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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 "log.h" |
#include "log.h" |
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#include "section_list.h" |
#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> |
#include <errno.h> |
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#include <fcntl.h> |
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#include <signal.h> |
#include <signal.h> |
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#include <stdio.h> |
#include <stdio.h> |
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#include <stdlib.h> |
#include <stdlib.h> |
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#include <string.h> |
#include <string.h> |
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#include <unistd.h> |
#include <unistd.h> |
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#include <sys/ipc.h> |
#include <sys/mman.h> |
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#include <sys/param.h> |
#include <sys/param.h> |
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#include <sys/sem.h> |
#include <sys/sem.h> |
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#include <sys/shm.h> |
#include <sys/stat.h> |
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#ifdef _SEM_SEMUN_UNDEFINED |
#if defined(_SEM_SEMUN_UNDEFINED) || defined(__CYGWIN__) |
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union semun |
union semun |
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{ |
{ |
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int val; /* Value for SETVAL */ |
int val; /* Value for SETVAL */ |
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struct seminfo *__buf; /* Buffer for IPC_INFO |
struct seminfo *__buf; /* Buffer for IPC_INFO |
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(Linux-specific) */ |
(Linux-specific) */ |
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}; |
}; |
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#endif // #ifdef _SEM_SEMUN_UNDEFINED |
#endif // #if defined(_SEM_SEMUN_UNDEFINED) |
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#define SECTION_TRY_LOCK_WAIT_TIME 1 // second |
enum _section_list_constant_t |
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#define SECTION_TRY_LOCK_TIMES 10 |
{ |
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SECTION_TRY_LOCK_WAIT_TIME = 1, // second |
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SECTION_TRY_LOCK_TIMES = 10, |
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#define ARTICLE_BLOCK_PER_SHM 1000 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
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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#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 80 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
ARTICLE_BLOCK_SHM_COUNT_LIMIT = 80, // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
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#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
ARTICLE_BLOCK_PER_POOL = (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT), |
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#define CALCULATE_PAGE_THRESHOLD 100 // Adjust to tune performance of moving topic between sections |
CALCULATE_PAGE_THRESHOLD = 100, // Adjust to tune performance of moving topic between sections |
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|
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#define SID_STR_LEN 5 // 32-bit + NULL |
SID_STR_LEN = 5, // 32-bit + NULL |
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}; |
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struct article_block_t |
struct article_block_t |
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{ |
{ |
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ARTICLE articles[ARTICLE_PER_BLOCK]; |
ARTICLE articles[BBS_article_count_per_block]; |
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int article_count; |
int article_count; |
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struct article_block_t *p_next_block; |
struct article_block_t *p_next_block; |
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}; |
}; |
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struct article_block_pool_t |
struct article_block_pool_t |
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{ |
{ |
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int shmid; |
size_t shm_size; |
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struct |
struct |
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{ |
{ |
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int shmid; |
size_t shm_size; |
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void *p_shm; |
void *p_shm; |
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} shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
} shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
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int shm_count; |
