| 14 |
* * |
* * |
| 15 |
***************************************************************************/ |
***************************************************************************/ |
| 16 |
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|
| 17 |
|
#define _GNU_SOURCE |
| 18 |
|
|
| 19 |
#include "section_list.h" |
#include "section_list.h" |
| 20 |
#include "log.h" |
#include "log.h" |
| 21 |
#include "trie_dict.h" |
#include "trie_dict.h" |
| 26 |
#include <stdlib.h> |
#include <stdlib.h> |
| 27 |
#include <errno.h> |
#include <errno.h> |
| 28 |
#include <sys/param.h> |
#include <sys/param.h> |
| 29 |
|
#include <sys/sem.h> |
| 30 |
#include <sys/shm.h> |
#include <sys/shm.h> |
| 31 |
#include <sys/ipc.h> |
#include <sys/ipc.h> |
| 32 |
|
|
| 34 |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 256 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 256 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
| 35 |
#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
| 36 |
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|
| 37 |
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#define CALCULATE_PAGE_THRESHOLD 100 // Adjust to tune performance of move topic |
| 38 |
|
|
| 39 |
|
#define SID_STR_LEN 5 // 32-bit + NULL |
| 40 |
|
|
| 41 |
struct article_block_t |
struct article_block_t |
| 42 |
{ |
{ |
| 43 |
ARTICLE articles[ARTICLE_PER_BLOCK]; |
ARTICLE articles[ARTICLE_PER_BLOCK]; |
| 65 |
|
|
| 66 |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
| 67 |
|
|
| 68 |
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static int section_list_pool_shmid; |
| 69 |
|
static int section_list_pool_semid; |
| 70 |
static SECTION_LIST *p_section_list_pool = NULL; |
static SECTION_LIST *p_section_list_pool = NULL; |
| 71 |
static int section_list_count = 0; |
static int section_list_count = 0; |
| 72 |
static TRIE_NODE *p_trie_dict_section_list = NULL; |
static TRIE_NODE *p_trie_dict_section_by_name = NULL; |
| 73 |
|
static TRIE_NODE *p_trie_dict_section_by_sid = NULL; |
| 74 |
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|
| 75 |
int article_block_init(const char *filename, int block_count) |
int article_block_init(const char *filename, int block_count) |
| 76 |
{ |
{ |
| 304 |
|
|
| 305 |
if (index < 0 || index / ARTICLE_PER_BLOCK >= p_article_block_pool->block_count) |
if (index < 0 || index / ARTICLE_PER_BLOCK >= p_article_block_pool->block_count) |
| 306 |
{ |
{ |
| 307 |
log_error("section_data_find_article_by_index(%d) is out of boundary of block [0, %d)\n", index, p_article_block_pool->block_count); |
log_error("article_block_find_by_index(%d) is out of boundary of block [0, %d)\n", index, p_article_block_pool->block_count); |
| 308 |
return NULL; |
return NULL; |
| 309 |
} |
} |
| 310 |
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|
| 312 |
|
|
| 313 |
if (index % ARTICLE_PER_BLOCK >= p_block->article_count) |
if (index % ARTICLE_PER_BLOCK >= p_block->article_count) |
| 314 |
{ |
{ |
| 315 |
log_error("section_data_find_article_by_index(%d) is out of boundary of article [0, %d)\n", index, p_block->article_count); |
log_error("article_block_find_by_index(%d) is out of boundary of article [0, %d)\n", index, p_block->article_count); |
| 316 |
return NULL; |
return NULL; |
| 317 |
} |
} |
| 318 |
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|
| 319 |
return (p_block->articles + (index % ARTICLE_PER_BLOCK)); |
return (p_block->articles + (index % ARTICLE_PER_BLOCK)); |
| 320 |
} |
} |
| 321 |
|
|
| 322 |
SECTION_LIST *section_list_create(const char *sname, const char *stitle, const char *master_name) |
extern int section_list_pool_init(const char *filename) |
| 323 |
{ |
{ |
| 324 |
SECTION_LIST *p_section; |
int semid; |
| 325 |
|
int shmid; |
| 326 |
|
int proj_id; |
| 327 |
|
key_t key; |
| 328 |
|
size_t size; |
| 329 |
|
void *p_shm; |
| 330 |
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|
| 331 |
|
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL || p_trie_dict_section_by_sid == NULL) |
| 332 |
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{ |
| 333 |
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section_list_pool_cleanup(); |
| 334 |
|
} |
| 335 |
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|
| 336 |
