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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/condition-internal.h> | |
19 | #include <lttng/condition/buffer-usage-internal.h> | |
e8360425 | 20 | #include <lttng/condition/session-consumed-size-internal.h> |
a58c490f JG |
21 | #include <common/macros.h> |
22 | #include <common/error.h> | |
23 | #include <common/dynamic-buffer.h> | |
24 | #include <common/buffer-view.h> | |
25 | #include <stdbool.h> | |
26 | #include <assert.h> | |
27 | ||
28 | enum lttng_condition_type lttng_condition_get_type( | |
29 | const struct lttng_condition *condition) | |
30 | { | |
31 | return condition ? condition->type : LTTNG_CONDITION_TYPE_UNKNOWN; | |
32 | } | |
33 | ||
34 | void lttng_condition_destroy(struct lttng_condition *condition) | |
35 | { | |
36 | if (!condition) { | |
37 | return; | |
38 | } | |
39 | ||
40 | assert(condition->destroy); | |
41 | condition->destroy(condition); | |
42 | } | |
43 | ||
44 | LTTNG_HIDDEN | |
45 | bool lttng_condition_validate(const struct lttng_condition *condition) | |
46 | { | |
47 | bool valid; | |
48 | ||
49 | if (!condition) { | |
50 | valid = false; | |
51 | goto end; | |
52 | } | |
53 | ||
54 | if (!condition->validate) { | |
55 | /* Sub-class guarantees that it can never be invalid. */ | |
56 | valid = true; | |
57 | goto end; | |
58 | } | |
59 | ||
60 | valid = condition->validate(condition); | |
61 | end: | |
62 | return valid; | |
63 | } | |
64 | ||
65 | LTTNG_HIDDEN | |
66 | ssize_t lttng_condition_serialize(const struct lttng_condition *condition, | |
67 | char *buf) | |
68 | { | |
69 | ssize_t ret, condition_size; | |
d184b96c | 70 | struct lttng_condition_comm condition_comm = { |
68f4e86d JG |
71 | .condition_type = (int8_t) (condition ? |
72 | condition->type : LTTNG_CONDITION_TYPE_UNKNOWN) | |
d184b96c | 73 | }; |
a58c490f JG |
74 | |
75 | if (!condition) { | |
76 | ret = -1; | |
77 | goto end; | |
78 | } | |
79 | ||
a58c490f JG |
80 | ret = sizeof(struct lttng_condition_comm); |
81 | if (buf) { | |
82 | memcpy(buf, &condition_comm, ret); | |
83 | buf += ret; | |
84 | } | |
85 | ||
86 | condition_size = condition->serialize(condition, buf); | |
87 | if (condition_size < 0) { | |
88 | ret = condition_size; | |
89 | goto end; | |
90 | } | |
91 | ret += condition_size; | |
92 | end: | |
93 | return ret; | |
94 | } | |
95 | ||
96 | LTTNG_HIDDEN | |
97 | bool lttng_condition_is_equal(const struct lttng_condition *a, | |
98 | const struct lttng_condition *b) | |
99 | { | |
100 | bool is_equal = false; | |
101 | ||
102 | if (!a || !b) { | |
103 | goto end; | |
104 | } | |
105 | ||
106 | if (a->type != b->type) { | |
107 | goto end; | |
108 | } | |
109 | ||
110 | is_equal = a->equal ? a->equal(a, b) : true; | |
111 | end: | |
112 | return is_equal; | |
113 | } | |
114 | ||
115 | LTTNG_HIDDEN | |
116 | ssize_t lttng_condition_create_from_buffer( | |
117 | const struct lttng_buffer_view *buffer, | |
118 | struct lttng_condition **condition) | |
119 | { | |
120 | ssize_t ret, condition_size = 0; | |
121 | const struct lttng_condition_comm *condition_comm; | |
122 | condition_create_from_buffer_cb create_from_buffer = NULL; | |
123 | ||
124 | if (!buffer || !condition) { | |
125 | ret = -1; | |
126 | goto end; | |
127 | } | |
128 | ||
129 | DBG("Deserializing condition from buffer"); | |
130 | condition_comm = (const struct lttng_condition_comm *) buffer->data; | |
131 | condition_size += sizeof(*condition_comm); | |
132 | ||
133 | switch ((enum lttng_condition_type) condition_comm->condition_type) { | |
134 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
135 | create_from_buffer = lttng_condition_buffer_usage_low_create_from_buffer; | |
136 | break; | |
137 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
138 | create_from_buffer = lttng_condition_buffer_usage_high_create_from_buffer; | |
139 | break; | |
e8360425 JD |
140 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: |
141 | create_from_buffer = lttng_condition_session_consumed_size_create_from_buffer; | |
142 | break; | |
a58c490f JG |
143 | default: |
144 | ERR("Attempted to create condition of unknown type (%i)", | |
145 | (int) condition_comm->condition_type); | |
146 | ret = -1; | |
147 | goto end; | |
148 | } | |
149 | ||
150 | if (create_from_buffer) { | |
151 | const struct lttng_buffer_view view = | |
152 | lttng_buffer_view_from_view(buffer, | |
153 | sizeof(*condition_comm), -1); | |
154 | ||
155 | ret = create_from_buffer(&view, condition); | |
156 | if (ret < 0) { | |
157 | goto end; | |
158 | } | |
159 | condition_size += ret; | |
160 | ||
161 | } else { | |
162 | abort(); | |
163 | } | |
164 | ||
165 | ret = condition_size; | |
166 | end: | |
167 | return ret; | |
168 | } | |
169 | ||
170 | LTTNG_HIDDEN | |
171 | void lttng_condition_init(struct lttng_condition *condition, | |
172 | enum lttng_condition_type type) | |
173 | { | |
174 | condition->type = type; | |
175 | } |