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/*************************************************************************** |
/* SPDX-License-Identifier: GPL-3.0-or-later */ |
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section_list.c - description |
/* |
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------------------- |
* section_list |
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Copyright : (C) 2004-2025 by Leaflet |
* - data models and basic operations of section and article |
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Email : leaflet@leafok.com |
* |
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***************************************************************************/ |
* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com> |
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*/ |
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/*************************************************************************** |
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* * |
#ifdef HAVE_CONFIG_H |
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* This program is free software; you can redistribute it and/or modify * |
#include "config.h" |
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* it under the terms of the GNU General Public License as published by * |
#endif |
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* the Free Software Foundation; either version 3 of the License, or * |
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* (at your option) any later version. * |
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* * |
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***************************************************************************/ |
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#include "section_list.h" |
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#include "log.h" |
#include "log.h" |
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#include "section_list.h" |
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#include "trie_dict.h" |
#include "trie_dict.h" |
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#include "user_list.h" |
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#include <errno.h> |
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#include <signal.h> |
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#include <stdio.h> |
#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
#include <string.h> |
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#include <signal.h> |
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#include <unistd.h> |
#include <unistd.h> |
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#include <stdlib.h> |
#include <sys/ipc.h> |
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#include <errno.h> |
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#include <sys/param.h> |
#include <sys/param.h> |
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#include <sys/sem.h> |
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#include <sys/shm.h> |
#include <sys/shm.h> |
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#include <sys/ipc.h> |
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#define ARTICLE_BLOCK_PER_SHM 400 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
#if defined(_SEM_SEMUN_UNDEFINED) || defined(__CYGWIN__) |
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#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 256 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
union semun |
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#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
{ |
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int val; /* Value for SETVAL */ |
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struct semid_ds *buf; /* Buffer for IPC_STAT, IPC_SET */ |
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unsigned short *array; /* Array for GETALL, SETALL */ |
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struct seminfo *__buf; /* Buffer for IPC_INFO |
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(Linux-specific) */ |
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}; |
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#endif // #if defined(_SEM_SEMUN_UNDEFINED) |
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struct article_block_t |
enum _section_list_constant_t |
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{ |
{ |
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ARTICLE articles[ARTICLE_PER_BLOCK]; |
SECTION_TRY_LOCK_WAIT_TIME = 1, // second |
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int32_t article_count; |
SECTION_TRY_LOCK_TIMES = 10, |
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struct article_block_t *p_next_block; |
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ARTICLE_BLOCK_PER_SHM = 1000, // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
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ARTICLE_BLOCK_SHM_COUNT_LIMIT = 80, // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
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ARTICLE_BLOCK_PER_POOL = (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT), |
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CALCULATE_PAGE_THRESHOLD = 100, // Adjust to tune performance of moving topic between sections |
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SID_STR_LEN = 5, // 32-bit + NULL |
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}; |
}; |
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typedef struct article_block_t ARTICLE_BLOCK; |
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struct article_block_shm_t |
struct article_block_t |
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{ |
{ |
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int shmid; |
ARTICLE articles[BBS_article_count_per_block]; |
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void *p_shm; |
int article_count; |
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struct article_block_t *p_next_block; |
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}; |
}; |
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typedef struct article_block_shm_t ARTICLE_BLOCK_SHM; |
typedef struct article_block_t ARTICLE_BLOCK; |
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struct article_block_pool_t |
struct article_block_pool_t |
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{ |
{ |
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ARTICLE_BLOCK_SHM shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
int shmid; |
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struct |
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{ |
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int shmid; |
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void *p_shm; |
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} shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
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int shm_count; |
int shm_count; |
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ARTICLE_BLOCK *p_block_free_list; |
ARTICLE_BLOCK *p_block_free_list; |
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ARTICLE_BLOCK *p_block[ARTICLE_BLOCK_PER_POOL]; |
ARTICLE_BLOCK *p_block[ARTICLE_BLOCK_PER_POOL]; |
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int32_t block_count; |
int block_count; |
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}; |
}; |
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typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
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static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
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static SECTION_LIST *p_section_list_pool = NULL; |
SECTION_LIST_POOL *p_section_list_pool = NULL; |
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static int section_list_count = 0; |
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static TRIE_NODE *p_trie_dict_section_list = NULL; |
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int article_block_init(const char *filename, int block_count) |
int article_block_init(const char *filename, int block_count) |
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{ |
{ |
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return -1; |
return -1; |
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} |
} |
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if (block_count > ARTICLE_BLOCK_PER_POOL) |
if (block_count <= 0 || block_count > ARTICLE_BLOCK_PER_POOL) |
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{ |
{ |
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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); |
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return -2; |
return -2; |
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} |
} |
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p_article_block_pool = calloc(1, sizeof(ARTICLE_BLOCK_POOL)); |