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p_section_list_pool = calloc(BBS_max_section, sizeof(SECTION_LIST)); |
| 337 |
if (p_section_list_pool == NULL) |
if (p_section_list_pool == NULL) |
| 338 |
{ |
{ |
| 339 |
p_section_list_pool = calloc(BBS_max_section, sizeof(SECTION_LIST)); |
log_error("calloc(%d SECTION_LIST) OOM\n", BBS_max_section); |
| 340 |
if (p_section_list_pool == NULL) |
return -1; |
| 341 |
{ |
} |
|
log_error("calloc(%d SECTION_LIST) OOM\n", BBS_max_section); |
|
|
return NULL; |
|
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} |
|
| 342 |
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|
| 343 |
section_list_count = 0; |
proj_id = (int)(time(NULL) % getpid()); |
| 344 |
|
key = ftok(filename, proj_id); |
| 345 |
|
if (key == -1) |
| 346 |
|
{ |
| 347 |
|
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
| 348 |
|
return -3; |
| 349 |
} |
} |
| 350 |
|
|
| 351 |
if (p_trie_dict_section_list == NULL) |
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections |
| 352 |
|
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600); |
| 353 |
|
if (semid == -1) |
| 354 |
{ |
{ |
| 355 |
p_trie_dict_section_list = trie_dict_create(); |
log_error("semget(section_list_pool, size = %d) error (%d)\n", size, errno); |
| 356 |
if (p_trie_dict_section_list == NULL) |
return -3; |
| 357 |
{ |
} |
| 358 |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
|
| 359 |
return NULL; |
section_list_pool_semid = semid; |
| 360 |
} |
|
| 361 |
|
size = sizeof(shmid) + sizeof(SECTION_LIST) * BBS_max_section; |
| 362 |
|
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
| 363 |
|
if (shmid == -1) |
| 364 |
|
{ |
| 365 |
|
log_error("shmget(section_list_pool, size = %d) error (%d)\n", size, errno); |
| 366 |
|
return -3; |
| 367 |
|
} |
| 368 |
|
p_shm = shmat(shmid, NULL, 0); |
| 369 |
|
if (p_shm == (void *)-1) |
| 370 |
|
{ |
| 371 |
|
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
| 372 |
|
return -3; |
| 373 |
|
} |
| 374 |
|
|
| 375 |
|
section_list_pool_shmid = shmid; |
| 376 |
|
p_section_list_pool = p_shm; |
| 377 |
|
section_list_count = 0; |
| 378 |
|
|
| 379 |
|
p_trie_dict_section_by_name = trie_dict_create(); |
| 380 |
|
if (p_trie_dict_section_by_name == NULL) |
| 381 |
|
{ |
| 382 |
|
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 383 |
|
return -2; |
| 384 |
|
} |
| 385 |
|
|
| 386 |
|
p_trie_dict_section_by_sid = trie_dict_create(); |
| 387 |
|
if (p_trie_dict_section_by_sid == NULL) |
| 388 |
|
{ |
| 389 |
|
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 390 |
|
return -2; |
| 391 |
|
} |
| 392 |
|
|
| 393 |
|
return 0; |
| 394 |
|
} |
| 395 |
|
|
| 396 |
|
inline static void sid_to_str(int32_t sid, char *p_sid_str) |
| 397 |
|
{ |
| 398 |
|
uint32_t u_sid; |
| 399 |
|
int i; |
| 400 |
|
|
| 401 |
|
u_sid = (uint32_t)sid; |
| 402 |
|
for (i = 0; i < SID_STR_LEN - 1; i++) |
| 403 |
|
{ |
| 404 |
|
p_sid_str[i] = (char)(u_sid % 255 + 1); |
| 405 |
|
u_sid /= 255; |
| 406 |
|
} |
| 407 |
|
p_sid_str[i] = '\0'; |
| 408 |
|
} |
| 409 |
|
|
| 410 |
|
SECTION_LIST *section_list_create(int32_t sid, const char *sname, const char *stitle, const char *master_name) |
| 411 |
|
{ |
| 412 |
|
SECTION_LIST *p_section; |
| 413 |
|
char sid_str[SID_STR_LEN]; |
| 414 |
|
|
| 415 |
|
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL || p_trie_dict_section_by_sid == NULL) |
| 416 |
|
{ |
| 417 |
|
log_error("session_list_pool not initialized\n"); |
| 418 |
|
return NULL; |
| 419 |
} |
} |
| 420 |
|
|
| 421 |
if (section_list_count >= BBS_max_section) |
if (section_list_count >= BBS_max_section) |
| 422 |
{ |
{ |
| 423 |
log_error("section_list_count exceed limit %d\n", BBS_max_section); |
log_error("section_list_count exceed limit %d >= %d\n", section_list_count, BBS_max_section); |
| 424 |
return NULL; |
return NULL; |
| 425 |
} |
} |
| 426 |
|
|
| 427 |
|
sid_to_str(sid, sid_str); |
| 428 |
|
|
| 429 |
p_section = p_section_list_pool + section_list_count; |
p_section = p_section_list_pool + section_list_count; |
| 430 |
|
|
| 431 |
|
p_section->sid = sid; |
| 432 |
|
|
| 433 |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
| 434 |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
| 435 |
|
|
| 439 |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
