| 14 |
* * |
* * |
| 15 |
***************************************************************************/ |
***************************************************************************/ |
| 16 |
|
|
| 17 |
|
#define _GNU_SOURCE |
| 18 |
|
|
| 19 |
#include "section_list.h" |
#include "section_list.h" |
| 20 |
#include "log.h" |
#include "log.h" |
|
#include "io.h" |
|
| 21 |
#include "trie_dict.h" |
#include "trie_dict.h" |
| 22 |
#include <stdio.h> |
#include <stdio.h> |
| 23 |
#include <string.h> |
#include <string.h> |
| 25 |
#include <unistd.h> |
#include <unistd.h> |
| 26 |
#include <stdlib.h> |
#include <stdlib.h> |
| 27 |
#include <errno.h> |
#include <errno.h> |
| 28 |
|
#include <sys/param.h> |
| 29 |
|
#include <sys/sem.h> |
| 30 |
#include <sys/shm.h> |
#include <sys/shm.h> |
| 31 |
#include <sys/ipc.h> |
#include <sys/ipc.h> |
| 32 |
|
|
| 33 |
// ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT should be |
#ifdef _SEM_SEMUN_UNDEFINED |
| 34 |
// no less than BBS_article_block_limit_per_section * BBS_max_section, |
union semun |
| 35 |
// in order to allocate enough memory for blocks |
{ |
| 36 |
#define ARTICLE_BLOCK_PER_SHM 50 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
int val; /* Value for SETVAL */ |
| 37 |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 256 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
struct semid_ds *buf; /* Buffer for IPC_STAT, IPC_SET */ |
| 38 |
|
unsigned short *array; /* Array for GETALL, SETALL */ |
| 39 |
|
struct seminfo *__buf; /* Buffer for IPC_INFO |
| 40 |
|
(Linux-specific) */ |
| 41 |
|
}; |
| 42 |
|
#endif // #ifdef _SEM_SEMUN_UNDEFINED |
| 43 |
|
|
| 44 |
|
#define ARTICLE_BLOCK_PER_SHM 400 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
| 45 |
|
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 200 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
| 46 |
|
#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
| 47 |
|
|
| 48 |
|
#define CALCULATE_PAGE_THRESHOLD 100 // Adjust to tune performance of move topic |
| 49 |
|
|
| 50 |
|
#define SID_STR_LEN 5 // 32-bit + NULL |
| 51 |
|
|
| 52 |
|
struct article_block_t |
| 53 |
|
{ |
| 54 |
|
ARTICLE articles[ARTICLE_PER_BLOCK]; |
| 55 |
|
int32_t article_count; |
| 56 |
|
struct article_block_t *p_next_block; |
| 57 |
|
}; |
| 58 |
|
typedef struct article_block_t ARTICLE_BLOCK; |
| 59 |
|
|
| 60 |
struct article_block_shm_t |
struct article_block_shm_t |
| 61 |
{ |
{ |
| 64 |
}; |
}; |
| 65 |
typedef struct article_block_shm_t ARTICLE_BLOCK_SHM; |
typedef struct article_block_shm_t ARTICLE_BLOCK_SHM; |
| 66 |
|
|
| 67 |
static ARTICLE_BLOCK_SHM *p_article_block_shm_pool; |
struct article_block_pool_t |
| 68 |
static int article_block_shm_count; |
{ |
| 69 |
static ARTICLE_BLOCK *p_article_block_free_list; |
ARTICLE_BLOCK_SHM shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
| 70 |
|
int shm_count; |
| 71 |
static SECTION_DATA *p_section_data_pool; |
ARTICLE_BLOCK *p_block_free_list; |
| 72 |
static int section_data_count; |
ARTICLE_BLOCK *p_block[ARTICLE_BLOCK_PER_POOL]; |
| 73 |
static TRIE_NODE *p_trie_dict_section_data; |
int32_t block_count; |
| 74 |
|
}; |
| 75 |
|
typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
| 76 |
|
|
| 77 |
|
static int article_block_pool_shmid; |
| 78 |
|
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
| 79 |
|
|
| 80 |
|
static int section_list_pool_semid; |
| 81 |
|
static int section_list_pool_shmid; |
| 82 |
|
static SECTION_LIST *p_section_list_pool = NULL; |
| 83 |
|
|
| 84 |
int section_data_pool_init(const char *filename, int article_block_count) |
static int section_list_count = 0; |
| 85 |
|
static TRIE_NODE *p_trie_dict_section_by_name = NULL; |
| 86 |
|
static TRIE_NODE *p_trie_dict_section_by_sid = NULL; |
| 87 |
|
|
| 88 |
|
int article_block_init(const char *filename, int block_count) |
| 89 |
{ |
{ |
| 90 |
int shmid; |
int shmid; |
| 91 |
int proj_id; |
int proj_id; |
| 93 |
size_t size; |
size_t size; |
| 94 |
void *p_shm; |
void *p_shm; |
| 95 |
int i; |
int i; |
| 96 |
int article_block_count_in_shm; |
int block_count_in_shm; |
| 97 |
ARTICLE_BLOCK *p_article_block_in_shm; |
ARTICLE_BLOCK *p_block_in_shm; |
| 98 |
ARTICLE_BLOCK **pp_article_block_next; |
ARTICLE_BLOCK **pp_block_next; |
| 99 |
|
|
| 100 |
if (p_article_block_shm_pool != NULL || |
if (p_article_block_pool != NULL) |
|
p_article_block_free_list != NULL || |
|
|
p_section_data_pool != NULL || |
|
|
p_trie_dict_section_data != NULL) |
|
| 101 |
{ |
{ |
| 102 |
log_error("section_data_pool already initialized\n"); |
log_error("article_block_pool already initialized\n"); |
| 103 |
return -1; |
return -1; |
| 104 |
} |
} |
| 105 |
|
|
| 106 |
if (article_block_count > ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
if (block_count > ARTICLE_BLOCK_PER_POOL) |
| 107 |
{ |
{ |
| 108 |
log_error("article_block_count exceed limit %d\n", ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT); |
log_error("article_block_count exceed limit %d\n", ARTICLE_BLOCK_PER_POOL); |
| 109 |
return -2; |
return -2; |
| 110 |
} |
} |
| 111 |
|
|
| 112 |
p_article_block_shm_pool = calloc((size_t)article_block_count / ARTICLE_BLOCK_PER_SHM + 1, sizeof(ARTICLE_BLOCK_SHM)); |
// Allocate shared memory |
| 113 |
if (p_article_block_shm_pool == NULL) |
proj_id = ARTICLE_BLOCK_SHM_COUNT_LIMIT; // keep different from proj_id used to create block shm |
| 114 |
|
key = ftok(filename, proj_id); |
| 115 |
|
if (key == -1) |
| 116 |
{ |
{ |
| 117 |
log_error("calloc(%d ARTICLE_BLOCK_SHM) OOM\n", article_block_count / ARTICLE_BLOCK_PER_SHM + 1); |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
| 118 |
return -2; |
return -3; |
| 119 |
} |
} |
| 120 |
|
|
| 121 |
p_section_data_pool = calloc(BBS_max_section, sizeof(SECTION_DATA)); |
size = sizeof(ARTICLE_BLOCK_POOL); |
| 122 |
if (p_section_data_pool == NULL) |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
| 123 |
|
if (shmid == -1) |
| 124 |
{ |
{ |
| 125 |
log_error("calloc(%d SECTION_DATA) OOM\n", BBS_max_section); |
log_error("shmget(article_block_pool_shm, size = %d) error (%d)\n", size, errno); |
| 126 |
return -2; |
return -3; |
| 127 |
} |
} |
| 128 |
section_data_count = 0; |
p_shm = shmat(shmid, NULL, 0); |
| 129 |
|
if (p_shm == (void *)-1) |
|
p_trie_dict_section_data = trie_dict_create(); |
|
|
if (p_trie_dict_section_data == NULL) |
|
| 130 |
{ |
{ |
| 131 |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
| 132 |
return -2; |
return -3; |
| 133 |
} |
} |
| 134 |
|
|
| 135 |
// Allocate shared memory |
article_block_pool_shmid = shmid; |
| 136 |
