| 3 |
* section_list |
* section_list |
| 4 |
* - data models and basic operations of section and article |
* - data models and basic operations of section and article |
| 5 |
* |
* |
| 6 |
* Copyright (C) 2004-2025 by Leaflet <leaflet@leafok.com> |
* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com> |
| 7 |
*/ |
*/ |
| 8 |
|
|
| 9 |
|
#ifdef HAVE_CONFIG_H |
| 10 |
|
#include "config.h" |
| 11 |
|
#endif |
| 12 |
|
|
| 13 |
#include "log.h" |
#include "log.h" |
| 14 |
#include "section_list.h" |
#include "section_list.h" |
| 15 |
#include "trie_dict.h" |
#include "trie_dict.h" |
| 16 |
#include "user_list.h" |
#include "user_list.h" |
| 17 |
#include <errno.h> |
#include <errno.h> |
| 18 |
|
#include <fcntl.h> |
| 19 |
#include <signal.h> |
#include <signal.h> |
| 20 |
#include <stdio.h> |
#include <stdio.h> |
| 21 |
#include <stdlib.h> |
#include <stdlib.h> |
| 22 |
#include <string.h> |
#include <string.h> |
| 23 |
#include <unistd.h> |
#include <unistd.h> |
| 24 |
#include <sys/ipc.h> |
#include <sys/mman.h> |
| 25 |
#include <sys/param.h> |
#include <sys/param.h> |
| 26 |
#include <sys/sem.h> |
#include <sys/sem.h> |
| 27 |
#include <sys/shm.h> |
#include <sys/stat.h> |
| 28 |
|
|
| 29 |
#ifdef _SEM_SEMUN_UNDEFINED |
#if defined(_SEM_SEMUN_UNDEFINED) || defined(__CYGWIN__) |
| 30 |
union semun |
union semun |
| 31 |
{ |
{ |
| 32 |
int val; /* Value for SETVAL */ |
int val; /* Value for SETVAL */ |
| 35 |
struct seminfo *__buf; /* Buffer for IPC_INFO |
struct seminfo *__buf; /* Buffer for IPC_INFO |
| 36 |
(Linux-specific) */ |
(Linux-specific) */ |
| 37 |
}; |
}; |
| 38 |
#endif // #ifdef _SEM_SEMUN_UNDEFINED |
#endif // #if defined(_SEM_SEMUN_UNDEFINED) |
| 39 |
|
|
| 40 |
#define SECTION_TRY_LOCK_WAIT_TIME 1 // second |
enum _section_list_constant_t |
| 41 |
#define SECTION_TRY_LOCK_TIMES 10 |
{ |
| 42 |
|
SECTION_TRY_LOCK_WAIT_TIME = 1, // second |
| 43 |
|
SECTION_TRY_LOCK_TIMES = 10, |
| 44 |
|
|
| 45 |
#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 |
| 46 |
#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) |
| 47 |
#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), |
| 48 |
|
|
| 49 |
#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 |
| 50 |
|
|
| 51 |
#define SID_STR_LEN 5 // 32-bit + NULL |
SID_STR_LEN = 5, // 32-bit + NULL |
| 52 |
|
}; |
| 53 |
|
|
| 54 |
struct article_block_t |
struct article_block_t |
| 55 |
{ |
{ |
| 56 |
ARTICLE articles[ARTICLE_PER_BLOCK]; |
ARTICLE articles[BBS_article_count_per_block]; |
| 57 |
int article_count; |
int article_count; |
| 58 |
struct article_block_t *p_next_block; |
struct article_block_t *p_next_block; |
| 59 |
}; |
}; |
| 61 |
|
|
| 62 |
struct article_block_pool_t |
struct article_block_pool_t |
| 63 |
{ |
{ |
| 64 |
int shmid; |
size_t shm_size; |
| 65 |
struct |
struct |
| 66 |
{ |
{ |
| 67 |
int shmid; |
size_t shm_size; |
| 68 |
void *p_shm; |
void *p_shm; |
| 69 |
} shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
} shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
| 70 |
int shm_count; |
int shm_count; |
| 74 |
}; |
}; |
| 75 |
typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
| 76 |
|
|
| 77 |
|
static char article_block_shm_name[FILE_NAME_LEN]; |
| 78 |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
| 79 |
|
|
| 80 |
|
static char section_list_shm_name[FILE_NAME_LEN]; |
| 81 |
SECTION_LIST_POOL *p_section_list_pool = NULL; |
SECTION_LIST_POOL *p_section_list_pool = NULL; |
| 82 |
|
|
| 83 |
int article_block_init(const char *filename, int block_count) |
