct lttng_condition_on_event {
24 struct lttng_condition parent;
25 struct lttng_event_rule *rule;
26
27 /* Array of `struct lttng_capture_descriptor *`. */
28 struct lttng_dynamic_pointer_array capture_descriptors;
29 };
30
31 struct lttng_evaluation_on_event {
32 struct lttng_evaluation parent;
33 char *name;
34
35 /* MessagePack-encoded captured event field values. */
36 struct lttng_dynamic_buffer capture_payload;
37
38 /*
39 * The content of this array event field value is the decoded
40 * version of `capture_payload` above.
41 *
42 * This is a cache: it's not serialized/deserialized in
43 * communications from/to the library and the session daemon.
44 */
45 struct lttng_event_field_value *captured_values;
46 };
47
48 struct lttng_evaluation_on_event_comm {
49 /* Includes the null terminator. */
50 uint32_t trigger_name_length;
51 /* Trigger name. */
52 char payload[];
53 } LTTNG_PACKED;
54
55 LTTNG_HIDDEN
56 ssize_t lttng_condition_on_event_create_from_payload(
57 struct lttng_payload_view *view,
58 struct lttng_condition **condition);
59
60 LTTNG_HIDDEN
61 enum lttng_condition_status
62 lttng_condition_on_event_borrow_rule_mutable(
63 const struct lttng_condition *condition,
64 struct lttng_event_rule **rule);
65
66 LTTNG_HIDDEN
67 struct lttng_evaluation *lttng_evaluation_on_event_create(
68 const struct lttng_condition_on_event *condition,
69 const char* trigger_name,
70 const char *capture_payload, size_t capture_payload_size,
71 bool decode_capture_payload);
72
73 LTTNG_HIDDEN
74 ssize_t lttng_evaluation_on_event_create_from_payload(
75 const struct lttng_condition_on_event *condition,
76 struct lttng_payload_view *view,
77 struct lttng_evaluation **_evaluation);
78
79 LTTNG_HIDDEN
80 enum lttng_error_code
81 lttng_condition_on_event_generate_capture_descriptor_bytecode(
82 struct lttng_condition *condition);
83
84 LTTNG_HIDDEN
85 const struct lttng_bytecode *
86 lttng_condition_on_event_get_capture_bytecode_at_index(
87 const struct lttng_condition *condition, unsigned int index);
88
89 #endif /* LTTNG_CONDITION_ON_EVENT_INTERNAL_H */
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