| 440 |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
| 441 |
|
|
| 442 |
if (trie_dict_set(p_trie_dict_section_list, sname, section_list_count) != 1) |
if (trie_dict_set(p_trie_dict_section_by_name, sname, section_list_count) != 1) |
| 443 |
{ |
{ |
| 444 |
log_error("trie_dict_set(section_data, %s, %d) error\n", sname, section_list_count); |
log_error("trie_dict_set(section, %s, %d) error\n", sname, section_list_count); |
| 445 |
|
return NULL; |
| 446 |
|
} |
| 447 |
|
|
| 448 |
|
if (trie_dict_set(p_trie_dict_section_by_sid, sid_str, section_list_count) != 1) |
| 449 |
|
{ |
| 450 |
|
log_error("trie_dict_set(section, %d, %d) error\n", sid, section_list_count); |
| 451 |
|
log_std("Debug %x %x %x %x\n", sid_str[0], sid_str[1], sid_str[2], sid_str[3]); |
| 452 |
return NULL; |
return NULL; |
| 453 |
} |
} |
| 454 |
|
|
| 472 |
p_section->last_page_visible_article_count = 0; |
p_section->last_page_visible_article_count = 0; |
| 473 |
} |
} |
| 474 |
|
|
| 475 |
void section_list_cleanup(void) |
void section_list_pool_cleanup(void) |
| 476 |
{ |
{ |
| 477 |
if (p_trie_dict_section_list != NULL) |
if (p_trie_dict_section_by_name != NULL) |
| 478 |
{ |
{ |
| 479 |
trie_dict_destroy(p_trie_dict_section_list); |
trie_dict_destroy(p_trie_dict_section_by_name); |
| 480 |
p_trie_dict_section_list = NULL; |
p_trie_dict_section_by_name = NULL; |
| 481 |
|
} |
| 482 |
|
|
| 483 |
|
if (p_trie_dict_section_by_sid != NULL) |
| 484 |
|
{ |
| 485 |
|
trie_dict_destroy(p_trie_dict_section_by_sid); |
| 486 |
|
p_trie_dict_section_by_sid = NULL; |
| 487 |
} |
} |
| 488 |
|
|
| 489 |
if (p_section_list_pool != NULL) |
if (p_section_list_pool != NULL) |
| 490 |
{ |
{ |
| 491 |
free(p_section_list_pool); |
if (shmdt(p_section_list_pool) == -1) |
| 492 |
|
{ |
| 493 |
|
log_error("shmdt(shmid = %d) error (%d)\n", section_list_pool_shmid, errno); |
| 494 |
|
} |
| 495 |
p_section_list_pool = NULL; |
p_section_list_pool = NULL; |
| 496 |
|
|
| 497 |
|
if (shmctl(section_list_pool_shmid, IPC_RMID, NULL) == -1) |
| 498 |
|
{ |
| 499 |
|
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", section_list_pool_shmid, errno); |
| 500 |
|
} |
| 501 |
|
|
| 502 |
|
if (semctl(section_list_pool_semid, 0, IPC_RMID) == -1) |
| 503 |
|
{ |
| 504 |
|
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", section_list_pool_semid, errno); |
| 505 |
|
} |
| 506 |
} |
} |
| 507 |
|
|
| 508 |
section_list_count = 0; |
section_list_count = 0; |
| 512 |
{ |
{ |
| 513 |
int64_t index; |
int64_t index; |
| 514 |
|
|
| 515 |
if (p_section_list_pool == NULL || p_trie_dict_section_list == NULL) |
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL) |
| 516 |
{ |
{ |
| 517 |
log_error("section_list not initialized\n"); |
log_error("section_list not initialized\n"); |
| 518 |
return NULL; |
return NULL; |
| 519 |
} |
} |
| 520 |
|
|
| 521 |
if (trie_dict_get(p_trie_dict_section_list, sname, &index) != 1) |
if (trie_dict_get(p_trie_dict_section_by_name, sname, &index) != 1) |
| 522 |
{ |
{ |
| 523 |
log_error("trie_dict_get(section_data, %s) error\n", sname); |
log_error("trie_dict_get(section, %s) error\n", sname); |
| 524 |
|
return NULL; |
| 525 |
|
} |
| 526 |
|
|
| 527 |
|
return (p_section_list_pool + index); |
| 528 |
|
} |
| 529 |
|
|
| 530 |
|
SECTION_LIST *section_list_find_by_sid(int32_t sid) |
| 531 |
|
{ |
| 532 |
|
int64_t index; |
| 533 |
|
char sid_str[SID_STR_LEN]; |
| 534 |
|
|
| 535 |
|
if (p_section_list_pool == NULL || p_trie_dict_section_by_sid == NULL) |
| 536 |
|
{ |
| 537 |
|
log_error("section_list not initialized\n"); |
| 538 |
|
return NULL; |
| 539 |
|
} |
| 540 |
|
|
| 541 |
|
sid_to_str(sid, sid_str); |
| 542 |
|
|
| 543 |
|
if (trie_dict_get(p_trie_dict_section_by_sid, sid_str, &index) != 1) |
| 544 |
|
{ |
| 545 |
|
log_error("trie_dict_get(section, %d) error\n", sid); |
| 546 |
return NULL; |
return NULL; |
| 547 |
} |
} |
| 548 |
|
|
| 569 |
return -1; |
return -1; |
| 570 |
} |
} |
| 571 |
|
|
| 572 |
|
if (p_section->sid != p_article_src->sid) |
| 573 |
|
{ |
| 574 |
|
log_error("section_list_append_article() error: section sid %d != article sid %d\n", p_section->sid, p_article_src->sid); |
| 575 |
|
return -2; |
| 576 |
|
} |
| 577 |
|
|
| 578 |
|
if (p_section->article_count >= BBS_article_limit_per_section) |