int article_block_init(const char *filename, int block_count) |
| 84 |
{ |
{ |
| 85 |
int shmid; |
char filepath[FILE_PATH_LEN]; |
| 86 |
int proj_id; |
int fd; |
|
key_t key; |
|
| 87 |
size_t size; |
size_t size; |
| 88 |
void *p_shm; |
void *p_shm; |
| 89 |
int i; |
int i; |
| 103 |
return -2; |
return -2; |
| 104 |
} |
} |
| 105 |
|
|
| 106 |
|
strncpy(filepath, filename, sizeof(filepath) - 1); |
| 107 |
|
filepath[sizeof(filepath) - 1] = '\0'; |
| 108 |
|
snprintf(article_block_shm_name, sizeof(article_block_shm_name), "/ARTICLE_BLOCK_SHM_%s", basename(filepath)); |
| 109 |
|
|
| 110 |
// Allocate shared memory |
// Allocate shared memory |
| 111 |
proj_id = ARTICLE_BLOCK_SHM_COUNT_LIMIT; // keep different from proj_id used to create block shm |
size = sizeof(ARTICLE_BLOCK_POOL); |
| 112 |
key = ftok(filename, proj_id); |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, ARTICLE_BLOCK_SHM_COUNT_LIMIT); |
| 113 |
if (key == -1) |
|
| 114 |
|
if (shm_unlink(filepath) == -1 && errno != ENOENT) |
| 115 |
{ |
{ |
| 116 |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
log_error("shm_unlink(%s) error (%d)\n", filepath, errno); |
| 117 |
return -3; |
return -2; |
| 118 |
} |
} |
| 119 |
|
|
| 120 |
size = sizeof(ARTICLE_BLOCK_POOL); |
if ((fd = shm_open(filepath, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1) |
|
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
|
|
if (shmid == -1) |
|
| 121 |
{ |
{ |
| 122 |
log_error("shmget(article_block_pool_shm, size = %d) error (%d)\n", size, errno); |
log_error("shm_open(%s) error (%d)\n", filepath, errno); |
| 123 |
return -3; |
return -2; |
| 124 |
} |
} |
| 125 |
p_shm = shmat(shmid, NULL, 0); |
if (ftruncate(fd, (off_t)size) == -1) |
|
if (p_shm == (void *)-1) |
|
| 126 |
{ |
{ |
| 127 |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
log_error("ftruncate(size=%d) error (%d)\n", size, errno); |
| 128 |
return -3; |
close(fd); |
| 129 |
|
return -2; |
| 130 |
|
} |
| 131 |
|
|
| 132 |
|
p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L); |
| 133 |
|
if (p_shm == MAP_FAILED) |
| 134 |
|
{ |
| 135 |
|
log_error("mmap() error (%d)\n", errno); |
| 136 |
|
close(fd); |
| 137 |
|
return -2; |
| 138 |
|
} |
| 139 |
|
|
| 140 |
|
if (close(fd) < 0) |
| 141 |
|
{ |
| 142 |
|
log_error("close(fd) error (%d)\n", errno); |
| 143 |
|
return -1; |
| 144 |
} |
} |
| 145 |
|
|
| 146 |
p_article_block_pool = p_shm; |
p_article_block_pool = p_shm; |
| 147 |
p_article_block_pool->shmid = shmid; |
p_article_block_pool->shm_size = size; |
| 148 |
|
|
| 149 |
p_article_block_pool->shm_count = 0; |
p_article_block_pool->shm_count = 0; |
| 150 |
pp_block_next = &(p_article_block_pool->p_block_free_list); |
pp_block_next = &(p_article_block_pool->p_block_free_list); |
| 154 |
block_count_in_shm = MIN(block_count, ARTICLE_BLOCK_PER_SHM); |
block_count_in_shm = MIN(block_count, ARTICLE_BLOCK_PER_SHM); |
| 155 |
block_count -= block_count_in_shm; |
block_count -= block_count_in_shm; |
| 156 |
|
|
| 157 |
proj_id = p_article_block_pool->shm_count; |
size = sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
| 158 |
key = ftok(filename, proj_id); |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, p_article_block_pool->shm_count); |
| 159 |
if (key == -1) |
|
| 160 |
|
if (shm_unlink(filepath) == -1 && errno != ENOENT) |
| 161 |
{ |
{ |
| 162 |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
log_error("shm_unlink(%s) error (%d)\n", filepath, errno); |
| 163 |
article_block_cleanup(); |
return -2; |
|
return -3; |
|
| 164 |
} |
} |
| 165 |
|
