| 14 |
* * |
* * |
| 15 |
***************************************************************************/ |
***************************************************************************/ |
| 16 |
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#define _GNU_SOURCE |
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#include "section_list.h" |
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| 17 |
#include "log.h" |
#include "log.h" |
| 18 |
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#include "section_list.h" |
| 19 |
#include "trie_dict.h" |
#include "trie_dict.h" |
| 20 |
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#include <errno.h> |
| 21 |
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#include <signal.h> |
| 22 |
#include <stdio.h> |
#include <stdio.h> |
| 23 |
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#include <stdlib.h> |
| 24 |
#include <string.h> |
#include <string.h> |
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#include <signal.h> |
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| 25 |
#include <unistd.h> |
#include <unistd.h> |
| 26 |
#include <stdlib.h> |
#include <sys/ipc.h> |
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#include <errno.h> |
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| 27 |
#include <sys/param.h> |
#include <sys/param.h> |
| 28 |
#include <sys/sem.h> |
#include <sys/sem.h> |
| 29 |
#include <sys/shm.h> |
#include <sys/shm.h> |
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#include <sys/ipc.h> |
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| 30 |
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| 31 |
#ifdef _SEM_SEMUN_UNDEFINED |
#ifdef _SEM_SEMUN_UNDEFINED |
| 32 |
union semun |
union semun |
| 42 |
#define SECTION_TRY_LOCK_WAIT_TIME 1 // second |
#define SECTION_TRY_LOCK_WAIT_TIME 1 // second |
| 43 |
#define SECTION_TRY_LOCK_TIMES 10 |
#define SECTION_TRY_LOCK_TIMES 10 |
| 44 |
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| 45 |
#define ARTICLE_BLOCK_PER_SHM 400 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
#define ARTICLE_BLOCK_PER_SHM 1000 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
| 46 |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 200 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 80 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
| 47 |
#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) |
| 48 |
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| 49 |
#define CALCULATE_PAGE_THRESHOLD 100 // Adjust to tune performance of move topic |
#define CALCULATE_PAGE_THRESHOLD 100 // Adjust to tune performance of moving topic between sections |
| 50 |
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| 51 |
#define SID_STR_LEN 5 // 32-bit + NULL |
#define SID_STR_LEN 5 // 32-bit + NULL |
| 52 |
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| 75 |
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| 76 |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
| 77 |
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| 78 |
struct section_list_pool_t |
SECTION_LIST_POOL *p_section_list_pool = NULL; |
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{ |
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int shmid; |
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SECTION_LIST sections[BBS_max_section]; |
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int section_count; |
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int semid; |
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TRIE_NODE *p_trie_dict_section_by_name; |
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TRIE_NODE *p_trie_dict_section_by_sid; |
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}; |
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typedef struct section_list_pool_t SECTION_LIST_POOL; |
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static SECTION_LIST_POOL *p_section_list_pool = NULL; |
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| 79 |
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| 80 |
int article_block_init(const char *filename, int block_count) |
int article_block_init(const char *filename, int block_count) |
| 81 |
{ |
{ |
| 619 |
p_section = p_section_list_pool->sections + p_section_list_pool->section_count; |
p_section = p_section_list_pool->sections + p_section_list_pool->section_count; |
| 620 |
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| 621 |
p_section->sid = sid; |
p_section->sid = sid; |
| 622 |
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p_section->ex_menu_tm = 0; |
| 623 |
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|
| 624 |
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1); |
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1); |
| 625 |
p_section->sname[sizeof(p_section->sname) - 1] = '\0'; |
p_section->sname[sizeof(p_section->sname) - 1] = '\0'; |
| 649 |
return p_section; |
return p_section; |
| 650 |
} |
} |
| 651 |
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| 652 |
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int section_list_update(SECTION_LIST *p_section, const char *sname, const char *stitle, const char *master_list) |
| 653 |
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{ |
| 654 |
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if (p_section == NULL || sname == NULL || stitle == NULL || master_list == NULL) |
| 655 |
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{ |
| 656 |
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log_error("NULL pointer error\n"); |
| 657 |
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return -1; |
| 658 |
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} |
| 659 |
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| 660 |