article_block_shm_count = 0; |
p_article_block_pool = p_shm; |
| 137 |
pp_article_block_next = &p_article_block_free_list; |
|
| 138 |
|
p_article_block_pool->shm_count = 0; |
| 139 |
|
pp_block_next = &(p_article_block_pool->p_block_free_list); |
| 140 |
|
|
| 141 |
while (article_block_count > 0) |
while (block_count > 0) |
| 142 |
{ |
{ |
| 143 |
article_block_count_in_shm = |
block_count_in_shm = MIN(block_count, ARTICLE_BLOCK_PER_SHM); |
| 144 |
(article_block_count < ARTICLE_BLOCK_PER_SHM ? article_block_count : ARTICLE_BLOCK_PER_SHM); |
block_count -= block_count_in_shm; |
|
article_block_count -= article_block_count_in_shm; |
|
| 145 |
|
|
| 146 |
proj_id = getpid() + article_block_shm_count; |
proj_id = p_article_block_pool->shm_count; |
| 147 |
key = ftok(filename, proj_id); |
key = ftok(filename, proj_id); |
| 148 |
if (key == -1) |
if (key == -1) |
| 149 |
{ |
{ |
| 150 |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
| 151 |
section_data_pool_cleanup(); |
article_block_cleanup(); |
| 152 |
return -3; |
return -3; |
| 153 |
} |
} |
| 154 |
|
|
| 155 |
size = sizeof(shmid) + sizeof(ARTICLE_BLOCK) * (size_t)article_block_count_in_shm; |
size = sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
| 156 |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
| 157 |
if (shmid == -1) |
if (shmid == -1) |
| 158 |
{ |
{ |
| 159 |
log_error("shmget(shm_index = %d, size = %d) error (%d)\n", article_block_shm_count, size, errno); |
log_error("shmget(shm_index = %d, size = %d) error (%d)\n", p_article_block_pool->shm_count, size, errno); |
| 160 |
section_data_pool_cleanup(); |
article_block_cleanup(); |
| 161 |
return -3; |
return -3; |
| 162 |
} |
} |
| 163 |
p_shm = shmat(shmid, NULL, 0); |
p_shm = shmat(shmid, NULL, 0); |
| 164 |
if (p_shm == (void *)-1) |
if (p_shm == (void *)-1) |
| 165 |
{ |
{ |
| 166 |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
| 167 |
section_data_pool_cleanup(); |
article_block_cleanup(); |
| 168 |
return -3; |
return -3; |
| 169 |
} |
} |
| 170 |
|
|
| 171 |
(p_article_block_shm_pool + article_block_shm_count)->shmid = shmid; |
(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->shmid = shmid; |
| 172 |
(p_article_block_shm_pool + article_block_shm_count)->p_shm = p_shm; |
(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->p_shm = p_shm; |
| 173 |
article_block_shm_count++; |
p_article_block_pool->shm_count++; |
| 174 |
|
|
| 175 |
p_article_block_in_shm = p_shm; |
p_block_in_shm = p_shm; |
| 176 |
*pp_article_block_next = p_article_block_in_shm; |
*pp_block_next = p_block_in_shm; |
| 177 |
|
|
| 178 |
for (i = 0; i < article_block_count_in_shm; i++) |
for (i = 0; i < block_count_in_shm; i++) |
| 179 |
{ |
{ |
| 180 |
if (i < article_block_count_in_shm - 1) |
if (i < block_count_in_shm - 1) |
| 181 |
{ |
{ |
| 182 |
(p_article_block_in_shm + i)->p_next_block = (p_article_block_in_shm + i + 1); |
(p_block_in_shm + i)->p_next_block = (p_block_in_shm + i + 1); |
| 183 |
} |
} |
| 184 |
else |
else |
| 185 |
{ |
{ |
| 186 |
(p_article_block_in_shm + i)->p_next_block = NULL; |
(p_block_in_shm + i)->p_next_block = NULL; |
| 187 |
pp_article_block_next = &((p_article_block_in_shm + i)->p_next_block); |
pp_block_next = &((p_block_in_shm + i)->p_next_block); |
| 188 |
} |
} |
| 189 |
} |
} |
| 190 |
} |
} |
| 191 |
|
|
| 192 |
|
p_article_block_pool->block_count = 0; |
| 193 |
|
|
| 194 |
return 0; |
return 0; |
| 195 |
} |
} |
| 196 |
|
|
| 197 |
void section_data_pool_cleanup(void) |
void article_block_cleanup(void) |
| 198 |
{ |
{ |
| 199 |
int i; |
if (p_article_block_pool == NULL) |
| 200 |
|
{ |
| 201 |
|
return; |
| 202 |
|
} |
| 203 |
|
|
| 204 |
if (p_trie_dict_section_data != NULL) |
for (int i = 0; i < p_article_block_pool->shm_count; i++) |
| 205 |
{ |
{ |
| 206 |
trie_dict_destroy(p_trie_dict_section_data); |
if (shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
| 207 |
p_trie_dict_section_data = NULL; |
{ |
| 208 |
section_data_count = 0; |
log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
| 209 |
|
} |
| 210 |
|
|
| 211 |
|
if (shmctl((p_article_block_pool->shm_pool + i)->shmid, IPC_RMID, NULL) == -1) |
| 212 |
|
{ |
| 213 |
|
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
| 214 |
|
} |
| 215 |
} |
} |
| 216 |
|
|
| 217 |
if (p_section_data_pool != NULL) |
if (shmdt(p_article_block_pool) == -1) |
| 218 |
{ |
{ |
| 219 |
free(p_section_data_pool); |
log_error("shmdt(shmid = %d) error (%d)\n", article_block_pool_shmid, errno); |
|
p_section_data_pool = NULL; |
|
| 220 |
} |
} |
| 221 |
|
|
| 222 |
if (p_article_block_free_list != NULL) |
if (shmctl(article_block_pool_shmid, IPC_RMID, NULL) == -1) |
| 223 |
{ |
{ |
| 224 |
p_article_block_free_list = NULL; |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", article_block_pool_shmid, errno); |
| 225 |
} |
} |
| 226 |
|
|
| 227 |
if (p_article_block_shm_pool != NULL) |
p_article_block_pool = NULL; |
| 228 |
|
} |
| 229 |
|
|
| 230 |
|
inline static ARTICLE_BLOCK *pop_free_article_block(void) |
| 231 |
|
{ |
| 232 |
|
ARTICLE_BLOCK *p_block = NULL; |
| 233 |
|
|
| 234 |
|
if (p_article_block_pool->p_block_free_list != NULL) |
| 235 |
{ |
{ |
| 236 |
for (i = 0; i < article_block_shm_count; i++) |
p_block = p_article_block_pool->p_block_free_list; |
| 237 |
|
p_article_block_pool->p_block_free_list = p_block->p_next_block; |
| 238 |
|
p_block->p_next_block = NULL; |
| 239 |
|
p_block->article_count = 0; |
| 240 |
|
} |
| 241 |
|
|
| 242 |
|
return p_block; |
| 243 |
|
} |
| 244 |
|
|
| 245 |
|
inline static void push_free_article_block(ARTICLE_BLOCK *p_block) |
| 246 |
|
{ |
| 247 |
|
p_block->p_next_block = p_article_block_pool->p_block_free_list; |
| 248 |
|
p_article_block_pool->p_block_free_list = p_block; |
| 249 |
|
} |
| 250 |
|
|
| 251 |
|
int article_block_reset(void) |
| 252 |
|
{ |
| 253 |
|
ARTICLE_BLOCK *p_block; |
| 254 |
|
|
| 255 |
|
if (p_article_block_pool == NULL) |
| 256 |
|
{ |
| 257 |
|
log_error("article_block_pool not initialized\n"); |
| 258 |
|
return -1; |
| 259 |
|
} |
| 260 |
|
|
| 261 |
|
while (p_article_block_pool->block_count > 0) |
| 262 |
|
{ |
| 263 |
|
p_article_block_pool->block_count--; |
| 264 |
|
p_block = p_article_block_pool->p_block[p_article_block_pool->block_count]; |
| 265 |
|
push_free_article_block(p_block); |
| 266 |
|
} |
| 267 |
|
|
| 268 |
|
return 0; |
| 269 |
|
} |
| 270 |
|
|
| 271 |
|
ARTICLE *article_block_find_by_aid(int32_t aid) |
| 272 |
|
{ |
| 273 |
|
ARTICLE_BLOCK *p_block; |
| 274 |
|
int left; |
| 275 |
|
int right; |
| 276 |
|
int mid; |
| 277 |
|
|
| 278 |
|
if (p_article_block_pool == NULL) |