int shm_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 char article_block_shm_name[FILE_NAME_LEN]; |
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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 char section_list_shm_name[FILE_NAME_LEN]; |
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SECTION_LIST_POOL *p_section_list_pool = NULL; |
SECTION_LIST_POOL *p_section_list_pool = 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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int shmid; |
char filepath[FILE_PATH_LEN]; |
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int proj_id; |
int fd; |
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key_t key; |
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size_t size; |
size_t size; |
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void *p_shm; |
void *p_shm; |
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int i; |
int i; |
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return -2; |
return -2; |
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} |
} |
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strncpy(filepath, filename, sizeof(filepath) - 1); |
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filepath[sizeof(filepath) - 1] = '\0'; |
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snprintf(article_block_shm_name, sizeof(article_block_shm_name), "/ARTICLE_BLOCK_SHM_%s", basename(filepath)); |
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// Allocate shared memory |
// Allocate shared memory |
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proj_id = ARTICLE_BLOCK_SHM_COUNT_LIMIT; // keep different from proj_id used to create block shm |
size = sizeof(ARTICLE_BLOCK_POOL); |
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key = ftok(filename, proj_id); |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, ARTICLE_BLOCK_SHM_COUNT_LIMIT); |
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if (key == -1) |
|
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|
if (shm_unlink(filepath) == -1 && errno != ENOENT) |
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{ |
{ |
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log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
log_error("shm_unlink(%s) error (%d)\n", filepath, errno); |
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return -3; |
return -2; |
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} |
} |
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size = sizeof(ARTICLE_BLOCK_POOL); |
if ((fd = shm_open(filepath, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1) |
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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); |
log_error("shm_open(%s) error (%d)\n", filepath, errno); |
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return -3; |
return -2; |
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} |
} |
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p_shm = shmat(shmid, NULL, 0); |
if (ftruncate(fd, (off_t)size) == -1) |
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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); |
log_error("ftruncate(size=%d) error (%d)\n", size, errno); |
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return -3; |
close(fd); |
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return -2; |
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} |
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p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L); |
| 133 |
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if (p_shm == MAP_FAILED) |
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{ |
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log_error("mmap() error (%d)\n", errno); |
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close(fd); |
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return -2; |
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} |
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if (close(fd) < 0) |
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{ |
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log_error("close(fd) error (%d)\n", errno); |
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return -1; |
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} |
} |
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p_article_block_pool = p_shm; |
p_article_block_pool = p_shm; |
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p_article_block_pool->shmid = shmid; |
p_article_block_pool->shm_size = size; |
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|
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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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|
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proj_id = p_article_block_pool->shm_count; |
size = sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
