Commit | Line | Data |
---|---|---|
d28fcdec PP |
1 | /* |
2 | * event-field-value.c | |
3 | * | |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
6 | * Copyright (C) 2020 Philippe Proulx <pproulx@efficios.com> | |
7 | * | |
8 | * SPDX-License-Identifier: LGPL-2.1-only | |
9 | * | |
10 | */ | |
11 | ||
12 | #define _LGPL_SOURCE | |
c9e313bc SM |
13 | #include <common/error.hpp> |
14 | #include <common/macros.hpp> | |
28ab034a | 15 | |
c9e313bc | 16 | #include <lttng/event-field-value-internal.hpp> |
d28fcdec | 17 | |
28ab034a JG |
18 | #include <stdbool.h> |
19 | #include <stddef.h> | |
20 | ||
21 | static struct lttng_event_field_value * | |
22 | create_empty_field_val(enum lttng_event_field_value_type type, size_t size) | |
d28fcdec PP |
23 | { |
24 | struct lttng_event_field_value *field_val; | |
25 | ||
64803277 | 26 | field_val = zmalloc<lttng_event_field_value>(size); |
d28fcdec PP |
27 | if (!field_val) { |
28 | goto end; | |
29 | } | |
30 | ||
31 | field_val->type = type; | |
32 | ||
33 | end: | |
34 | return field_val; | |
35 | } | |
36 | ||
28ab034a | 37 | struct lttng_event_field_value *lttng_event_field_value_uint_create(uint64_t val) |
d28fcdec PP |
38 | { |
39 | struct lttng_event_field_value_uint *field_val; | |
40 | ||
28ab034a JG |
41 | field_val = lttng::utils::container_of( |
42 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_INT, | |
43 | sizeof(*field_val)), | |
44 | <tng_event_field_value_uint::parent); | |
d28fcdec PP |
45 | if (!field_val) { |
46 | goto error; | |
47 | } | |
48 | ||
49 | field_val->val = val; | |
50 | goto end; | |
51 | ||
52 | error: | |
53 | lttng_event_field_value_destroy(&field_val->parent); | |
54 | ||
55 | end: | |
56 | return &field_val->parent; | |
57 | } | |
58 | ||
28ab034a | 59 | struct lttng_event_field_value *lttng_event_field_value_int_create(int64_t val) |
d28fcdec PP |
60 | { |
61 | struct lttng_event_field_value_int *field_val; | |
62 | ||
28ab034a JG |
63 | field_val = lttng::utils::container_of( |
64 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_INT, sizeof(*field_val)), | |
65 | <tng_event_field_value_int::parent); | |
d28fcdec PP |
66 | if (!field_val) { |
67 | goto error; | |
68 | } | |
69 | ||
70 | field_val->val = val; | |
71 | goto end; | |
72 | ||
73 | error: | |
74 | lttng_event_field_value_destroy(&field_val->parent); | |
75 | ||
76 | end: | |
77 | return &field_val->parent; | |
78 | } | |
79 | ||
28ab034a JG |
80 | static struct lttng_event_field_value_enum * |
81 | create_enum_field_val(enum lttng_event_field_value_type type, size_t size) | |
d28fcdec PP |
82 | { |
83 | struct lttng_event_field_value_enum *field_val; | |
84 | ||
0114db0e | 85 | field_val = lttng::utils::container_of(create_empty_field_val(type, size), |
28ab034a | 86 | <tng_event_field_value_enum::parent); |
d28fcdec PP |
87 | if (!field_val) { |
88 | goto error; | |
89 | } | |
90 | ||
91 | lttng_dynamic_pointer_array_init(&field_val->labels, free); | |
92 | goto end; | |
93 | ||
94 | error: | |
95 | lttng_event_field_value_destroy(&field_val->parent); | |
96 | ||
97 | end: | |
98 | return field_val; | |
99 | } | |
100 | ||
28ab034a | 101 | struct lttng_event_field_value *lttng_event_field_value_enum_uint_create(uint64_t val) |
d28fcdec PP |
102 | { |
103 | struct lttng_event_field_value_enum_uint *field_val; | |
104 | ||
28ab034a JG |
105 | field_val = lttng::utils::container_of( |
