| 14 |
* * |
* * |
| 15 |
***************************************************************************/ |
***************************************************************************/ |
| 16 |
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#define _GNU_SOURCE |
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#include "section_list.h" |
|
| 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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| 106 |
return -1; |
return -1; |
| 107 |
} |
} |
| 108 |
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|
| 109 |
if (block_count > ARTICLE_BLOCK_PER_POOL) |
if (block_count <= 0 || block_count > ARTICLE_BLOCK_PER_POOL) |
| 110 |
{ |
{ |
| 111 |
log_error("article_block_count exceed limit %d\n", ARTICLE_BLOCK_PER_POOL); |
log_error("article_block_count exceed limit %d\n", ARTICLE_BLOCK_PER_POOL); |
| 112 |
return -2; |
return -2; |
| 397 |
} |
} |
| 398 |
} |
} |
| 399 |
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|
| 400 |
return (p_block->articles + left); |
if (aid != p_block->articles[left].aid) // not found |
| 401 |
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{ |
| 402 |
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return NULL; |
| 403 |
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} |
| 404 |
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|
| 405 |
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return (p_block->articles + left); // found |
| 406 |
} |
} |
| 407 |
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|
| 408 |
ARTICLE *article_block_find_by_index(int index) |
ARTICLE *article_block_find_by_index(int index) |
| 608 |
p_sid_str[i] = '\0'; |
p_sid_str[i] = '\0'; |
| 609 |
} |
} |
| 610 |
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|
| 611 |
SECTION_LIST *section_list_create(int32_t sid, const char *sname, const char *stitle, const char *master_name) |
SECTION_LIST *section_list_create(int32_t sid, const char *sname, const char *stitle, const char *master_list) |
| 612 |
{ |
{ |
| 613 |
SECTION_LIST *p_section; |
SECTION_LIST *p_section; |
| 614 |
char sid_str[SID_STR_LEN]; |
char sid_str[SID_STR_LEN]; |
| 631 |
|
|
| 632 |
p_section->sid = sid; |
p_section->sid = sid; |
| 633 |
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|
| 634 |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1); |
| 635 |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
p_section->sname[sizeof(p_section->sname) - 1] = '\0'; |
| 636 |
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|
| 637 |
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle - 1)); |
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle) - 1); |
| 638 |
p_section->stitle[sizeof(p_section->stitle - 1)] = '\0'; |
p_section->stitle[sizeof(p_section->stitle) - 1] = '\0'; |
| 639 |
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|
| 640 |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1); |
| 641 |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
p_section->master_list[sizeof(p_section->master_list) - 1] = '\0'; |
| 642 |
|
|
| 643 |
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, p_section_list_pool->section_count) != 1) |
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, p_section_list_pool->section_count) != 1) |
| 644 |
{ |
{ |
| 670 |
|
|
| 671 |
p_section->page_count = 0; |
p_section->page_count = 0; |
| 672 |
p_section->last_page_visible_article_count = 0; |
p_section->last_page_visible_article_count = 0; |
| 673 |
|
|
| 674 |
|
p_section->ontop_article_count = 0; |
| 675 |
} |
} |
| 676 |
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|
| 677 |
SECTION_LIST *section_list_find_by_name(const char *sname) |
SECTION_LIST *section_list_find_by_name(const char *sname) |
| 862 |
p_section->last_page_visible_article_count++; |
p_section->last_page_visible_article_count++; |
| 863 |
} |
} |
| 864 |
|
|
| 865 |
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if (p_article->ontop && section_list_update_article_ontop(p_section, p_article) < 0) |
| 866 |
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{ |
| 867 |
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log_error("section_list_update_article_ontop(sid=%d, aid=%d) error\n", |
| 868 |
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p_section->sid, p_article->aid); |
| 869 |
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return -5; |
| 870 |
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} |
| 871 |
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|
| 872 |
return 0; |
return 0; |
| 873 |
} |
} |
| 874 |
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|
| 880 |
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|
| 881 |
if (p_section == NULL) |
if (p_section == NULL) |
| 882 |
{ |
{ |
| 883 |
log_error("section_list_set_article_visible() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 884 |
return -2; |
return -1; |
| 885 |
} |
} |
| 886 |
|
|
| 887 |
p_article = article_block_find_by_aid(aid); |
p_article = article_block_find_by_aid(aid); |
| 892 |
|
|
| 893 |
if (p_section->sid != p_article->sid) |
if (p_section->sid != p_article->sid) |
| 894 |
{ |
{ |
| 895 |
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); |
| 896 |
return -2; |
return -2; |
| 897 |
} |
} |
| 898 |
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|
| 943 |
return affected_count; |
return affected_count; |
| 944 |
} |
} |
| 945 |
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| 946 |
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int section_list_update_article_ontop(SECTION_LIST *p_section, ARTICLE *p_article) |
| 947 |
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{ |
| 948 |
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int i; |
| 949 |
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|
| 950 |