// Allocate shared memory |
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if (p_article_block_pool == NULL) |
proj_id = ARTICLE_BLOCK_SHM_COUNT_LIMIT; // keep different from proj_id used to create block shm |
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key = ftok(filename, proj_id); |
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if (key == -1) |
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{ |
{ |
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log_error("calloc(ARTICLE_BLOCK_POOL) OOM\n"); |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
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return -2; |
return -3; |
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} |
} |
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// Allocate shared memory |
size = sizeof(ARTICLE_BLOCK_POOL); |
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shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
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if (shmid == -1) |
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{ |
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log_error("shmget(article_block_pool_shm, size = %d) error (%d)\n", size, errno); |
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return -3; |
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} |
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p_shm = shmat(shmid, NULL, 0); |
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if (p_shm == (void *)-1) |
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{ |
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log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
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return -3; |
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} |
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p_article_block_pool = p_shm; |
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p_article_block_pool->shmid = shmid; |
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p_article_block_pool->shm_count = 0; |
p_article_block_pool->shm_count = 0; |
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pp_block_next = &(p_article_block_pool->p_block_free_list); |
pp_block_next = &(p_article_block_pool->p_block_free_list); |
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block_count_in_shm = MIN(block_count, ARTICLE_BLOCK_PER_SHM); |
block_count_in_shm = MIN(block_count, ARTICLE_BLOCK_PER_SHM); |
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block_count -= block_count_in_shm; |
block_count -= block_count_in_shm; |
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proj_id = getpid() + p_article_block_pool->shm_count; |
proj_id = p_article_block_pool->shm_count; |
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key = ftok(filename, proj_id); |
key = ftok(filename, proj_id); |
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if (key == -1) |
if (key == -1) |
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{ |
{ |
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return -3; |
return -3; |
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} |
} |
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size = sizeof(shmid) + sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
size = sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
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shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
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if (shmid == -1) |
if (shmid == -1) |
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{ |
{ |
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void article_block_cleanup(void) |
void article_block_cleanup(void) |
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{ |
{ |
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if (p_article_block_pool != NULL) |
int shmid; |
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if (p_article_block_pool == NULL) |
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{ |
{ |
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for (int i = 0; i < p_article_block_pool->shm_count; i++) |
return; |
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} |
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for (int i = 0; i < p_article_block_pool->shm_count; i++) |
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{ |
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if (shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
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{ |
{ |
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if (shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
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{ |
} |
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log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
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} |
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if (shmctl((p_article_block_pool->shm_pool + i)->shmid, IPC_RMID, NULL) == -1) |
if (shmctl((p_article_block_pool->shm_pool + i)->shmid, IPC_RMID, NULL) == -1) |
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{ |
{ |
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log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
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} |
} |
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} |
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shmid = p_article_block_pool->shmid; |
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if (shmdt(p_article_block_pool) == -1) |
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{ |
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log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
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} |
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if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1) |
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{ |
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log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", shmid, errno); |
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} |
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p_article_block_pool = NULL; |
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} |
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int set_article_block_shm_readonly(void) |
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{ |
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int shmid; |
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void *p_shm; |
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int i; |
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if (p_article_block_pool == NULL) |
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{ |
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log_error("article_block_pool not initialized\n"); |
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return -1; |
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} |
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for (i = 0; i < p_article_block_pool->shm_count; i++) |
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{ |
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shmid = (p_article_block_pool->shm_pool + i)->shmid; |
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// Remap shared memory in read-only mode |
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#if defined(__CYGWIN__) |
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if (shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
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{ |
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log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
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return -2; |
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} |
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p_shm = shmat(shmid, (p_article_block_pool->shm_pool + i)->p_shm, SHM_RDONLY); |
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#else |
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p_shm = shmat(shmid, (p_article_block_pool->shm_pool + i)->p_shm, SHM_RDONLY | SHM_REMAP); |
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#endif |
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if (p_shm == (void *)-1) |
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{ |
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log_error("shmat(article_block_pool shmid = %d) error (%d)\n", shmid, errno); |
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return -2; |
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} |
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} |
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return 0; |
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} |
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int detach_article_block_shm(void) |
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{ |
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int shmid; |