106 | create_enum_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM, | |
107 | sizeof(*field_val)), | |
108 | <tng_event_field_value_enum_uint::parent); | |
d28fcdec PP |
109 | if (!field_val) { |
110 | goto error; | |
111 | } | |
112 | ||
113 | field_val->val = val; | |
114 | goto end; | |
115 | ||
116 | error: | |
117 | lttng_event_field_value_destroy(&field_val->parent.parent); | |
118 | ||
119 | end: | |
120 | return &field_val->parent.parent; | |
121 | } | |
122 | ||
28ab034a | 123 | struct lttng_event_field_value *lttng_event_field_value_enum_int_create(int64_t val) |
d28fcdec PP |
124 | { |
125 | struct lttng_event_field_value_enum_int *field_val; | |
126 | ||
28ab034a JG |
127 | field_val = lttng::utils::container_of( |
128 | create_enum_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM, sizeof(*field_val)), | |
129 | <tng_event_field_value_enum_int::parent); | |
d28fcdec PP |
130 | if (!field_val) { |
131 | goto error; | |
132 | } | |
133 | ||
134 | field_val->val = val; | |
135 | goto end; | |
136 | ||
137 | error: | |
138 | lttng_event_field_value_destroy(&field_val->parent.parent); | |
139 | ||
140 | end: | |
141 | return &field_val->parent.parent; | |
142 | } | |
143 | ||
d28fcdec PP |
144 | struct lttng_event_field_value *lttng_event_field_value_real_create(double val) |
145 | { | |
0114db0e | 146 | struct lttng_event_field_value_real *field_val = lttng::utils::container_of( |
28ab034a JG |
147 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_REAL, sizeof(*field_val)), |
148 | <tng_event_field_value_real::parent); | |
d28fcdec PP |
149 | |
150 | if (!field_val) { | |
151 | goto error; | |
152 | } | |
153 | ||
154 | field_val->val = val; | |
155 | goto end; | |
156 | ||
157 | error: | |
158 | lttng_event_field_value_destroy(&field_val->parent); | |
159 | ||
160 | end: | |
161 | return &field_val->parent; | |
162 | } | |
163 | ||
28ab034a JG |
164 | struct lttng_event_field_value *lttng_event_field_value_string_create_with_size(const char *val, |
165 | size_t size) | |
d28fcdec | 166 | { |
0114db0e | 167 | struct lttng_event_field_value_string *field_val = lttng::utils::container_of( |
28ab034a JG |
168 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_STRING, sizeof(*field_val)), |
169 | <tng_event_field_value_string::parent); | |
d28fcdec PP |
170 | |
171 | if (!field_val) { | |
172 | goto error; | |
173 | } | |
174 | ||
ceaa850a MD |
175 | if (size) { |
176 | LTTNG_ASSERT(val); | |
177 | field_val->val = strndup(val, size); | |
178 | } else { | |
179 | /* | |
180 | * User code do not expect a NULL string pointer. Populate with | |
181 | * an empty string when length is 0. | |
182 | */ | |
183 | field_val->val = strdup(""); | |
184 | } | |
d28fcdec PP |
185 | if (!field_val->val) { |
186 | goto error; | |
187 | } | |
188 | ||
189 | goto end; | |
190 | ||
191 | error: | |
192 | lttng_event_field_value_destroy(&field_val->parent); | |
193 | ||
194 | end: | |
195 | return &field_val->parent; | |
196 | } | |
197 | ||
28ab034a | 198 | struct lttng_event_field_value *lttng_event_field_value_string_create(const char *val) |
d28fcdec | 199 | { |
a0377dfe | 200 | LTTNG_ASSERT(val); |
28ab034a | 201 | return lttng_event_field_value_string_create_with_size(val, strlen(val)); |
d28fcdec PP |
202 | } |
203 | ||
28ab034a | 204 | static void destroy_field_val(void *field_val) |
d28fcdec | 205 | { |
a6bc4ca9 | 206 | lttng_event_field_value_destroy((lttng_event_field_value *) field_val); |