| 579 |
|
{ |
| 580 |
|
log_error("section_list_append_article() error: article_count reach limit in section %d\n", p_section->sid); |
| 581 |
|
return -2; |
| 582 |
|
} |
| 583 |
|
|
| 584 |
if (p_article_block_pool->block_count == 0 || |
if (p_article_block_pool->block_count == 0 || |
| 585 |
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count >= ARTICLE_PER_BLOCK) |
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count >= ARTICLE_PER_BLOCK) |
| 586 |
{ |
{ |
| 607 |
// AID of articles should be strictly ascending |
// AID of articles should be strictly ascending |
| 608 |
if (p_article_src->aid <= last_aid) |
if (p_article_src->aid <= last_aid) |
| 609 |
{ |
{ |
| 610 |
log_error("section_data_append_article(aid=%d) error: last_aid=%d\n", p_article_src->aid, last_aid); |
log_error("section_list_append_article(aid=%d) error: last_aid=%d\n", p_article_src->aid, last_aid); |
| 611 |
return -3; |
return -3; |
| 612 |
} |
} |
| 613 |
|
|
| 671 |
p_section->p_article_tail = p_article; |
p_section->p_article_tail = p_article; |
| 672 |
|
|
| 673 |
// Update page |
// Update page |
| 674 |
if (p_article->visible && p_section->last_page_visible_article_count % BBS_article_limit_per_page == 0) |
if ((p_article->visible && p_section->last_page_visible_article_count % BBS_article_limit_per_page == 0) || |
| 675 |
|
p_section->article_count == 1) |
| 676 |
{ |
{ |
| 677 |
p_section->p_page_first_article[p_section->page_count] = p_article; |
p_section->p_page_first_article[p_section->page_count] = p_article; |
| 678 |
p_section->page_count++; |
p_section->page_count++; |
| 679 |
p_section->last_page_visible_article_count = 0; |
p_section->last_page_visible_article_count = 0; |
| 680 |
} |
} |
| 681 |
p_section->last_page_visible_article_count++; |
|
| 682 |
|
if (p_article->visible) |
| 683 |
|
{ |
| 684 |
|
p_section->last_page_visible_article_count++; |
| 685 |
|
} |
| 686 |
|
|
| 687 |
return 0; |
return 0; |
| 688 |
} |
} |
| 705 |
return -1; // Not found |
return -1; // Not found |
| 706 |
} |
} |
| 707 |
|
|
| 708 |
|
if (p_section->sid != p_article->sid) |
| 709 |
|
{ |
| 710 |
|
log_error("section_list_set_article_visible() error: section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
| 711 |
|
return -2; |
| 712 |
|
} |
| 713 |
|
|
| 714 |
if (p_article->visible == visible) |
if (p_article->visible == visible) |
| 715 |
{ |
{ |
| 716 |
return 0; // Already set |
return 0; // Already set |
| 758 |
return affected_count; |
return affected_count; |
| 759 |
} |
} |
| 760 |
|
|
| 761 |
ARTICLE *section_list_find_article_with_offset(SECTION_LIST *p_section, int32_t aid, int32_t *p_page, int32_t *p_offset) |
ARTICLE *section_list_find_article_with_offset(SECTION_LIST *p_section, int32_t aid, int32_t *p_page, int32_t *p_offset, ARTICLE **pp_next) |
| 762 |
{ |
{ |
| 763 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 764 |
int left; |
int left; |
| 767 |
|
|
| 768 |
*p_page = -1; |
*p_page = -1; |
| 769 |
*p_offset = -1; |
*p_offset = -1; |
| 770 |
|
*pp_next = NULL; |
| 771 |
|
|
| 772 |
if (p_section == NULL) |
if (p_section == NULL) |
| 773 |
{ |
{ |
| 812 |
p_article = p_section->p_page_first_article[*p_page]; |
p_article = p_section->p_page_first_article[*p_page]; |
| 813 |
|
|
| 814 |
// p_section->p_page_first_article[*p_page]->aid <= aid < p_section->p_page_first_article[*p_page + 1]->aid |
// p_section->p_page_first_article[*p_page]->aid <= aid < p_section->p_page_first_article[*p_page + 1]->aid |
| 815 |
right = (*p_page == p_section->page_count - 1 ? INT32_MAX : p_section->p_page_first_article[*p_page + 1]->aid); |
right = (*p_page == MAX(0, p_section->page_count - 1) ? INT32_MAX : p_section->p_page_first_article[*p_page + 1]->aid); |
| 816 |
|
|
| 817 |
// left will be the offset of article found or offset to insert |
// left will be the offset of article found or offset to insert |
| 818 |
left = 0; |
left = 0; |
| 819 |
|
|
| 820 |
while (1) |
while (aid > p_article->aid) |
| 821 |
{ |
{ |
| 822 |
if (aid == p_article->aid) // found |
p_article = p_article->p_next; |
| 823 |
{ |
left++; |
| 824 |
break; |
|
| 825 |
} |
if (aid == p_article->aid) |
|
else if (aid < p_article->aid) // not exist |
|
| 826 |
{ |
{ |
| 827 |
p_article = NULL; |
*pp_next = p_article->p_next; |