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if (p_section == NULL || p_article == NULL) |
| 951 |
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{ |
| 952 |
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log_error("NULL pointer error\n"); |
| 953 |
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return -1; |
| 954 |
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} |
| 955 |
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| 956 |
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if (p_section->sid != p_article->sid) |
| 957 |
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{ |
| 958 |
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log_error("Inconsistent section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
| 959 |
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return -2; |
| 960 |
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} |
| 961 |
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| 962 |
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if (p_article->ontop) |
| 963 |
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{ |
| 964 |
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for (i = 0; i < p_section->ontop_article_count; i++) |
| 965 |
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{ |
| 966 |
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if (p_section->p_ontop_articles[i]->aid == p_article->aid) |
| 967 |
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{ |
| 968 |
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log_error("Inconsistent state found: article %d already ontop in section %d\n", p_article->aid, p_section->sid); |
| 969 |
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return 0; |
| 970 |
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} |
| 971 |
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else if (p_section->p_ontop_articles[i]->aid > p_article->aid) |
| 972 |
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{ |
| 973 |
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break; |
| 974 |
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} |
| 975 |
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} |
| 976 |
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| 977 |
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// Remove the oldest one if the array of ontop articles is full |
| 978 |
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if (p_section->ontop_article_count >= BBS_ontop_article_limit_per_section) |
| 979 |
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{ |
| 980 |
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if (i == 0) // p_article is the oldest one |
| 981 |
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{ |
| 982 |
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return 0; |
| 983 |
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} |
| 984 |
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memmove((void *)(p_section->p_ontop_articles), |
| 985 |
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(void *)(p_section->p_ontop_articles + 1), |
| 986 |
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sizeof(ARTICLE *) * (size_t)(i - 1)); |
| 987 |
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p_section->ontop_article_count--; |
| 988 |
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i--; |
| 989 |
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} |
| 990 |
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else |
| 991 |
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{ |
| 992 |
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memmove((void *)(p_section->p_ontop_articles + i + 1), |
| 993 |
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(void *)(p_section->p_ontop_articles + i), |
| 994 |
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sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i)); |
| 995 |
|
} |
| 996 |
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| 997 |
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p_section->p_ontop_articles[i] = p_article; |
| 998 |
|
p_section->ontop_article_count++; |
| 999 |
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| 1000 |
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// TODO: debug |
| 1001 |
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} |
| 1002 |
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else // ontop == 0 |
| 1003 |
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{ |
| 1004 |
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for (i = 0; i < p_section->ontop_article_count; i++) |
| 1005 |
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{ |
| 1006 |
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if (p_section->p_ontop_articles[i]->aid == p_article->aid) |
| 1007 |
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{ |
| 1008 |
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break; |
| 1009 |
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} |
| 1010 |
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} |
| 1011 |
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if (i == p_section->ontop_article_count) // not found |
| 1012 |
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{ |
| 1013 |
|
log_error("Inconsistent state found: article %d not ontop in section %d\n", p_article->aid, p_section->sid); |
| 1014 |
|
return 0; |
| 1015 |
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} |
| 1016 |
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|
| 1017 |
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memmove((void *)(p_section->p_ontop_articles + i), |
| 1018 |
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(void *)(p_section->p_ontop_articles + i + 1), |
| 1019 |
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sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i - 1)); |