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strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1); |
| 661 |
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p_section->sname[sizeof(p_section->sname) - 1] = '\0'; |
| 662 |
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| 663 |
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strncpy(p_section->stitle, stitle, sizeof(p_section->stitle) - 1); |
| 664 |
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p_section->stitle[sizeof(p_section->stitle) - 1] = '\0'; |
| 665 |
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| 666 |
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strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1); |
| 667 |
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p_section->master_list[sizeof(p_section->master_list) - 1] = '\0'; |
| 668 |
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| 669 |
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if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, p_section_list_pool->section_count) != 1) |
| 670 |
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{ |
| 671 |
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log_error("trie_dict_set(section, %s, %d) error\n", sname, p_section_list_pool->section_count); |
| 672 |
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return -2; |
| 673 |
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} |
| 674 |
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| 675 |
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return 0; |
| 676 |
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} |
| 677 |
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| 678 |
void section_list_reset_articles(SECTION_LIST *p_section) |
void section_list_reset_articles(SECTION_LIST *p_section) |
| 679 |
{ |
{ |
| 680 |
p_section->article_count = 0; |
p_section->article_count = 0; |
| 686 |
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|
| 687 |
p_section->page_count = 0; |
p_section->page_count = 0; |
| 688 |
p_section->last_page_visible_article_count = 0; |
p_section->last_page_visible_article_count = 0; |
| 689 |
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| 690 |
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p_section->ontop_article_count = 0; |
| 691 |
} |
} |
| 692 |
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| 693 |
SECTION_LIST *section_list_find_by_name(const char *sname) |
SECTION_LIST *section_list_find_by_name(const char *sname) |
| 753 |
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| 754 |
if (p_section == NULL || p_article_src == NULL) |
if (p_section == NULL || p_article_src == NULL) |
| 755 |
{ |
{ |
| 756 |
log_error("section_list_append_article() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 757 |
return -1; |
return -1; |
| 758 |
} |
} |
| 759 |
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| 878 |
p_section->last_page_visible_article_count++; |
p_section->last_page_visible_article_count++; |
| 879 |
} |
} |
| 880 |
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| 881 |
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if (p_article->ontop && section_list_update_article_ontop(p_section, p_article) < 0) |
| 882 |
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{ |
| 883 |
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log_error("section_list_update_article_ontop(sid=%d, aid=%d) error\n", |
| 884 |
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p_section->sid, p_article->aid); |
| 885 |
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return -5; |
| 886 |
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} |
| 887 |
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| 888 |
return 0; |
return 0; |
| 889 |
} |
} |
| 890 |
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| 896 |
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| 897 |
if (p_section == NULL) |
if (p_section == NULL) |
| 898 |
{ |
{ |
| 899 |
log_error("section_list_set_article_visible() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 900 |
return -2; |
return -1; |
| 901 |
} |
} |
| 902 |
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|
| 903 |
p_article = article_block_find_by_aid(aid); |
p_article = article_block_find_by_aid(aid); |
| 908 |
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|
| 909 |
if (p_section->sid != p_article->sid) |
if (p_section->sid != p_article->sid) |
| 910 |
{ |
{ |
| 911 |
log_error("section_list_set_article_visible() error: section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
log_error("Inconsistent section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
| 912 |
return -2; |
return -2; |
| 913 |
} |
} |
| 914 |
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| 959 |
return affected_count; |
return affected_count; |
| 960 |
} |
} |
| 961 |
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| 962 |
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int section_list_update_article_ontop(SECTION_LIST *p_section, ARTICLE *p_article) |
| 963 |
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{ |
| 964 |
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int i; |
| 965 |
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| 966 |
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if (p_section == NULL || p_article == NULL) |
| 967 |
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{ |
| 968 |
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log_error("NULL pointer error\n"); |
| 969 |
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return -1; |
| 970 |
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} |
| 971 |
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| 972 |
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if (p_section->sid != p_article->sid) |
| 973 |