| 279 |
|
{ |
| 280 |
|
log_error("article_block_pool not initialized\n"); |
| 281 |
|
return NULL; |
| 282 |
|
} |
| 283 |
|
|
| 284 |
|
if (p_article_block_pool->block_count == 0) // empty |
| 285 |
|
{ |
| 286 |
|
return NULL; |
| 287 |
|
} |
| 288 |
|
|
| 289 |
|
left = 0; |
| 290 |
|
right = p_article_block_pool->block_count; |
| 291 |
|
|
| 292 |
|
// aid in the range [ head aid of blocks[left], tail aid of blocks[right - 1] ] |
| 293 |
|
while (left < right - 1) |
| 294 |
|
{ |
| 295 |
|
// get block offset no less than mid value of left and right block offsets |
| 296 |
|
mid = (left + right) / 2 + (right - left) % 2; |
| 297 |
|
|
| 298 |
|
if (mid >= p_article_block_pool->block_count) |
| 299 |
{ |
{ |
| 300 |
if (shmdt((p_article_block_shm_pool + i)->p_shm) == -1) |
log_error("block(mid = %d) is out of boundary\n", mid); |
| 301 |
{ |
return NULL; |
| 302 |
log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_shm_pool + i)->shmid, errno); |
} |
|
} |
|
| 303 |
|
|
| 304 |
if (shmctl((p_article_block_shm_pool + i)->shmid, IPC_RMID, NULL) == -1) |
if (aid < p_article_block_pool->p_block[mid]->articles[0].aid) |
| 305 |
{ |
{ |
| 306 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", (p_article_block_shm_pool + i)->shmid, errno); |
right = mid; |
| 307 |
} |
} |
| 308 |
|
else |
| 309 |
|
{ |
| 310 |
|
left = mid; |
| 311 |
} |
} |
| 312 |
|
} |
| 313 |
|
|
| 314 |
|
p_block = p_article_block_pool->p_block[left]; |
| 315 |
|
|
| 316 |
|
left = 0; |
| 317 |
|
right = p_block->article_count - 1; |
| 318 |
|
|
| 319 |
p_article_block_shm_pool = NULL; |
// aid in the range [ aid of articles[left], aid of articles[right] ] |
| 320 |
article_block_shm_count = 0; |
while (left < right) |
| 321 |
|
{ |
| 322 |
|
mid = (left + right) / 2; |
| 323 |
|
|
| 324 |
|
if (aid <= p_block->articles[mid].aid) |
| 325 |
|
{ |
| 326 |
|
right = mid; |
| 327 |
|
} |
| 328 |
|
else |
| 329 |
|
{ |
| 330 |
|
left = mid + 1; |
| 331 |
|
} |
| 332 |
} |
} |
| 333 |
|
|
| 334 |
|
return (p_block->articles + left); |
| 335 |
} |
} |
| 336 |
|
|
| 337 |
inline static ARTICLE_BLOCK *pop_free_article_block(void) |
ARTICLE *article_block_find_by_index(int index) |
| 338 |
|
{ |
| 339 |
|
ARTICLE_BLOCK *p_block; |
| 340 |
|
|
| 341 |
|
if (p_article_block_pool == NULL) |
| 342 |
|
{ |
| 343 |
|
log_error("article_block_pool not initialized\n"); |
| 344 |
|
return NULL; |
| 345 |
|
} |
| 346 |
|
|
| 347 |
|
if (index < 0 || index / ARTICLE_PER_BLOCK >= p_article_block_pool->block_count) |
| 348 |
|
{ |
| 349 |
|
log_error("article_block_find_by_index(%d) is out of boundary of block [0, %d)\n", index, p_article_block_pool->block_count); |
| 350 |
|
return NULL; |
| 351 |
|
} |
| 352 |
|
|
| 353 |
|
p_block = p_article_block_pool->p_block[index / ARTICLE_PER_BLOCK]; |
| 354 |
|
|
| 355 |
|
if (index % ARTICLE_PER_BLOCK >= p_block->article_count) |
| 356 |
|
{ |
| 357 |
|
log_error("article_block_find_by_index(%d) is out of boundary of article [0, %d)\n", index, p_block->article_count); |
| 358 |
|
return NULL; |
| 359 |
|
} |
| 360 |
|
|
| 361 |
|
return (p_block->articles + (index % ARTICLE_PER_BLOCK)); |
| 362 |
|
} |
| 363 |
|
|
| 364 |
|
extern int section_list_init(const char *filename) |
| 365 |
{ |
{ |
| 366 |
ARTICLE_BLOCK *p_article_block = NULL; |
int semid; |
| 367 |
|
int shmid; |
| 368 |
|
int proj_id; |
| 369 |
|
key_t key; |
| 370 |
|
size_t size; |
| 371 |
|
void *p_shm; |
| 372 |
|
union semun arg; |
| 373 |
|
int i; |
| 374 |
|
|
| 375 |
|
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL || p_trie_dict_section_by_sid == NULL) |
| 376 |
|
{ |
| 377 |
|
section_list_cleanup(); |
| 378 |
|
} |
| 379 |
|
|
| 380 |
|
proj_id = (int)(time(NULL) % getpid()); |
| 381 |
|
key = ftok(filename, proj_id); |
| 382 |
|
if (key == -1) |
| 383 |
|
{ |
| 384 |
|
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
| 385 |
|
return -3; |
| 386 |
|
} |
| 387 |
|
|
| 388 |
|
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections |
| 389 |
|
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600); |
| 390 |
|
if (semid == -1) |
| 391 |
|
{ |
| 392 |
|
log_error("semget(section_list_pool_sem, size = %d) error (%d)\n", size, errno); |
| 393 |
|
return -3; |
| 394 |
|
} |
| 395 |
|
|
| 396 |
if (p_article_block_free_list != NULL) |
// Initialize sem value to 0 |
| 397 |
|
arg.val = 0; |
| 398 |
|
for (i = 0; i < size; i++) |
| 399 |
{ |
{ |
| 400 |
p_article_block = p_article_block_free_list; |
if (semctl(semid, i, SETVAL, arg) == -1) |
| 401 |
p_article_block_free_list = p_article_block_free_list->p_next_block; |
{ |
| 402 |
|
log_error("semctl(section_list_pool_sem, SETVAL) error (%d)\n", errno); |
| 403 |
|
return -3; |
| 404 |
|
} |
| 405 |
} |
} |
| 406 |
|
|
| 407 |
return p_article_block; |
section_list_pool_semid = semid; |
| 408 |
|
|
| 409 |
|
size = sizeof(SECTION_LIST) * BBS_max_section; |
| 410 |
|
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
| 411 |
|
if (shmid == -1) |
| 412 |
|
{ |
| 413 |
|
log_error("shmget(section_list_pool_shm, size = %d) error (%d)\n", size, errno); |
| 414 |
|
return -3; |
| 415 |
|
} |
| 416 |
|
p_shm = shmat(shmid, NULL, 0); |
| 417 |
|
if (p_shm == (void *)-1) |
| 418 |
|
{ |
| 419 |
|
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
| 420 |
|
return -3; |
| 421 |
|
} |
| 422 |
|
|
| 423 |
|
section_list_pool_shmid = shmid; |
| 424 |
|
p_section_list_pool = p_shm; |
| 425 |
|
section_list_count = 0; |
| 426 |
|
|
| 427 |
|
p_trie_dict_section_by_name = trie_dict_create(); |
| 428 |
|
if (p_trie_dict_section_by_name == NULL) |
| 429 |
|
{ |
| 430 |
|
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 431 |
|
return -2; |
| 432 |
|
} |
| 433 |
|
|
| 434 |
|
p_trie_dict_section_by_sid = trie_dict_create(); |
| 435 |
|
if (p_trie_dict_section_by_sid == NULL) |
| 436 |
|
{ |
| 437 |
|
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 438 |
|
return -2; |
| 439 |
|
} |
| 440 |
|
|
| 441 |
|
return 0; |
| 442 |
} |
} |
| 443 |
|
|
| 444 |
inline static void push_free_article_block(ARTICLE_BLOCK *p_article_block) |
inline static void sid_to_str(int32_t sid, char *p_sid_str) |
| 445 |
{ |
{ |
| 446 |
p_article_block->p_next_block = p_article_block_free_list; |
uint32_t u_sid; |
| 447 |
p_article_block_free_list = p_article_block; |
int i; |
| 448 |
|
|
| 449 |
|
u_sid = (uint32_t)sid; |
| 450 |
|
for (i = 0; i < SID_STR_LEN - 1; i++) |
| 451 |
|
{ |
| 452 |
|
p_sid_str[i] = (char)(u_sid % 255 + 1); |
| 453 |
|
u_sid /= 255; |
| 454 |
|
} |
| 455 |
|
p_sid_str[i] = '\0'; |
| 456 |
} |
} |
| 457 |
|
|
| 458 |
