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a58c490f JG |
1 | /* |
2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
11 | * for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public License | |
14 | * along with this library; if not, write to the Free Software Foundation, | |
15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
18 | #include <lttng/condition/evaluation-internal.h> | |
19 | #include <lttng/condition/buffer-usage-internal.h> | |
20 | #include <common/macros.h> | |
21 | #include <common/error.h> | |
22 | #include <stdbool.h> | |
23 | #include <assert.h> | |
24 | ||
25 | LTTNG_HIDDEN | |
26 | ssize_t lttng_evaluation_serialize(struct lttng_evaluation *evaluation, | |
27 | char *buf) | |
28 | { | |
29 | ssize_t ret, offset = 0; | |
db315d75 JG |
30 | struct lttng_evaluation_comm evaluation_comm = { |
31 | .type = (int8_t) evaluation->type | |
32 | }; | |
a58c490f | 33 | |
a58c490f JG |
34 | if (buf) { |
35 | memcpy(buf, &evaluation_comm, sizeof(evaluation_comm)); | |
36 | } | |
37 | offset += sizeof(evaluation_comm); | |
38 | ||
39 | if (evaluation->serialize) { | |
40 | ret = evaluation->serialize(evaluation, | |
41 | buf ? (buf + offset) : NULL); | |
42 | if (ret < 0) { | |
43 | goto end; | |
44 | } | |
45 | offset += ret; | |
46 | } | |
47 | ||
48 | ret = offset; | |
49 | end: | |
50 | return ret; | |
51 | } | |
52 | ||
53 | LTTNG_HIDDEN | |
54 | ssize_t lttng_evaluation_create_from_buffer( | |
55 | const struct lttng_buffer_view *src_view, | |
56 | struct lttng_evaluation **evaluation) | |
57 | { | |
58 | ssize_t ret, evaluation_size = 0; | |
59 | const struct lttng_evaluation_comm *evaluation_comm; | |
60 | const struct lttng_buffer_view evaluation_view = | |
61 | lttng_buffer_view_from_view(src_view, | |
62 | sizeof(*evaluation_comm), -1); | |
63 | ||
64 | if (!src_view || !evaluation) { | |
65 | ret = -1; | |
66 | goto end; | |
67 | } | |
68 | ||
69 | evaluation_comm = (const struct lttng_evaluation_comm *) src_view->data; | |
70 | evaluation_size += sizeof(*evaluation_comm); | |
71 | ||
72 | switch ((enum lttng_condition_type) evaluation_comm->type) { | |
73 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
74 | ret = lttng_evaluation_buffer_usage_low_create_from_buffer( | |
75 | &evaluation_view, evaluation); | |
76 | if (ret < 0) { | |
77 | goto end; | |
78 | } | |
79 | evaluation_size += ret; | |
80 | break; | |
81 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
82 | ret = lttng_evaluation_buffer_usage_high_create_from_buffer( | |
83 | &evaluation_view, evaluation); | |
84 | if (ret < 0) { | |
85 | goto end; | |
86 | } | |
87 | evaluation_size += ret; | |
88 | break; | |
89 | default: | |
90 | ERR("Attempted to create evaluation of unknown type (%i)", | |
91 | (int) evaluation_comm->type); | |
92 | ret = -1; | |
93 | goto end; | |
94 | } | |
95 | ret = evaluation_size; | |
96 | end: | |
97 | return ret; | |
98 | } | |
99 | ||
100 | enum lttng_condition_type lttng_evaluation_get_type( | |
101 | const struct lttng_evaluation *evaluation) | |
102 | { | |
103 | return evaluation ? evaluation->type : LTTNG_CONDITION_TYPE_UNKNOWN; | |
104 | } | |
105 | ||
106 | void lttng_evaluation_destroy(struct lttng_evaluation *evaluation) | |
107 | { | |
108 | if (!evaluation) { | |
109 | return; | |
110 | } | |
111 | ||
112 | assert(evaluation->destroy); | |
113 | evaluation->destroy(evaluation); | |
114 | } |