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if (p_article_block_pool == NULL) |
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{ |
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return -1; |
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} |
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for (int i = 0; i < p_article_block_pool->shm_count; i++) |
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{ |
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if ((p_article_block_pool->shm_pool + i)->p_shm != NULL && shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
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{ |
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log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
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return -2; |
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} |
} |
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} |
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shmid = p_article_block_pool->shmid; |
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free(p_article_block_pool); |
if (shmdt(p_article_block_pool) == -1) |
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p_article_block_pool = NULL; |
{ |
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log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
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return -3; |
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} |
} |
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p_article_block_pool = NULL; |
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return 0; |
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} |
} |
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inline static ARTICLE_BLOCK *pop_free_article_block(void) |
inline static ARTICLE_BLOCK *pop_free_article_block(void) |
| 351 |
} |
} |
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left = 0; |
left = 0; |
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right = p_article_block_pool->block_count; |
right = p_article_block_pool->block_count - 1; |
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|
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// aid in the range [ head aid of blocks[left], tail aid of blocks[right - 1] ] |
// aid in the range [ head aid of blocks[left], tail aid of blocks[right] ] |
| 357 |
while (left < right - 1) |
while (left < right) |
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{ |
{ |
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// get block offset no less than mid value of left and right block offsets |
// get block offset no less than mid value of left and right block offsets |
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mid = (left + right) / 2 + (right - left) % 2; |
mid = (left + right) / 2 + (left + right) % 2; |
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if (mid >= p_article_block_pool->block_count) |
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{ |
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log_error("block(mid = %d) is out of boundary\n", mid); |
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return NULL; |
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} |
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| 362 |
if (aid < p_article_block_pool->p_block[mid]->articles[0].aid) |
if (aid < p_article_block_pool->p_block[mid]->articles[0].aid) |
| 363 |
{ |
{ |
| 364 |
right = mid; |
right = mid - 1; |
| 365 |
} |
} |
| 366 |
else |
else // if (aid >= p_article_block_pool->p_block[mid]->articles[0].aid) |
| 367 |
{ |
{ |
| 368 |
left = mid; |
left = mid; |
| 369 |
} |
} |
| 389 |
} |
} |
| 390 |
} |
} |
| 391 |
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|
| 392 |
return (p_block->articles + left); |
if (aid != p_block->articles[left].aid) // not found |
| 393 |
|
{ |
| 394 |
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return NULL; |
| 395 |
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} |
| 396 |
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| 397 |
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return (p_block->articles + left); // found |
| 398 |
} |
} |
| 399 |
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|
| 400 |
ARTICLE *article_block_find_by_index(int index) |
ARTICLE *article_block_find_by_index(int index) |
| 407 |
return NULL; |
return NULL; |
| 408 |
} |
} |
| 409 |
|
|
| 410 |
if (index < 0 || index / ARTICLE_PER_BLOCK >= p_article_block_pool->block_count) |
if (index < 0 || index / BBS_article_count_per_block >= p_article_block_pool->block_count) |
| 411 |
{ |
{ |
| 412 |
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); |
| 413 |
return NULL; |
return NULL; |
| 414 |
} |
} |
| 415 |
|
|
| 416 |
p_block = p_article_block_pool->p_block[index / ARTICLE_PER_BLOCK]; |
p_block = p_article_block_pool->p_block[index / BBS_article_count_per_block]; |
| 417 |
|
|
| 418 |
if (index % ARTICLE_PER_BLOCK >= p_block->article_count) |
if (index % BBS_article_count_per_block >= p_block->article_count) |
| 419 |
{ |
{ |
| 420 |
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); |
| 421 |
return NULL; |
return NULL; |
| 422 |
} |
} |
| 423 |
|
|
| 424 |
return (p_block->articles + (index % ARTICLE_PER_BLOCK)); |
return (p_block->articles + (index % BBS_article_count_per_block)); |
| 425 |
} |
} |
| 426 |
|
|
| 427 |
SECTION_LIST *section_list_create(const char *sname, const char *stitle, const char *master_name) |
extern int section_list_init(const char *filename) |
| 428 |
{ |
{ |
| 429 |
SECTION_LIST *p_section; |
int semid; |
| 430 |
|
int shmid; |
| 431 |
|
int proj_id; |
| 432 |
|
key_t key; |
| 433 |
|
size_t size; |
| 434 |
|
void *p_shm; |
| 435 |
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union semun arg; |
| 436 |
|
int i; |
| 437 |
|
|
| 438 |
if (p_section_list_pool == NULL) |
if (p_section_list_pool != NULL) |
| 439 |
{ |
{ |
| 440 |
p_section_list_pool = calloc(BBS_max_section, sizeof(SECTION_LIST)); |
section_list_cleanup(); |
| 441 |
if (p_section_list_pool == NULL) |
} |
|
{ |
|
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log_error("calloc(%d SECTION_LIST) OOM\n", BBS_max_section); |
|
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return NULL; |
|
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} |
|
| 442 |
|
|
| 443 |
section_list_count = 0; |
proj_id = (int)(time(NULL) % getpid()); |
| 444 |
|
key = ftok(filename, proj_id); |
| 445 |
|
if (key == -1) |
| 446 |
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{ |
| 447 |
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log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
| 448 |
|
return -3; |
| 449 |
} |
} |
| 450 |
|
|
| 451 |
if (p_trie_dict_section_list == NULL) |
// Allocate shared memory |
| 452 |
|
size = sizeof(SECTION_LIST_POOL); |
| 453 |
|
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
| 454 |
|
if (shmid == -1) |
| 455 |
{ |
{ |
| 456 |
p_trie_dict_section_list = trie_dict_create(); |
log_error("shmget(section_list_pool_shm, size = %d) error (%d)\n", size, errno); |
| 457 |
if (p_trie_dict_section_list == NULL) |
return -3; |
| 458 |
|
} |
| 459 |
|
p_shm = shmat(shmid, NULL, 0); |
| 460 |
|
if (p_shm == (void *)-1) |
| 461 |
|
{ |
| 462 |
|
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
| 463 |
|
return -3; |
| 464 |
|
} |
| 465 |
|
|
| 466 |
|
p_section_list_pool = p_shm; |
| 467 |
|
p_section_list_pool->shmid = shmid; |
| 468 |
|
p_section_list_pool->section_count = 0; |
| 469 |
|
|
| 470 |
|
// Allocate semaphore as section locks |
| 471 |
|
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections |
| 472 |
|
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600); |
| 473 |
|
if (semid == -1) |
| 474 |
|
{ |
| 475 |
|
log_error("semget(section_list_pool_sem, size = %d) error (%d)\n", size, errno); |
| 476 |
|
return -3; |
| 477 |
|
} |
| 478 |
|
|
| 479 |
|
// Initialize sem value to 0 |
| 480 |
|
arg.val = 0; |
| 481 |
|
for (i = 0; i < size; i++) |
| 482 |
|
{ |
| 483 |
|
if (semctl(semid, i, SETVAL, arg) == -1) |
| 484 |
{ |
{ |
| 485 |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
log_error("semctl(section_list_pool_sem, SETVAL) error (%d)\n", errno); |
| 486 |
return NULL; |
return -3; |
| 487 |
} |
} |
| 488 |
} |
} |
| 489 |
|
|
| 490 |
if (section_list_count >= BBS_max_section) |
p_section_list_pool->semid = semid; |
| 491 |
|
|
| 492 |
|
p_section_list_pool->p_trie_dict_section_by_name = trie_dict_create(); |
| 493 |
|
if (p_section_list_pool->p_trie_dict_section_by_name == NULL) |
| 494 |
|
{ |
| 495 |
|
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 496 |
|
return -2; |
| 497 |
|
} |
| 498 |
|
|
| 499 |
|
p_section_list_pool->p_trie_dict_section_by_sid = trie_dict_create(); |
| 500 |
|
if (p_section_list_pool->p_trie_dict_section_by_sid == NULL) |
| 501 |
|
{ |
| 502 |
|
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 503 |
|
return -2; |
| 504 |
|
} |
| 505 |
|
|
| 506 |
|
return 0; |
| 507 |
|
} |
| 508 |
|
|
| 509 |
|
void section_list_cleanup(void) |