d28fcdec PP |
207 | } |
208 | ||
cd9adb8b | 209 | struct lttng_event_field_value *lttng_event_field_value_array_create() |
d28fcdec | 210 | { |
0114db0e | 211 | struct lttng_event_field_value_array *field_val = lttng::utils::container_of( |
28ab034a JG |
212 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY, sizeof(*field_val)), |
213 | <tng_event_field_value_array::parent); | |
d28fcdec PP |
214 | |
215 | if (!field_val) { | |
216 | goto error; | |
217 | } | |
218 | ||
219 | lttng_dynamic_pointer_array_init(&field_val->elems, destroy_field_val); | |
220 | goto end; | |
221 | ||
222 | error: | |
223 | lttng_event_field_value_destroy(&field_val->parent); | |
224 | ||
225 | end: | |
226 | return &field_val->parent; | |
227 | } | |
228 | ||
d28fcdec PP |
229 | void lttng_event_field_value_destroy(struct lttng_event_field_value *field_val) |
230 | { | |
231 | if (!field_val) { | |
232 | goto end; | |
233 | } | |
234 | ||
235 | switch (field_val->type) { | |
236 | case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM: | |
237 | case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM: | |
238 | { | |
28ab034a JG |
239 | struct lttng_event_field_value_enum *enum_field_val = lttng::utils::container_of( |
240 | field_val, <tng_event_field_value_enum::parent); | |
d28fcdec PP |
241 | |
242 | lttng_dynamic_pointer_array_reset(&enum_field_val->labels); | |
243 | break; | |
244 | } | |
245 | case LTTNG_EVENT_FIELD_VALUE_TYPE_STRING: | |
246 | { | |
28ab034a JG |
247 | struct lttng_event_field_value_string *str_field_val = lttng::utils::container_of( |
248 | field_val, <tng_event_field_value_string::parent); | |
d28fcdec PP |
249 | |
250 | free(str_field_val->val); | |
251 | break; | |
252 | } | |
253 | case LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY: | |
254 | { | |
28ab034a JG |
255 | struct lttng_event_field_value_array *array_field_expr = lttng::utils::container_of( |
256 | field_val, <tng_event_field_value_array::parent); | |
d28fcdec PP |
257 | |
258 | lttng_dynamic_pointer_array_reset(&array_field_expr->elems); | |
259 | break; | |
260 | } | |
261 | default: | |
262 | break; | |
263 | } | |
264 | ||
265 | free(field_val); | |
266 | ||
267 | end: | |
268 | return; | |
269 | } | |
270 | ||
28ab034a JG |
271 | int lttng_event_field_value_enum_append_label_with_size(struct lttng_event_field_value *field_val, |
272 | const char *label, | |
273 | size_t size) | |
d28fcdec PP |
274 | { |
275 | int ret; | |
276 | char *new_label; | |
277 | ||
a0377dfe FD |
278 | LTTNG_ASSERT(field_val); |
279 | LTTNG_ASSERT(label); | |
d28fcdec PP |
280 | new_label = strndup(label, size); |
281 | if (!new_label) { | |
282 | ret = -1; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | ret = lttng_dynamic_pointer_array_add_pointer( | |
28ab034a JG |
287 | <tng::utils::container_of(field_val, <tng_event_field_value_enum::parent) |
288 | ->labels, | |
289 | new_label); | |
d28fcdec | 290 | if (ret == 0) { |
cd9adb8b | 291 | new_label = nullptr; |
d28fcdec PP |
292 | } |
293 | ||
294 | end: | |
295 | free(new_label); | |
296 | return ret; | |
297 | } | |
298 | ||
28ab034a JG |
299 | int lttng_event_field_value_enum_append_label(struct lttng_event_field_value *field_val, |
300 | const char *label) | |
d28fcdec | 301 | { |
a0377dfe | 302 | LTTNG_ASSERT(label); |
28ab034a | 303 | return lttng_event_field_value_enum_append_label_with_size(field_val, label, strlen(label)); |