SECTION_DATA *section_data_create(const char *sname, const char *stitle, const char *master_name) |
SECTION_LIST *section_list_create(int32_t sid, const char *sname, const char *stitle, const char *master_name) |
| 459 |
{ |
{ |
| 460 |
SECTION_DATA *p_section; |
SECTION_LIST *p_section; |
| 461 |
int index; |
char sid_str[SID_STR_LEN]; |
| 462 |
|
|
| 463 |
if (p_section_data_pool == NULL || p_trie_dict_section_data == NULL) |
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL || p_trie_dict_section_by_sid == NULL) |
| 464 |
{ |
{ |
| 465 |
log_error("section_data not initialized\n"); |
log_error("session_list_pool not initialized\n"); |
| 466 |
return NULL; |
return NULL; |
| 467 |
} |
} |
| 468 |
|
|
| 469 |
if (section_data_count >= BBS_max_section) |
if (section_list_count >= BBS_max_section) |
| 470 |
{ |
{ |
| 471 |
log_error("section_data_count exceed limit %d\n", BBS_max_section); |
log_error("section_list_count exceed limit %d >= %d\n", section_list_count, BBS_max_section); |
| 472 |
return NULL; |
return NULL; |
| 473 |
} |
} |
| 474 |
|
|
| 475 |
index = section_data_count; |
sid_to_str(sid, sid_str); |
| 476 |
p_section = p_section_data_pool + index; |
|
| 477 |
|
p_section = p_section_list_pool + section_list_count; |
| 478 |
|
|
| 479 |
|
p_section->sid = sid; |
| 480 |
|
|
| 481 |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
| 482 |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
| 487 |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
| 488 |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
| 489 |
|
|
| 490 |
p_section->p_head_block = NULL; |
if (trie_dict_set(p_trie_dict_section_by_name, sname, section_list_count) != 1) |
| 491 |
p_section->p_tail_block = NULL; |
{ |
| 492 |
p_section->block_count = 0; |
log_error("trie_dict_set(section, %s, %d) error\n", sname, section_list_count); |
| 493 |
p_section->article_count = 0; |
return NULL; |
| 494 |
p_section->delete_count = 0; |
} |
| 495 |
|
|
| 496 |
if (trie_dict_set(p_trie_dict_section_data, sname, index) != 1) |
if (trie_dict_set(p_trie_dict_section_by_sid, sid_str, section_list_count) != 1) |
| 497 |
{ |
{ |
| 498 |
log_error("trie_dict_set(section_data, %s, %d) error\n", sname, index); |
log_error("trie_dict_set(section, %d, %d) error\n", sid, section_list_count); |
| 499 |
return NULL; |
return NULL; |
| 500 |
} |
} |
| 501 |
|
|
| 502 |
section_data_count++; |
section_list_reset_articles(p_section); |
| 503 |
|
|
| 504 |
|
section_list_count++; |
| 505 |
|
|
| 506 |
return p_section; |
return p_section; |
| 507 |
} |
} |
| 508 |
|
|
| 509 |
int section_data_free_block(SECTION_DATA *p_section) |
void section_list_reset_articles(SECTION_LIST *p_section) |
| 510 |
{ |
{ |
| 511 |
ARTICLE_BLOCK *p_block; |
p_section->article_count = 0; |
| 512 |
|
p_section->topic_count = 0; |
| 513 |
|
p_section->visible_article_count = 0; |
| 514 |
|
p_section->visible_topic_count = 0; |
| 515 |
|
p_section->p_article_head = NULL; |
| 516 |
|
p_section->p_article_tail = NULL; |
| 517 |
|
|
| 518 |
if (p_section == NULL) |
p_section->page_count = 0; |
| 519 |
|
p_section->last_page_visible_article_count = 0; |
| 520 |
|
} |
| 521 |
|
|
| 522 |
|
void section_list_cleanup(void) |
| 523 |
|
{ |
| 524 |
|
if (p_trie_dict_section_by_name != NULL) |
| 525 |
{ |
{ |
| 526 |
log_error("section_data_free_block() NULL pointer error\n"); |
trie_dict_destroy(p_trie_dict_section_by_name); |
| 527 |
return -1; |
p_trie_dict_section_by_name = NULL; |
| 528 |
} |
} |
| 529 |
|
|
| 530 |
if (p_section_data_pool == NULL) |
if (p_trie_dict_section_by_sid != NULL) |
| 531 |
{ |
{ |
| 532 |
log_error("section_data not initialized\n"); |
trie_dict_destroy(p_trie_dict_section_by_sid); |
| 533 |
return -1; |
p_trie_dict_section_by_sid = NULL; |
| 534 |
} |
} |
| 535 |
|
|
| 536 |
while (p_section->p_head_block != NULL) |
if (p_section_list_pool != NULL) |
| 537 |
{ |
{ |
| 538 |
p_block = p_section->p_head_block; |
if (shmdt(p_section_list_pool) == -1) |
| 539 |
p_section->p_head_block = p_block->p_next_block; |
{ |
| 540 |
push_free_article_block(p_block); |
log_error("shmdt(shmid = %d) error (%d)\n", section_list_pool_shmid, errno); |
| 541 |
|
} |
| 542 |
|
p_section_list_pool = NULL; |
| 543 |
|
|
| 544 |
|
if (shmctl(section_list_pool_shmid, IPC_RMID, NULL) == -1) |
| 545 |
|
{ |
| 546 |
|
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", section_list_pool_shmid, errno); |
| 547 |
|
} |
| 548 |
|
|
| 549 |
|
if (semctl(section_list_pool_semid, 0, IPC_RMID) == -1) |
| 550 |
|
{ |
| 551 |
|
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", section_list_pool_semid, errno); |
| 552 |
|
} |
| 553 |
} |
} |
| 554 |
|
|
| 555 |
p_section->p_tail_block = NULL; |
section_list_count = 0; |
| 556 |
p_section->block_count = 0; |
} |
|
p_section->article_count = 0; |
|
|
p_section->delete_count = 0; |
|
| 557 |
|
|
| 558 |
return 0; |
SECTION_LIST *section_list_find_by_name(const char *sname) |
| 559 |
|
{ |
| 560 |
|
int64_t index; |
| 561 |
|
|
| 562 |
|
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL) |
| 563 |
|
{ |
| 564 |
|
log_error("section_list not initialized\n"); |
| 565 |
|
return NULL; |
| 566 |
|
} |
| 567 |
|
|
| 568 |
|
if (trie_dict_get(p_trie_dict_section_by_name, sname, &index) != 1) |
| 569 |
|
{ |
| 570 |
|
log_error("trie_dict_get(section, %s) error\n", sname); |
| 571 |
|
return NULL; |
| 572 |
|
} |
| 573 |
|
|
| 574 |
|
return (p_section_list_pool + index); |
| 575 |
} |
} |
| 576 |
|
|
| 577 |
SECTION_DATA *section_data_find_by_name(const char *sname) |
SECTION_LIST *section_list_find_by_sid(int32_t sid) |
| 578 |
{ |
{ |
| 579 |
int64_t index; |
int64_t index; |
| 580 |
|
char sid_str[SID_STR_LEN]; |
| 581 |
|
|
| 582 |
if (p_section_data_pool == NULL || p_trie_dict_section_data == NULL) |
if (p_section_list_pool == NULL || p_trie_dict_section_by_sid == NULL) |
| 583 |
{ |
{ |
| 584 |
log_error("section_data not initialized\n"); |
log_error("section_list not initialized\n"); |
| 585 |
return NULL; |
return NULL; |
| 586 |
} |
} |
| 587 |
|
|
| 588 |
if (trie_dict_get(p_trie_dict_section_data, sname, &index) != 1) |
sid_to_str(sid, sid_str); |
| 589 |
|
|
| 590 |
|
if (trie_dict_get(p_trie_dict_section_by_sid, sid_str, &index) != 1) |
| 591 |
{ |
{ |
| 592 |
log_error("trie_dict_get(section_data, %s) error\n", sname); |
log_error("trie_dict_get(section, %d) error\n", sid); |
| 593 |
return NULL; |
return NULL; |
| 594 |
} |
} |
| 595 |
|
|
| 596 |
return (p_section_data_pool + index); |
return (p_section_list_pool + index); |
| 597 |
} |
} |
| 598 |
|
|
| 599 |