| 510 |
|
{ |
| 511 |
|
int shmid; |
| 512 |
|
|
| 513 |
|
if (p_section_list_pool == NULL) |
| 514 |
|
{ |
| 515 |
|
return; |
| 516 |
|
} |
| 517 |
|
|
| 518 |
|
if (p_section_list_pool->p_trie_dict_section_by_name != NULL) |
| 519 |
|
{ |
| 520 |
|
trie_dict_destroy(p_section_list_pool->p_trie_dict_section_by_name); |
| 521 |
|
p_section_list_pool->p_trie_dict_section_by_name = NULL; |
| 522 |
|
} |
| 523 |
|
|
| 524 |
|
if (p_section_list_pool->p_trie_dict_section_by_sid != NULL) |
| 525 |
{ |
{ |
| 526 |
log_error("section_list_count exceed limit %d\n", BBS_max_section); |
trie_dict_destroy(p_section_list_pool->p_trie_dict_section_by_sid); |
| 527 |
|
p_section_list_pool->p_trie_dict_section_by_sid = NULL; |
| 528 |
|
} |
| 529 |
|
|
| 530 |
|
shmid = p_section_list_pool->shmid; |
| 531 |
|
|
| 532 |
|
if (semctl(p_section_list_pool->semid, 0, IPC_RMID) == -1) |
| 533 |
|
{ |
| 534 |
|
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", p_section_list_pool->semid, errno); |
| 535 |
|
} |
| 536 |
|
|
| 537 |
|
if (shmdt(p_section_list_pool) == -1) |
| 538 |
|
{ |
| 539 |
|
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
| 540 |
|
} |
| 541 |
|
|
| 542 |
|
if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1) |
| 543 |
|
{ |
| 544 |
|
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", shmid, errno); |
| 545 |
|
} |
| 546 |
|
|
| 547 |
|
p_section_list_pool = NULL; |
| 548 |
|
} |
| 549 |
|
|
| 550 |
|
int set_section_list_shm_readonly(void) |
| 551 |
|
{ |
| 552 |
|
int shmid; |
| 553 |
|
void *p_shm; |
| 554 |
|
|
| 555 |
|
if (p_section_list_pool == NULL) |
| 556 |
|
{ |
| 557 |
|
log_error("p_section_list_pool not initialized\n"); |
| 558 |
|
return -1; |
| 559 |
|
} |
| 560 |
|
|
| 561 |
|
shmid = p_section_list_pool->shmid; |
| 562 |
|
|
| 563 |
|
// Remap shared memory in read-only mode |
| 564 |
|
#if defined(__CYGWIN__) |
| 565 |
|
if (shmdt(p_section_list_pool) == -1) |
| 566 |
|
{ |
| 567 |
|
log_error("shmdt(section_list_pool) error (%d)\n", errno); |
| 568 |
|
return -1; |
| 569 |
|
} |
| 570 |
|
p_shm = shmat(shmid, p_section_list_pool, SHM_RDONLY); |
| 571 |
|
#else |
| 572 |
|
p_shm = shmat(shmid, p_section_list_pool, SHM_RDONLY | SHM_REMAP); |
| 573 |
|
#endif |
| 574 |
|
if (p_shm == (void *)-1) |
| 575 |
|
{ |
| 576 |
|
log_error("shmat(section_list_pool shmid = %d) error (%d)\n", shmid, errno); |
| 577 |
|
return -3; |
| 578 |
|
} |
| 579 |
|
|
| 580 |
|
p_section_list_pool = p_shm; |
| 581 |
|
|
| 582 |
|
return 0; |
| 583 |
|
} |
| 584 |
|
|
| 585 |
|
int detach_section_list_shm(void) |
| 586 |
|
{ |
| 587 |
|
if (p_section_list_pool != NULL && shmdt(p_section_list_pool) == -1) |
| 588 |
|
{ |
| 589 |
|
log_error("shmdt(section_list_pool) error (%d)\n", errno); |
| 590 |
|
return -1; |
| 591 |
|
} |
| 592 |
|
|
| 593 |
|
p_section_list_pool = NULL; |
| 594 |
|
|
| 595 |
|
return 0; |
| 596 |
|
} |
| 597 |
|
|
| 598 |
|
inline static void sid_to_str(int32_t sid, char *p_sid_str) |
| 599 |
|
{ |
| 600 |
|
uint32_t u_sid; |
| 601 |
|
int i; |
| 602 |
|
|
| 603 |
|
u_sid = (uint32_t)sid; |
| 604 |
|
for (i = 0; i < SID_STR_LEN - 1; i++) |
| 605 |
|
{ |
| 606 |
|
p_sid_str[i] = (char)(u_sid % 255 + 1); |
| 607 |
|
u_sid /= 255; |
| 608 |
|
} |
| 609 |
|
p_sid_str[i] = '\0'; |
| 610 |
|
} |
| 611 |
|
|
| 612 |
|
SECTION_LIST *section_list_create(int32_t sid, const char *sname, const char *stitle, const char *master_list) |
| 613 |
|
{ |
| 614 |
|
SECTION_LIST *p_section; |
| 615 |
|
char sid_str[SID_STR_LEN]; |
| 616 |
|
|
| 617 |
|
if (p_section_list_pool == NULL) |
| 618 |
|
{ |
| 619 |
|
log_error("session_list_pool not initialized\n"); |
| 620 |
|
return NULL; |
| 621 |
|
} |
| 622 |
|
|
| 623 |
|
if (p_section_list_pool->section_count >= BBS_max_section) |
| 624 |
|
{ |
| 625 |
|
log_error("section_count reach limit %d >= %d\n", p_section_list_pool->section_count, BBS_max_section); |
| 626 |
return NULL; |
return NULL; |
| 627 |
} |
} |
| 628 |
|
|
| 629 |
p_section = p_section_list_pool + section_list_count; |
sid_to_str(sid, sid_str); |
| 630 |
|
|
| 631 |
|
p_section = p_section_list_pool->sections + p_section_list_pool->section_count; |
| 632 |
|
|
| 633 |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
p_section->sid = sid; |
| 634 |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
p_section->ex_menu_tm = 0; |
| 635 |
|
|
| 636 |
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle - 1)); |
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1); |
| 637 |
p_section->stitle[sizeof(p_section->stitle - 1)] = '\0'; |
p_section->sname[sizeof(p_section->sname) - 1] = '\0'; |
| 638 |
|
|
| 639 |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle) - 1); |
| 640 |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
p_section->stitle[sizeof(p_section->stitle) - 1] = '\0'; |
| 641 |
|
|
| 642 |
if (trie_dict_set(p_trie_dict_section_list, sname, section_list_count) != 1) |
strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1); |
| 643 |
|
p_section->master_list[sizeof(p_section->master_list) - 1] = '\0'; |
| 644 |
|
|
| 645 |
|
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, p_section_list_pool->section_count) != 1) |
| 646 |
{ |
{ |
| 647 |
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, p_section_list_pool->section_count); |
| 648 |
|
return NULL; |
| 649 |
|
} |
| 650 |
|
|
| 651 |
|
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_sid, sid_str, p_section_list_pool->section_count) != 1) |
| 652 |
|
{ |
| 653 |
|
log_error("trie_dict_set(section, %d, %d) error\n", sid, p_section_list_pool->section_count); |
| 654 |
return NULL; |
return NULL; |
| 655 |
} |
} |
| 656 |
|
|
| 657 |
section_list_reset_articles(p_section); |
section_list_reset_articles(p_section); |
| 658 |
|
|
| 659 |
section_list_count++; |
p_section_list_pool->section_count++; |
| 660 |
|
|
| 661 |
return p_section; |
return p_section; |
| 662 |
} |
} |
| 663 |
|
|
| 664 |
|
int section_list_update(SECTION_LIST *p_section, const char *sname, const char *stitle, const char *master_list) |
| 665 |
|
{ |
| 666 |
|
int64_t index; |
| 667 |
|
|
| 668 |
|
if (p_section == NULL || sname == NULL || stitle == NULL || master_list == NULL) |
| 669 |
|
{ |
| 670 |
|
log_error("NULL pointer error\n"); |
| 671 |
|
return -1; |
| 672 |
|
} |
| 673 |
|
|
| 674 |
|
index = get_section_index(p_section); |
| 675 |
|
|
| 676 |
|
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1); |
| 677 |
|
p_section->sname[sizeof(p_section->sname) - 1] = '\0'; |
| 678 |
|
|
| 679 |
|
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle) - 1); |
| 680 |
|
p_section->stitle[sizeof(p_section->stitle) - 1] = '\0'; |
| 681 |
|
|
| 682 |
|
strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1); |
| 683 |
|
p_section->master_list[sizeof(p_section->master_list) - 1] = '\0'; |
| 684 |
|
|
| 685 |
|
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, index) < 0) |
| 686 |
|
{ |
| 687 |
|
log_error("trie_dict_set(section, %s, %d) error\n", sname, index); |
| 688 |
|
return -2; |
| 689 |
|
} |
| 690 |
|
|
| 691 |
|
return 0; |
| 692 |
|
} |
| 693 |
|
|
| 694 |
void section_list_reset_articles(SECTION_LIST *p_section) |
void section_list_reset_articles(SECTION_LIST *p_section) |
| 695 |
{ |
{ |
| 696 |
p_section->article_count = 0; |
p_section->article_count = 0; |
| 702 |
|
|
| 703 |
p_section->page_count = 0; |
p_section->page_count = 0; |
| 704 |
p_section->last_page_visible_article_count = 0; |
p_section->last_page_visible_article_count = 0; |
| 705 |
|
|
| 706 |
|
p_section->ontop_article_count = 0; |
| 707 |
} |
} |
| 708 |
|
|
| 709 |
void section_list_cleanup(void) |
SECTION_LIST *section_list_find_by_name(const char *sname) |
| 710 |
{ |
{ |
| 711 |
if (p_trie_dict_section_list != NULL) |
int64_t index; |
| 712 |
|
int ret; |
| 713 |
|
|
| 714 |
|
if (p_section_list_pool == NULL) |
| 715 |
{ |
{ |
| 716 |
trie_dict_destroy(p_trie_dict_section_list); |
log_error("section_list not initialized\n"); |
| 717 |
p_trie_dict_section_list = NULL; |
return NULL; |
| 718 |
} |
} |
| 719 |
|
|
| 720 |
if (p_section_list_pool != NULL) |
ret = trie_dict_get(p_section_list_pool->p_trie_dict_section_by_name, sname, &index); |
| 721 |
|
if (ret < 0) |
| 722 |
{ |
{ |
| 723 |
free(p_section_list_pool); |
log_error("trie_dict_get(section, %s) error\n", sname); |
| 724 |
p_section_list_pool = NULL; |
return NULL; |
| 725 |
|
} |
| 726 |
|
else if (ret == 0) |
| 727 |
|
{ |
| 728 |
|
return NULL; |
| 729 |
} |
} |
| 730 |
|
|
| 731 |
section_list_count = 0; |
return (p_section_list_pool->sections + index); |
| 732 |
} |
} |
| 733 |
|
|
| 734 |
SECTION_LIST *section_list_find_by_name(const char *sname) |
SECTION_LIST *section_list_find_by_sid(int32_t sid) |
| 735 |
{ |
{ |
| 736 |
int64_t index; |
int64_t index; |
| 737 |
|
int ret; |
| 738 |
|
char sid_str[SID_STR_LEN]; |
| 739 |
|
|
| 740 |
if (p_section_list_pool == NULL || p_trie_dict_section_list == NULL) |
if (p_section_list_pool == NULL) |
| 741 |
{ |
{ |
| 742 |
log_error("section_list not initialized\n"); |
log_error("section_list not initialized\n"); |
| 743 |