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{ |
| 974 |
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log_error("Inconsistent section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
| 975 |
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return -2; |
| 976 |
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} |
| 977 |
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| 978 |
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if (p_article->ontop) |
| 979 |
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{ |
| 980 |
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for (i = 0; i < p_section->ontop_article_count; i++) |
| 981 |
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{ |
| 982 |
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if (p_section->p_ontop_articles[i]->aid == p_article->aid) |
| 983 |
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{ |
| 984 |
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log_error("Inconsistent state found: article %d already ontop in section %d\n", p_article->aid, p_section->sid); |
| 985 |
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return 0; |
| 986 |
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} |
| 987 |
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else if (p_section->p_ontop_articles[i]->aid > p_article->aid) |
| 988 |
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{ |
| 989 |
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break; |
| 990 |
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} |
| 991 |
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} |
| 992 |
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| 993 |
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// Remove the oldest one if the array of ontop articles is full |
| 994 |
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if (p_section->ontop_article_count >= BBS_ontop_article_limit_per_section) |
| 995 |
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{ |
| 996 |
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if (i == 0) // p_article is the oldest one |
| 997 |
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{ |
| 998 |
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return 0; |
| 999 |
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} |
| 1000 |
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memmove((void *)(p_section->p_ontop_articles), |
| 1001 |
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(void *)(p_section->p_ontop_articles + 1), |
| 1002 |
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sizeof(ARTICLE *) * (size_t)(i - 1)); |
| 1003 |
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p_section->ontop_article_count--; |
| 1004 |
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i--; |
| 1005 |
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} |
| 1006 |
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else |
| 1007 |
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{ |
| 1008 |
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memmove((void *)(p_section->p_ontop_articles + i + 1), |
| 1009 |
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(void *)(p_section->p_ontop_articles + i), |
| 1010 |
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sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i)); |
| 1011 |
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} |
| 1012 |
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| 1013 |
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p_section->p_ontop_articles[i] = p_article; |
| 1014 |
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p_section->ontop_article_count++; |
| 1015 |
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| 1016 |
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// TODO: debug |
| 1017 |
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} |
| 1018 |
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else // ontop == 0 |
| 1019 |
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{ |
| 1020 |
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for (i = 0; i < p_section->ontop_article_count; i++) |
| 1021 |
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{ |
| 1022 |
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if (p_section->p_ontop_articles[i]->aid == p_article->aid) |
| 1023 |
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{ |
| 1024 |
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break; |
| 1025 |
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} |
| 1026 |
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} |
| 1027 |
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if (i == p_section->ontop_article_count) // not found |
| 1028 |
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{ |
| 1029 |
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log_error("Inconsistent state found: article %d not ontop in section %d\n", p_article->aid, p_section->sid); |
| 1030 |
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return 0; |
| 1031 |
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} |
| 1032 |
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|
| 1033 |
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memmove((void *)(p_section->p_ontop_articles + i), |
| 1034 |
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(void *)(p_section->p_ontop_articles + i + 1), |
| 1035 |
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sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i - 1)); |
| 1036 |
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p_section->ontop_article_count--; |
| 1037 |
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} |
| 1038 |
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|
| 1039 |
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return 0; |
| 1040 |
