1 /*
2 * List element functions
3 *
4 * Copyright (C) 2006-2020, Joachim Metz <joachim.metz@gmail.com>
5 *
6 * Refer to AUTHORS for acknowledgements.
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this program. If not, see <https://www.gnu.org/licenses/>.
20 */
21
22 #include <common.h>
23 #include <memory.h>
24 #include <types.h>
25
26 #include "libcdata_libcerror.h"
27 #include "libcdata_libcthreads.h"
28 #include "libcdata_list_element.h"
29 #include "libcdata_types.h"
30
31 /* Creates a list element
32 * Make sure the value element is referencing, is set to NULL
33 * Returns 1 if successful or -1 on error
34 */
libcdata_list_element_initialize(libcdata_list_element_t ** element,libcerror_error_t ** error)35 int libcdata_list_element_initialize(
36 libcdata_list_element_t **element,
37 libcerror_error_t **error )
38 {
39 libcdata_internal_list_element_t *internal_element = NULL;
40 static char *function = "libcdata_list_element_initialize";
41
42 if( element == NULL )
43 {
44 libcerror_error_set(
45 error,
46 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
47 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
48 "%s: invalid list element.",
49 function );
50
51 return( -1 );
52 }
53 if( *element != NULL )
54 {
55 libcerror_error_set(
56 error,
57 LIBCERROR_ERROR_DOMAIN_RUNTIME,
58 LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
59 "%s: invalid element value already set.",
60 function );
61
62 return( -1 );
63 }
64 internal_element = memory_allocate_structure(
65 libcdata_internal_list_element_t );
66
67 if( internal_element == NULL )
68 {
69 libcerror_error_set(
70 error,
71 LIBCERROR_ERROR_DOMAIN_MEMORY,
72 LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
73 "%s: unable to create list element.",
74 function );
75
76 goto on_error;
77 }
78 if( memory_set(
79 internal_element,
80 0,
81 sizeof( libcdata_internal_list_element_t ) ) == NULL )
82 {
83 libcerror_error_set(
84 error,
85 LIBCERROR_ERROR_DOMAIN_MEMORY,
86 LIBCERROR_MEMORY_ERROR_SET_FAILED,
87 "%s: unable to clear list element.",
88 function );
89
90 memory_free(
91 internal_element );
92
93 return( -1 );
94 }
95 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
96 if( libcthreads_read_write_lock_initialize(
97 &( internal_element->read_write_lock ),
98 error ) != 1 )
99 {
100 libcerror_error_set(
101 error,
102 LIBCERROR_ERROR_DOMAIN_RUNTIME,
103 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
104 "%s: unable to initialize read/write lock.",
105 function );
106
107 goto on_error;
108 }
109 #endif
110 *element = (libcdata_list_element_t *) internal_element;
111
112 return( 1 );
113
114 on_error:
115 if( internal_element != NULL )
116 {
117 memory_free(
118 internal_element );
119 }
120 return( -1 );
121 }
122
123 /* Frees a list element
124 * Uses the value_free_function to free the element value
125 * Returns 1 if successful or -1 on error
126 */
libcdata_list_element_free(libcdata_list_element_t ** element,int (* value_free_function)(intptr_t ** value,libcerror_error_t ** error),libcerror_error_t ** error)127 int libcdata_list_element_free(
128 libcdata_list_element_t **element,
129 int (*value_free_function)(
130 intptr_t **value,
131 libcerror_error_t **error ),
132 libcerror_error_t **error )
133 {
134 libcdata_internal_list_element_t *internal_element = NULL;
135 static char *function = "libcdata_list_element_free";
136 int result = 1;
137
138 if( element == NULL )
139 {
140 libcerror_error_set(
141 error,
142 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
143 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
144 "%s: invalid list element.",
145 function );
146
147 return( -1 );
148 }
149 if( *element != NULL )
150 {
151 internal_element = (libcdata_internal_list_element_t *) *element;
152
153 if( ( internal_element->previous_element != NULL )
154 || ( internal_element->next_element != NULL ) )
155 {
156 libcerror_error_set(
157 error,
158 LIBCERROR_ERROR_DOMAIN_RUNTIME,
159 LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
160 "%s: list element part of a list.",
161 function );
162
163 return( -1 );
164 }
165 *element = NULL;
166
167 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
168 if( libcthreads_read_write_lock_free(
169 &( internal_element->read_write_lock ),
170 error ) != 1 )
171 {
172 libcerror_error_set(
173 error,
174 LIBCERROR_ERROR_DOMAIN_RUNTIME,
175 LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