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key = ftok(filename, proj_id); |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, p_article_block_pool->shm_count); |
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if (key == -1) |
|
| 160 |
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if (shm_unlink(filepath) == -1 && errno != ENOENT) |
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{ |
{ |
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log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
log_error("shm_unlink(%s) error (%d)\n", filepath, errno); |
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article_block_cleanup(); |
return -2; |
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return -3; |
|
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} |
} |
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size = sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
if ((fd = shm_open(filepath, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1) |
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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(shm_index = %d, size = %d) error (%d)\n", p_article_block_pool->shm_count, size, errno); |
log_error("shm_open(%s) error (%d)\n", filepath, errno); |
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article_block_cleanup(); |
return -2; |
|
return -3; |
|
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} |
} |
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p_shm = shmat(shmid, NULL, 0); |
if (ftruncate(fd, (off_t)size) == -1) |
|
if (p_shm == (void *)-1) |
|
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{ |
{ |
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log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
log_error("ftruncate(size=%d) error (%d)\n", size, errno); |
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article_block_cleanup(); |
close(fd); |
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return -3; |
return -2; |
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} |
} |
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(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->shmid = shmid; |
p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L); |
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if (p_shm == MAP_FAILED) |
| 180 |
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{ |
| 181 |
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log_error("mmap() error (%d)\n", errno); |
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close(fd); |
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return -2; |
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} |
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if (close(fd) < 0) |
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{ |
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log_error("close(fd) error (%d)\n", errno); |
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return -1; |
| 190 |
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} |
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(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->shm_size = size; |
| 193 |
(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->p_shm = p_shm; |
(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->p_shm = p_shm; |
| 194 |
p_article_block_pool->shm_count++; |
p_article_block_pool->shm_count++; |
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| 218 |
void article_block_cleanup(void) |
void article_block_cleanup(void) |
| 219 |
{ |
{ |
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int shmid; |
char filepath[FILE_PATH_LEN]; |
| 221 |
|
|
| 222 |
if (p_article_block_pool == NULL) |
if (p_article_block_pool == NULL) |
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{ |
{ |
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|
|
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for (int i = 0; i < p_article_block_pool->shm_count; i++) |
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) |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, i); |
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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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|
|
| 231 |
if (shmctl((p_article_block_pool->shm_pool + i)->shmid, IPC_RMID, NULL) == -1) |
if (shm_unlink(filepath) == -1 && errno != ENOENT) |
| 232 |
{ |
{ |
| 233 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
log_error("shm_unlink(%s) error (%d)\n", filepath, errno); |
| 234 |
} |
} |
| 235 |
} |
} |
| 236 |
|
|
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shmid = p_article_block_pool->shmid; |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, ARTICLE_BLOCK_SHM_COUNT_LIMIT); |
| 238 |
|
|
| 239 |
if (shmdt(p_article_block_pool) == -1) |
if (shm_unlink(filepath) == -1 && errno != ENOENT) |
| 240 |
{ |
{ |
| 241 |
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
log_error("shm_unlink(%s) error (%d)\n", filepath, errno); |
| 242 |
} |
} |
| 243 |
|
|
| 244 |
if (shmctl(shmid, IPC_RMID, NULL) == -1) |