return NULL; |
return NULL; |
| 744 |
} |
} |
| 745 |
|
|
| 746 |
if (trie_dict_get(p_trie_dict_section_list, sname, &index) != 1) |
sid_to_str(sid, sid_str); |
| 747 |
|
|
| 748 |
|
ret = trie_dict_get(p_section_list_pool->p_trie_dict_section_by_sid, sid_str, &index); |
| 749 |
|
if (ret < 0) |
| 750 |
|
{ |
| 751 |
|
log_error("trie_dict_get(section, %d) error\n", sid); |
| 752 |
|
return NULL; |
| 753 |
|
} |
| 754 |
|
else if (ret == 0) |
| 755 |
{ |
{ |
|
log_error("trie_dict_get(section_data, %s) error\n", sname); |
|
| 756 |
return NULL; |
return NULL; |
| 757 |
} |
} |
| 758 |
|
|
| 759 |
return (p_section_list_pool + index); |
return (p_section_list_pool->sections + index); |
| 760 |
} |
} |
| 761 |
|
|
| 762 |
int section_list_append_article(SECTION_LIST *p_section, const ARTICLE *p_article_src) |
int section_list_append_article(SECTION_LIST *p_section, const ARTICLE *p_article_src) |
| 769 |
|
|
| 770 |
if (p_section == NULL || p_article_src == NULL) |
if (p_section == NULL || p_article_src == NULL) |
| 771 |
{ |
{ |
| 772 |
log_error("section_list_append_article() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 773 |
return -1; |
return -1; |
| 774 |
} |
} |
| 775 |
|
|
| 779 |
return -1; |
return -1; |
| 780 |
} |
} |
| 781 |
|
|
| 782 |
|
if (p_section->sid != p_article_src->sid) |
| 783 |
|
{ |
| 784 |
|
log_error("section_list_append_article() error: section sid %d != article sid %d\n", p_section->sid, p_article_src->sid); |
| 785 |
|
return -2; |
| 786 |
|
} |
| 787 |
|
|
| 788 |
if (p_section->article_count >= BBS_article_limit_per_section) |
if (p_section->article_count >= BBS_article_limit_per_section) |
| 789 |
{ |
{ |
| 790 |
log_error("section_list_append_article() error: article_count reach limit in section %d\n", p_section->sid); |
log_error("section_list_append_article() error: article_count reach limit in section %d\n", p_section->sid); |
| 792 |
} |
} |
| 793 |
|
|
| 794 |
if (p_article_block_pool->block_count == 0 || |
if (p_article_block_pool->block_count == 0 || |
| 795 |
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 >= BBS_article_count_per_block) |
| 796 |
{ |
{ |
| 797 |
if ((p_block = pop_free_article_block()) == NULL) |
if ((p_block = pop_free_article_block()) == NULL) |
| 798 |
{ |
{ |
| 802 |
|
|
| 803 |
if (p_article_block_pool->block_count > 0) |
if (p_article_block_pool->block_count > 0) |
| 804 |
{ |
{ |
| 805 |
last_aid = p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->articles[ARTICLE_PER_BLOCK - 1].aid; |
last_aid = p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->articles[BBS_article_count_per_block - 1].aid; |
| 806 |
} |
} |
| 807 |
|
|
| 808 |
p_article_block_pool->p_block[p_article_block_pool->block_count] = p_block; |
p_article_block_pool->p_block[p_article_block_pool->block_count] = p_block; |
| 817 |
// AID of articles should be strictly ascending |
// AID of articles should be strictly ascending |
| 818 |
if (p_article_src->aid <= last_aid) |
if (p_article_src->aid <= last_aid) |
| 819 |
{ |
{ |
| 820 |
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); |
| 821 |
return -3; |
return -3; |
| 822 |
} |
} |
| 823 |
|
|
| 881 |
p_section->p_article_tail = p_article; |
p_section->p_article_tail = p_article; |
| 882 |
|
|
| 883 |
// Update page |
// Update page |
| 884 |
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) || |
| 885 |
|
p_section->page_count == 0) |
| 886 |
{ |
{ |
| 887 |
p_section->p_page_first_article[p_section->page_count] = p_article; |
p_section->p_page_first_article[p_section->page_count] = p_article; |
| 888 |
p_section->page_count++; |
p_section->page_count++; |
| 894 |
p_section->last_page_visible_article_count++; |
p_section->last_page_visible_article_count++; |
| 895 |
} |
} |
| 896 |
|
|
| 897 |
|
if (p_article->ontop && section_list_update_article_ontop(p_section, p_article) < 0) |
| 898 |
|
{ |
| 899 |
|
log_error("section_list_update_article_ontop(sid=%d, aid=%d) error\n", |
| 900 |
|
p_section->sid, p_article->aid); |
| 901 |
|
return -5; |
| 902 |
|
} |
| 903 |
|
|
| 904 |
return 0; |
return 0; |
| 905 |
} |
} |
| 906 |
|
|
| 912 |
|
|
| 913 |
if (p_section == NULL) |
if (p_section == NULL) |
| 914 |
{ |
{ |
| 915 |
log_error("section_list_set_article_visible() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 916 |
return -2; |
return -1; |
| 917 |
} |
} |
| 918 |
|
|
| 919 |
p_article = article_block_find_by_aid(aid); |
p_article = article_block_find_by_aid(aid); |
| 922 |
return -1; // Not found |
return -1; // Not found |
| 923 |
} |
} |
| 924 |
|
|
| 925 |
|
if (p_section->sid != p_article->sid) |
| 926 |
|
{ |
| 927 |
|
log_error("Inconsistent section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
| 928 |
|
return -2; |
| 929 |
|
} |
| 930 |
|
|
| 931 |
if (p_article->visible == visible) |
if (p_article->visible == visible) |
| 932 |
{ |
{ |
| 933 |
return 0; // Already set |
return 0; // Already set |
| 937 |
{ |
{ |
| 938 |
p_section->visible_article_count--; |
p_section->visible_article_count--; |
| 939 |
|
|
| 940 |
|
if (user_article_cnt_inc(p_article->uid, -1) < 0) |
| 941 |
|
{ |
| 942 |
|
log_error("user_article_cnt_inc(uid=%d, -1) error\n", p_article->uid); |
| 943 |
|
} |
| 944 |
|
|
| 945 |
if (p_article->tid == 0) |
if (p_article->tid == 0) |
| 946 |
{ |
{ |
| 947 |
p_section->visible_topic_count--; |
p_section->visible_topic_count--; |
| 960 |
p_reply->visible = 0; |
p_reply->visible = 0; |
| 961 |
p_section->visible_article_count--; |
p_section->visible_article_count--; |
| 962 |
affected_count++; |
affected_count++; |
| 963 |
|
|
| 964 |
|
if (user_article_cnt_inc(p_reply->uid, -1) < 0) |
| 965 |
|
{ |
| 966 |
|
log_error("user_article_cnt_inc(uid=%d, -1) error\n", p_reply->uid); |
| 967 |
|
} |
| 968 |
} |
} |
| 969 |
} |
} |
| 970 |
} |
} |
| 977 |
{ |
{ |
| 978 |
p_section->visible_topic_count++; |
p_section->visible_topic_count++; |
| 979 |
} |
} |
| 980 |
|
|
| 981 |
|
if (user_article_cnt_inc(p_article->uid, 1) < 0) |
| 982 |
|
{ |
| 983 |
|
log_error("user_article_cnt_inc(uid=%d, 1) error\n", p_article->uid); |
| 984 |
|
} |
| 985 |
} |
} |
| 986 |
|
|
| 987 |
p_article->visible = visible; |
p_article->visible = visible; |
| 990 |
return affected_count; |
return affected_count; |
| 991 |
} |
} |
| 992 |
|
|
| 993 |
ARTICLE *section_list_find_article_with_offset(SECTION_LIST *p_section, int32_t aid, int32_t *p_page, int32_t *p_offset) |
int section_list_update_article_ontop(SECTION_LIST *p_section, ARTICLE *p_article) |
| 994 |
|
{ |
| 995 |
|
int i; |
| 996 |
|
|
| 997 |
|
if (p_section == NULL || p_article == NULL) |
| 998 |
|
{ |
| 999 |
|
log_error("NULL pointer error\n"); |
| 1000 |
|
return -1; |
| 1001 |
|
} |
| 1002 |
|
|
| 1003 |
|
if (p_section->sid != p_article->sid) |
| 1004 |
|
{ |
| 1005 |
|
log_error("Inconsistent section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
| 1006 |
|
return -2; |
| 1007 |
|
} |
| 1008 |
|
|
| 1009 |
|
if (p_article->ontop) |
| 1010 |
|
{ |
| 1011 |
|
for (i = 0; i < p_section->ontop_article_count; i++) |
| 1012 |
|
{ |
| 1013 |
|
if (p_section->p_ontop_articles[i]->aid == p_article->aid) |
| 1014 |
|
{ |
| 1015 |
|
log_error("Inconsistent state found: article %d already ontop in section %d\n", p_article->aid, p_section->sid); |
| 1016 |
|
return 0; |
| 1017 |
|
} |
| 1018 |
|
else if (p_section->p_ontop_articles[i]->aid > p_article->aid) |
| 1019 |
|
{ |
| 1020 |
|
break; |
| 1021 |
|
} |
| 1022 |
|
} |
| 1023 |
|
|
| 1024 |
|
// Remove the oldest one if the array of ontop articles is full |
| 1025 |
|
if (p_section->ontop_article_count >= BBS_ontop_article_limit_per_section) |
| 1026 |
|
{ |
| 1027 |
|
if (i == 0) // p_article is the oldest one |
| 1028 |
|
{ |
| 1029 |
|
return 0; |
| 1030 |
|
} |
| 1031 |
|
memmove((void *)(p_section->p_ontop_articles), |
| 1032 |
|
(void *)(p_section->p_ontop_articles + 1), |
| 1033 |
|
sizeof(ARTICLE *) * (size_t)(i - 1)); |
| 1034 |
|
p_section->ontop_article_count--; |
| 1035 |
|
i--; |
| 1036 |
|
} |
| 1037 |
|
else |
| 1038 |
|
{ |
| 1039 |
|
memmove((void *)(p_section->p_ontop_articles + i + 1), |
| 1040 |
|
(void *)(p_section->p_ontop_articles + i), |
| 1041 |
|
sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i)); |
| 1042 |
|
} |
| 1043 |
|
|
| 1044 |
|
p_section->p_ontop_articles[i] = p_article; |
| 1045 |
|
p_section->ontop_article_count++; |
| 1046 |
|
|
| 1047 |
|
// TODO: debug |
| 1048 |
|
} |
| 1049 |
|
else // ontop == 0 |
| 1050 |
|
{ |
| 1051 |
|
for (i = 0; i < p_section->ontop_article_count; i++) |
| 1052 |
|
{ |
| 1053 |
|
if (p_section->p_ontop_articles[i]->aid == p_article->aid) |
| 1054 |
|
{ |
| 1055 |
|
break; |
| 1056 |
|
} |
| 1057 |
|
} |
| 1058 |
|
if (i == p_section->ontop_article_count) // not found |
| 1059 |
|
{ |
| 1060 |
|
log_error("Inconsistent state found: article %d not ontop in section %d\n", p_article->aid, p_section->sid); |
| 1061 |
|
return 0; |
| 1062 |
|
} |
| 1063 |
|
|
| 1064 |
|
memmove((void *)(p_section->p_ontop_articles + i), |
| 1065 |
|
(void *)(p_section->p_ontop_articles + i + 1), |
| 1066 |
|
sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i - 1)); |
| 1067 |
|
p_section->ontop_article_count--; |
| 1068 |
|
} |
| 1069 |
|
|
| 1070 |
|
return 0; |
| 1071 |
|
} |
| 1072 |
|
|
| 1073 |
|
int section_list_page_count_with_ontop(SECTION_LIST *p_section) |
| 1074 |
|
{ |
| 1075 |
|
int page_count; |
| 1076 |
|
|
| 1077 |
|
if (p_section == NULL) |
| 1078 |
|
{ |
| 1079 |
|
log_error("NULL pointer error\n"); |
| 1080 |
|
return -1; |
| 1081 |
|
} |
| 1082 |
|
|
| 1083 |
|
page_count = p_section->page_count - 1 + |
| 1084 |
|
(p_section->last_page_visible_article_count + p_section->ontop_article_count + BBS_article_limit_per_page - 1) / |
| 1085 |
|
BBS_article_limit_per_page; |
| 1086 |
|
|
| 1087 |
|
if (page_count < 0) |
| 1088 |
|
{ |
| 1089 |
|
page_count = 0; |
| 1090 |
|
} |
| 1091 |
|
|
| 1092 |
|
return page_count; |
| 1093 |
|
} |
| 1094 |
|
|
| 1095 |
|
int section_list_page_article_count_with_ontop(SECTION_LIST *p_section, int32_t page_id) |
| 1096 |
|
{ |
| 1097 |
|
if (p_section == NULL) |
| 1098 |
|
{ |
| 1099 |
|
log_error("NULL pointer error\n"); |
| 1100 |
|
return -1; |
| 1101 |
|
} |
| 1102 |
|
|
| 1103 |
|
if (page_id < p_section->page_count - 1) |
| 1104 |
|
{ |
| 1105 |
|
return BBS_article_limit_per_page; |
| 1106 |
|
} |
| 1107 |
|
else // if (page_id >= p_section->page_count - 1) |
| 1108 |
|
{ |
| 1109 |
|
return MIN(MAX(0, |
| 1110 |
|
(p_section->last_page_visible_article_count + p_section->ontop_article_count - |
| 1111 |
|
BBS_article_limit_per_page * (page_id - p_section->page_count + 1))), |
| 1112 |
|
BBS_article_limit_per_page); |
| 1113 |
|
} |
| 1114 |
|
} |
| 1115 |
|
|
| 1116 |
|
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) |
| 1117 |
{ |
{ |
| 1118 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 1119 |
int left; |
int left; |
| 1122 |
|
|
| 1123 |
*p_page = -1; |
*p_page = -1; |
| 1124 |
*p_offset = -1; |
*p_offset = -1; |
| 1125 |
|
*pp_next = NULL; |
| 1126 |
|
|
| 1127 |
if (p_section == NULL) |
if (p_section == NULL) |
| 1128 |
{ |
{ |
| 1129 |
log_error("section_list_find_article_with_offset() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1130 |
return NULL; |
return NULL; |
| 1131 |
} |
} |
| 1132 |
|
|
| 1138 |
} |
} |
| 1139 |
|
|
| 1140 |
left = 0; |
left = 0; |
| 1141 |
right = p_section->page_count; |
right = p_section->page_count - 1; |
| 1142 |
|
|
| 1143 |
// aid in the range [ head aid of pages[left], tail aid of pages[right - 1] ] |
// aid in the range [ head aid of pages[left], tail aid of pages[right] ] |
| 1144 |
while (left < right - 1) |
while (left < right) |
| 1145 |
{ |
{ |
| 1146 |
// get page id no less than mid value of left page id and right page id |
// get page id no less than mid value of left page id and right page id |
| 1147 |
mid = (left + right) / 2 + (right - left) % 2; |
mid = (left + right) / 2 + (left + right) % 2; |
|
|
|
|
if (mid >= p_section->page_count) |
|
|
{ |
|
|
log_error("page id (mid = %d) is out of boundary\n", mid); |
|
|
return NULL; |
|
|
} |
|
| 1148 |
|
|
| 1149 |
if (aid < p_section->p_page_first_article[mid]->aid) |
if (aid < p_section->p_page_first_article[mid]->aid) |
| 1150 |
{ |
{ |
| 1151 |
right = mid; |
right = mid - 1; |
| 1152 |
} |
} |
| 1153 |
else |
else // if (aid < p_section->p_page_first_article[mid]->aid) |
| 1154 |
{ |
{ |
| 1155 |
left = mid; |
left = mid; |
| 1156 |
} |
} |
| 1161 |
p_article = p_section->p_page_first_article[*p_page]; |
p_article = p_section->p_page_first_article[*p_page]; |
| 1162 |
|
|
| 1163 |
// 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 |
| 1164 |
right = (*p_page == MAX(1, 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); |
| 1165 |
|
|
| 1166 |
// left will be the offset of article found or offset to insert |
// left will be the offset of article found or offset to insert |
| 1167 |
left = 0; |
left = 0; |
| 1168 |
|
|
| 1169 |
while (aid > p_article->aid) |
while (aid > p_article->aid) |
| 1170 |
{ |
{ |
|
// aid > p_article->aid |
|
| 1171 |
p_article = p_article->p_next; |
p_article = p_article->p_next; |
| 1172 |
left++; |
left++; |
| 1173 |
|
|
| 1174 |
|
if (aid == p_article->aid) |
| 1175 |
|
{ |
| 1176 |
|
*pp_next = p_article->p_next; |
| 1177 |
|
break; |
| 1178 |
|
} |
| 1179 |
|
|
| 1180 |
// over last article in the page |
// over last article in the page |
| 1181 |
if (p_article == p_section->p_article_head || p_article->aid >= right) |
if (p_article == p_section->p_article_head || p_article->aid >= right) |
| 1182 |
{ |
{ |
| 1183 |
break; |
*pp_next = (p_article == p_section->p_article_head ? p_section->p_article_head : p_section->p_page_first_article[*p_page + 1]); |
| 1184 |
|
*p_offset = left; |
| 1185 |
|
return NULL; // not found |
| 1186 |
} |
} |
| 1187 |
} |
} |
| 1188 |
|
|
| 1189 |
if (aid != p_article->aid) // not exist |
if (aid < p_article->aid) |
| 1190 |
{ |
{ |
| 1191 |
p_article = NULL; |
*pp_next = p_article; |
| 1192 |
|
p_article = NULL; // not found |
| 1193 |
|
} |
| 1194 |
|
else // aid == p_article->aid |
| 1195 |
|
{ |
| 1196 |
|
*pp_next = p_article->p_next; |
| 1197 |
} |
} |
| 1198 |
|
|
| 1199 |
*p_offset = left; |
*p_offset = left; |
| 1204 |
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) |
| 1205 |
{ |
{ |
| 1206 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 1207 |
|
ARTICLE *p_next; |
| 1208 |
int32_t page; |
int32_t page; |
| 1209 |
int32_t offset; |
int32_t offset; |
| 1210 |
int visible_article_count; |
int visible_article_count; |
| 1212 |
|
|
| 1213 |
if (p_section == NULL) |
if (p_section == NULL) |
| 1214 |
{ |
{ |
| 1215 |
log_error("section_list_calculate_page() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1216 |
return -1; |
return -1; |
| 1217 |
} |
} |
| 1218 |
|
|
| 1219 |
p_article = section_list_find_article_with_offset(p_section, start_aid, &page, &offset); |
if (p_section->article_count == 0) // empty |
| 1220 |
if (p_article == NULL) |
{ |
| 1221 |
|
p_section->page_count = 0; |
| 1222 |
|
p_section->last_page_visible_article_count = 0; |
| 1223 |
|
|
| 1224 |
|
return 0; |
| 1225 |
|
} |
| 1226 |
|
|
| 1227 |
|
if (start_aid > 0) |
| 1228 |
{ |
{ |
| 1229 |
if (page < 0) |
p_article = article_block_find_by_aid(start_aid); |
| 1230 |
|
if (p_article == NULL) |
| 1231 |
{ |
{ |
| 1232 |
return 0; |
return -1; // Not found |
| 1233 |
} |
} |
| 1234 |
|
|
| 1235 |
log_error("section_list_calculate_page() aid = %d not found in section sid = %d\n", start_aid, p_section->sid); |
if (p_section->sid != p_article->sid) |
| 1236 |
} |
{ |
| 1237 |
|
log_error("section_list_calculate_page() error: section sid %d != start article sid %d\n", p_section->sid, p_article->sid); |
| 1238 |
|
return -2; |
| 1239 |
|
} |
| 1240 |
|
|
| 1241 |
if (offset > 0) |
p_article = section_list_find_article_with_offset(p_section, start_aid, &page, &offset, &p_next); |
| 1242 |
|
if (p_article == NULL) |
| 1243 |
|
{ |
| 1244 |
|
if (page < 0) |
| 1245 |
|
{ |
| 1246 |
|
return -1; |
| 1247 |
|
} |
| 1248 |
|
log_error("section_list_calculate_page() aid = %d not found in section sid = %d\n", |
| 1249 |
|
start_aid, p_section->sid); |
| 1250 |
|
return -2; |
| 1251 |
|
} |
| 1252 |
|
|
| 1253 |
|
if (offset > 0) |
| 1254 |
|
{ |
| 1255 |
|
p_article = p_section->p_page_first_article[page]; |
| 1256 |
|
} |
| 1257 |
|
} |
| 1258 |
|
else |
| 1259 |
{ |
{ |
| 1260 |
p_article = p_section->p_page_first_article[page]; |
p_article = p_section->p_article_head; |
| 1261 |
|
page = 0; |
| 1262 |
|
offset = 0; |
| 1263 |
} |
} |
| 1264 |
|
|
| 1265 |
visible_article_count = 0; |
visible_article_count = 0; |
| 1301 |
} while (p_article != p_section->p_article_head); |
} while (p_article != p_section->p_article_head); |
| 1302 |
|
|
| 1303 |
p_section->page_count = page + (visible_article_count > 0 ? 1 : 0); |
p_section->page_count = page + (visible_article_count > 0 ? 1 : 0); |
| 1304 |
p_section->last_page_visible_article_count = visible_article_count; |
p_section->last_page_visible_article_count = (visible_article_count > 0 |
| 1305 |
|
? visible_article_count |
| 1306 |
|
: (page > 0 ? BBS_article_limit_per_page : 0)); |
| 1307 |
|
|
| 1308 |
|
return 0; |
| 1309 |
|
} |
| 1310 |
|
|
| 1311 |
|
int32_t article_block_last_aid(void) |
| 1312 |
|
{ |
| 1313 |
|
ARTICLE_BLOCK *p_block = p_article_block_pool->p_block[p_article_block_pool->block_count - 1]; |
| 1314 |
|
int32_t last_aid = p_block->articles[p_block->article_count - 1].aid; |
| 1315 |
|
|
| 1316 |
|
return last_aid; |
| 1317 |
|
} |
| 1318 |
|
|
| 1319 |
|
int article_block_article_count(void) |
| 1320 |
|
{ |
| 1321 |
|
int ret; |
| 1322 |
|
|
| 1323 |
|
if (p_article_block_pool == NULL || p_article_block_pool->block_count <= 0) |
| 1324 |
|
{ |
| 1325 |
|
return -1; |
| 1326 |
|
} |
| 1327 |
|
|
| 1328 |
|
ret = (p_article_block_pool->block_count - 1) * BBS_article_count_per_block + |
| 1329 |
|
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count; |
| 1330 |
|
|
| 1331 |
|
return ret; |
| 1332 |
|
} |
| 1333 |
|
|
| 1334 |
|
int article_count_of_topic(int32_t aid) |
| 1335 |
|
{ |
| 1336 |
|
ARTICLE *p_article; |
| 1337 |
|
int article_count; |