176 "%s: unable to free read/write lock.",
177 function );
178
179 result = -1;
180 }
181 #endif
182 if( value_free_function != NULL )
183 {
184 if( value_free_function(
185 &( internal_element->value ),
186 error ) != 1 )
187 {
188 libcerror_error_set(
189 error,
190 LIBCERROR_ERROR_DOMAIN_RUNTIME,
191 LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
192 "%s: unable to free value.",
193 function );
194
195 result = -1;
196 }
197 }
198 memory_free(
199 internal_element );
200 }
201 return( result );
202 }
203
204 /* Retrieves the parent list from the list element
205 * Returns 1 if successful or -1 on error
206 */
libcdata_list_element_get_parent_list(libcdata_list_element_t * element,intptr_t ** parent_list,libcerror_error_t ** error)207 int libcdata_list_element_get_parent_list(
208 libcdata_list_element_t *element,
209 intptr_t **parent_list,
210 libcerror_error_t **error )
211 {
212 libcdata_internal_list_element_t *internal_element = NULL;
213 static char *function = "libcdata_list_element_get_parent_list";
214
215 if( element == NULL )
216 {
217 libcerror_error_set(
218 error,
219 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
220 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
221 "%s: invalid list element.",
222 function );
223
224 return( -1 );
225 }
226 internal_element = (libcdata_internal_list_element_t *) element;
227
228 if( parent_list == NULL )
229 {
230 libcerror_error_set(
231 error,
232 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
233 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
234 "%s: invalid parent list.",
235 function );
236
237 return( -1 );
238 }
239 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
240 if( libcthreads_read_write_lock_grab_for_read(
241 internal_element->read_write_lock,
242 error ) != 1 )
243 {
244 libcerror_error_set(
245 error,
246 LIBCERROR_ERROR_DOMAIN_RUNTIME,
247 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
248 "%s: unable to grab read/write lock for reading.",
249 function );
250
251 return( -1 );
252 }
253 #endif
254 *parent_list = internal_element->parent_list;
255
256 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
257 if( libcthreads_read_write_lock_release_for_read(
258 internal_element->read_write_lock,
259 error ) != 1 )
260 {
261 libcerror_error_set(
262 error,
263 LIBCERROR_ERROR_DOMAIN_RUNTIME,
264 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
265 "%s: unable to release read/write lock for reading.",
266 function );
267
268 return( -1 );
269 }
270 #endif
271 return( 1 );
272 }
273
274 /* Sets the parent list in the list element
275 * Returns 1 if successful or -1 on error
276 */
libcdata_list_element_set_parent_list(libcdata_list_element_t * element,intptr_t * parent_list,libcerror_error_t ** error)277 int libcdata_list_element_set_parent_list(
278 libcdata_list_element_t *element,
279 intptr_t *parent_list,
280 libcerror_error_t **error )
281 {
282 libcdata_internal_list_element_t *internal_element = NULL;
283 static char *function = "libcdata_list_element_set_parent_list";
284
285 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
286 intptr_t *backup_parent_list = NULL;
287 #endif
288
289 if( element == NULL )
290 {
291 libcerror_error_set(
292 error,
293 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
294 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
295 "%s: invalid list element.",
296 function );
297
298 return( -1 );
299 }
300 internal_element = (libcdata_internal_list_element_t *) element;
301
302 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
303 if( libcthreads_read_write_lock_grab_for_write(
304 internal_element->read_write_lock,
305 error ) != 1 )
306 {
307 libcerror_error_set(
308 error,
309 LIBCERROR_ERROR_DOMAIN_RUNTIME,
310 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
311 "%s: unable to grab read/write lock for writing.",
312 function );
313
314 return( -1 );
315 }
316 backup_parent_list = internal_element->parent_list;
317 #endif
318 internal_element->parent_list = parent_list;
319
320 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
321 if( libcthreads_read_write_lock_release_for_write(
322 internal_element->read_write_lock,
323 error ) != 1 )
324 {
325 libcerror_error_set(
326 error,
327 LIBCERROR_ERROR_DOMAIN_RUNTIME,
328 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
329 "%s: unable to release read/write lock for writing.",
330 function );
331
332 goto on_error;