| 828 |
break; |
break; |
| 829 |
} |
} |
| 830 |
|
|
|
// aid > p_article->aid |
|
|
p_article = p_article->p_next; |
|
|
left++; |
|
|
|
|
| 831 |
// over last article in the page |
// over last article in the page |
| 832 |
if (p_article == p_section->p_article_head || p_article->aid >= right) |
if (p_article == p_section->p_article_head || p_article->aid >= right) |
| 833 |
{ |
{ |
| 834 |
p_article = NULL; |
*pp_next = (p_article == p_section->p_article_head ? p_section->p_article_head : p_section->p_page_first_article[*p_page + 1]); |
| 835 |
break; |
*p_offset = left; |
| 836 |
|
return NULL; // not found |
| 837 |
} |
} |
| 838 |
} |
} |
| 839 |
|
|
| 840 |
|
if (aid < p_article->aid) |
| 841 |
|
{ |
| 842 |
|
*pp_next = p_article; |
| 843 |
|
p_article = NULL; // not found |
| 844 |
|
} |
| 845 |
|
else // aid == p_article->aid |
| 846 |
|
{ |
| 847 |
|
*pp_next = p_article->p_next; |
| 848 |
|
} |
| 849 |
|
|
| 850 |
*p_offset = left; |
*p_offset = left; |
| 851 |
|
|
| 852 |
return p_article; |
return p_article; |
| 854 |
|
|
| 855 |
int section_list_calculate_page(SECTION_LIST *p_section, int32_t start_aid) |
int section_list_calculate_page(SECTION_LIST *p_section, int32_t start_aid) |
| 856 |
{ |
{ |
| 857 |
// ARTICLE *p_article; |
ARTICLE *p_article; |
| 858 |
|
ARTICLE *p_next; |
| 859 |
|
int32_t page; |
| 860 |
|
int32_t offset; |
| 861 |
|
int visible_article_count; |
| 862 |
|
int page_head_set; |
| 863 |
|
|
| 864 |
if (p_section == NULL) |
if (p_section == NULL) |
| 865 |
{ |
{ |
| 867 |
return -1; |
return -1; |
| 868 |
} |
} |
| 869 |
|
|
| 870 |
|
if (p_section->article_count == 0) // empty |
| 871 |
|
{ |
| 872 |
|
p_section->page_count = 0; |
| 873 |
|
p_section->last_page_visible_article_count = 0; |
| 874 |
|
|
| 875 |
|
return 0; |
| 876 |
|
} |
| 877 |
|
|
| 878 |
|
if (start_aid > 0) |
| 879 |
|
{ |
| 880 |
|
p_article = article_block_find_by_aid(start_aid); |
| 881 |
|
if (p_article == NULL) |
| 882 |
|
{ |
| 883 |
|
return -1; // Not found |
| 884 |
|
} |
| 885 |
|
|
| 886 |
|
if (p_section->sid != p_article->sid) |
| 887 |
|
{ |
| 888 |
|
log_error("section_list_calculate_page() error: section sid %d != start article sid %d\n", p_section->sid, p_article->sid); |
| 889 |
|
return -2; |
| 890 |
|
} |
| 891 |
|
|
| 892 |
|
p_article = section_list_find_article_with_offset(p_section, start_aid, &page, &offset, &p_next); |
| 893 |
|
if (p_article == NULL) |
| 894 |
|
{ |
| 895 |
|
if (page < 0) |
| 896 |
|
{ |
| 897 |
|
return -1; |
| 898 |
|
} |
| 899 |
|
log_error("section_list_calculate_page() aid = %d not found in section sid = %d\n", |
| 900 |
|
start_aid, p_section->sid); |
| 901 |
|
return -2; |
| 902 |
|
} |
| 903 |
|
|
| 904 |
|
if (offset > 0) |
| 905 |
|
{ |
| 906 |
|
p_article = p_section->p_page_first_article[page]; |
| 907 |
|
} |
| 908 |
|
} |
| 909 |
|
else |
| 910 |
|
{ |
| 911 |
|
p_article = p_section->p_article_head; |
| 912 |
|
page = 0; |
| 913 |
|
offset = 0; |
| 914 |
|
} |
| 915 |
|
|
| 916 |
|
visible_article_count = 0; |
| 917 |
|
page_head_set = 0; |
| 918 |
|
|
| 919 |
|
do |
| 920 |
|
{ |
| 921 |
|
if (!page_head_set && visible_article_count == 0) |
| 922 |
|
{ |
| 923 |
|
p_section->p_page_first_article[page] = p_article; |
| 924 |
|
page_head_set = 1; |
| 925 |
|
} |
| 926 |
|
|
| 927 |
|
if (p_article->visible) |
| 928 |
|
{ |
| 929 |
|
visible_article_count++; |
| 930 |
|
} |
| 931 |
|
|
| 932 |
|
p_article = p_article->p_next; |
| 933 |
|
|
| 934 |
|
// skip remaining invisible articles |
| 935 |
|
while (p_article->visible == 0 && p_article != p_section->p_article_head) |
| 936 |
|
{ |
| 937 |
|
p_article = p_article->p_next; |
| 938 |
|
} |
| 939 |
|
|
| 940 |
|
if (visible_article_count >= BBS_article_limit_per_page && p_article != p_section->p_article_head) |
| 941 |
|
{ |
| 942 |
|
page++; |
| 943 |
|
visible_article_count = 0; |
| 944 |
|
page_head_set = 0; |
| 945 |
|
|
| 946 |
|
if (page >= BBS_article_limit_per_section / BBS_article_limit_per_page && p_article != p_section->p_article_head) |
| 947 |
|
{ |
| 948 |
|
log_error("Count of page exceed limit in section %d\n", p_section->sid); |
| 949 |
|
break; |
| 950 |
|
} |
| 951 |
|
} |
| 952 |
|
} while (p_article != p_section->p_article_head); |
| 953 |
|
|
| 954 |
|