detach_article_block_shm(); |
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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; |
|
| 245 |
} |
} |
| 246 |
|
|
| 247 |
int set_article_block_shm_readonly(void) |
int set_article_block_shm_readonly(void) |
| 248 |
{ |
{ |
|
int shmid; |
|
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void *p_shm; |
|
| 249 |
int i; |
int i; |
| 250 |
|
|
| 251 |
if (p_article_block_pool == NULL) |
if (p_article_block_pool == NULL) |
| 256 |
|
|
| 257 |
for (i = 0; i < p_article_block_pool->shm_count; i++) |
for (i = 0; i < p_article_block_pool->shm_count; i++) |
| 258 |
{ |
{ |
| 259 |
shmid = (p_article_block_pool->shm_pool + i)->shmid; |
if ((p_article_block_pool->shm_pool + i)->p_shm != NULL && |
| 260 |
|
mprotect((p_article_block_pool->shm_pool + i)->p_shm, (p_article_block_pool->shm_pool + i)->shm_size, PROT_READ) < 0) |
|
// Remap shared memory in read-only mode |
|
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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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if (p_shm == (void *)-1) |
|
| 261 |
{ |
{ |
| 262 |
log_error("shmat(article_block_pool shmid = %d) error (%d)\n", shmid, errno); |
log_error("mprotect() error (%d)\n", errno); |
| 263 |
return -2; |
return -2; |
| 264 |
} |
} |
| 265 |
} |
} |
| 266 |
|
|
| 267 |
|
if (p_article_block_pool != NULL && |
| 268 |
|
mprotect(p_article_block_pool, p_article_block_pool->shm_size, PROT_READ) < 0) |
| 269 |
|
{ |
| 270 |
|
log_error("mprotect() error (%d)\n", errno); |
| 271 |
|
return -3; |
| 272 |
|
} |
| 273 |
|
|
| 274 |
return 0; |
return 0; |
| 275 |
} |
} |
| 276 |
|
|
| 277 |
int detach_article_block_shm(void) |
int detach_article_block_shm(void) |
| 278 |
{ |
{ |
|
int shmid; |
|
|
|
|
| 279 |
if (p_article_block_pool == NULL) |
if (p_article_block_pool == NULL) |
| 280 |
{ |
{ |
| 281 |
return -1; |
return -1; |
| 283 |
|
|
| 284 |
for (int i = 0; i < p_article_block_pool->shm_count; i++) |
for (int i = 0; i < p_article_block_pool->shm_count; i++) |
| 285 |
{ |
{ |
| 286 |
if ((p_article_block_pool->shm_pool + i)->p_shm != NULL && shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
if ((p_article_block_pool->shm_pool + i)->p_shm != NULL && |
| 287 |
|
munmap((p_article_block_pool->shm_pool + i)->p_shm, (p_article_block_pool->shm_pool + i)->shm_size) < 0) |
| 288 |
{ |
{ |
| 289 |
log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
log_error("munmap() error (%d)\n", errno); |
| 290 |
return -2; |
return -2; |
| 291 |
} |
} |
| 292 |
} |
} |
| 293 |
|
|
| 294 |
shmid = p_article_block_pool->shmid; |
if (p_article_block_pool != NULL && munmap(p_article_block_pool, p_article_block_pool->shm_size) < 0) |
|
|
|
|
if (shmdt(p_article_block_pool) == -1) |
|
| 295 |
{ |
{ |
| 296 |
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
log_error("munmap() error (%d)\n", errno); |
| 297 |
return -3; |
return -3; |
| 298 |
} |
} |
| 299 |
|
|
| 362 |
} |
} |
| 363 |
|
|
| 364 |
left = 0; |
left = 0; |
| 365 |
right = p_article_block_pool->block_count; |
right = p_article_block_pool->block_count - 1; |
| 366 |
|
|
| 367 |
// 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] ] |
| 368 |
while (left < right - 1) |
while (left < right) |
| 369 |
{ |
{ |
| 370 |
// 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 |
| 371 |
mid = (left + right) / 2 + (right - left) % 2; |
mid = (left + right) / 2 + (left + right) % 2; |
|
|
|
|
if (mid >= p_article_block_pool->block_count) |
|
|
{ |
|
|
log_error("block(mid = %d) is out of boundary\n", mid); |
|
|
return NULL; |
|
|
} |
|
| 372 |
|
|
| 373 |
if (aid < p_article_block_pool->p_block[mid]->articles[0].aid) |
if (aid < p_article_block_pool->p_block[mid]->articles[0].aid) |
| 374 |
{ |
{ |
| 375 |
right = mid; |
right = mid - 1; |
| 376 |
} |
} |
| 377 |
else |
else // if (aid >= p_article_block_pool->p_block[mid]->articles[0].aid) |
| 378 |
{ |
{ |
| 379 |
left = mid; |
left = mid; |
| 380 |
} |
} |
| 418 |
return NULL; |
return NULL; |
| 419 |
} |
} |
| 420 |
|
|
| 421 |
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) |
| 422 |
{ |
{ |
| 423 |
log_error("article_block_find_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); |
| 424 |
return NULL; |
return NULL; |
| 425 |
} |
} |
| 426 |
|
|
| 427 |
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]; |
| 428 |
|
|
| 429 |
if (index % ARTICLE_PER_BLOCK >= p_block->article_count) |
if (index % BBS_article_count_per_block >= p_block->article_count) |
| 430 |
{ |
{ |
| 431 |
log_error("article_block_find_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); |
| 432 |
return NULL; |
return NULL; |
| 433 |
} |
} |
| 434 |
|
|
| 435 |
return (p_block->articles + (index % ARTICLE_PER_BLOCK)); |
return (p_block->articles + (index % BBS_article_count_per_block)); |
| 436 |
} |
} |
| 437 |
|
|
| 438 |
extern int section_list_init(const char *filename) |
extern int section_list_init(const char *filename) |
| 439 |
{ |
{ |
| 440 |
|
char filepath[FILE_PATH_LEN]; |