333 }
334 #endif
335 return( 1 );
336
337 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
338 on_error:
339 internal_element->parent_list = backup_parent_list;
340
341 return( -1 );
342 #endif
343 }
344
345 /* Retrieves the previous element from the list element
346 * Returns 1 if successful or -1 on error
347 */
libcdata_list_element_get_previous_element(libcdata_list_element_t * element,libcdata_list_element_t ** previous_element,libcerror_error_t ** error)348 int libcdata_list_element_get_previous_element(
349 libcdata_list_element_t *element,
350 libcdata_list_element_t **previous_element,
351 libcerror_error_t **error )
352 {
353 libcdata_internal_list_element_t *internal_element = NULL;
354 static char *function = "libcdata_list_element_get_previous_element";
355
356 if( element == NULL )
357 {
358 libcerror_error_set(
359 error,
360 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
361 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
362 "%s: invalid list element.",
363 function );
364
365 return( -1 );
366 }
367 internal_element = (libcdata_internal_list_element_t *) element;
368
369 if( previous_element == NULL )
370 {
371 libcerror_error_set(
372 error,
373 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
374 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
375 "%s: invalid previous element.",
376 function );
377
378 return( -1 );
379 }
380 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
381 if( libcthreads_read_write_lock_grab_for_read(
382 internal_element->read_write_lock,
383 error ) != 1 )
384 {
385 libcerror_error_set(
386 error,
387 LIBCERROR_ERROR_DOMAIN_RUNTIME,
388 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
389 "%s: unable to grab read/write lock for reading.",
390 function );
391
392 return( -1 );
393 }
394 #endif
395 *previous_element = internal_element->previous_element;
396
397 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
398 if( libcthreads_read_write_lock_release_for_read(
399 internal_element->read_write_lock,
400 error ) != 1 )
401 {
402 libcerror_error_set(
403 error,
404 LIBCERROR_ERROR_DOMAIN_RUNTIME,
405 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
406 "%s: unable to release read/write lock for reading.",
407 function );
408
409 return( -1 );
410 }
411 #endif
412 return( 1 );
413 }
414
415 /* Sets the previous element in the list element
416 * Returns 1 if successful or -1 on error
417 */
libcdata_list_element_set_previous_element(libcdata_list_element_t * element,libcdata_list_element_t * previous_element,libcerror_error_t ** error)418 int libcdata_list_element_set_previous_element(
419 libcdata_list_element_t *element,
420 libcdata_list_element_t *previous_element,
421 libcerror_error_t **error )
422 {
423 libcdata_internal_list_element_t *internal_element = NULL;
424 static char *function = "libcdata_list_element_set_previous_element";
425
426 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
427 libcdata_list_element_t *backup_previous_element = NULL;
428 #endif
429
430 if( element == NULL )
431 {
432 libcerror_error_set(
433 error,
434 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
435 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
436 "%s: invalid list element.",
437 function );
438
439 return( -1 );
440 }
441 internal_element = (libcdata_internal_list_element_t *) element;
442
443 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
444 if( libcthreads_read_write_lock_grab_for_write(
445 internal_element->read_write_lock,
446 error ) != 1 )
447 {
448 libcerror_error_set(
449 error,
450 LIBCERROR_ERROR_DOMAIN_RUNTIME,
451 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
452 "%s: unable to grab read/write lock for writing.",
453 function );
454
455 return( -1 );
456 }
457 backup_previous_element = internal_element->previous_element;
458 #endif
459 internal_element->previous_element = previous_element;
460
461 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
462 if( libcthreads_read_write_lock_release_for_write(
463 internal_element->read_write_lock,
464 error ) != 1 )
465 {
466 libcerror_error_set(
467 error,
468 LIBCERROR_ERROR_DOMAIN_RUNTIME,
469 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
470 "%s: unable to release read/write lock for writing.",
471 function );
472
473 goto on_error;
474 }
475 #endif
476 return( 1 );
477
478 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
479 on_error:
480 internal_element->previous_element = backup_previous_element;
481
482 return( -1 );
483 #endif
484 }
485
486 /* Retrieves the next element from the list element
487 * Returns 1 if successful or -1 on error
488 */
libcdata_list_element_get_next_element(libcdata_list_element_t * element,libcdata_list_element_t ** next_element,libcerror_error_t ** error)489 int libcdata_list_element_get_next_element(
490 libcdata_list_element_t *element,
491 libcdata_list_element_t **next_element,
492 libcerror_error_t **error )
493 {
494 libcdata_internal_list_element_t *internal_element = NULL;
495 static char *function = "libcdata_list_element_get_next_element";
496
497 if( element == NULL )
498 {
499 libcerror_error_set(
500 error,
501 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
502 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
503 "%s: invalid list element.",
504 function );
505
506 return( -1 );
507 }
508 internal_element = (libcdata_internal_list_element_t *) element;
509
510 if( next_element == NULL )
511 {
512 libcerror_error_set(
513 error,
514 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
515 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
516 "%s: invalid next element.",
517 function );
518
519 return( -1 );
520 }
521 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
522 if( libcthreads_read_write_lock_grab_for_read(
523 internal_element->read_write_lock,
524 error ) != 1 )
525 {
526 libcerror_error_set(
527 error,
528 LIBCERROR_ERROR_DOMAIN_RUNTIME,
529 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
530 "%s: unable to grab read/write lock for reading.",
531 function );
532
533 return( -1 );
534 }
535 #endif
536 *next_element = internal_element->next_element;
537
538 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
539 if( libcthreads_read_write_lock_release_for_read(
540 internal_element->read_write_lock,
541 error ) != 1 )
542 {
543 libcerror_error_set(
544 error,
545 LIBCERROR_ERROR_DOMAIN_RUNTIME,
546 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
547 "%s: unable to release read/write lock for reading.",
548 function );
549
550 return( -1 );
551 }
552 #endif
553 return( 1 );
554 }
555
556 /* Sets the next element in the list element
557 * Returns 1 if successful or -1 on error
558 */
libcdata_list_element_set_next_element(libcdata_list_element_t * element,libcdata_list_element_t * next_element,libcerror_error_t ** error)559 int libcdata_list_element_set_next_element(
560 libcdata_list_element_t *element,
561 libcdata_list_element_t *next_element,
562 libcerror_error_t **error )
563 {
564 libcdata_internal_list_element_t *internal_element = NULL;
565 static char *function = "libcdata_list_element_set_next_element";
566
567 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
568 libcdata_list_element_t *backup_next_element = NULL;
569 #endif
570
571 if( element == NULL )
572 {
573 libcerror_error_set(
574 error,
575 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
576 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
577 "%s: invalid list element.",
578 function );
579
580 return( -1 );
581 }
582 internal_element = (libcdata_internal_list_element_t *) element;
583
584 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
585 if( libcthreads_read_write_lock_grab_for_write(
586 internal_element->read_write_lock,
587 error ) != 1 )
588 {
589 libcerror_error_set(
590 error,
591 LIBCERROR_ERROR_DOMAIN_RUNTIME,
592 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
593 "%s: unable to grab read/write lock for writing.",
594 function );
595
596 return( -1 );
597 }
598 backup_next_element = internal_element->next_element;
599 #endif
600 internal_element->next_element = next_element;
601
602 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
603 if( libcthreads_read_write_lock_release_for_write(
604 internal_element->read_write_lock,
605 error ) != 1 )
606 {
607 libcerror_error_set(
608 error,
609 LIBCERROR_ERROR_DOMAIN_RUNTIME,
610 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
611 "%s: unable to release read/write lock for writing.",
612 function );
613
614 goto on_error;
615 }
616 #endif
617 return( 1 );
618
619 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
620 on_error:
621 internal_element->next_element = backup_next_element;
622
623 return( -1 );
624 #endif
625 }
626
627 /* Retrieves the previous and next element from the list element
628 * Returns 1 if successful or -1 on error
629 */
