1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
|
/*
* $Header$
*
* Copyright 2006, 2007 Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include "ccs_list_internal.h"
#include "cci_array_internal.h"
#include "cci_identifier.h"
#include "ccs_server.h"
typedef enum {
ccs_list_action_insert,
ccs_list_action_remove,
ccs_list_action_push_front
} ccs_list_action_enum;
/* ------------------------------------------------------------------------ */
struct ccs_list_d {
cci_array_t objects;
cci_array_t iterators;
cc_int32 object_not_found_err;
cc_int32 iterator_not_found_err;
ccs_object_compare_identifier_t object_compare_identifier;
};
struct ccs_list_d ccs_list_initializer = { NULL, NULL, -1, -1, NULL };
/* ------------------------------------------------------------------------ */
struct ccs_list_iterator_d {
cci_identifier_t identifier;
ccs_pipe_t client_pipe;
ccs_list_t list;
cc_uint64 current;
};
struct ccs_list_iterator_d ccs_list_iterator_initializer = { NULL, CCS_PIPE_NULL, NULL, 0 };
static cc_int32 ccs_list_iterator_new (ccs_list_iterator_t *out_list_iterator,
ccs_list_t in_list,
ccs_pipe_t in_client_pipe);
static cc_int32 ccs_list_iterator_object_release (cci_array_object_t io_list_iterator);
static cc_int32 ccs_list_iterator_update (ccs_list_iterator_t io_list_iterator,
ccs_list_action_enum in_action,
cc_uint64 in_object_index);
#ifdef TARGET_OS_MAC
#pragma mark -
#endif
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_new (ccs_list_t *out_list,
cc_int32 in_object_not_found_err,
cc_int32 in_iterator_not_found_err,
ccs_object_compare_identifier_t in_object_compare_identifier,
ccs_object_release_t in_object_release)
{
cc_int32 err = ccNoError;
ccs_list_t list = NULL;
if (!out_list) { err = cci_check_error (ccErrBadParam); }
if (!err) {
list = malloc (sizeof (*list));
if (list) {
*list = ccs_list_initializer;
list->object_not_found_err = in_object_not_found_err;
list->iterator_not_found_err = in_iterator_not_found_err;
list->object_compare_identifier = in_object_compare_identifier;
} else {
err = cci_check_error (ccErrNoMem);
}
}
if (!err) {
err = cci_array_new (&list->objects, in_object_release);
}
if (!err) {
err = cci_array_new (&list->iterators, ccs_list_iterator_object_release);
}
if (!err) {
*out_list = list;
list = NULL;
}
ccs_list_release (list);
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_release (ccs_list_t io_list)
{
cc_int32 err = ccNoError;
if (!err && io_list) {
cc_uint64 i;
for (i = 0; i < cci_array_count (io_list->iterators); i++) {
ccs_list_iterator_release ((ccs_list_iterator_t) cci_array_object_at_index (io_list->iterators, i));
}
free (io_list->iterators);
cci_array_release (io_list->objects);
free (io_list);
}
return err;
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_new_iterator (ccs_list_t io_list,
ccs_pipe_t in_client_pipe,
ccs_list_iterator_t *out_list_iterator)
{
return cci_check_error (ccs_list_iterator_new (out_list_iterator,
io_list,
in_client_pipe));
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_release_iterator (ccs_list_t io_list,
cci_identifier_t in_identifier)
{
cc_int32 err = ccNoError;
ccs_list_iterator_t iterator = NULL;
if (!io_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_identifier) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = ccs_list_find_iterator (io_list, in_identifier, &iterator);
}
if (!err) {
err = ccs_list_iterator_release (iterator);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_count (ccs_list_t in_list,
cc_uint64 *out_count)
{
cc_int32 err = ccNoError;
if (!in_list ) { err = cci_check_error (ccErrBadParam); }
if (!out_count) { err = cci_check_error (ccErrBadParam); }
if (!err) {
*out_count = cci_array_count (in_list->objects);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