int section_data_append_article(SECTION_DATA *p_section, const ARTICLE *p_article) |
int section_list_append_article(SECTION_LIST *p_section, const ARTICLE *p_article_src) |
| 600 |
{ |
{ |
| 601 |
ARTICLE_BLOCK *p_block; |
ARTICLE_BLOCK *p_block; |
| 602 |
int32_t last_aid = 0; |
int32_t last_aid = 0; |
| 603 |
|
ARTICLE *p_article; |
| 604 |
ARTICLE *p_topic_head; |
ARTICLE *p_topic_head; |
| 605 |
ARTICLE *p_topic_tail; |
ARTICLE *p_topic_tail; |
| 606 |
|
|
| 607 |
if (p_section == NULL || p_article == NULL) |
if (p_section == NULL || p_article_src == NULL) |
| 608 |
{ |
{ |
| 609 |
log_error("section_data_append_article() NULL pointer error\n"); |
log_error("section_list_append_article() NULL pointer error\n"); |
| 610 |
return -1; |
return -1; |
| 611 |
} |
} |
| 612 |
|
|
| 613 |
if (p_section_data_pool == NULL) |
if (p_article_block_pool == NULL) |
| 614 |
{ |
{ |
| 615 |
log_error("section_data not initialized\n"); |
log_error("article_block_pool not initialized\n"); |
| 616 |
return -1; |
return -1; |
| 617 |
} |
} |
| 618 |
|
|
| 619 |
if (p_section->p_tail_block == NULL || p_section->p_tail_block->article_count >= BBS_article_limit_per_block) |
if (p_section->sid != p_article_src->sid) |
| 620 |
{ |
{ |
| 621 |
if (p_section->block_count >= BBS_article_block_limit_per_section) |
log_error("section_list_append_article() error: section sid %d != article sid %d\n", p_section->sid, p_article_src->sid); |
| 622 |
{ |
return -2; |
| 623 |
log_error("section block count %d reach limit\n", p_section->block_count); |
} |
|
return -2; |
|
|
} |
|
| 624 |
|
|
| 625 |
|
if (p_section->article_count >= BBS_article_limit_per_section) |
| 626 |
|
{ |
| 627 |
|
log_error("section_list_append_article() error: article_count reach limit in section %d\n", p_section->sid); |
| 628 |
|
return -2; |
| 629 |
|
} |
| 630 |
|
|
| 631 |
|
if (p_article_block_pool->block_count == 0 || |
| 632 |
|
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count >= ARTICLE_PER_BLOCK) |
| 633 |
|
{ |
| 634 |
if ((p_block = pop_free_article_block()) == NULL) |
if ((p_block = pop_free_article_block()) == NULL) |
| 635 |
{ |
{ |
| 636 |
log_error("pop_free_article_block() error\n"); |
log_error("pop_free_article_block() error\n"); |
| 637 |
return -2; |
return -2; |
| 638 |
} |
} |
| 639 |
|
|
| 640 |
p_block->article_count = 0; |
if (p_article_block_pool->block_count > 0) |
|
p_block->p_next_block = NULL; |
|
|
|
|
|
if (p_section->p_tail_block == NULL) |
|
| 641 |
{ |
{ |
| 642 |
p_section->p_head_block = p_block; |
last_aid = p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->articles[ARTICLE_PER_BLOCK - 1].aid; |
|
last_aid = 0; |
|
| 643 |
} |
} |
| 644 |
else |
|
| 645 |
{ |
p_article_block_pool->p_block[p_article_block_pool->block_count] = p_block; |
| 646 |
p_section->p_tail_block->p_next_block = p_block; |
p_article_block_pool->block_count++; |
|
last_aid = p_section->p_tail_block->articles[BBS_article_limit_per_block - 1].aid; |
|
|
} |
|
|
p_section->p_tail_block = p_block; |
|
|
p_section->p_block[p_section->block_count] = p_block; |
|
|
p_section->block_count++; |
|
| 647 |
} |
} |
| 648 |
else |
else |
| 649 |
{ |
{ |
| 650 |
p_block = p_section->p_tail_block; |
p_block = p_article_block_pool->p_block[p_article_block_pool->block_count - 1]; |
| 651 |
last_aid = p_block->articles[p_block->article_count - 1].aid; |
last_aid = p_block->articles[p_block->article_count - 1].aid; |
| 652 |
} |
} |
| 653 |
|
|
| 654 |
// AID of articles should be strictly ascending |
// AID of articles should be strictly ascending |
| 655 |
if (p_article->aid <= last_aid) |
if (p_article_src->aid <= last_aid) |
| 656 |
{ |
{ |
| 657 |
log_error("section_data_append_article(aid=%d) error: last_aid=%d\n", p_article->aid, last_aid); |
log_error("section_list_append_article(aid=%d) error: last_aid=%d\n", p_article_src->aid, last_aid); |
| 658 |
return -3; |
return -3; |
| 659 |
} |
} |
| 660 |
|
|
| 661 |
if (p_block->article_count == 0) |
p_article = (p_block->articles + p_block->article_count); |
| 662 |
|
p_block->article_count++; |
| 663 |
|
p_section->article_count++; |
| 664 |
|
|
| 665 |
|
// Copy article data |
| 666 |
|
*p_article = *p_article_src; |
| 667 |
|
|
| 668 |
|
if (p_article->visible) |
| 669 |
{ |
{ |
| 670 |
p_section->block_head_aid[p_section->block_count - 1] = p_article->aid; |
p_section->visible_article_count++; |
| 671 |
} |
} |
| 672 |
|
|
| 673 |
|
// Link appended article as tail node of topic bi-directional list |
| 674 |
if (p_article->tid != 0) |
if (p_article->tid != 0) |
| 675 |
{ |
{ |
| 676 |
p_topic_head = section_data_find_article_by_aid(p_section, p_article->tid); |
p_topic_head = article_block_find_by_aid(p_article->tid); |
| 677 |
if (p_topic_head == NULL) |
if (p_topic_head == NULL) |
| 678 |
{ |
{ |
| 679 |
log_error("search head of topic (aid=%d) error\n", p_article->tid); |
log_error("search head of topic (aid=%d) error\n", p_article->tid); |
| 680 |
return -4; |
return -4; |
| 681 |
} |
} |
| 682 |
|
|
| 683 |
p_topic_tail = section_data_find_article_by_aid(p_section, p_topic_head->prior_aid); |
p_topic_tail = p_topic_head->p_topic_prior; |
| 684 |
if (p_topic_tail == NULL) |
if (p_topic_tail == NULL) |
| 685 |
{ |
{ |
| 686 |
log_error("search tail of topic (aid=%d) error\n", p_topic_head->prior_aid); |
log_error("tail of topic (aid=%d) is NULL\n", p_article->tid); |
| 687 |
return -4; |
return -4; |
| 688 |
} |
} |
| 689 |
} |
} |
| 690 |
else |
else |
| 691 |
{ |
{ |
| 692 |
p_topic_head = &(p_block->articles[p_block->article_count]); |
p_section->topic_count++; |
| 693 |
p_topic_tail = p_topic_head; |
|
| 694 |
|
if (p_article->visible) |
| 695 |
|
{ |
| 696 |
|
p_section->visible_topic_count++; |
| 697 |
|
} |
| 698 |
|
|
| 699 |
|
p_topic_head = p_article; |
| 700 |
|
p_topic_tail = p_article; |
| 701 |
} |
} |
| 702 |
|
|
| 703 |
// Copy article data |
p_article->p_topic_prior = p_topic_tail; |
| 704 |
p_block->articles[p_block->article_count] = *p_article; |
p_article->p_topic_next = p_topic_head; |
| 705 |
|
p_topic_head->p_topic_prior = p_article; |
| 706 |
|
p_topic_tail->p_topic_next = p_article; |
| 707 |
|
|
| 708 |
// Link appended article as tail node of topic bi-directional list; |
// Link appended article as tail node of article bi-directional list |
| 709 |
p_block->articles[p_block->article_count].prior_aid = p_topic_tail->aid; |
if (p_section->p_article_head == NULL) |
| 710 |
p_block->articles[p_block->article_count].next_aid = p_topic_head->aid; |
{ |
| 711 |
p_topic_head->prior_aid = p_article->aid; |
p_section->p_article_head = p_article; |
| 712 |