libcdata_list_element_get_elements(libcdata_list_element_t * element,libcdata_list_element_t ** previous_element,libcdata_list_element_t ** next_element,libcerror_error_t ** error)630 int libcdata_list_element_get_elements(
631 libcdata_list_element_t *element,
632 libcdata_list_element_t **previous_element,
633 libcdata_list_element_t **next_element,
634 libcerror_error_t **error )
635 {
636 libcdata_internal_list_element_t *internal_element = NULL;
637 static char *function = "libcdata_list_element_get_elements";
638
639 if( element == NULL )
640 {
641 libcerror_error_set(
642 error,
643 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
644 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
645 "%s: invalid list element.",
646 function );
647
648 return( -1 );
649 }
650 internal_element = (libcdata_internal_list_element_t *) element;
651
652 if( previous_element == NULL )
653 {
654 libcerror_error_set(
655 error,
656 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
657 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
658 "%s: invalid previous element.",
659 function );
660
661 return( -1 );
662 }
663 if( next_element == NULL )
664 {
665 libcerror_error_set(
666 error,
667 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
668 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
669 "%s: invalid next element.",
670 function );
671
672 return( -1 );
673 }
674 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
675 if( libcthreads_read_write_lock_grab_for_read(
676 internal_element->read_write_lock,
677 error ) != 1 )
678 {
679 libcerror_error_set(
680 error,
681 LIBCERROR_ERROR_DOMAIN_RUNTIME,
682 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
683 "%s: unable to grab read/write lock for reading.",
684 function );
685
686 return( -1 );
687 }
688 #endif
689 *previous_element = internal_element->previous_element;
690 *next_element = internal_element->next_element;
691
692 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
693 if( libcthreads_read_write_lock_release_for_read(
694 internal_element->read_write_lock,
695 error ) != 1 )
696 {
697 libcerror_error_set(
698 error,
699 LIBCERROR_ERROR_DOMAIN_RUNTIME,
700 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
701 "%s: unable to release read/write lock for reading.",
702 function );
703
704 return( -1 );
705 }
706 #endif
707 return( 1 );
708 }
709
710 /* Sets the previous and next element in the list element
711 * Returns 1 if successful or -1 on error
712 */
libcdata_list_element_set_elements(libcdata_list_element_t * element,libcdata_list_element_t * previous_element,libcdata_list_element_t * next_element,libcerror_error_t ** error)713 int libcdata_list_element_set_elements(
714 libcdata_list_element_t *element,
715 libcdata_list_element_t *previous_element,
716 libcdata_list_element_t *next_element,
717 libcerror_error_t **error )
718 {
719 libcdata_internal_list_element_t *internal_element = NULL;
720 static char *function = "libcdata_list_element_set_elements";
721
722 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
723 libcdata_list_element_t *backup_next_element = NULL;
724 libcdata_list_element_t *backup_previous_element = NULL;
725 #endif
726
727 if( element == NULL )
728 {
729 libcerror_error_set(
730 error,
731 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
732 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
733 "%s: invalid list element.",
734 function );
735
736 return( -1 );
737 }
738 internal_element = (libcdata_internal_list_element_t *) element;
739
740 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
741 if( libcthreads_read_write_lock_grab_for_write(
742 internal_element->read_write_lock,
743 error ) != 1 )
744 {
745 libcerror_error_set(
746 error,
747 LIBCERROR_ERROR_DOMAIN_RUNTIME,
748 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
749 "%s: unable to grab read/write lock for writing.",
750 function );
751
752 return( -1 );
753 }
754 backup_previous_element = internal_element->previous_element;
755 backup_next_element = internal_element->next_element;
756 #endif
757 internal_element->previous_element = previous_element;
758 internal_element->next_element = next_element;
759
760 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
761 if( libcthreads_read_write_lock_release_for_write(
762 internal_element->read_write_lock,
763 error ) != 1 )
764 {
765 libcerror_error_set(
766 error,
767 LIBCERROR_ERROR_DOMAIN_RUNTIME,