d28fcdec PP |
304 | } |
305 | ||
28ab034a JG |
306 | int lttng_event_field_value_array_append(struct lttng_event_field_value *array_field_val, |
307 | struct lttng_event_field_value *field_val) | |
d28fcdec | 308 | { |
a0377dfe FD |
309 | LTTNG_ASSERT(array_field_val); |
310 | LTTNG_ASSERT(field_val); | |
d28fcdec | 311 | return lttng_dynamic_pointer_array_add_pointer( |
28ab034a JG |
312 | <tng::utils::container_of(array_field_val, <tng_event_field_value_array::parent) |
313 | ->elems, | |
314 | field_val); | |
d28fcdec PP |
315 | } |
316 | ||
28ab034a | 317 | int lttng_event_field_value_array_append_unavailable(struct lttng_event_field_value *array_field_val) |
d28fcdec | 318 | { |
a0377dfe | 319 | LTTNG_ASSERT(array_field_val); |
d28fcdec | 320 | return lttng_dynamic_pointer_array_add_pointer( |
28ab034a JG |
321 | <tng::utils::container_of(array_field_val, <tng_event_field_value_array::parent) |
322 | ->elems, | |
cd9adb8b | 323 | nullptr); |
d28fcdec PP |
324 | } |
325 | ||
28ab034a JG |
326 | enum lttng_event_field_value_type |
327 | lttng_event_field_value_get_type(const struct lttng_event_field_value *field_val) | |
d28fcdec PP |
328 | { |
329 | enum lttng_event_field_value_type type; | |
330 | ||
331 | if (!field_val) { | |
332 | type = LTTNG_EVENT_FIELD_VALUE_TYPE_INVALID; | |
333 | goto end; | |
334 | } | |
335 | ||
336 | type = field_val->type; | |
337 | ||
338 | end: | |
339 | return type; | |
340 | } | |
341 | ||
342 | enum lttng_event_field_value_status | |
28ab034a JG |
343 | lttng_event_field_value_unsigned_int_get_value(const struct lttng_event_field_value *field_val, |
344 | uint64_t *val) | |
d28fcdec PP |
345 | { |
346 | enum lttng_event_field_value_status status; | |
347 | ||
348 | if (!field_val || !val) { | |
349 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; | |
350 | goto end; | |
351 | } | |
352 | ||
353 | switch (field_val->type) { | |
354 | case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_INT: | |
28ab034a JG |
355 | *val = lttng::utils::container_of(field_val, <tng_event_field_value_uint::parent) |
356 | ->val; | |
d28fcdec PP |
357 | break; |
358 | case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM: | |
9918e00a | 359 | { |
0114db0e | 360 | const struct lttng_event_field_value_enum *field_val_enum = |
28ab034a JG |
361 | lttng::utils::container_of(field_val, |
362 | <tng_event_field_value_enum::parent); | |
0114db0e | 363 | const struct lttng_event_field_value_enum_uint *field_val_enum_uint = |
28ab034a JG |
364 | lttng::utils::container_of(field_val_enum, |
365 | <tng_event_field_value_enum_uint::parent); | |
9918e00a | 366 | *val = field_val_enum_uint->val; |
d28fcdec | 367 | break; |
9918e00a | 368 | } |
d28fcdec PP |
369 | default: |
370 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; | |
371 | goto end; | |
372 | } | |
373 | ||
374 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; | |
375 | ||
376 | end: | |
377 | return status; | |
378 | } | |
379 | ||
380 | enum lttng_event_field_value_status | |
28ab034a JG |
381 | lttng_event_field_value_signed_int_get_value(const struct lttng_event_field_value *field_val, |
382 | int64_t *val) | |
d28fcdec PP |
383 | { |
384 | enum lttng_event_field_value_status status; | |
385 | ||
386 | if (!field_val || !val) { | |
387 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; | |
388 | goto end; | |
389 | } | |
390 | ||
391 | switch (field_val->type) { | |