| 1338 |
|
|
| 1339 |
|
p_article = article_block_find_by_aid(aid); |
| 1340 |
|
if (p_article == NULL) |
| 1341 |
|
{ |
| 1342 |
|
return 0; // Not found |
| 1343 |
|
} |
| 1344 |
|
|
| 1345 |
|
article_count = 0; |
| 1346 |
|
|
| 1347 |
|
do |
| 1348 |
|
{ |
| 1349 |
|
if (p_article->tid != 0 && p_article->tid != aid) |
| 1350 |
|
{ |
| 1351 |
|
log_error("article_count_of_topic(%d) error: article %d not linked to the topic\n", aid, p_article->aid); |
| 1352 |
|
break; |
| 1353 |
|
} |
| 1354 |
|
|
| 1355 |
|
article_count++; |
| 1356 |
|
p_article = p_article->p_topic_next; |
| 1357 |
|
} while (p_article->aid != aid); |
| 1358 |
|
|
| 1359 |
|
return article_count; |
| 1360 |
|
} |
| 1361 |
|
|
| 1362 |
|
int section_list_move_topic(SECTION_LIST *p_section_src, SECTION_LIST *p_section_dest, int32_t aid) |
| 1363 |
|
{ |
| 1364 |
|
ARTICLE *p_article; |
| 1365 |
|
ARTICLE *p_next; |
| 1366 |
|
int32_t page; |
| 1367 |
|
int32_t offset; |
| 1368 |
|
int32_t move_article_count; |
| 1369 |
|
int32_t dest_article_count_old; |
| 1370 |
|
int32_t last_unaffected_aid_src; |
| 1371 |
|
int32_t first_inserted_aid_dest; |
| 1372 |
|
int move_counter; |
| 1373 |
|
|
| 1374 |
|
if (p_section_src == NULL || p_section_dest == NULL) |
| 1375 |
|
{ |
| 1376 |
|
log_error("NULL pointer error\n"); |
| 1377 |
|
return -1; |
| 1378 |
|
} |
| 1379 |
|
|
| 1380 |
|
if (p_section_src->sid == p_section_dest->sid) |
| 1381 |
|
{ |
| 1382 |
|
log_error("section_list_move_topic() src and dest section are the same\n"); |
| 1383 |
|
return -1; |
| 1384 |
|
} |
| 1385 |
|
|
| 1386 |
|
if ((p_article = article_block_find_by_aid(aid)) == NULL) |
| 1387 |
|
{ |
| 1388 |
|
log_error("article_block_find_by_aid(aid = %d) error: article not found\n", aid); |
| 1389 |
|
return -2; |
| 1390 |
|
} |
| 1391 |
|
|
| 1392 |
|
if (p_section_src->sid != p_article->sid) |
| 1393 |
|
{ |
| 1394 |
|
log_error("section_list_move_topic() error: src section sid %d != article %d sid %d\n", |
| 1395 |
|
p_section_src->sid, p_article->aid, p_article->sid); |
| 1396 |
|
return -2; |
| 1397 |
|
} |
| 1398 |
|
|
| 1399 |
|
if (p_article->tid != 0) |
| 1400 |
|
{ |
| 1401 |
|
log_error("section_list_move_topic(aid = %d) error: article is not head of topic, tid = %d\n", aid, p_article->tid); |
| 1402 |
|
return -2; |
| 1403 |
|
} |
| 1404 |
|
|
| 1405 |
|
last_unaffected_aid_src = (p_article == p_section_src->p_article_head ? 0 : p_article->p_prior->aid); |
| 1406 |
|
|
| 1407 |
|
move_article_count = article_count_of_topic(aid); |
| 1408 |
|
if (move_article_count <= 0) |
| 1409 |
|
{ |
| 1410 |
|
log_error("article_count_of_topic(aid = %d) <= 0\n", aid); |
| 1411 |
|
return -2; |
| 1412 |
|
} |
| 1413 |
|
|
| 1414 |
|
if (p_section_dest->article_count + move_article_count > BBS_article_limit_per_section) |
| 1415 |
|
{ |
| 1416 |
|
log_error("section_list_move_topic() error: article_count %d reach limit in section %d\n", |
| 1417 |
|
p_section_dest->article_count + move_article_count, p_section_dest->sid); |
| 1418 |
|
return -3; |
| 1419 |
|
} |
| 1420 |
|
|
| 1421 |
|
dest_article_count_old = p_section_dest->article_count; |
| 1422 |
|
move_counter = 0; |
| 1423 |
|
first_inserted_aid_dest = p_article->aid; |
| 1424 |
|
|
| 1425 |
|
do |
| 1426 |
|
{ |
| 1427 |
|
if (p_section_src->sid != p_article->sid) |
| 1428 |
|
{ |
| 1429 |
|
log_error("section_list_move_topic() warning: src section sid %d != article %d sid %d\n", |
| 1430 |
|
p_section_src->sid, p_article->aid, p_article->sid); |
| 1431 |
|
p_article = p_article->p_topic_next; |
| 1432 |
|
continue; |
| 1433 |
|
} |
| 1434 |
|
|
| 1435 |
|
// Remove from bi-directional article list of src section |
| 1436 |
|
if (p_section_src->p_article_head == p_article) |
| 1437 |
|
{ |
| 1438 |
|
p_section_src->p_article_head = p_article->p_next; |
| 1439 |
|
} |
| 1440 |
|
if (p_section_src->p_article_tail == p_article) |
| 1441 |
|
{ |
| 1442 |
|
p_section_src->p_article_tail = p_article->p_prior; |
| 1443 |
|
} |
| 1444 |
|
if (p_section_src->p_article_head == p_article) // || p_section_src->p_article_tail == p_article |
| 1445 |
|
{ |
| 1446 |
|
p_section_src->p_article_head = NULL; |
| 1447 |
|
p_section_src->p_article_tail = NULL; |
| 1448 |
|
} |
| 1449 |
|
|
| 1450 |
|
p_article->p_prior->p_next = p_article->p_next; |
| 1451 |
|
p_article->p_next->p_prior = p_article->p_prior; |
| 1452 |
|
|
| 1453 |
|
// Update sid of article |
| 1454 |
|
p_article->sid = p_section_dest->sid; |
| 1455 |
|
|
| 1456 |
|
if (section_list_find_article_with_offset(p_section_dest, p_article->aid, &page, &offset, &p_next) != NULL) |
| 1457 |
|
{ |
| 1458 |
|
log_error("section_list_move_topic() warning: article %d already in section %d\n", p_article->aid, p_section_dest->sid); |
| 1459 |
|
p_article = p_article->p_topic_next; |
| 1460 |
|
continue; |
| 1461 |
|
} |
| 1462 |
|
|
| 1463 |
|
// Insert into bi-directional article list of dest section |
| 1464 |
|
if (p_next == NULL) // empty section |
| 1465 |
|
{ |
| 1466 |
|
p_section_dest->p_article_head = p_article; |
| 1467 |
|
p_section_dest->p_article_tail = p_article; |
| 1468 |
|
p_article->p_prior = p_article; |
| 1469 |
|
p_article->p_next = p_article; |
| 1470 |
|
} |
| 1471 |
|
else |
| 1472 |
|
{ |
| 1473 |
|
if (p_section_dest->p_article_head == p_next) |
| 1474 |
|
{ |
| 1475 |
|
if (p_article->aid < p_next->aid) |
| 1476 |
|
{ |
| 1477 |
|
p_section_dest->p_article_head = p_article; |
| 1478 |
|
} |
| 1479 |
|
else // p_article->aid > p_next->aid |
| 1480 |
|
{ |
| 1481 |
|
p_section_dest->p_article_tail = p_article; |
| 1482 |
|
} |
| 1483 |
|
} |
| 1484 |
|
|
| 1485 |
|
p_article->p_prior = p_next->p_prior; |
| 1486 |
|
p_article->p_next = p_next; |
| 1487 |
|
p_next->p_prior->p_next = p_article; |
| 1488 |
|
p_next->p_prior = p_article; |
| 1489 |
|
} |
| 1490 |
|
|
| 1491 |
|
// Update article / topic counter of src / desc section |
| 1492 |
|
p_section_src->article_count--; |
| 1493 |
|
p_section_dest->article_count++; |
| 1494 |
|
if (p_article->tid == 0) |
| 1495 |
|
{ |
| 1496 |
|
p_section_src->topic_count--; |
| 1497 |
|
p_section_dest->topic_count++; |
| 1498 |
|
} |
| 1499 |
|
|
| 1500 |
|
// Update visible article / topic counter of src / desc section |
| 1501 |
|
if (p_article->visible) |
| 1502 |
|
{ |
| 1503 |
|
p_section_src->visible_article_count--; |
| 1504 |
|
p_section_dest->visible_article_count++; |
| 1505 |
|
if (p_article->tid == 0) |
| 1506 |
|
{ |
| 1507 |
|
p_section_src->visible_topic_count--; |
| 1508 |
|
p_section_dest->visible_topic_count++; |
| 1509 |
|
} |
| 1510 |
|
} |
| 1511 |
|
|
| 1512 |
|
// Update page for empty dest section |
| 1513 |
|
if (p_section_dest->article_count == 1) |
| 1514 |
|
{ |
| 1515 |
|
p_section_dest->p_page_first_article[0] = p_article; |
| 1516 |
|
p_section_dest->page_count = 1; |
| 1517 |
|
p_section_dest->last_page_visible_article_count = (p_article->visible ? 1 : 0); |
| 1518 |
|
} |
| 1519 |
|
|
| 1520 |
|
p_article = p_article->p_topic_next; |
| 1521 |
|
|
| 1522 |
|
move_counter++; |
| 1523 |
|
if (move_counter % CALCULATE_PAGE_THRESHOLD == 0) |
| 1524 |
|
{ |
| 1525 |
|
// Re-calculate pages of desc section |
| 1526 |
|
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0) |
| 1527 |
|
{ |
| 1528 |
|
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n", |
| 1529 |
|
p_section_dest->sid, first_inserted_aid_dest); |
| 1530 |
|
} |
| 1531 |
|
|
| 1532 |
|
first_inserted_aid_dest = p_article->aid; |
| 1533 |
|
} |
| 1534 |
|
} while (p_article->aid != aid); |
| 1535 |
|
|
| 1536 |
|
if (p_section_dest->article_count - dest_article_count_old != move_article_count) |
| 1537 |
|
{ |
| 1538 |
|
log_error("section_list_move_topic() warning: count of moved articles %d != %d\n", |
| 1539 |
|
p_section_dest->article_count - dest_article_count_old, move_article_count); |
| 1540 |
|
} |
| 1541 |
|
|
| 1542 |
|
// Re-calculate pages of src section |
| 1543 |
|
if (section_list_calculate_page(p_section_src, last_unaffected_aid_src) < 0) |
| 1544 |
|
{ |
| 1545 |
|
log_error("section_list_calculate_page(src section = %d, aid = %d) error at aid = %d\n", |
| 1546 |
|
p_section_src->sid, last_unaffected_aid_src, aid); |
| 1547 |
|
} |
| 1548 |
|
|
| 1549 |
|
if (move_counter % CALCULATE_PAGE_THRESHOLD != 0) |
| 1550 |
|
{ |
| 1551 |
|
// Re-calculate pages of desc section |
| 1552 |
|
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0) |
| 1553 |
|
{ |
| 1554 |
|
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n", |
| 1555 |
|
p_section_dest->sid, first_inserted_aid_dest); |
| 1556 |
|
} |
| 1557 |
|
} |
| 1558 |
|
|
| 1559 |
|
return move_article_count; |
| 1560 |
|
} |
| 1561 |
|
|
| 1562 |
|
int get_section_index(SECTION_LIST *p_section) |
| 1563 |
|
{ |
| 1564 |
|
int index; |
| 1565 |
|
|
| 1566 |
|
if (p_section_list_pool == NULL) |
| 1567 |
|
{ |
| 1568 |
|
log_error("get_section_index() error: uninitialized\n"); |
| 1569 |
|
return -1; |
| 1570 |
|
} |
| 1571 |
|
|
| 1572 |
|
if (p_section == NULL) |
| 1573 |
|
{ |
| 1574 |
|
index = BBS_max_section; |
| 1575 |
|
} |
| 1576 |
|
else |
| 1577 |
|
{ |
| 1578 |