768 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
769 "%s: unable to release read/write lock for writing.",
770 function );
771
772 goto on_error;
773 }
774 #endif
775 return( 1 );
776
777 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
778 on_error:
779 internal_element->previous_element = backup_previous_element;
780 internal_element->next_element = backup_next_element;
781
782 return( -1 );
783 #endif
784 }
785
786 /* Retrieves the value from the list element
787 * Returns 1 if successful or -1 on error
788 */
libcdata_list_element_get_value(libcdata_list_element_t * element,intptr_t ** value,libcerror_error_t ** error)789 int libcdata_list_element_get_value(
790 libcdata_list_element_t *element,
791 intptr_t **value,
792 libcerror_error_t **error )
793 {
794 libcdata_internal_list_element_t *internal_element = NULL;
795 static char *function = "libcdata_list_element_get_value";
796
797 if( element == NULL )
798 {
799 libcerror_error_set(
800 error,
801 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
802 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
803 "%s: invalid list element.",
804 function );
805
806 return( -1 );
807 }
808 internal_element = (libcdata_internal_list_element_t *) element;
809
810 if( value == NULL )
811 {
812 libcerror_error_set(
813 error,
814 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
815 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
816 "%s: invalid value.",
817 function );
818
819 return( -1 );
820 }
821 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
822 if( libcthreads_read_write_lock_grab_for_read(
823 internal_element->read_write_lock,
824 error ) != 1 )
825 {
826 libcerror_error_set(
827 error,
828 LIBCERROR_ERROR_DOMAIN_RUNTIME,
829 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
830 "%s: unable to grab read/write lock for reading.",
831 function );
832
833 return( -1 );
834 }
835 #endif
836 *value = internal_element->value;
837
838 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
839 if( libcthreads_read_write_lock_release_for_read(
840 internal_element->read_write_lock,
841 error ) != 1 )
842 {
843 libcerror_error_set(
844 error,
845 LIBCERROR_ERROR_DOMAIN_RUNTIME,
846 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
847 "%s: unable to release read/write lock for reading.",
848 function );
849
850 return( -1 );
851 }
852 #endif
853 return( 1 );
854 }
855
856 /* Sets the value in the list element
857 * Returns 1 if successful or -1 on error
858 */
libcdata_list_element_set_value(libcdata_list_element_t * element,intptr_t * value,libcerror_error_t ** error)859 int libcdata_list_element_set_value(
860 libcdata_list_element_t *element,
861 intptr_t *value,
862 libcerror_error_t **error )
863 {
864 libcdata_internal_list_element_t *internal_element = NULL;
865 static char *function = "libcdata_list_element_set_value";
866
867 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
868 intptr_t *backup_value = NULL;
869 #endif
870
871 if( element == NULL )
872 {
873 libcerror_error_set(
874 error,
875 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
876 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
877 "%s: invalid list element.",
878 function );
879
880 return( -1 );
881 }
882 internal_element = (libcdata_internal_list_element_t *) element;
883
884 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
885 if( libcthreads_read_write_lock_grab_for_write(
886 internal_element->read_write_lock,
887 error ) != 1 )
888 {
889 libcerror_error_set(
890 error,
891 LIBCERROR_ERROR_DOMAIN_RUNTIME,
892 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
893 "%s: unable to grab read/write lock for writing.",
894 function );
895
896 return( -1 );
897 }
898 backup_value = internal_element->value;
899 #endif
900 internal_element->value = value;
901
902 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
903 if( libcthreads_read_write_lock_release_for_write(
904 internal_element->read_write_lock,
905 error ) != 1 )
906 {
907 libcerror_error_set(
908 error,
909 LIBCERROR_ERROR_DOMAIN_RUNTIME,
910 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
911 "%s: unable to release read/write lock for writing.",
912 function );
913
914 goto on_error;
915 }
916 #endif
917 return( 1 );
918
919 #if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBCDATA )
920 on_error:
921 internal_element->value = backup_value;
922
923 return( -1 );
924 #endif
925 }
926
927