|
| 166 |
size = sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
if ((fd = shm_open(filepath, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1) |
|
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
|
|
if (shmid == -1) |
|
| 167 |
{ |
{ |
| 168 |
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); |
| 169 |
article_block_cleanup(); |
return -2; |
|
return -3; |
|
| 170 |
} |
} |
| 171 |
p_shm = shmat(shmid, NULL, 0); |
if (ftruncate(fd, (off_t)size) == -1) |
|
if (p_shm == (void *)-1) |
|
| 172 |
{ |
{ |
| 173 |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
log_error("ftruncate(size=%d) error (%d)\n", size, errno); |
| 174 |
article_block_cleanup(); |
close(fd); |
| 175 |
return -3; |
return -2; |
| 176 |
|
} |
| 177 |
|
|
| 178 |
|
p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L); |
| 179 |
|
if (p_shm == MAP_FAILED) |
| 180 |
|
{ |
| 181 |
|
log_error("mmap() error (%d)\n", errno); |
| 182 |
|
close(fd); |
| 183 |
|
return -2; |
| 184 |
|
} |
| 185 |
|
|
| 186 |
|
if (close(fd) < 0) |
| 187 |
|
{ |
| 188 |
|
log_error("close(fd) error (%d)\n", errno); |
| 189 |
|
return -1; |
| 190 |
} |
} |
| 191 |
|
|
| 192 |
(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->shmid = shmid; |
(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++; |
| 195 |
|
|
| 217 |
|
|
| 218 |
void article_block_cleanup(void) |
void article_block_cleanup(void) |
| 219 |
{ |
{ |
| 220 |
int shmid; |
char filepath[FILE_PATH_LEN]; |
| 221 |
|
|
| 222 |
if (p_article_block_pool == NULL) |
if (p_article_block_pool == NULL) |
| 223 |
{ |
{ |
| 226 |
|
|
| 227 |
for (int i = 0; i < p_article_block_pool->shm_count; i++) |
for (int i = 0; i < p_article_block_pool->shm_count; i++) |
| 228 |
{ |
{ |
| 229 |
if (shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, i); |
|
{ |
|
|
log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
|
|
} |
|
| 230 |
|
|
| 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 |
|
|
| 237 |
shmid = p_article_block_pool->shmid; |
snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, ARTICLE_BLOCK_SHM_COUNT_LIMIT); |
|
|
|
|
if (shmdt(p_article_block_pool) == -1) |
|
|
{ |
|
|
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
|
|
} |
|
| 238 |
|
|
| 239 |
if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1) |
if (shm_unlink(filepath) == -1 && errno != ENOENT) |
| 240 |
{ |
{ |
| 241 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", shmid, errno); |
log_error("shm_unlink(%s) error (%d)\n", filepath, errno); |
| 242 |
} |
} |
| 243 |
|
|
| 244 |
p_article_block_pool = NULL; |
detach_article_block_shm(); |
| 245 |
} |
} |
| 246 |
|
|
| 247 |
int set_article_block_shm_readonly(void) |
int set_article_block_shm_readonly(void) |
| 248 |
{ |
{ |
|
int shmid; |
|
|
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 |
|
|
p_shm = shmat(shmid, (p_article_block_pool->shm_pool + i)->p_shm, SHM_RDONLY | SHM_REMAP); |
|
|
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 |
|
|
| 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 (shmid != 0 && 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 |
|
|
| 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; |
| 1091 |
} |
} |
| 1092 |
|
|
| 1093 |
page_count = p_section->page_count - 1 + |
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 ? 1 : 0); |
BBS_article_limit_per_page; |
| 1096 |
|
|
| 1097 |
if (page_count < 0) |
if (page_count < 0) |
| 1098 |
{ |
{ |
| 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; |
| 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; |