p_section->page_count = page + (visible_article_count > 0 ? 1 : 0); |
| 955 |
|
p_section->last_page_visible_article_count = visible_article_count; |
| 956 |
|
|
| 957 |
return 0; |
return 0; |
| 958 |
} |
} |
| 959 |
|
|
| 960 |
|
int article_count_of_topic(int32_t aid) |
| 961 |
|
{ |
| 962 |
|
ARTICLE *p_article; |
| 963 |
|
int article_count; |
| 964 |
|
|
| 965 |
|
p_article = article_block_find_by_aid(aid); |
| 966 |
|
if (p_article == NULL) |
| 967 |
|
{ |
| 968 |
|
return 0; // Not found |
| 969 |
|
} |
| 970 |
|
|
| 971 |
|
article_count = 0; |
| 972 |
|
|
| 973 |
|
do |
| 974 |
|
{ |
| 975 |
|
if (p_article->tid != 0 && p_article->tid != aid) |
| 976 |
|
{ |
| 977 |
|
log_error("article_count_of_topic(%d) error: article %d not linked to the topic\n", aid, p_article->aid); |
| 978 |
|
break; |
| 979 |
|
} |
| 980 |
|
|
| 981 |
|
article_count++; |
| 982 |
|
p_article = p_article->p_topic_next; |
| 983 |
|
} while (p_article->aid != aid); |
| 984 |
|
|
| 985 |
|
return article_count; |
| 986 |
|
} |
| 987 |
|
|
| 988 |
|
int section_list_move_topic(SECTION_LIST *p_section_src, SECTION_LIST *p_section_dest, int32_t aid) |
| 989 |
|
{ |
| 990 |
|
ARTICLE *p_article; |
| 991 |
|
ARTICLE *p_next; |
| 992 |
|
int32_t page; |
| 993 |
|
int32_t offset; |
| 994 |
|
int32_t move_article_count; |
| 995 |
|
int32_t dest_article_count_old; |
| 996 |
|
int32_t last_unaffected_aid_src; |
| 997 |
|
int32_t first_inserted_aid_dest; |
| 998 |
|
int move_counter; |
| 999 |
|
|
| 1000 |
|
if (p_section_dest == NULL) |
| 1001 |
|
{ |
| 1002 |
|
log_error("section_list_move_topic() NULL pointer error\n"); |
| 1003 |
|
return -1; |
| 1004 |
|
} |
| 1005 |
|
|
| 1006 |
|
if ((p_article = article_block_find_by_aid(aid)) == NULL) |
| 1007 |
|
{ |
| 1008 |
|
log_error("section_list_move_topic() error: article %d not found in block\n", aid); |
| 1009 |
|
return -2; |
| 1010 |
|
} |
| 1011 |
|
|
| 1012 |
|
if (p_section_src->sid != p_article->sid) |
| 1013 |
|
{ |
| 1014 |
|
log_error("section_list_move_topic() error: src section sid %d != article %d sid %d\n", |
| 1015 |
|
p_section_src->sid, p_article->aid, p_article->sid); |
| 1016 |
|
return -2; |
| 1017 |
|
} |
| 1018 |
|
|
| 1019 |
|
if (p_article->tid != 0) |
| 1020 |
|
{ |
| 1021 |
|
log_error("section_list_move_topic(aid = %d) error: article is not head of topic, tid = %d\n", aid, p_article->tid); |
| 1022 |
|
return -2; |
| 1023 |
|
} |
| 1024 |
|
|
| 1025 |
|
last_unaffected_aid_src = (p_article == p_section_src->p_article_head ? 0 : p_article->p_prior->aid); |
| 1026 |
|
|
| 1027 |
|
move_article_count = article_count_of_topic(aid); |
| 1028 |
|
if (move_article_count <= 0) |
| 1029 |
|
{ |
| 1030 |
|
log_error("section_list_count_of_topic_articles(aid = %d) <= 0\n", aid); |
| 1031 |
|
return -2; |
| 1032 |
|
} |
| 1033 |
|
|
| 1034 |
|
if (p_section_dest->article_count + move_article_count > BBS_article_limit_per_section) |
| 1035 |
|
{ |
| 1036 |
|
log_error("section_list_move_topic() error: article_count %d reach limit in section %d\n", |
| 1037 |
|
p_section_dest->article_count + move_article_count, p_section_dest->sid); |
| 1038 |
|
return -3; |
| 1039 |
|
} |
| 1040 |
|
|
| 1041 |
|
dest_article_count_old = p_section_dest->article_count; |
| 1042 |
|
move_counter = 0; |
| 1043 |
|
first_inserted_aid_dest = p_article->aid; |
| 1044 |
|
|
| 1045 |
|
do |
| 1046 |
|
{ |
| 1047 |
|
if (p_section_src->sid != p_article->sid) |
| 1048 |
|
{ |
| 1049 |
|
log_error("section_list_move_topic() error: src section sid %d != article %d sid %d\n", |
| 1050 |
|
p_section_src->sid, p_article->aid, p_article->sid); |
| 1051 |
|
return -2; |
| 1052 |
|
} |
| 1053 |
|
|
| 1054 |
|
// Remove from bi-directional article list of src section |
| 1055 |
|
if (p_section_src->p_article_head == p_article) |
| 1056 |
|
{ |
| 1057 |
|
p_section_src->p_article_head = p_article->p_next; |
| 1058 |
|
} |
| 1059 |
|
if (p_section_src->p_article_tail == p_article) |
| 1060 |
|
{ |
| 1061 |
|
p_section_src->p_article_tail = p_article->p_prior; |
| 1062 |
|
} |
| 1063 |
|
if (p_section_src->p_article_head == p_article) // || p_section_src->p_article_tail == p_article |
| 1064 |
|
{ |
| 1065 |
|
p_section_src->p_article_head = NULL; |
| 1066 |
|
p_section_src->p_article_tail = NULL; |
| 1067 |
|
} |
