2 * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
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.
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
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
18 #include <lttng/notification/notification-internal.h>
19 #include <lttng/condition/condition-internal.h>
20 #include <lttng/condition/evaluation-internal.h>
21 #include <lttng/condition/condition.h>
22 #include <lttng/condition/evaluation.h>
26 struct lttng_notification
*lttng_notification_create(
27 struct lttng_condition
*condition
,
28 struct lttng_evaluation
*evaluation
)
30 struct lttng_notification
*notification
= NULL
;
32 if (!condition
|| !evaluation
) {
36 notification
= zmalloc(sizeof(struct lttng_notification
));
41 notification
->condition
= condition
;
42 notification
->evaluation
= evaluation
;
43 notification
->owns_elements
= false;
49 int lttng_notification_serialize(struct lttng_notification
*notification
,
50 struct lttng_dynamic_buffer
*buf
)
53 size_t header_offset
, size_before_payload
;
54 struct lttng_notification_comm notification_comm
= { 0 };
55 struct lttng_notification_comm
*header
;
57 header_offset
= buf
->size
;
58 ret
= lttng_dynamic_buffer_append(buf
, ¬ification_comm
,
59 sizeof(notification_comm
));
61 size_before_payload
= buf
->size
;
62 ret
= lttng_condition_serialize(notification
->condition
,
68 ret
= lttng_evaluation_serialize(notification
->evaluation
, buf
);
73 /* Update payload size. */
74 header
= (struct lttng_notification_comm
*) ((char *) buf
->data
+ header_offset
);
75 header
->length
= (uint32_t) (buf
->size
- size_before_payload
);
82 ssize_t
lttng_notification_create_from_buffer(
83 const struct lttng_buffer_view
*src_view
,
84 struct lttng_notification
**notification
)
86 ssize_t ret
, notification_size
= 0, condition_size
, evaluation_size
;
87 const struct lttng_notification_comm
*notification_comm
;
88 struct lttng_condition
*condition
;
89 struct lttng_evaluation
*evaluation
;
90 struct lttng_buffer_view condition_view
;
91 struct lttng_buffer_view evaluation_view
;
93 if (!src_view
|| !notification
) {
99 (const struct lttng_notification_comm
*) src_view
->data
;
100 notification_size
+= sizeof(*notification_comm
);
102 /* struct lttng_condition */
103 condition_view
= lttng_buffer_view_from_view(src_view
,
104 sizeof(*notification_comm
), -1);
105 condition_size
= lttng_condition_create_from_buffer(&condition_view
,
107 if (condition_size
< 0) {
108 ret
= condition_size
;
111 notification_size
+= condition_size
;
113 /* struct lttng_evaluation */
114 evaluation_view
= lttng_buffer_view_from_view(&condition_view
,
116 evaluation_size
= lttng_evaluation_create_from_buffer(&evaluation_view
,
118 if (evaluation_size
< 0) {
119 ret
= evaluation_size
;
122 notification_size
+= evaluation_size
;
124 /* Unexpected size of inner-elements; the buffer is corrupted. */
125 if ((ssize_t
) notification_comm
->length
!=
126 condition_size
+ evaluation_size
) {
131 *notification
= lttng_notification_create(condition
, evaluation
);
132 if (!*notification
) {
136 ret
= notification_size
;
137 (*notification
)->owns_elements
= true;
141 lttng_condition_destroy(condition
);
142 lttng_evaluation_destroy(evaluation
);
146 void lttng_notification_destroy(struct lttng_notification
*notification
)
152 if (notification
->owns_elements
) {
153 lttng_condition_destroy(notification
->condition
);
154 lttng_evaluation_destroy(notification
->evaluation
);
159 const struct lttng_condition
*lttng_notification_get_condition(
160 struct lttng_notification
*notification
)
162 return notification
? notification
->condition
: NULL
;
165 const struct lttng_evaluation
*lttng_notification_get_evaluation(
166 struct lttng_notification
*notification
)
168 return notification
? notification
->evaluation
: NULL
;