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} |
| 1041 |
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| 1042 |
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int section_list_page_count_with_ontop(SECTION_LIST *p_section) |
| 1043 |
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{ |
| 1044 |
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int page_count; |
| 1045 |
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|
| 1046 |
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if (p_section == NULL) |
| 1047 |
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{ |
| 1048 |
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log_error("NULL pointer error\n"); |
| 1049 |
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return -1; |
| 1050 |
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} |
| 1051 |
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| 1052 |
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page_count = p_section->page_count - (p_section->last_page_visible_article_count > 0 ? 1 : 0) + |
| 1053 |
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(p_section->last_page_visible_article_count + p_section->ontop_article_count) / BBS_article_limit_per_page + |
| 1054 |
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((p_section->last_page_visible_article_count + p_section->ontop_article_count) % BBS_article_limit_per_page == 0 ? 0 : 1); |
| 1055 |
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|
| 1056 |
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return page_count; |
| 1057 |
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} |
| 1058 |
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| 1059 |
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int section_list_page_article_count_with_ontop(SECTION_LIST *p_section, int32_t page_id) |
| 1060 |
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{ |
| 1061 |
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if (p_section == NULL) |
| 1062 |
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{ |
| 1063 |
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log_error("NULL pointer error\n"); |
| 1064 |
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return -1; |
| 1065 |
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} |
| 1066 |
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|
| 1067 |
|
if (page_id < p_section->page_count - 1) |
| 1068 |
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{ |
| 1069 |
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return BBS_article_limit_per_page; |
| 1070 |
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} |
| 1071 |
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else // if (page_id >= p_section->page_count - 1) |
| 1072 |
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{ |
| 1073 |
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return MAX(0, (p_section->last_page_visible_article_count + p_section->ontop_article_count - |
| 1074 |
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BBS_article_limit_per_page * (page_id - p_section->page_count + 1))); |
| 1075 |
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} |
| 1076 |
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} |
| 1077 |
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| 1078 |
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) |
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) |
| 1079 |
{ |
{ |
| 1080 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 1088 |
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|
| 1089 |
if (p_section == NULL) |
if (p_section == NULL) |
| 1090 |
{ |
{ |
| 1091 |
log_error("section_list_find_article_with_offset() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1092 |
return NULL; |
return NULL; |
| 1093 |
} |
} |
| 1094 |
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|
| 1180 |
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|
| 1181 |
if (p_section == NULL) |
if (p_section == NULL) |
| 1182 |
{ |
{ |
| 1183 |
log_error("section_list_calculate_page() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1184 |
return -1; |
return -1; |
| 1185 |
} |
} |
| 1186 |
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|
| 1339 |
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|
| 1340 |
if (p_section_src == NULL || p_section_dest == NULL) |
if (p_section_src == NULL || p_section_dest == NULL) |
| 1341 |
{ |
{ |
| 1342 |
log_error("section_list_move_topic() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1343 |
return -1; |
return -1; |
| 1344 |
} |
} |
| 1345 |
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|
| 1711 |
timer++; |
timer++; |
| 1712 |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1713 |
{ |
{ |
| 1714 |
log_error("section_list_rd_lock() tried %d times on section %d\n", sid, timer); |
log_error("section_list_try_rd_lock() tried %d times on section %d\n", sid, timer); |
| 1715 |
} |
} |
| 1716 |
} |
} |
| 1717 |
else // failed |
else // failed |
| 1718 |
{ |
{ |
| 1719 |
log_error("section_list_rd_lock() failed on section %d\n", sid); |
log_error("section_list_try_rd_lock() failed on section %d\n", sid); |
| 1720 |
break; |
break; |
| 1721 |
} |
} |
| 1722 |
} |
} |
| 1742 |
timer++; |
timer++; |
| 1743 |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1744 |
{ |
{ |
| 1745 |
log_error("acquire_section_rw_lock() tried %d times on section %d\n", sid, timer); |
log_error("section_list_try_rw_lock() tried %d times on section %d\n", sid, timer); |
| 1746 |
} |
} |
| 1747 |
} |
} |
| 1748 |
else // failed |
else // failed |
| 1749 |
{ |
{ |
| 1750 |
log_error("acquire_section_rw_lock() failed on section %d\n", sid); |
log_error("section_list_try_rw_lock() failed on section %d\n", sid); |
| 1751 |
break; |
break; |
| 1752 |
} |
} |
| 1753 |
} |
} |