static ccs_list_iterator_t ccs_list_iterator_at_index (ccs_list_t in_list,
cc_uint64 in_index)
{
return (ccs_list_iterator_t) cci_array_object_at_index (in_list->iterators, in_index);
}
/* ------------------------------------------------------------------------ */
static cc_int32 ccs_list_find_index (ccs_list_t in_list,
cci_identifier_t in_identifier,
cc_uint64 *out_object_index)
{
cc_int32 err = ccNoError;
cc_int32 found = 0;
if (!in_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_identifier ) { err = cci_check_error (ccErrBadParam); }
if (!out_object_index) { err = cci_check_error (ccErrBadParam); }
if (!err && !found) {
cc_uint64 i;
for (i = 0; !err && i < cci_array_count (in_list->objects); i++) {
cc_uint32 equal = 0;
cci_array_object_t object = cci_array_object_at_index (in_list->objects, i);
err = in_list->object_compare_identifier (object, in_identifier, &equal);
if (!err && equal) {
found = 1;
*out_object_index = i;
}
}
}
if (!err && !found) {
err = cci_check_error (in_list->object_not_found_err);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_find (ccs_list_t in_list,
cci_identifier_t in_identifier,
ccs_list_object_t *out_object)
{
cc_int32 err = ccNoError;
cc_uint64 i;
if (!in_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_identifier) { err = cci_check_error (ccErrBadParam); }
if (!out_object ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = ccs_list_find_index (in_list, in_identifier, &i);
}
if (!err) {
*out_object = cci_array_object_at_index (in_list->objects, i);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
static cc_int32 ccs_list_find_iterator_index (ccs_list_t in_list,
cci_identifier_t in_identifier,
cc_uint64 *out_object_index)
{
cc_int32 err = ccNoError;
cc_int32 found = 0;
if (!in_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_identifier ) { err = cci_check_error (ccErrBadParam); }
if (!out_object_index) { err = cci_check_error (ccErrBadParam); }
if (!err && !found) {
cc_uint64 i;
for (i = 0; !err && i < cci_array_count (in_list->iterators); i++) {
cc_uint32 equal = 0;
ccs_list_iterator_t iterator = ccs_list_iterator_at_index (in_list, i);
err = cci_identifier_compare (iterator->identifier, in_identifier, &equal);
if (!err && equal) {
found = 1;
*out_object_index = i;
}
}
}
if (!err && !found) {
err = cci_check_error (in_list->object_not_found_err);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_find_iterator (ccs_list_t in_list,
cci_identifier_t in_identifier,
ccs_list_iterator_t *out_list_iterator)
{
cc_int32 err = ccNoError;
cc_uint64 i;
if (!in_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_identifier ) { err = cci_check_error (ccErrBadParam); }
if (!out_list_iterator) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = ccs_list_find_iterator_index (in_list, in_identifier, &i);
}
if (!err) {
*out_list_iterator = ccs_list_iterator_at_index (in_list, i);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_add (ccs_list_t io_list,
ccs_list_object_t in_object)
{
cc_int32 err = ccNoError;
cc_uint64 add_index;
if (!io_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_object) { err = cci_check_error (ccErrBadParam); }
if (!err) {
add_index = cci_array_count (io_list->objects);
err = cci_array_insert (io_list->objects, in_object, add_index);
}
if (!err) {
/* Fixup iterator indexes */
cc_uint64 i;
for (i = 0; !err && i < cci_array_count (io_list->iterators); i++) {
ccs_list_iterator_t iterator = ccs_list_iterator_at_index (io_list, i);
err = ccs_list_iterator_update (iterator, ccs_list_action_insert, add_index);
}
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_remove (ccs_list_t io_list,
cci_identifier_t in_identifier)
{
cc_int32 err = ccNoError;