392 | case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_INT: | |
28ab034a JG |
393 | *val = lttng::utils::container_of(field_val, <tng_event_field_value_int::parent) |
394 | ->val; | |
d28fcdec PP |
395 | break; |
396 | case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM: | |
9918e00a | 397 | { |
28ab034a JG |
398 | const struct lttng_event_field_value_enum *field_val_enum = |
399 | lttng::utils::container_of(field_val, | |
400 | <tng_event_field_value_enum::parent); | |
0114db0e | 401 | const struct lttng_event_field_value_enum_int *field_val_enum_uint = |
28ab034a JG |
402 | lttng::utils::container_of(field_val_enum, |
403 | <tng_event_field_value_enum_int::parent); | |
9918e00a | 404 | *val = field_val_enum_uint->val; |
d28fcdec | 405 | break; |
9918e00a | 406 | } |
d28fcdec PP |
407 | default: |
408 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; | |
409 | goto end; | |
410 | } | |
411 | ||
412 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; | |
413 | ||
414 | end: | |
415 | return status; | |
416 | } | |
417 | ||
418 | enum lttng_event_field_value_status | |
28ab034a | 419 | lttng_event_field_value_real_get_value(const struct lttng_event_field_value *field_val, double *val) |
d28fcdec PP |
420 | { |
421 | enum lttng_event_field_value_status status; | |
422 | ||
28ab034a | 423 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_REAL || !val) { |
d28fcdec PP |
424 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
425 | goto end; | |
426 | } | |
427 | ||
28ab034a | 428 | *val = lttng::utils::container_of(field_val, <tng_event_field_value_real::parent)->val; |
d28fcdec PP |
429 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
430 | ||
431 | end: | |
432 | return status; | |
433 | } | |
434 | ||
28ab034a | 435 | static bool is_enum_field_val(const struct lttng_event_field_value *field_val) |
d28fcdec PP |
436 | { |
437 | return field_val->type == LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM || | |
438 | field_val->type == LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM; | |
439 | } | |
440 | ||
441 | enum lttng_event_field_value_status | |
28ab034a JG |
442 | lttng_event_field_value_enum_get_label_count(const struct lttng_event_field_value *field_val, |
443 | unsigned int *count) | |
d28fcdec PP |
444 | { |
445 | enum lttng_event_field_value_status status; | |
446 | ||
447 | if (!field_val || !is_enum_field_val(field_val) || !count) { | |
448 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; | |
449 | goto end; | |
450 | } | |
451 | ||
452 | *count = (unsigned int) lttng_dynamic_pointer_array_get_count( | |
28ab034a JG |
453 | <tng::utils::container_of(field_val, <tng_event_field_value_enum::parent) |
454 | ->labels); | |
d28fcdec PP |
455 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
456 | ||
457 | end: | |
458 | return status; | |
459 | } | |
460 | ||
28ab034a JG |
461 | const char * |
462 | lttng_event_field_value_enum_get_label_at_index(const struct lttng_event_field_value *field_val, | |
463 | unsigned int index) | |
d28fcdec PP |
464 | { |
465 | const char *ret; | |
466 | const struct lttng_event_field_value_enum *enum_field_val; | |
467 | ||
468 | if (!field_val || !is_enum_field_val(field_val)) { | |
cd9adb8b | 469 | ret = nullptr; |
d28fcdec PP |
470 | goto end; |
471 | } | |
472 | ||
28ab034a JG |
473 | enum_field_val = |
474 | lttng::utils::container_of(field_val, <tng_event_field_value_enum::parent); | |