p_topic_tail->next_aid = p_article->aid; |
p_section->p_article_tail = p_article; |
| 713 |
|
} |
| 714 |
|
p_article->p_prior = p_section->p_article_tail; |
| 715 |
|
p_article->p_next = p_section->p_article_head; |
| 716 |
|
p_section->p_article_head->p_prior = p_article; |
| 717 |
|
p_section->p_article_tail->p_next = p_article; |
| 718 |
|
p_section->p_article_tail = p_article; |
| 719 |
|
|
| 720 |
p_block->article_count++; |
// Update page |
| 721 |
p_section->article_count++; |
if ((p_article->visible && p_section->last_page_visible_article_count % BBS_article_limit_per_page == 0) || |
| 722 |
|
p_section->article_count == 1) |
| 723 |
|
{ |
| 724 |
|
p_section->p_page_first_article[p_section->page_count] = p_article; |
| 725 |
|
p_section->page_count++; |
| 726 |
|
p_section->last_page_visible_article_count = 0; |
| 727 |
|
} |
| 728 |
|
|
| 729 |
|
if (p_article->visible) |
| 730 |
|
{ |
| 731 |
|
p_section->last_page_visible_article_count++; |
| 732 |
|
} |
| 733 |
|
|
| 734 |
return 0; |
return 0; |
| 735 |
} |
} |
| 736 |
|
|
| 737 |
ARTICLE *section_data_find_article_by_aid(SECTION_DATA *p_section, int32_t aid) |
int section_list_set_article_visible(SECTION_LIST *p_section, int32_t aid, int8_t visible) |
| 738 |
|
{ |
| 739 |
|
ARTICLE *p_article; |
| 740 |
|
ARTICLE *p_reply; |
| 741 |
|
int affected_count = 0; |
| 742 |
|
|
| 743 |
|
if (p_section == NULL) |
| 744 |
|
{ |
| 745 |
|
log_error("section_list_set_article_visible() NULL pointer error\n"); |
| 746 |
|
return -2; |
| 747 |
|
} |
| 748 |
|
|
| 749 |
|
p_article = article_block_find_by_aid(aid); |
| 750 |
|
if (p_article == NULL) |
| 751 |
|
{ |
| 752 |
|
return -1; // Not found |
| 753 |
|
} |
| 754 |
|
|
| 755 |
|
if (p_section->sid != p_article->sid) |
| 756 |
|
{ |
| 757 |
|
log_error("section_list_set_article_visible() error: section sid %d != article sid %d\n", p_section->sid, p_article->sid); |
| 758 |
|
return -2; |
| 759 |
|
} |
| 760 |
|
|
| 761 |
|
if (p_article->visible == visible) |
| 762 |
|
{ |
| 763 |
|
return 0; // Already set |
| 764 |
|
} |
| 765 |
|
|
| 766 |
|
if (visible == 0) // 1 -> 0 |
| 767 |
|
{ |
| 768 |
|
p_section->visible_article_count--; |
| 769 |
|
|
| 770 |
|
if (p_article->tid == 0) |
| 771 |
|
{ |
| 772 |
|
p_section->visible_topic_count--; |
| 773 |
|
|
| 774 |
|
// Set related visible replies to invisible |
| 775 |
|
for (p_reply = p_article->p_topic_next; p_reply->tid != 0; p_reply = p_reply->p_topic_next) |
| 776 |
|
{ |
| 777 |
|
if (p_reply->tid != aid) |
| 778 |
|
{ |
| 779 |
|
log_error("Inconsistent tid = %d found in reply %d of topic %d\n", p_reply->tid, p_reply->aid, aid); |
| 780 |
|
continue; |
| 781 |
|
} |
| 782 |
|
|
| 783 |
|
if (p_reply->visible == 1) |
| 784 |
|
{ |
| 785 |
|
p_reply->visible = 0; |
| 786 |
|
p_section->visible_article_count--; |
| 787 |
|
affected_count++; |
| 788 |
|
} |
| 789 |
|
} |
| 790 |
|
} |
| 791 |
|
} |
| 792 |
|
else // 0 -> 1 |
| 793 |
|
{ |
| 794 |
|
p_section->visible_article_count++; |
| 795 |
|
|
| 796 |
|
if (p_article->tid == 0) |
| 797 |
|
{ |
| 798 |
|
p_section->visible_topic_count++; |
| 799 |
|
} |
| 800 |
|
} |
| 801 |
|
|
| 802 |
|
p_article->visible = visible; |
| 803 |
|
affected_count++; |
| 804 |
|
|
| 805 |
|
return affected_count; |
| 806 |
|
} |
| 807 |
|
|
| 808 |
|
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) |
| 809 |
{ |
{ |
| 810 |
ARTICLE *p_article; |
ARTICLE *p_article; |
|
ARTICLE_BLOCK *p_block; |
|
| 811 |
int left; |
int left; |
| 812 |
int right; |
int right; |
| 813 |
int mid; |
int mid; |
| 814 |
|
|
| 815 |
|
*p_page = -1; |
| 816 |
|
*p_offset = -1; |
| 817 |
|
*pp_next = NULL; |
| 818 |
|
|
| 819 |
if (p_section == NULL) |
if (p_section == NULL) |
| 820 |
{ |
{ |
| 821 |
log_error("section_data_find_article_by_aid() NULL pointer error\n"); |
log_error("section_list_find_article_with_offset() NULL pointer error\n"); |
| 822 |
return NULL; |
return NULL; |
| 823 |
} |
} |
| 824 |
|
|
| 825 |
if (p_section->block_count == 0) // empty section |
if (p_section->article_count == 0) // empty |
| 826 |
{ |
{ |
| 827 |
|
*p_page = 0; |
| 828 |
|
*p_offset = 0; |
| 829 |
return NULL; |
return NULL; |
| 830 |
} |
} |
| 831 |
|
|
| 832 |
left = 0; |
left = 0; |
| 833 |
right = p_section->block_count; |
right = p_section->page_count; |
| 834 |
|
|
| 835 |
// aid in the range [ head aid of blocks[left], tail aid of blocks[right - 1] ] |
// aid in the range [ head aid of pages[left], tail aid of pages[right - 1] ] |
| 836 |
while (left < right - 1) |
while (left < right - 1) |
| 837 |
{ |
{ |
| 838 |
// get block offset no less than mid value of left and right block offsets |
// get page id no less than mid value of left page id and right page id |
| 839 |
mid = (left + right) / 2 + (right - left) % 2; |
mid = (left + right) / 2 + (right - left) % 2; |
| 840 |
|
|
| 841 |
if (mid >= BBS_article_block_limit_per_section) |
if (mid >= p_section->page_count) |
| 842 |
{ |
{ |
| 843 |
log_error("block_m(%d) is out of boundary\n", mid); |
log_error("page id (mid = %d) is out of boundary\n", mid); |
| 844 |
return NULL; |
return NULL; |
| 845 |
} |
} |
| 846 |
|
|
| 847 |
if (aid < p_section->block_head_aid[mid]) |
if (aid < p_section->p_page_first_article[mid]->aid) |
| 848 |
{ |
{ |
| 849 |
right = mid; |
right = mid; |
| 850 |
} |
} |
| 854 |
} |
} |
| 855 |
} |
} |
| 856 |
|
|
| 857 |
p_block = p_section->p_block[left]; |
*p_page = left; |
| 858 |
|
|
| 859 |
|
p_article = p_section->p_page_first_article[*p_page]; |
| 860 |
|
|
| 861 |
|
// p_section->p_page_first_article[*p_page]->aid <= aid < p_section->p_page_first_article[*p_page + 1]->aid |
| 862 |
|
right = (*p_page == MAX(0, p_section->page_count - 1) ? INT32_MAX : p_section->p_page_first_article[*p_page + 1]->aid); |
| 863 |
|
|
| 864 |
|
// left will be the offset of article found or offset to insert |
| 865 |
left = 0; |
left = 0; |
|
right = p_block->article_count - 1; |
|
| 866 |
|
|
| 867 |
// aid in the range [ aid of articles[left], aid of articles[right] ] |
while (aid > p_article->aid) |
|
while (left < right) |
|
| 868 |
{ |
{ |
| 869 |
mid = (left + right) / 2; |
p_article = p_article->p_next; |
| 870 |
|
left++; |
| 871 |
|
|
| 872 |
if (aid <= p_block->articles[mid].aid) |
if (aid == p_article->aid) |
| 873 |
{ |
{ |
| 874 |
right = mid; |
*pp_next = p_article->p_next; |
| 875 |
|
break; |
| 876 |
} |
} |
| 877 |
else |
|
| 878 |
|
// over last article in the page |
| 879 |
|
if (p_article == p_section->p_article_head || p_article->aid >= right) |
| 880 |
{ |
{ |
| 881 |
left = mid + 1; |