| 1068 |
|
|
| 1069 |
|
p_article->p_prior->p_next = p_article->p_next; |
| 1070 |
|
p_article->p_next->p_prior = p_article->p_prior; |
| 1071 |
|
|
| 1072 |
|
// Update sid of article |
| 1073 |
|
p_article->sid = p_section_dest->sid; |
| 1074 |
|
|
| 1075 |
|
if (section_list_find_article_with_offset(p_section_dest, p_article->aid, &page, &offset, &p_next) != NULL) |
| 1076 |
|
{ |
| 1077 |
|
log_error("section_list_move_topic() error: article %d already in section %d\n", p_article->aid, p_section_dest->sid); |
| 1078 |
|
return -4; |
| 1079 |
|
} |
| 1080 |
|
|
| 1081 |
|
// Insert into bi-directional article list of dest section |
| 1082 |
|
if (p_next == NULL) // empty section |
| 1083 |
|
{ |
| 1084 |
|
p_section_dest->p_article_head = p_article; |
| 1085 |
|
p_section_dest->p_article_tail = p_article; |
| 1086 |
|
p_article->p_prior = p_article; |
| 1087 |
|
p_article->p_next = p_article; |
| 1088 |
|
} |
| 1089 |
|
else |
| 1090 |
|
{ |
| 1091 |
|
if (p_section_dest->p_article_head == p_next) |
| 1092 |
|
{ |
| 1093 |
|
if (p_article->aid < p_next->aid) |
| 1094 |
|
{ |
| 1095 |
|
p_section_dest->p_article_head = p_article; |
| 1096 |
|
} |
| 1097 |
|
else // p_article->aid > p_next->aid |
| 1098 |
|
{ |
| 1099 |
|
p_section_dest->p_article_tail = p_article; |
| 1100 |
|
} |
| 1101 |
|
} |
| 1102 |
|
|
| 1103 |
|
p_article->p_prior = p_next->p_prior; |
| 1104 |
|
p_article->p_next = p_next; |
| 1105 |
|
p_next->p_prior->p_next = p_article; |
| 1106 |
|
p_next->p_prior = p_article; |
| 1107 |
|
} |
| 1108 |
|
|
| 1109 |
|
// Update article / topic counter of src / desc section |
| 1110 |
|
p_section_src->article_count--; |
| 1111 |
|
p_section_dest->article_count++; |
| 1112 |
|
if (p_article->tid == 0) |
| 1113 |
|
{ |
| 1114 |
|
p_section_src->topic_count--; |
| 1115 |
|
p_section_dest->topic_count++; |
| 1116 |
|
} |
| 1117 |
|
|
| 1118 |
|
// Update visible article / topic counter of src / desc section |
| 1119 |
|
if (p_article->visible) |
| 1120 |
|
{ |
| 1121 |
|
p_section_src->visible_article_count--; |
| 1122 |
|
p_section_dest->visible_article_count++; |
| 1123 |
|
if (p_article->tid == 0) |
| 1124 |
|
{ |
| 1125 |
|
p_section_src->visible_topic_count--; |
| 1126 |
|
p_section_dest->visible_topic_count++; |
| 1127 |
|
} |
| 1128 |
|
} |
| 1129 |
|
|
| 1130 |
|
// Update page for empty dest section |
| 1131 |
|
if (p_section_dest->article_count == 1) |
| 1132 |
|
{ |
| 1133 |
|
p_section_dest->p_page_first_article[0] = p_article; |
| 1134 |
|
p_section_dest->page_count = 1; |
| 1135 |
|
p_section_dest->last_page_visible_article_count = (p_article->visible ? 1 : 0); |
| 1136 |
|
} |
| 1137 |
|
|
| 1138 |
|
p_article = p_article->p_topic_next; |
| 1139 |
|
|
| 1140 |
|
move_counter++; |
| 1141 |
|
if (move_counter % CALCULATE_PAGE_THRESHOLD == 0) |
| 1142 |
|
{ |
| 1143 |
|
// Re-calculate pages of desc section |
| 1144 |
|
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0) |
| 1145 |
|
{ |
| 1146 |
|
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n", |
| 1147 |
|
p_section_dest->sid, first_inserted_aid_dest); |
| 1148 |
|
} |
| 1149 |
|
|
| 1150 |
|
first_inserted_aid_dest = p_article->aid; |
| 1151 |
|
} |
| 1152 |
|
} while (p_article->aid != aid); |
| 1153 |
|
|
| 1154 |
|
if (p_section_dest->article_count - dest_article_count_old != move_article_count) |
| 1155 |
|
{ |
| 1156 |
|
log_error("section_list_move_topic() error: count of moved articles %d != %d\n", |
| 1157 |
|
p_section_dest->article_count - dest_article_count_old, move_article_count); |
| 1158 |
|
} |
| 1159 |
|
|
| 1160 |
|
// Re-calculate pages of src section |
| 1161 |
|
if (section_list_calculate_page(p_section_src, last_unaffected_aid_src) < 0) |
| 1162 |
|
{ |
| 1163 |
|
log_error("section_list_calculate_page(src section = %d, aid = %d) error at aid = %d\n", |
| 1164 |
|
p_section_src->sid, last_unaffected_aid_src, aid); |
| 1165 |
|
} |
| 1166 |
|
|
| 1167 |
|
if (move_counter % CALCULATE_PAGE_THRESHOLD != 0) |
| 1168 |
|
{ |
| 1169 |
|
// Re-calculate pages of desc section |
| 1170 |
|
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0) |
| 1171 |
|
{ |
| 1172 |
|
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n", |
| 1173 |
|
p_section_dest->sid, first_inserted_aid_dest); |
| 1174 |
|
} |