|
index = (int)(p_section - p_section_list_pool->sections); |
| 1579 |
|
if (index < 0 || index >= BBS_max_section) |
| 1580 |
|
{ |
| 1581 |
|
log_error("get_section_index(%d) error: index out of range\n", index); |
| 1582 |
|
return -2; |
| 1583 |
|
} |
| 1584 |
|
} |
| 1585 |
|
|
| 1586 |
|
return index; |
| 1587 |
|
} |
| 1588 |
|
|
| 1589 |
|
int get_section_info(SECTION_LIST *p_section, char *sname, char *stitle, char *master_list) |
| 1590 |
|
{ |
| 1591 |
|
if (p_section == NULL) |
| 1592 |
|
{ |
| 1593 |
|
log_error("NULL pointer error\n"); |
| 1594 |
|
return -1; |
| 1595 |
|
} |
| 1596 |
|
|
| 1597 |
|
if (section_list_rd_lock(p_section) < 0) |
| 1598 |
|
{ |
| 1599 |
|
log_error("section_list_rd_lock(sid=%d) error\n", p_section->sid); |
| 1600 |
|
return -2; |
| 1601 |
|
} |
| 1602 |
|
|
| 1603 |
|
if (sname != NULL) |
| 1604 |
|
{ |
| 1605 |
|
memcpy(sname, p_section->sname, sizeof(p_section->sname)); |
| 1606 |
|
} |
| 1607 |
|
if (stitle != NULL) |
| 1608 |
|
{ |
| 1609 |
|
memcpy(stitle, p_section->stitle, sizeof(p_section->stitle)); |
| 1610 |
|
} |
| 1611 |
|
if (master_list != NULL) |
| 1612 |
|
{ |
| 1613 |
|
memcpy(master_list, p_section->master_list, sizeof(p_section->master_list)); |
| 1614 |
|
} |
| 1615 |
|
|
| 1616 |
|
// release lock of section |
| 1617 |
|
if (section_list_rd_unlock(p_section) < 0) |
| 1618 |
|
{ |
| 1619 |
|
log_error("section_list_rd_unlock(sid=%d) error\n", p_section->sid); |
| 1620 |
|
return -2; |
| 1621 |
|
} |
| 1622 |
|
|
| 1623 |
return 0; |
return 0; |
| 1624 |
} |
} |
| 1625 |
|
|
| 1626 |
|
int section_list_try_rd_lock(SECTION_LIST *p_section, int wait_sec) |
| 1627 |
|
{ |
| 1628 |
|
int index; |
| 1629 |
|
struct sembuf sops[4]; |
| 1630 |
|
#if !defined(__CYGWIN__) |
| 1631 |
|
struct timespec timeout; |
| 1632 |
|
#endif |
| 1633 |
|
int ret; |
| 1634 |
|
|
| 1635 |
|
index = get_section_index(p_section); |
| 1636 |
|
if (index < 0) |
| 1637 |
|
{ |
| 1638 |
|
return -2; |
| 1639 |
|
} |
| 1640 |
|
|
| 1641 |
|
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1642 |
|
sops[0].sem_op = 0; // wait until unlocked |
| 1643 |
|
sops[0].sem_flg = 0; |
| 1644 |
|
|
| 1645 |
|
sops[1].sem_num = (unsigned short)(index * 2); // r_sem of section index |
| 1646 |
|
sops[1].sem_op = 1; // lock |
| 1647 |
|
sops[1].sem_flg = SEM_UNDO; // undo on terminate |
| 1648 |
|
|
| 1649 |
|
// Read lock on any specific section will also acquire single read lock on "all section" |
| 1650 |
|
// so that write lock on all section only need to acquire single write on on "all section" |
| 1651 |
|
// rather than to acquire multiple write locks on all the available sections. |
| 1652 |
|
if (index != BBS_max_section) |
| 1653 |
|
{ |
| 1654 |
|
sops[2].sem_num = BBS_max_section * 2 + 1; // w_sem of all section |
| 1655 |
|
sops[2].sem_op = 0; // wait until unlocked |
| 1656 |
|
sops[2].sem_flg = 0; |
| 1657 |
|
|
| 1658 |
|
sops[3].sem_num = BBS_max_section * 2; // r_sem of all section |
| 1659 |
|
sops[3].sem_op = 1; // lock |
| 1660 |
|
sops[3].sem_flg = SEM_UNDO; // undo on terminate |
| 1661 |
|
} |
| 1662 |
|
|
| 1663 |
|
#if defined(__CYGWIN__) |
| 1664 |
|
ret = semop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 2 : 4)); |
| 1665 |
|
#else |
| 1666 |
|
timeout.tv_sec = wait_sec; |
| 1667 |
|
timeout.tv_nsec = 0; |
| 1668 |
|
|
| 1669 |
|
ret = semtimedop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 2 : 4), &timeout); |
| 1670 |
|
#endif |
| 1671 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1672 |
|
{ |
| 1673 |
|
log_error("semop(index = %d, lock read) error %d\n", index, errno); |
| 1674 |
|
} |
| 1675 |
|
|
| 1676 |
|
return ret; |
| 1677 |
|
} |
| 1678 |
|
|
| 1679 |
|
int section_list_try_rw_lock(SECTION_LIST *p_section, int wait_sec) |
| 1680 |
|
{ |
| 1681 |
|
int index; |
| 1682 |
|
struct sembuf sops[3]; |
| 1683 |
|
#if !defined(__CYGWIN__) |
| 1684 |
|
struct timespec timeout; |
| 1685 |
|
#endif |
| 1686 |
|
int ret; |
| 1687 |
|
|
| 1688 |
|
index = get_section_index(p_section); |
| 1689 |
|
if (index < 0) |
| 1690 |
|
{ |
| 1691 |
|
return -2; |
| 1692 |
|
} |
| 1693 |
|
|
| 1694 |
|
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1695 |
|
sops[0].sem_op = 0; // wait until unlocked |
| 1696 |
|
sops[0].sem_flg = 0; |
| 1697 |
|
|
| 1698 |
|
sops[1].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1699 |
|
sops[1].sem_op = 1; // lock |
| 1700 |
|
sops[1].sem_flg = SEM_UNDO; // undo on terminate |
| 1701 |
|
|
| 1702 |
|
sops[2].sem_num = (unsigned short)(index * 2); // r_sem of section index |
| 1703 |
|
sops[2].sem_op = 0; // wait until unlocked |
| 1704 |
|
sops[2].sem_flg = 0; |
| 1705 |
|
|
| 1706 |
|
#if defined(__CYGWIN__) |
| 1707 |
|
ret = semop(p_section_list_pool->semid, sops, 3); |
| 1708 |
|
#else |
| 1709 |
|
timeout.tv_sec = wait_sec; |
| 1710 |
|
timeout.tv_nsec = 0; |
| 1711 |
|
|
| 1712 |
|
ret = semtimedop(p_section_list_pool->semid, sops, 3, &timeout); |
| 1713 |
|
#endif |
| 1714 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1715 |
|
{ |
| 1716 |
|
log_error("semop(index = %d, lock write) error %d\n", index, errno); |
| 1717 |
|
} |
| 1718 |
|
|
| 1719 |
|
return ret; |
| 1720 |
|
} |
| 1721 |
|
|
| 1722 |
|
int section_list_rd_unlock(SECTION_LIST *p_section) |
| 1723 |
|
{ |
| 1724 |
|
int index; |
| 1725 |
|
struct sembuf sops[2]; |
| 1726 |
|
int ret; |
| 1727 |
|
|
| 1728 |
|
index = get_section_index(p_section); |
| 1729 |
|
if (index < 0) |
| 1730 |
|
{ |
| 1731 |
|
return -2; |
| 1732 |
|
} |
| 1733 |
|
|
| 1734 |
|
sops[0].sem_num = (unsigned short)(index * 2); // r_sem of section index |
| 1735 |
|
sops[0].sem_op = -1; // unlock |
| 1736 |
|
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1737 |
|
|
| 1738 |
|
if (index != BBS_max_section) |
| 1739 |
|
{ |
| 1740 |
|
sops[1].sem_num = BBS_max_section * 2; // r_sem of all section |
| 1741 |
|
sops[1].sem_op = -1; // unlock |
| 1742 |
|
sops[1].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1743 |
|
} |
| 1744 |
|
|
| 1745 |
|
ret = semop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 1 : 2)); |
| 1746 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1747 |
|
{ |
| 1748 |
|
log_error("semop(index = %d, unlock read) error %d\n", index, errno); |
| 1749 |
|
} |
| 1750 |
|
|
| 1751 |
|
return ret; |
| 1752 |
|
} |
| 1753 |
|
|
| 1754 |
|
int section_list_rw_unlock(SECTION_LIST *p_section) |
| 1755 |
|
{ |
| 1756 |
|
int index; |
| 1757 |
|
struct sembuf sops[1]; |
| 1758 |
|
int ret; |
| 1759 |
|
|
| 1760 |
|
index = get_section_index(p_section); |
| 1761 |
|
if (index < 0) |
| 1762 |
|
{ |
| 1763 |
|
return -2; |
| 1764 |
|
} |
| 1765 |
|
|
| 1766 |
|
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1767 |
|
sops[0].sem_op = -1; // unlock |
| 1768 |
|
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1769 |
|
|
| 1770 |
|
ret = semop(p_section_list_pool->semid, sops, 1); |
| 1771 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1772 |
|
{ |
| 1773 |
|
log_error("semop(index = %d, unlock write) error %d\n", index, errno); |
| 1774 |
|
} |
| 1775 |
|
|
| 1776 |
|
return ret; |
| 1777 |
|
} |
| 1778 |
|
|
| 1779 |
|
int section_list_rd_lock(SECTION_LIST *p_section) |
| 1780 |
|
{ |
| 1781 |
|
int timer = 0; |
| 1782 |
|
int sid = (p_section == NULL ? 0 : p_section->sid); |
| 1783 |
|
int ret = -1; |
| 1784 |
|
|
| 1785 |
|
while (!SYS_server_exit) |
| 1786 |
|
{ |
| 1787 |
|
ret = section_list_try_rd_lock(p_section, SECTION_TRY_LOCK_WAIT_TIME); |
| 1788 |
|
if (ret == 0) // success |
| 1789 |
|
{ |
| 1790 |
|
break; |
| 1791 |
|
} |
| 1792 |
|
else if (errno == EAGAIN || errno == EINTR) // retry |
| 1793 |
|
{ |
| 1794 |
|
timer++; |
| 1795 |
|
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1796 |
|
{ |
| 1797 |
|
log_error("section_list_try_rd_lock() tried %d times on section %d\n", timer, sid); |
| 1798 |
|
} |
| 1799 |
|
} |
| 1800 |
|
else // failed |
| 1801 |
|
{ |
| 1802 |
|
log_error("section_list_try_rd_lock() failed on section %d\n", sid); |
| 1803 |
|
break; |
| 1804 |
|
} |
| 1805 |
|
} |
| 1806 |
|
|
| 1807 |
|
return ret; |
| 1808 |
|
} |
| 1809 |
|
|
| 1810 |
|
int section_list_rw_lock(SECTION_LIST *p_section) |
| 1811 |
|
{ |
| 1812 |
|
int timer = 0; |
| 1813 |
|
int sid = (p_section == NULL ? 0 : p_section->sid); |
| 1814 |
|
int ret = -1; |
| 1815 |
|
|
| 1816 |
|
while (!SYS_server_exit) |
| 1817 |
|
{ |
| 1818 |
|
ret = section_list_try_rw_lock(p_section, SECTION_TRY_LOCK_WAIT_TIME); |
| 1819 |
|
if (ret == 0) // success |
| 1820 |
|
{ |
| 1821 |
|
break; |
| 1822 |
|
} |
| 1823 |
|
else if (errno == EAGAIN || errno == EINTR) // retry |
| 1824 |
|
{ |
| 1825 |
|
timer++; |
| 1826 |
|
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1827 |
|
{ |
| 1828 |
|
log_error("section_list_try_rw_lock() tried %d times on section %d\n", timer, sid); |
| 1829 |
|
} |
| 1830 |
|
} |
| 1831 |
|
else // failed |
| 1832 |
|
{ |
| 1833 |
|
log_error("section_list_try_rw_lock() failed on section %d\n", sid); |
| 1834 |
|
break; |
| 1835 |
|
} |
| 1836 |
|
} |
| 1837 |
|
|
| 1838 |
|
return ret; |
| 1839 |
|
} |