| 1020 |
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p_section->ontop_article_count--; |
| 1021 |
|
} |
| 1022 |
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|
| 1023 |
|
return 0; |
| 1024 |
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} |
| 1025 |
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|
| 1026 |
|
int section_list_page_count_with_ontop(SECTION_LIST *p_section) |
| 1027 |
|
{ |
| 1028 |
|
int page_count; |
| 1029 |
|
|
| 1030 |
|
if (p_section == NULL) |
| 1031 |
|
{ |
| 1032 |
|
log_error("NULL pointer error\n"); |
| 1033 |
|
return -1; |
| 1034 |
|
} |
| 1035 |
|
|
| 1036 |
|
page_count = p_section->page_count - 1 + |
| 1037 |
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(p_section->last_page_visible_article_count + p_section->ontop_article_count) / BBS_article_limit_per_page + |
| 1038 |
|
((p_section->last_page_visible_article_count + p_section->ontop_article_count) % BBS_article_limit_per_page == 0 ? 0 : 1); |
| 1039 |
|
|
| 1040 |
|
return page_count; |
| 1041 |
|
} |
| 1042 |
|
|
| 1043 |
|
int section_list_page_article_count_with_ontop(SECTION_LIST *p_section, int32_t page_id) |
| 1044 |
|
{ |
| 1045 |
|
if (p_section == NULL) |
| 1046 |
|
{ |
| 1047 |
|
log_error("NULL pointer error\n"); |
| 1048 |
|
return -1; |
| 1049 |
|
} |
| 1050 |
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|
| 1051 |
|
if (page_id < p_section->page_count - 1) |
| 1052 |
|
{ |
| 1053 |
|
return BBS_article_limit_per_page; |
| 1054 |
|
} |
| 1055 |
|
else // if (page_id >= p_section->page_count - 1) |
| 1056 |
|
{ |
| 1057 |
|
return MAX(0, (p_section->last_page_visible_article_count + p_section->ontop_article_count - |
| 1058 |
|
BBS_article_limit_per_page * (page_id - p_section->page_count + 1))); |
| 1059 |
|
} |
| 1060 |
|
} |
| 1061 |
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|
| 1062 |
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) |
| 1063 |
{ |
{ |
| 1064 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 1266 |
return last_aid; |
return last_aid; |
| 1267 |
} |
} |
| 1268 |
|
|
| 1269 |
|
int article_block_article_count(void) |
| 1270 |
|
{ |
| 1271 |
|
int ret; |
| 1272 |
|
|
| 1273 |
|
if (p_article_block_pool == NULL || p_article_block_pool->block_count <= 0) |
| 1274 |
|
{ |
| 1275 |
|
return -1; |
| 1276 |
|
} |
| 1277 |
|
|
| 1278 |
|
ret = (p_article_block_pool->block_count - 1) * ARTICLE_PER_BLOCK + |
| 1279 |
|
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count; |
| 1280 |
|
|
| 1281 |
|
return ret; |
| 1282 |
|
} |
| 1283 |
|
|
| 1284 |
int article_count_of_topic(int32_t aid) |
int article_count_of_topic(int32_t aid) |
| 1285 |
{ |
{ |
| 1286 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 1321 |
int32_t first_inserted_aid_dest; |
int32_t first_inserted_aid_dest; |
| 1322 |
int move_counter; |
int move_counter; |
| 1323 |
|
|
| 1324 |
if (p_section_dest == NULL) |
if (p_section_src == NULL || p_section_dest == NULL) |
| 1325 |
{ |
{ |
| 1326 |
log_error("section_list_move_topic() NULL pointer error\n"); |
log_error("section_list_move_topic() NULL pointer error\n"); |
| 1327 |
return -1; |
return -1; |
| 1328 |
} |
} |
| 1329 |
|
|
| 1330 |
|
if (p_section_src->sid == p_section_dest->sid) |
| 1331 |
|
{ |
| 1332 |
|
log_error("section_list_move_topic() src and dest section are the same\n"); |
| 1333 |
|
return -1; |
| 1334 |
|
} |
| 1335 |
|
|
| 1336 |
if ((p_article = article_block_find_by_aid(aid)) == NULL) |
if ((p_article = article_block_find_by_aid(aid)) == NULL) |
| 1337 |
{ |
{ |
| 1338 |
log_error("section_list_move_topic() error: article %d not found in block\n", aid); |
log_error("article_block_find_by_aid(aid = %d) error: article not found\n", aid); |
| 1339 |
return -2; |
return -2; |
| 1340 |
} |
} |
| 1341 |
|
|
| 1376 |
{ |
{ |
| 1377 |
if (p_section_src->sid != p_article->sid) |
if (p_section_src->sid != p_article->sid) |
| 1378 |
{ |
{ |
| 1379 |
log_error("section_list_move_topic() error: src section sid %d != article %d sid %d\n", |
log_error("section_list_move_topic() warning: src section sid %d != article %d sid %d\n", |
| 1380 |
p_section_src->sid, p_article->aid, p_article->sid); |
p_section_src->sid, p_article->aid, p_article->sid); |
| 1381 |
return -2; |
p_article = p_article->p_topic_next; |
| 1382 |
|
continue; |
| 1383 |
} |
} |
| 1384 |
|
|
| 1385 |
// Remove from bi-directional article list of src section |
// Remove from bi-directional article list of src section |
| 1405 |
|
|
| 1406 |
if (section_list_find_article_with_offset(p_section_dest, p_article->aid, &page, &offset, &p_next) != NULL) |
if (section_list_find_article_with_offset(p_section_dest, p_article->aid, &page, &offset, &p_next) != NULL) |
| 1407 |
{ |
{ |
| 1408 |
log_error("section_list_move_topic() error: article %d already in section %d\n", p_article->aid, p_section_dest->sid); |
log_error("section_list_move_topic() warning: article %d already in section %d\n", p_article->aid, p_section_dest->sid); |
| 1409 |
return -4; |
p_article = p_article->p_topic_next; |
| 1410 |
|
continue; |
| 1411 |
} |
} |
| 1412 |
|
|
| 1413 |
// Insert into bi-directional article list of dest section |
// Insert into bi-directional article list of dest section |
| 1485 |
|
|
| 1486 |
if (p_section_dest->article_count - dest_article_count_old != move_article_count) |
if (p_section_dest->article_count - dest_article_count_old != move_article_count) |
| 1487 |
{ |
{ |
| 1488 |
log_error("section_list_move_topic() error: count of moved articles %d != %d\n", |
log_error("section_list_move_topic() warning: count of moved articles %d != %d\n", |
| 1489 |
p_section_dest->article_count - dest_article_count_old, move_article_count); |
p_section_dest->article_count - dest_article_count_old, move_article_count); |
| 1490 |
} |
} |
| 1491 |
|
|