| 441 |
|
int fd; |
| 442 |
|
size_t size; |
| 443 |
|
void *p_shm; |
| 444 |
int semid; |
int semid; |
|
int shmid; |
|
| 445 |
int proj_id; |
int proj_id; |
| 446 |
key_t key; |
key_t key; |
|
size_t size; |
|
|
void *p_shm; |
|
| 447 |
union semun arg; |
union semun arg; |
| 448 |
int i; |
int i; |
| 449 |
|
|
| 452 |
section_list_cleanup(); |
section_list_cleanup(); |
| 453 |
} |
} |
| 454 |
|
|
| 455 |
proj_id = (int)(time(NULL) % getpid()); |
// Allocate shared memory |
| 456 |
key = ftok(filename, proj_id); |
size = sizeof(SECTION_LIST_POOL); |
| 457 |
if (key == -1) |
|
| 458 |
|
strncpy(filepath, filename, sizeof(filepath) - 1); |
| 459 |
|
filepath[sizeof(filepath) - 1] = '\0'; |
| 460 |
|
snprintf(section_list_shm_name, sizeof(section_list_shm_name), "/SECTION_LIST_SHM_%s", basename(filepath)); |
| 461 |
|
|
| 462 |
|
if (shm_unlink(section_list_shm_name) == -1 && errno != ENOENT) |
| 463 |
{ |
{ |
| 464 |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
log_error("shm_unlink(%s) error (%d)\n", section_list_shm_name, errno); |
| 465 |
return -3; |
return -2; |
| 466 |
} |
} |
| 467 |
|
|
| 468 |
// Allocate shared memory |
if ((fd = shm_open(section_list_shm_name, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1) |
|
size = sizeof(SECTION_LIST_POOL); |
|
|
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
|
|
if (shmid == -1) |
|
| 469 |
{ |
{ |
| 470 |
log_error("shmget(section_list_pool_shm, size = %d) error (%d)\n", size, errno); |
log_error("shm_open(%s) error (%d)\n", section_list_shm_name, errno); |
| 471 |
return -3; |
return -2; |
| 472 |
} |
} |
| 473 |
p_shm = shmat(shmid, NULL, 0); |
if (ftruncate(fd, (off_t)size) == -1) |
|
if (p_shm == (void *)-1) |
|
| 474 |
{ |
{ |
| 475 |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
log_error("ftruncate(size=%d) error (%d)\n", size, errno); |
| 476 |
return -3; |
close(fd); |
| 477 |
|
return -2; |
| 478 |
|
} |
| 479 |
|
|
| 480 |
|
p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L); |
| 481 |
|
if (p_shm == MAP_FAILED) |
| 482 |
|
{ |
| 483 |
|
log_error("mmap() error (%d)\n", errno); |
| 484 |
|
close(fd); |
| 485 |
|
return -2; |
| 486 |
|
} |
| 487 |
|
|
| 488 |
|
if (close(fd) < 0) |
| 489 |
|
{ |
| 490 |
|
log_error("close(fd) error (%d)\n", errno); |
| 491 |
|
return -1; |
| 492 |
} |
} |
| 493 |
|
|
| 494 |
p_section_list_pool = p_shm; |
p_section_list_pool = p_shm; |
| 495 |
p_section_list_pool->shmid = shmid; |
p_section_list_pool->shm_size = size; |
| 496 |
p_section_list_pool->section_count = 0; |
p_section_list_pool->section_count = 0; |
| 497 |
|
|
| 498 |
// Allocate semaphore as section locks |
// Allocate semaphore as section locks |
| 499 |
|
proj_id = (int)(time(NULL) % getpid()); |
| 500 |
|
key = ftok(filename, proj_id); |
| 501 |
|
if (key == -1) |
| 502 |
|
{ |
| 503 |
|
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
| 504 |
|
return -3; |
| 505 |
|
} |
| 506 |
|
|
| 507 |
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections |
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections |
| 508 |
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600); |
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600); |
| 509 |
if (semid == -1) |
if (semid == -1) |
| 544 |
|
|
| 545 |
void section_list_cleanup(void) |
void section_list_cleanup(void) |
| 546 |
{ |
{ |
|
int shmid; |
|
|
|
|
| 547 |
if (p_section_list_pool == NULL) |
if (p_section_list_pool == NULL) |
| 548 |
{ |
{ |
| 549 |
return; |
return; |
| 561 |
p_section_list_pool->p_trie_dict_section_by_sid = NULL; |
p_section_list_pool->p_trie_dict_section_by_sid = NULL; |
| 562 |
} |
} |
| 563 |
|
|
|
shmid = p_section_list_pool->shmid; |
|
|
|
|
| 564 |
if (semctl(p_section_list_pool->semid, 0, IPC_RMID) == -1) |
if (semctl(p_section_list_pool->semid, 0, IPC_RMID) == -1) |
| 565 |
{ |
{ |
| 566 |
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", p_section_list_pool->semid, errno); |
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", p_section_list_pool->semid, errno); |
| 567 |
} |
} |
| 568 |
|
|
| 569 |
if (shmdt(p_section_list_pool) == -1) |
detach_section_list_shm(); |
|
{ |
|
|
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
|
|
} |
|
| 570 |
|
|
| 571 |
if (shmctl(shmid, IPC_RMID, NULL) == -1) |
if (shm_unlink(section_list_shm_name) == -1 && errno != ENOENT) |
| 572 |
{ |
{ |
| 573 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", shmid, errno); |
log_error("shm_unlink(%s) error (%d)\n", section_list_shm_name, errno); |
| 574 |
} |
} |
|
|
|
|
p_section_list_pool = NULL; |
|
| 575 |
} |
} |
| 576 |
|
|
| 577 |
int set_section_list_shm_readonly(void) |
int set_section_list_shm_readonly(void) |
| 578 |
{ |
{ |
|
int shmid; |
|
|
void *p_shm; |
|
|
|
|
| 579 |
if (p_section_list_pool == NULL) |
if (p_section_list_pool == NULL) |
| 580 |
{ |
{ |
| 581 |
log_error("p_section_list_pool not initialized\n"); |
log_error("p_section_list_pool not initialized\n"); |
| 582 |
return -1; |
return -1; |
| 583 |
} |
} |
| 584 |
|
|
