SoW-2019-0002: Dynamic Snapshot
[lttng-tools.git] / src / common / evaluation.c
CommitLineData
a58c490f 1/*
ab5be9fa 2 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
a58c490f 3 *
ab5be9fa 4 * SPDX-License-Identifier: LGPL-2.1-only
a58c490f 5 *
a58c490f
JG
6 */
7
8#include <lttng/condition/evaluation-internal.h>
9#include <lttng/condition/buffer-usage-internal.h>
e8360425 10#include <lttng/condition/session-consumed-size-internal.h>
c19092cd 11#include <lttng/condition/session-rotation-internal.h>
1831ae68 12#include <lttng/condition/event-rule-internal.h>
a58c490f
JG
13#include <common/macros.h>
14#include <common/error.h>
15#include <stdbool.h>
16#include <assert.h>
17
c19092cd
JG
18LTTNG_HIDDEN
19void lttng_evaluation_init(struct lttng_evaluation *evaluation,
20 enum lttng_condition_type type)
21{
22 evaluation->type = type;
23}
24
a58c490f 25LTTNG_HIDDEN
9b63a4aa 26int lttng_evaluation_serialize(const struct lttng_evaluation *evaluation,
3647288f 27 struct lttng_dynamic_buffer *buf)
a58c490f 28{
3647288f 29 int ret;
db315d75
JG
30 struct lttng_evaluation_comm evaluation_comm = {
31 .type = (int8_t) evaluation->type
32 };
a58c490f 33
3647288f
JG
34 ret = lttng_dynamic_buffer_append(buf, &evaluation_comm,
35 sizeof(evaluation_comm));
36 if (ret) {
37 goto end;
a58c490f 38 }
a58c490f
JG
39
40 if (evaluation->serialize) {
3647288f
JG
41 ret = evaluation->serialize(evaluation, buf);
42 if (ret) {
a58c490f
JG
43 goto end;
44 }
a58c490f 45 }
a58c490f
JG
46end:
47 return ret;
48}
49
50LTTNG_HIDDEN
51ssize_t lttng_evaluation_create_from_buffer(
52 const struct lttng_buffer_view *src_view,
53 struct lttng_evaluation **evaluation)
54{
55 ssize_t ret, evaluation_size = 0;
56 const struct lttng_evaluation_comm *evaluation_comm;
57 const struct lttng_buffer_view evaluation_view =
58 lttng_buffer_view_from_view(src_view,
59 sizeof(*evaluation_comm), -1);
60
61 if (!src_view || !evaluation) {
62 ret = -1;
63 goto end;
64 }
65
66 evaluation_comm = (const struct lttng_evaluation_comm *) src_view->data;
67 evaluation_size += sizeof(*evaluation_comm);
68
69 switch ((enum lttng_condition_type) evaluation_comm->type) {
70 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
71 ret = lttng_evaluation_buffer_usage_low_create_from_buffer(
72 &evaluation_view, evaluation);
73 if (ret < 0) {
74 goto end;
75 }
76 evaluation_size += ret;
77 break;
78 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
79 ret = lttng_evaluation_buffer_usage_high_create_from_buffer(
80 &evaluation_view, evaluation);
81 if (ret < 0) {
82 goto end;
83 }
84 evaluation_size += ret;
85 break;
e8360425
JD
86 case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
87 ret = lttng_evaluation_session_consumed_size_create_from_buffer(
88 &evaluation_view, evaluation);
89 if (ret < 0) {
90 goto end;
91 }
92 evaluation_size += ret;
93 break;
c19092cd
JG
94 case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
95 ret = lttng_evaluation_session_rotation_ongoing_create_from_buffer(
96 &evaluation_view, evaluation);
97 if (ret < 0) {
98 goto end;
99 }
100 evaluation_size += ret;
101 break;
102 case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
103 ret = lttng_evaluation_session_rotation_completed_create_from_buffer(
104 &evaluation_view, evaluation);
105 if (ret < 0) {
106 goto end;
107 }
108 evaluation_size += ret;
109 break;
1831ae68
FD
110 case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
111 ret = lttng_evaluation_event_rule_create_from_buffer(&evaluation_view, evaluation);
112 if (ret < 0) {
113 goto end;
114 }
115 evaluation_size += ret;
116 break;
a58c490f
JG
117 default:
118 ERR("Attempted to create evaluation of unknown type (%i)",
119 (int) evaluation_comm->type);
120 ret = -1;
121 goto end;
122 }
123 ret = evaluation_size;
124end:
125 return ret;
126}
127
128enum lttng_condition_type lttng_evaluation_get_type(
129 const struct lttng_evaluation *evaluation)
130{
131 return evaluation ? evaluation->type : LTTNG_CONDITION_TYPE_UNKNOWN;
132}
133
134void lttng_evaluation_destroy(struct lttng_evaluation *evaluation)
135{
136 if (!evaluation) {
137 return;
138 }
139
140 assert(evaluation->destroy);
141 evaluation->destroy(evaluation);
142}
This page took 0.065743 seconds and 5 git commands to generate.