cc_uint64 remove_index;
if (!io_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_identifier) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = ccs_list_find_index (io_list, in_identifier, &remove_index);
}
if (!err) {
err = cci_array_remove (io_list->objects, remove_index);
}
if (!err) {
/* Fixup iterator indexes */
cc_uint64 i;
for (i = 0; !err && i < cci_array_count (io_list->iterators); i++) {
ccs_list_iterator_t iterator = ccs_list_iterator_at_index (io_list, i);
err = ccs_list_iterator_update (iterator, ccs_list_action_remove, remove_index);
}
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_push_front (ccs_list_t io_list,
cci_identifier_t in_identifier)
{
cc_int32 err = ccNoError;
cc_uint64 push_front_index;
if (!io_list ) { err = cci_check_error (ccErrBadParam); }
if (!in_identifier) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = ccs_list_find_index (io_list, in_identifier, &push_front_index);
}
if (!err) {
err = cci_array_push_front (io_list->objects, push_front_index);
}
if (!err) {
/* Fixup iterator indexes */
cc_uint64 i;
for (i = 0; !err && i < cci_array_count (io_list->iterators); i++) {
ccs_list_iterator_t iterator = ccs_list_iterator_at_index (io_list, i);
err = ccs_list_iterator_update (iterator,
ccs_list_action_push_front,
push_front_index);
}
}
return cci_check_error (err);
}
#ifdef TARGET_OS_MAC
#pragma mark -
#endif
/* ------------------------------------------------------------------------ */
static cc_int32 ccs_list_iterator_new (ccs_list_iterator_t *out_list_iterator,
ccs_list_t io_list,
ccs_pipe_t in_client_pipe)
{
cc_int32 err = ccNoError;
ccs_list_iterator_t list_iterator = NULL;
if (!out_list_iterator) { err = cci_check_error (ccErrBadParam); }
if (!io_list ) { err = cci_check_error (ccErrBadParam); }
/* client_pipe may be NULL if the iterator exists for internal server use */
if (!err) {
list_iterator = malloc (sizeof (*list_iterator));
if (list_iterator) {
*list_iterator = ccs_list_iterator_initializer;
} else {
err = cci_check_error (ccErrNoMem);
}
}
if (!err) {
err = ccs_server_new_identifier (&list_iterator->identifier);
}
if (!err) {
list_iterator->list = io_list;
list_iterator->current = 0;
err = cci_array_insert (io_list->iterators,
(cci_array_object_t) list_iterator,
cci_array_count (io_list->iterators));
}
if (!err && ccs_pipe_valid (in_client_pipe)) {
ccs_client_t client = NULL;
err = ccs_pipe_copy (&list_iterator->client_pipe, in_client_pipe);
if (!err) {
err = ccs_server_client_for_pipe (in_client_pipe, &client);
}
if (!err) {
err = ccs_client_add_iterator (client, list_iterator);
}
}
if (!err) {
*out_list_iterator = list_iterator;
list_iterator = NULL;
}
ccs_list_iterator_release (list_iterator);
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_iterator_write (ccs_list_iterator_t in_list_iterator,
cci_stream_t in_stream)
{
cc_int32 err = ccNoError;
if (!in_list_iterator) { err = cci_check_error (ccErrBadParam); }
if (!in_stream ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_identifier_write (in_list_iterator->identifier,
in_stream);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_iterator_clone (ccs_list_iterator_t in_list_iterator,
ccs_list_iterator_t *out_list_iterator)
{
cc_int32 err = ccNoError;
ccs_list_iterator_t list_iterator = NULL;
if (!in_list_iterator ) { err = cci_check_error (ccErrBadParam); }
if (!out_list_iterator) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = ccs_list_iterator_new (&list_iterator,
in_list_iterator->list,
in_list_iterator->client_pipe);
}
if (!err) {
list_iterator->current = in_list_iterator->current;
*out_list_iterator = list_iterator;
list_iterator = NULL;
}
ccs_list_iterator_release (list_iterator);
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