| 585 |
shmid = p_section_list_pool->shmid; |
if (p_section_list_pool != NULL && |
| 586 |
|
mprotect(p_section_list_pool, p_section_list_pool->shm_size, PROT_READ) < 0) |
|
// Remap shared memory in read-only mode |
|
|
p_shm = shmat(shmid, p_section_list_pool, SHM_RDONLY | SHM_REMAP); |
|
|
if (p_shm == (void *)-1) |
|
| 587 |
{ |
{ |
| 588 |
log_error("shmat(section_list_pool shmid = %d) error (%d)\n", shmid, errno); |
log_error("mprotect() error (%d)\n", errno); |
| 589 |
return -3; |
return -2; |
| 590 |
} |
} |
| 591 |
|
|
|
p_section_list_pool = p_shm; |
|
|
|
|
| 592 |
return 0; |
return 0; |
| 593 |
} |
} |
| 594 |
|
|
| 595 |
int detach_section_list_shm(void) |
int detach_section_list_shm(void) |
| 596 |
{ |
{ |
| 597 |
if (p_section_list_pool != NULL && shmdt(p_section_list_pool) == -1) |
if (p_section_list_pool != NULL && munmap(p_section_list_pool, p_section_list_pool->shm_size) < 0) |
| 598 |
{ |
{ |
| 599 |
log_error("shmdt(section_list_pool) error (%d)\n", errno); |
log_error("munmap() error (%d)\n", errno); |
| 600 |
return -1; |
return -1; |
| 601 |
} |
} |
| 602 |
|
|
| 671 |
return p_section; |
return p_section; |
| 672 |
} |
} |
| 673 |
|
|
| 674 |
|
int section_list_update(SECTION_LIST *p_section, const char *sname, const char *stitle, const char *master_list) |
| 675 |
|
{ |
| 676 |
|
int64_t index; |
| 677 |
|
|
| 678 |
|
if (p_section == NULL || sname == NULL || stitle == NULL || master_list == NULL) |
| 679 |
|
{ |
| 680 |
|
log_error("NULL pointer error\n"); |
| 681 |
|
return -1; |
| 682 |
|
} |
| 683 |
|
|
| 684 |
|
index = get_section_index(p_section); |
| 685 |
|
|
| 686 |
|
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1); |
| 687 |
|
p_section->sname[sizeof(p_section->sname) - 1] = '\0'; |
| 688 |
|
|
| 689 |
|
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle) - 1); |
| 690 |
|
p_section->stitle[sizeof(p_section->stitle) - 1] = '\0'; |
| 691 |
|
|
| 692 |
|
strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1); |
| 693 |
|
p_section->master_list[sizeof(p_section->master_list) - 1] = '\0'; |
| 694 |
|
|
| 695 |
|
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, index) < 0) |
| 696 |
|
{ |
| 697 |
|
log_error("trie_dict_set(section, %s, %d) error\n", sname, index); |
| 698 |
|
return -2; |
| 699 |
|
} |
| 700 |
|
|
| 701 |
|
return 0; |
| 702 |
|
} |
| 703 |
|
|
| 704 |
void section_list_reset_articles(SECTION_LIST *p_section) |
void section_list_reset_articles(SECTION_LIST *p_section) |
| 705 |
{ |
{ |
| 706 |
p_section->article_count = 0; |
p_section->article_count = 0; |
| 716 |
p_section->ontop_article_count = 0; |
p_section->ontop_article_count = 0; |
| 717 |
} |
} |
| 718 |
|
|
| 719 |
SECTION_LIST *section_list_find_by_name(const char *sname, int64_t *p_index) |
SECTION_LIST *section_list_find_by_name(const char *sname) |
| 720 |
{ |
{ |
| 721 |
int64_t index; |
int64_t index; |
| 722 |
int ret; |
int ret; |
| 738 |
return NULL; |
return NULL; |
| 739 |
} |
} |
| 740 |
|
|
|
if (p_index != NULL) |
|
|
{ |
|
|
*p_index = index; |
|
|
} |
|
|
|
|
| 741 |
return (p_section_list_pool->sections + index); |
return (p_section_list_pool->sections + index); |
| 742 |
} |
} |
| 743 |
|
|
| 744 |
SECTION_LIST *section_list_find_by_sid(int32_t sid, int64_t *p_index) |
SECTION_LIST *section_list_find_by_sid(int32_t sid) |
| 745 |
{ |
{ |
| 746 |
int64_t index; |
int64_t index; |
| 747 |
int ret; |
int ret; |
| 766 |
return NULL; |
return NULL; |
| 767 |
} |
} |
| 768 |
|
|
|
if (p_index != NULL) |
|
|
{ |
|
|
*p_index = index; |
|
|
} |
|
|
|
|
| 769 |
return (p_section_list_pool->sections + index); |
return (p_section_list_pool->sections + index); |
| 770 |
} |
} |
| 771 |
|
|
| 779 |
|
|
| 780 |
if (p_section == NULL || p_article_src == NULL) |
if (p_section == NULL || p_article_src == NULL) |
| 781 |
{ |
{ |
| 782 |
log_error("section_list_append_article() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 783 |
return -1; |
return -1; |
| 784 |
} |
} |
| 785 |
|
|
| 802 |
} |
} |
| 803 |
|
|
| 804 |
if (p_article_block_pool->block_count == 0 || |
if (p_article_block_pool->block_count == 0 || |
| 805 |
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) |
| 806 |
{ |
{ |
| 807 |
if ((p_block = pop_free_article_block()) == NULL) |
if ((p_block = pop_free_article_block()) == NULL) |
| 808 |
{ |
{ |
| 812 |
|
|
| 813 |
if (p_article_block_pool->block_count > 0) |
if (p_article_block_pool->block_count > 0) |
| 814 |
{ |
{ |
| 815 |
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; |
| 816 |
} |
} |
| 817 |
|
|
| 818 |
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; |
| 891 |
p_section->p_article_tail = p_article; |
p_section->p_article_tail = p_article; |
| 892 |
|
|
| 893 |
// Update page |
// Update page |
| 894 |
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) || |
| 895 |
p_section->article_count == 1) |
p_section->page_count == 0) |
| 896 |
{ |
{ |
| 897 |
p_section->p_page_first_article[p_section->page_count] = p_article; |
p_section->p_page_first_article[p_section->page_count] = p_article; |