d28fcdec PP |
475 | |
476 | if (index >= lttng_dynamic_pointer_array_get_count(&enum_field_val->labels)) { | |
cd9adb8b | 477 | ret = nullptr; |
d28fcdec PP |
478 | goto end; |
479 | } | |
480 | ||
a6bc4ca9 | 481 | ret = (const char *) lttng_dynamic_pointer_array_get_pointer(&enum_field_val->labels, |
28ab034a | 482 | index); |
d28fcdec PP |
483 | |
484 | end: | |
485 | return ret; | |
486 | } | |
487 | ||
28ab034a JG |
488 | enum lttng_event_field_value_status |
489 | lttng_event_field_value_string_get_value(const struct lttng_event_field_value *field_val, | |
490 | const char **value) | |
d28fcdec | 491 | { |
7c920b63 | 492 | enum lttng_event_field_value_status status; |
d28fcdec PP |
493 | |
494 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_STRING) { | |
7c920b63 | 495 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
d28fcdec PP |
496 | goto end; |
497 | } | |
498 | ||
28ab034a JG |
499 | *value = |
500 | lttng::utils::container_of(field_val, <tng_event_field_value_string::parent)->val; | |
7c920b63 | 501 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
d28fcdec PP |
502 | |
503 | end: | |
7c920b63 | 504 | return status; |
d28fcdec PP |
505 | } |
506 | ||
28ab034a JG |
507 | enum lttng_event_field_value_status |
508 | lttng_event_field_value_array_get_length(const struct lttng_event_field_value *field_val, | |
509 | unsigned int *length) | |
d28fcdec PP |
510 | { |
511 | enum lttng_event_field_value_status status; | |
512 | ||
28ab034a | 513 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY || !length) { |
d28fcdec PP |
514 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
515 | goto end; | |
516 | } | |
517 | ||
518 | *length = (unsigned int) lttng_dynamic_pointer_array_get_count( | |
28ab034a JG |
519 | <tng::utils::container_of(field_val, <tng_event_field_value_array::parent) |
520 | ->elems); | |
d28fcdec PP |
521 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
522 | ||
523 | end: | |
524 | return status; | |
525 | } | |
526 | ||
28ab034a JG |
527 | enum lttng_event_field_value_status lttng_event_field_value_array_get_element_at_index( |
528 | const struct lttng_event_field_value *field_val, | |
529 | unsigned int index, | |
530 | const struct lttng_event_field_value **elem_field_val) | |
d28fcdec PP |
531 | { |
532 | enum lttng_event_field_value_status status; | |
533 | const struct lttng_event_field_value_array *array_field_val; | |
534 | ||
535 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY || | |
28ab034a | 536 | !elem_field_val) { |
d28fcdec PP |
537 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
538 | goto end; | |
539 | } | |
540 | ||
28ab034a JG |
541 | array_field_val = |
542 | lttng::utils::container_of(field_val, <tng_event_field_value_array::parent); | |
d28fcdec PP |
543 | |
544 | if (index >= lttng_dynamic_pointer_array_get_count(&array_field_val->elems)) { | |
545 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; | |
546 | goto end; | |
547 | } | |
548 | ||
a6bc4ca9 | 549 | *elem_field_val = (lttng_event_field_value *) lttng_dynamic_pointer_array_get_pointer( |
28ab034a | 550 | &array_field_val->elems, index); |
d28fcdec PP |
551 | if (*elem_field_val) { |
552 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; | |
553 | } else { | |
554 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_UNAVAILABLE; | |
555 | } | |
556 | ||
557 | end: | |
558 | return status; | |
559 | } |