*pp_next = (p_article == p_section->p_article_head ? p_section->p_article_head : p_section->p_page_first_article[*p_page + 1]); |
| 882 |
|
*p_offset = left; |
| 883 |
|
return NULL; // not found |
| 884 |
} |
} |
| 885 |
} |
} |
| 886 |
|
|
| 887 |
p_article = &(p_block->articles[left]); |
if (aid < p_article->aid) |
| 888 |
|
{ |
| 889 |
|
*pp_next = p_article; |
| 890 |
|
p_article = NULL; // not found |
| 891 |
|
} |
| 892 |
|
else // aid == p_article->aid |
| 893 |
|
{ |
| 894 |
|
*pp_next = p_article->p_next; |
| 895 |
|
} |
| 896 |
|
|
| 897 |
|
*p_offset = left; |
| 898 |
|
|
| 899 |
return p_article; |
return p_article; |
| 900 |
} |
} |
| 901 |
|
|
| 902 |
ARTICLE *section_data_find_article_by_index(SECTION_DATA *p_section, int index) |
int section_list_calculate_page(SECTION_LIST *p_section, int32_t start_aid) |
| 903 |
{ |
{ |
| 904 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 905 |
ARTICLE_BLOCK *p_block; |
ARTICLE *p_next; |
| 906 |
|
int32_t page; |
| 907 |
|
int32_t offset; |
| 908 |
|
int visible_article_count; |
| 909 |
|
int page_head_set; |
| 910 |
|
|
| 911 |
if (p_section == NULL) |
if (p_section == NULL) |
| 912 |
{ |
{ |
| 913 |
log_error("section_data_find_article_by_index() NULL pointer error\n"); |
log_error("section_list_calculate_page() NULL pointer error\n"); |
| 914 |
return NULL; |
return -1; |
| 915 |
} |
} |
| 916 |
|
|
| 917 |
if (index < 0 || index >= p_section->article_count) |
if (p_section->article_count == 0) // empty |
| 918 |
{ |
{ |
| 919 |
log_error("section_data_find_article_by_index(%d) is out of boundary [0, %d)\n", index, p_section->article_count); |
p_section->page_count = 0; |
| 920 |
return NULL; |
p_section->last_page_visible_article_count = 0; |
| 921 |
|
|
| 922 |
|
return 0; |
| 923 |
} |
} |
| 924 |
|
|
| 925 |
p_block = p_section->p_block[index / BBS_article_limit_per_block]; |
if (start_aid > 0) |
| 926 |
p_article = &(p_block->articles[index % BBS_article_limit_per_block]); |
{ |
| 927 |
|
p_article = article_block_find_by_aid(start_aid); |
| 928 |
|
if (p_article == NULL) |
| 929 |
|
{ |
| 930 |
|
return -1; // Not found |
| 931 |
|
} |
| 932 |
|
|
| 933 |
return p_article; |
if (p_section->sid != p_article->sid) |
| 934 |
|
{ |
| 935 |
|
log_error("section_list_calculate_page() error: section sid %d != start article sid %d\n", p_section->sid, p_article->sid); |
| 936 |
|
return -2; |
| 937 |
|
} |
| 938 |
|
|
| 939 |
|
p_article = section_list_find_article_with_offset(p_section, start_aid, &page, &offset, &p_next); |
| 940 |
|
if (p_article == NULL) |
| 941 |
|
{ |
| 942 |
|
if (page < 0) |
| 943 |
|
{ |
| 944 |
|
return -1; |
| 945 |
|
} |
| 946 |
|
log_error("section_list_calculate_page() aid = %d not found in section sid = %d\n", |
| 947 |
|
start_aid, p_section->sid); |
| 948 |
|
return -2; |
| 949 |
|
} |
| 950 |
|
|
| 951 |
|
if (offset > 0) |
| 952 |
|
{ |
| 953 |
|
p_article = p_section->p_page_first_article[page]; |
| 954 |
|
} |
| 955 |
|
} |
| 956 |
|
else |
| 957 |
|
{ |
| 958 |
|
p_article = p_section->p_article_head; |
| 959 |
|
page = 0; |
| 960 |
|
offset = 0; |
| 961 |
|
} |
| 962 |
|
|
| 963 |
|
visible_article_count = 0; |
| 964 |
|
page_head_set = 0; |
| 965 |
|
|
| 966 |
|
do |
| 967 |
|
{ |
| 968 |
|
if (!page_head_set && visible_article_count == 0) |
| 969 |
|
{ |
| 970 |
|
p_section->p_page_first_article[page] = p_article; |
| 971 |
|
page_head_set = 1; |
| 972 |
|
} |
| 973 |
|
|
| 974 |
|
if (p_article->visible) |
| 975 |
|
{ |
| 976 |
|
visible_article_count++; |
| 977 |
|
} |
| 978 |
|
|
| 979 |
|
p_article = p_article->p_next; |
| 980 |
|
|
| 981 |
|
// skip remaining invisible articles |
| 982 |
|
while (p_article->visible == 0 && p_article != p_section->p_article_head) |
| 983 |
|
{ |
| 984 |
|
p_article = p_article->p_next; |
| 985 |
|
} |
| 986 |
|
|
| 987 |
|
if (visible_article_count >= BBS_article_limit_per_page && p_article != p_section->p_article_head) |
| 988 |
|
{ |
| 989 |
|
page++; |
| 990 |
|
visible_article_count = 0; |
| 991 |
|
page_head_set = 0; |
| 992 |
|
|
| 993 |
|
if (page >= BBS_article_limit_per_section / BBS_article_limit_per_page && p_article != p_section->p_article_head) |
| 994 |
|
{ |
| 995 |
|
log_error("Count of page exceed limit in section %d\n", p_section->sid); |
| 996 |
|
break; |
| 997 |
|
} |
| 998 |
|
} |
| 999 |
|
} while (p_article != p_section->p_article_head); |
| 1000 |
|
|
| 1001 |
|
p_section->page_count = page + (visible_article_count > 0 ? 1 : 0); |
| 1002 |
|
p_section->last_page_visible_article_count = visible_article_count; |
| 1003 |
|
|
| 1004 |
|
return 0; |
| 1005 |
|
} |
| 1006 |
|
|
| 1007 |
|
int article_count_of_topic(int32_t aid) |
| 1008 |
|
{ |
| 1009 |
|
ARTICLE *p_article; |
| 1010 |
|
int article_count; |
| 1011 |
|
|
| 1012 |
|
p_article = article_block_find_by_aid(aid); |
| 1013 |
|
if (p_article == NULL) |
| 1014 |
|
{ |
| 1015 |
|
return 0; // Not found |
| 1016 |
|
} |
| 1017 |
|
|
| 1018 |
|
article_count = 0; |
| 1019 |
|
|
| 1020 |
|
do |
| 1021 |
|
{ |
| 1022 |
|
if (p_article->tid != 0 && p_article->tid != aid) |
| 1023 |
|
{ |
| 1024 |
|
log_error("article_count_of_topic(%d) error: article %d not linked to the topic\n", aid, p_article->aid); |
| 1025 |
|
break; |
| 1026 |
|
} |
| 1027 |
|
|
| 1028 |
|
article_count++; |
| 1029 |
|
p_article = p_article->p_topic_next; |
| 1030 |
|
} while (p_article->aid != aid); |
| 1031 |
|
|
| 1032 |
|
return article_count; |
| 1033 |
} |
} |
| 1034 |
|
|
| 1035 |
int section_data_mark_del_article(SECTION_DATA *p_section, int32_t aid) |
int section_list_move_topic(SECTION_LIST *p_section_src, SECTION_LIST *p_section_dest, int32_t aid) |
| 1036 |
{ |
{ |
| 1037 |
ARTICLE *p_article; |
ARTICLE *p_article; |
| 1038 |
|
ARTICLE *p_next; |
| 1039 |
|
int32_t page; |
| 1040 |
|
int32_t offset; |
| 1041 |
|
int32_t move_article_count; |
| 1042 |
|
int32_t dest_article_count_old; |
| 1043 |
|
int32_t last_unaffected_aid_src; |
| 1044 |
|
int32_t first_inserted_aid_dest; |
| 1045 |
|
int move_counter; |
| 1046 |
|
|
| 1047 |
|
if (p_section_dest == NULL) |
| 1048 |
|
{ |
| 1049 |
|
log_error("section_list_move_topic() NULL pointer error\n"); |
| 1050 |
|
return -1; |
| 1051 |
|
} |
| 1052 |
|
|
| 1053 |
|
if ((p_article = article_block_find_by_aid(aid)) == NULL) |
| 1054 |
|
{ |
| 1055 |
|
log_error("section_list_move_topic() error: article %d not found in block\n", aid); |
| 1056 |
|
return -2; |
| 1057 |
|
} |
| 1058 |
|
|
| 1059 |
|
if (p_section_src->sid != p_article->sid) |
| 1060 |
|
{ |
| 1061 |
|
log_error("section_list_move_topic() error: src section sid %d != article %d sid %d\n", |
| 1062 |