| 898 |
p_section->page_count++; |
p_section->page_count++; |
| 947 |
{ |
{ |
| 948 |
p_section->visible_article_count--; |
p_section->visible_article_count--; |
| 949 |
|
|
| 950 |
|
if (user_article_cnt_inc(p_article->uid, -1) < 0) |
| 951 |
|
{ |
| 952 |
|
log_error("user_article_cnt_inc(uid=%d, -1) error\n", p_article->uid); |
| 953 |
|
} |
| 954 |
|
|
| 955 |
if (p_article->tid == 0) |
if (p_article->tid == 0) |
| 956 |
{ |
{ |
| 957 |
p_section->visible_topic_count--; |
p_section->visible_topic_count--; |
| 970 |
p_reply->visible = 0; |
p_reply->visible = 0; |
| 971 |
p_section->visible_article_count--; |
p_section->visible_article_count--; |
| 972 |
affected_count++; |
affected_count++; |
| 973 |
|
|
| 974 |
|
if (user_article_cnt_inc(p_reply->uid, -1) < 0) |
| 975 |
|
{ |
| 976 |
|
log_error("user_article_cnt_inc(uid=%d, -1) error\n", p_reply->uid); |
| 977 |
|
} |
| 978 |
} |
} |
| 979 |
} |
} |
| 980 |
} |
} |
| 987 |
{ |
{ |
| 988 |
p_section->visible_topic_count++; |
p_section->visible_topic_count++; |
| 989 |
} |
} |
| 990 |
|
|
| 991 |
|
if (user_article_cnt_inc(p_article->uid, 1) < 0) |
| 992 |
|
{ |
| 993 |
|
log_error("user_article_cnt_inc(uid=%d, 1) error\n", p_article->uid); |
| 994 |
|
} |
| 995 |
} |
} |
| 996 |
|
|
| 997 |
p_article->visible = visible; |
p_article->visible = visible; |
| 1090 |
return -1; |
return -1; |
| 1091 |
} |
} |
| 1092 |
|
|
| 1093 |
page_count = p_section->page_count - (p_section->last_page_visible_article_count > 0 ? 1 : 0) + |
page_count = p_section->page_count - 1 + |
| 1094 |
(p_section->last_page_visible_article_count + p_section->ontop_article_count) / BBS_article_limit_per_page + |
(p_section->last_page_visible_article_count + p_section->ontop_article_count + BBS_article_limit_per_page - 1) / |
| 1095 |
((p_section->last_page_visible_article_count + p_section->ontop_article_count) % BBS_article_limit_per_page == 0 ? 0 : 1); |
BBS_article_limit_per_page; |
| 1096 |
|
|
| 1097 |
|
if (page_count < 0) |
| 1098 |
|
{ |
| 1099 |
|
page_count = 0; |
| 1100 |
|
} |
| 1101 |
|
|
| 1102 |
return page_count; |
return page_count; |
| 1103 |
} |
} |
| 1116 |
} |
} |
| 1117 |
else // if (page_id >= p_section->page_count - 1) |
else // if (page_id >= p_section->page_count - 1) |
| 1118 |
{ |
{ |
| 1119 |
return MAX(0, (p_section->last_page_visible_article_count + p_section->ontop_article_count - |
return MIN(MAX(0, |
| 1120 |
BBS_article_limit_per_page * (page_id - p_section->page_count + 1))); |
(p_section->last_page_visible_article_count + p_section->ontop_article_count - |
| 1121 |
|
BBS_article_limit_per_page * (page_id - p_section->page_count + 1))), |
| 1122 |
|
BBS_article_limit_per_page); |
| 1123 |
} |
} |
| 1124 |
} |
} |
| 1125 |
|
|
| 1136 |
|
|
| 1137 |
if (p_section == NULL) |
if (p_section == NULL) |
| 1138 |
{ |
{ |
| 1139 |
log_error("section_list_find_article_with_offset() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1140 |
return NULL; |
return NULL; |
| 1141 |
} |
} |
| 1142 |
|
|
| 1148 |
} |
} |
| 1149 |
|
|
| 1150 |
left = 0; |
left = 0; |
| 1151 |
right = p_section->page_count; |
right = p_section->page_count - 1; |
| 1152 |
|
|
| 1153 |
// 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] ] |
| 1154 |
while (left < right - 1) |
while (left < right) |
| 1155 |
{ |
{ |
| 1156 |
// 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 |
| 1157 |
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; |
|
|
} |
|
| 1158 |
|
|
| 1159 |
if (aid < p_section->p_page_first_article[mid]->aid) |
if (aid < p_section->p_page_first_article[mid]->aid) |
| 1160 |
{ |
{ |
| 1161 |
right = mid; |
right = mid - 1; |
| 1162 |
} |
} |
| 1163 |
else |
else // if (aid < p_section->p_page_first_article[mid]->aid) |
| 1164 |
{ |
{ |
| 1165 |
left = mid; |
left = mid; |
| 1166 |
} |
} |
| 1222 |
|
|
| 1223 |
if (p_section == NULL) |
if (p_section == NULL) |
| 1224 |
{ |
{ |
| 1225 |
log_error("section_list_calculate_page() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1226 |
return -1; |
return -1; |
| 1227 |
} |
} |
| 1228 |
|
|
| 1311 |
} while (p_article != p_section->p_article_head); |
} while (p_article != p_section->p_article_head); |
| 1312 |
|
|
| 1313 |
p_section->page_count = page + (visible_article_count > 0 ? 1 : 0); |
p_section->page_count = page + (visible_article_count > 0 ? 1 : 0); |
| 1314 |
p_section->last_page_visible_article_count = visible_article_count; |
p_section->last_page_visible_article_count = (visible_article_count > 0 |
| 1315 |
|
? visible_article_count |
| 1316 |
|
: (page > 0 ? BBS_article_limit_per_page : 0)); |
| 1317 |
|
|
| 1318 |
return 0; |
return 0; |
| 1319 |
} |
} |
| 1335 |
return -1; |
return -1; |
| 1336 |
} |
} |
| 1337 |
|
|
| 1338 |
ret = (p_article_block_pool->block_count - 1) * ARTICLE_PER_BLOCK + |
ret = (p_article_block_pool->block_count - 1) * BBS_article_count_per_block + |
| 1339 |
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count; |
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count; |