static cc_int32 ccs_list_iterator_object_release (cci_array_object_t io_list_iterator)
{
cc_int32 err = ccNoError;
ccs_list_iterator_t list_iterator = (ccs_list_iterator_t) io_list_iterator;
if (!io_list_iterator) { err = ccErrBadParam; }
if (!err && ccs_pipe_valid (list_iterator->client_pipe)) {
ccs_client_t client = NULL;
err = ccs_server_client_for_pipe (list_iterator->client_pipe, &client);
if (!err && client) {
/* if client object still has a reference to us, remove it */
err = ccs_client_remove_iterator (client, list_iterator);
}
}
if (!err) {
ccs_pipe_release (list_iterator->client_pipe);
cci_identifier_release (list_iterator->identifier);
free (io_list_iterator);
}
return err;
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_iterator_release (ccs_list_iterator_t io_list_iterator)
{
cc_int32 err = ccNoError;
if (!err && io_list_iterator) {
cc_uint64 i = 0;
if (ccs_list_find_iterator_index (io_list_iterator->list,
io_list_iterator->identifier,
&i) == ccNoError) {
/* cci_array_remove will call ccs_list_iterator_object_release */
cci_array_remove (io_list_iterator->list->iterators, i);
} else {
cci_debug_printf ("Warning: iterator not in iterator list!");
}
}
return err;
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_iterator_invalidate (ccs_list_iterator_t io_list_iterator)
{
cc_int32 err = ccNoError;
ccs_list_iterator_t list_iterator = (ccs_list_iterator_t) io_list_iterator;
if (!io_list_iterator) { err = ccErrBadParam; }
if (!err) {
/* Client owner died. Remove client reference and then the iterator. */
if (ccs_pipe_valid (list_iterator->client_pipe)) {
ccs_pipe_release (list_iterator->client_pipe);
list_iterator->client_pipe = CCS_PIPE_NULL;
}
err = ccs_list_iterator_release (io_list_iterator);
}
return err;
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_iterator_current (ccs_list_iterator_t io_list_iterator,
ccs_list_object_t *out_object)
{
cc_int32 err = ccNoError;
if (!io_list_iterator) { err = cci_check_error (ccErrBadParam); }
if (!out_object ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
if (io_list_iterator->current < cci_array_count (io_list_iterator->list->objects)) {
*out_object = cci_array_object_at_index (io_list_iterator->list->objects,
io_list_iterator->current);
} else {
err = ccIteratorEnd;
}
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_list_iterator_next (ccs_list_iterator_t io_list_iterator,
ccs_list_object_t *out_object)
{
cc_int32 err = ccNoError;
if (!io_list_iterator) { err = cci_check_error (ccErrBadParam); }
if (!out_object ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
if (io_list_iterator->current < cci_array_count (io_list_iterator->list->objects)) {
*out_object = cci_array_object_at_index (io_list_iterator->list->objects,
io_list_iterator->current);
io_list_iterator->current++;
} else {
err = ccIteratorEnd;
}
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
static cc_int32 ccs_list_iterator_update (ccs_list_iterator_t io_list_iterator,
ccs_list_action_enum in_action,
cc_uint64 in_object_index)
{
cc_int32 err = ccNoError;
if (!io_list_iterator) { err = cci_check_error (ccErrBadParam); }
if (!err) {
/* When the list changes adjust the current index so that */
/* we don't unnecessarily skip or double count items */
if (in_action == ccs_list_action_insert) {
if (io_list_iterator->current > in_object_index) {
io_list_iterator->current++;
}
} else if (in_action == ccs_list_action_remove) {
if (io_list_iterator->current >= in_object_index) {
io_list_iterator->current--;
}
} else if (in_action == ccs_list_action_push_front) {
if (io_list_iterator->current < in_object_index) {
io_list_iterator->current++;
}
} else {
err = cci_check_error (ccErrBadParam);
}
}
return cci_check_error (err);
}
|