| 1175 |
|
} |
| 1176 |
|
|
| 1177 |
|
return move_article_count; |
| 1178 |
|
} |
| 1179 |
|
|
| 1180 |
|
int get_section_index(SECTION_LIST *p_section) |
| 1181 |
|
{ |
| 1182 |
|
int index; |
| 1183 |
|
|
| 1184 |
|
if (p_section_list_pool == NULL) |
| 1185 |
|
{ |
| 1186 |
|
log_error("get_section_index() error: uninitialized\n"); |
| 1187 |
|
return -1; |
| 1188 |
|
} |
| 1189 |
|
|
| 1190 |
|
if (p_section == NULL) |
| 1191 |
|
{ |
| 1192 |
|
index = BBS_max_section; |
| 1193 |
|
} |
| 1194 |
|
else |
| 1195 |
|
{ |
| 1196 |
|
index = (int)(p_section - p_section_list_pool); |
| 1197 |
|
if (index < 0 || index >= BBS_max_section) |
| 1198 |
|
{ |
| 1199 |
|
log_error("get_section_index(%d) error: index out of range\n", index); |
| 1200 |
|
return -2; |
| 1201 |
|
} |
| 1202 |
|
} |
| 1203 |
|
|
| 1204 |
|
return index; |
| 1205 |
|
} |
| 1206 |
|
|
| 1207 |
|
int section_list_try_rd_lock(SECTION_LIST *p_section, int wait_sec) |
| 1208 |
|
{ |
| 1209 |
|
int index; |
| 1210 |
|
struct sembuf sops[2]; |
| 1211 |
|
struct timespec timeout; |
| 1212 |
|
int ret; |
| 1213 |
|
|
| 1214 |
|
index = get_section_index(p_section); |
| 1215 |
|
if (index < 0) |
| 1216 |
|
{ |
| 1217 |
|
return -2; |
| 1218 |
|
} |
| 1219 |
|
|
| 1220 |
|
sops[0].sem_num = (unsigned short)index + 1; // w_sem of section index |
| 1221 |
|
sops[0].sem_op = 0; // check if unlocked |
| 1222 |
|
sops[0].sem_flg = 0; |
| 1223 |
|
|
| 1224 |
|
sops[1].sem_num = (unsigned short)index; // r_sem of section index |
| 1225 |
|
sops[1].sem_op = 1; // lock |
| 1226 |
|
sops[1].sem_flg = SEM_UNDO; // undo on terminate |
| 1227 |
|
|
| 1228 |
|
timeout.tv_sec = wait_sec; |
| 1229 |
|
timeout.tv_nsec = 0; |
| 1230 |
|
|
| 1231 |
|
ret = semtimedop(section_list_pool_semid, sops, 2, &timeout); |
| 1232 |
|
|
| 1233 |
|
return ret; |
| 1234 |
|
} |
| 1235 |
|
|
| 1236 |
|
int section_list_try_rw_lock(SECTION_LIST *p_section, int wait_sec) |
| 1237 |
|
{ |
| 1238 |
|
int index; |
| 1239 |
|
struct sembuf sops[3]; |
| 1240 |
|
struct timespec timeout; |
| 1241 |
|
int ret; |
| 1242 |
|
|
| 1243 |
|
index = get_section_index(p_section); |
| 1244 |
|
if (index < 0) |
| 1245 |
|
{ |
| 1246 |
|
return -2; |
| 1247 |
|
} |
| 1248 |
|
|
| 1249 |
|
sops[0].sem_num = (unsigned short)index + 1; // w_sem of section index |
| 1250 |
|
sops[0].sem_op = 0; // check if unlocked |
| 1251 |
|
sops[0].sem_flg = 0; |
| 1252 |
|
|
| 1253 |
|
sops[1].sem_num = (unsigned short)index + 1; // w_sem of section index |
| 1254 |
|
sops[1].sem_op = 1; // lock |
| 1255 |
|
sops[1].sem_flg = SEM_UNDO; // undo on terminate |
| 1256 |
|
|
| 1257 |
|
sops[2].sem_num = (unsigned short)index; // r_sem of section index |
| 1258 |
|
sops[1].sem_op = 0; // wait until unlocked |
| 1259 |
|
sops[1].sem_flg = 0; |
| 1260 |
|
|
| 1261 |
|
timeout.tv_sec = wait_sec; |
| 1262 |
|
timeout.tv_nsec = 0; |
| 1263 |
|
|
| 1264 |
|
ret = semtimedop(section_list_pool_semid, sops, 3, &timeout); |
| 1265 |
|
|
| 1266 |
|
return ret; |
| 1267 |
|
} |
| 1268 |
|
|
| 1269 |
|
int section_list_rd_unlock(SECTION_LIST *p_section) |
| 1270 |
|
{ |
| 1271 |
|
int index; |
| 1272 |
|
struct sembuf sops[1]; |
| 1273 |
|
int ret; |
| 1274 |
|
|
| 1275 |
|
index = get_section_index(p_section); |
| 1276 |
|
if (index < 0) |
| 1277 |
|
{ |
| 1278 |
|
return -2; |
| 1279 |
|
} |
| 1280 |
|
|
| 1281 |
|
sops[0].sem_num = (unsigned short)index; // r_sem of section index |
| 1282 |
|
sops[0].sem_op = -1; // unlock |
| 1283 |
|
sops[0].sem_flg = IPC_NOWAIT; // no wait |
| 1284 |
|
|
| 1285 |
|
ret = semop(section_list_pool_semid, sops, 1); |
| 1286 |
|
|
| 1287 |
|
return ret; |
| 1288 |
|
} |
| 1289 |
|
|
| 1290 |
|
int section_list_rw_unlock(SECTION_LIST *p_section) |
| 1291 |
|
{ |
| 1292 |
|
int index; |
| 1293 |
|
struct sembuf sops[1]; |
| 1294 |
|
int ret; |
| 1295 |
|
|
| 1296 |
|
index = get_section_index(p_section); |
| 1297 |
|
if (index < 0) |
| 1298 |
|
{ |
| 1299 |
|
return -2; |
| 1300 |
|
} |
| 1301 |
|
|
| 1302 |
|
sops[0].sem_num = (unsigned short)index + 1; // w_sem of section index |
| 1303 |
|
sops[0].sem_op = -1; // unlock |
| 1304 |
|
sops[0].sem_flg = IPC_NOWAIT; // no wait |
| 1305 |
|
|
| 1306 |
|
ret = semop(section_list_pool_semid, sops, 1); |
| 1307 |
|
|
| 1308 |
|
return ret; |
| 1309 |
|
} |