| 1340 |
|
|
| 1341 |
return ret; |
return ret; |
| 1383 |
|
|
| 1384 |
if (p_section_src == NULL || p_section_dest == NULL) |
if (p_section_src == NULL || p_section_dest == NULL) |
| 1385 |
{ |
{ |
| 1386 |
log_error("section_list_move_topic() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
| 1387 |
return -1; |
return -1; |
| 1388 |
} |
} |
| 1389 |
|
|
| 1596 |
return index; |
return index; |
| 1597 |
} |
} |
| 1598 |
|
|
| 1599 |
|
int get_section_info(SECTION_LIST *p_section, char *sname, char *stitle, char *master_list) |
| 1600 |
|
{ |
| 1601 |
|
if (p_section == NULL) |
| 1602 |
|
{ |
| 1603 |
|
log_error("NULL pointer error\n"); |
| 1604 |
|
return -1; |
| 1605 |
|
} |
| 1606 |
|
|
| 1607 |
|
if (section_list_rd_lock(p_section) < 0) |
| 1608 |
|
{ |
| 1609 |
|
log_error("section_list_rd_lock(sid=%d) error\n", p_section->sid); |
| 1610 |
|
return -2; |
| 1611 |
|
} |
| 1612 |
|
|
| 1613 |
|
if (sname != NULL) |
| 1614 |
|
{ |
| 1615 |
|
memcpy(sname, p_section->sname, sizeof(p_section->sname)); |
| 1616 |
|
} |
| 1617 |
|
if (stitle != NULL) |
| 1618 |
|
{ |
| 1619 |
|
memcpy(stitle, p_section->stitle, sizeof(p_section->stitle)); |
| 1620 |
|
} |
| 1621 |
|
if (master_list != NULL) |
| 1622 |
|
{ |
| 1623 |
|
memcpy(master_list, p_section->master_list, sizeof(p_section->master_list)); |
| 1624 |
|
} |
| 1625 |
|
|
| 1626 |
|
// release lock of section |
| 1627 |
|
if (section_list_rd_unlock(p_section) < 0) |
| 1628 |
|
{ |
| 1629 |
|
log_error("section_list_rd_unlock(sid=%d) error\n", p_section->sid); |
| 1630 |
|
return -2; |
| 1631 |
|
} |
| 1632 |
|
|
| 1633 |
|
return 0; |
| 1634 |
|
} |
| 1635 |
|
|
| 1636 |
int section_list_try_rd_lock(SECTION_LIST *p_section, int wait_sec) |
int section_list_try_rd_lock(SECTION_LIST *p_section, int wait_sec) |
| 1637 |
{ |
{ |
| 1638 |
int index; |
int index; |
| 1639 |
struct sembuf sops[4]; |
struct sembuf sops[4]; |
| 1640 |
|
#ifndef __CYGWIN__ |
| 1641 |
struct timespec timeout; |
struct timespec timeout; |
| 1642 |
|
#endif |
| 1643 |
int ret; |
int ret; |
| 1644 |
|
|
| 1645 |
index = get_section_index(p_section); |
index = get_section_index(p_section); |
| 1670 |
sops[3].sem_flg = SEM_UNDO; // undo on terminate |
sops[3].sem_flg = SEM_UNDO; // undo on terminate |
| 1671 |
} |
} |
| 1672 |
|
|
| 1673 |
|
#ifdef __CYGWIN__ |
| 1674 |
|
ret = semop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 2 : 4)); |
| 1675 |
|
#else |
| 1676 |
timeout.tv_sec = wait_sec; |
timeout.tv_sec = wait_sec; |
| 1677 |
timeout.tv_nsec = 0; |
timeout.tv_nsec = 0; |
| 1678 |
|
|
| 1679 |
ret = semtimedop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 2 : 4), &timeout); |
ret = semtimedop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 2 : 4), &timeout); |
| 1680 |
|
#endif |
| 1681 |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1682 |
{ |
{ |
| 1683 |
log_error("semtimedop(index = %d, lock read) error %d\n", index, errno); |
log_error("semop(index = %d, lock read) error %d\n", index, errno); |
| 1684 |
} |
} |
| 1685 |
|
|
| 1686 |
return ret; |
return ret; |
| 1690 |
{ |
{ |
| 1691 |
int index; |
int index; |
| 1692 |
struct sembuf sops[3]; |
struct sembuf sops[3]; |
| 1693 |
|
#ifndef __CYGWIN__ |
| 1694 |
struct timespec timeout; |
struct timespec timeout; |
| 1695 |
|
#endif |
| 1696 |
int ret; |
int ret; |
| 1697 |
|
|
| 1698 |
index = get_section_index(p_section); |
index = get_section_index(p_section); |
| 1713 |
sops[2].sem_op = 0; // wait until unlocked |
sops[2].sem_op = 0; // wait until unlocked |
| 1714 |
sops[2].sem_flg = 0; |
sops[2].sem_flg = 0; |
| 1715 |
|
|
| 1716 |
|
#ifdef __CYGWIN__ |
| 1717 |
|
ret = semop(p_section_list_pool->semid, sops, 3); |
| 1718 |
|
#else |
| 1719 |
timeout.tv_sec = wait_sec; |
timeout.tv_sec = wait_sec; |
| 1720 |
timeout.tv_nsec = 0; |
timeout.tv_nsec = 0; |
| 1721 |
|
|
| 1722 |
ret = semtimedop(p_section_list_pool->semid, sops, 3, &timeout); |
ret = semtimedop(p_section_list_pool->semid, sops, 3, &timeout); |
| 1723 |
|
#endif |
| 1724 |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1725 |
{ |
{ |
| 1726 |
log_error("semtimedop(index = %d, lock write) error %d\n", index, errno); |
log_error("semop(index = %d, lock write) error %d\n", index, errno); |
| 1727 |
} |
} |
| 1728 |
|
|
| 1729 |
return ret; |
return ret; |
| 1804 |
timer++; |
timer++; |
| 1805 |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1806 |
{ |
{ |
| 1807 |
log_error("section_list_try_rd_lock() tried %d times on section %d\n", sid, timer); |
log_error("section_list_try_rd_lock() tried %d times on section %d\n", timer, sid); |
| 1808 |
} |
} |
| 1809 |
} |
} |
| 1810 |
else // failed |
else // failed |
| 1835 |
timer++; |
timer++; |
| 1836 |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1837 |
{ |
{ |
| 1838 |
log_error("section_list_try_rw_lock() tried %d times on section %d\n", sid, timer); |
log_error("section_list_try_rw_lock() tried %d times on section %d\n", timer, sid); |
| 1839 |
} |
} |
| 1840 |
} |
} |
| 1841 |
else // failed |
else // failed |