|
p_section_src->sid, p_article->aid, p_article->sid); |
| 1063 |
|
return -2; |
| 1064 |
|
} |
| 1065 |
|
|
| 1066 |
|
if (p_article->tid != 0) |
| 1067 |
|
{ |
| 1068 |
|
log_error("section_list_move_topic(aid = %d) error: article is not head of topic, tid = %d\n", aid, p_article->tid); |
| 1069 |
|
return -2; |
| 1070 |
|
} |
| 1071 |
|
|
| 1072 |
|
last_unaffected_aid_src = (p_article == p_section_src->p_article_head ? 0 : p_article->p_prior->aid); |
| 1073 |
|
|
| 1074 |
|
move_article_count = article_count_of_topic(aid); |
| 1075 |
|
if (move_article_count <= 0) |
| 1076 |
|
{ |
| 1077 |
|
log_error("section_list_count_of_topic_articles(aid = %d) <= 0\n", aid); |
| 1078 |
|
return -2; |
| 1079 |
|
} |
| 1080 |
|
|
| 1081 |
|
if (p_section_dest->article_count + move_article_count > BBS_article_limit_per_section) |
| 1082 |
|
{ |
| 1083 |
|
log_error("section_list_move_topic() error: article_count %d reach limit in section %d\n", |
| 1084 |
|
p_section_dest->article_count + move_article_count, p_section_dest->sid); |
| 1085 |
|
return -3; |
| 1086 |
|
} |
| 1087 |
|
|
| 1088 |
|
dest_article_count_old = p_section_dest->article_count; |
| 1089 |
|
move_counter = 0; |
| 1090 |
|
first_inserted_aid_dest = p_article->aid; |
| 1091 |
|
|
| 1092 |
|
do |
| 1093 |
|
{ |
| 1094 |
|
if (p_section_src->sid != p_article->sid) |
| 1095 |
|
{ |
| 1096 |
|
log_error("section_list_move_topic() error: src section sid %d != article %d sid %d\n", |
| 1097 |
|
p_section_src->sid, p_article->aid, p_article->sid); |
| 1098 |
|
return -2; |
| 1099 |
|
} |
| 1100 |
|
|
| 1101 |
|
// Remove from bi-directional article list of src section |
| 1102 |
|
if (p_section_src->p_article_head == p_article) |
| 1103 |
|
{ |
| 1104 |
|
p_section_src->p_article_head = p_article->p_next; |
| 1105 |
|
} |
| 1106 |
|
if (p_section_src->p_article_tail == p_article) |
| 1107 |
|
{ |
| 1108 |
|
p_section_src->p_article_tail = p_article->p_prior; |
| 1109 |
|
} |
| 1110 |
|
if (p_section_src->p_article_head == p_article) // || p_section_src->p_article_tail == p_article |
| 1111 |
|
{ |
| 1112 |
|
p_section_src->p_article_head = NULL; |
| 1113 |
|
p_section_src->p_article_tail = NULL; |
| 1114 |
|
} |
| 1115 |
|
|
| 1116 |
|
p_article->p_prior->p_next = p_article->p_next; |
| 1117 |
|
p_article->p_next->p_prior = p_article->p_prior; |
| 1118 |
|
|
| 1119 |
|
// Update sid of article |
| 1120 |
|
p_article->sid = p_section_dest->sid; |
| 1121 |
|
|
| 1122 |
|
if (section_list_find_article_with_offset(p_section_dest, p_article->aid, &page, &offset, &p_next) != NULL) |
| 1123 |
|
{ |
| 1124 |
|
log_error("section_list_move_topic() error: article %d already in section %d\n", p_article->aid, p_section_dest->sid); |
| 1125 |
|
return -4; |
| 1126 |
|
} |
| 1127 |
|
|
| 1128 |
|
// Insert into bi-directional article list of dest section |
| 1129 |
|
if (p_next == NULL) // empty section |
| 1130 |
|
{ |
| 1131 |
|
p_section_dest->p_article_head = p_article; |
| 1132 |
|
p_section_dest->p_article_tail = p_article; |
| 1133 |
|
p_article->p_prior = p_article; |
| 1134 |
|
p_article->p_next = p_article; |
| 1135 |
|
} |
| 1136 |
|
else |
| 1137 |
|
{ |
| 1138 |
|
if (p_section_dest->p_article_head == p_next) |
| 1139 |
|
{ |
| 1140 |
|
if (p_article->aid < p_next->aid) |
| 1141 |
|
{ |
| 1142 |
|
p_section_dest->p_article_head = p_article; |
| 1143 |
|
} |
| 1144 |
|
else // p_article->aid > p_next->aid |
| 1145 |
|
{ |
| 1146 |
|
p_section_dest->p_article_tail = p_article; |
| 1147 |
|
} |
| 1148 |
|
} |
| 1149 |
|
|
| 1150 |
|
p_article->p_prior = p_next->p_prior; |
| 1151 |
|
p_article->p_next = p_next; |
| 1152 |
|
p_next->p_prior->p_next = p_article; |
| 1153 |
|
p_next->p_prior = p_article; |
| 1154 |
|
} |
| 1155 |
|
|
| 1156 |
|
// Update article / topic counter of src / desc section |
| 1157 |
|
p_section_src->article_count--; |
| 1158 |
|
p_section_dest->article_count++; |
| 1159 |
|
if (p_article->tid == 0) |
| 1160 |
|
{ |
| 1161 |
|
p_section_src->topic_count--; |
| 1162 |
|
p_section_dest->topic_count++; |
| 1163 |
|
} |
| 1164 |
|
|
| 1165 |
|
// Update visible article / topic counter of src / desc section |
| 1166 |
|
if (p_article->visible) |
| 1167 |
|
{ |
| 1168 |
|
p_section_src->visible_article_count--; |
| 1169 |
|
p_section_dest->visible_article_count++; |
| 1170 |
|
if (p_article->tid == 0) |
| 1171 |
|
{ |
| 1172 |
|
p_section_src->visible_topic_count--; |
| 1173 |
|
p_section_dest->visible_topic_count++; |
| 1174 |
|
} |
| 1175 |
|
} |
| 1176 |
|
|
| 1177 |
|
// Update page for empty dest section |
| 1178 |
|
if (p_section_dest->article_count == 1) |
| 1179 |
|
{ |
| 1180 |
|
p_section_dest->p_page_first_article[0] = p_article; |
| 1181 |
|
p_section_dest->page_count = 1; |
| 1182 |
|
p_section_dest->last_page_visible_article_count = (p_article->visible ? 1 : 0); |
| 1183 |
|
} |
| 1184 |
|
|
| 1185 |
|
p_article = p_article->p_topic_next; |
| 1186 |
|
|
| 1187 |
|
move_counter++; |
| 1188 |
|
if (move_counter % CALCULATE_PAGE_THRESHOLD == 0) |
| 1189 |
|
{ |
| 1190 |
|
// Re-calculate pages of desc section |
| 1191 |
|
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0) |
| 1192 |
|
{ |
| 1193 |
|
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n", |
| 1194 |
|
p_section_dest->sid, first_inserted_aid_dest); |
| 1195 |
|
} |
| 1196 |
|
|
| 1197 |
|
first_inserted_aid_dest = p_article->aid; |
| 1198 |
|
} |
| 1199 |
|
} while (p_article->aid != aid); |
| 1200 |
|
|
| 1201 |
|
if (p_section_dest->article_count - dest_article_count_old != move_article_count) |
| 1202 |
|
{ |
| 1203 |
|
log_error("section_list_move_topic() error: count of moved articles %d != %d\n", |
| 1204 |
|
p_section_dest->article_count - dest_article_count_old, move_article_count); |
| 1205 |
|
} |
| 1206 |
|
|
| 1207 |
|
// Re-calculate pages of src section |
| 1208 |
|
if (section_list_calculate_page(p_section_src, last_unaffected_aid_src) < 0) |
| 1209 |
|
{ |
| 1210 |
|
log_error("section_list_calculate_page(src section = %d, aid = %d) error at aid = %d\n", |
| 1211 |
|
p_section_src->sid, last_unaffected_aid_src, aid); |
| 1212 |
|
} |
| 1213 |
|
|
| 1214 |
|
if (move_counter % CALCULATE_PAGE_THRESHOLD != 0) |
| 1215 |
|
{ |
| 1216 |
|
// Re-calculate pages of desc section |
| 1217 |
|
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0) |
| 1218 |
|
{ |
| 1219 |
|
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n", |
| 1220 |
|
p_section_dest->sid, first_inserted_aid_dest); |
| 1221 |
|
} |
| 1222 |
|
} |
| 1223 |
|
|
| 1224 |
|
return move_article_count; |
| 1225 |
|
} |
| 1226 |
|
|
| 1227 |
|
int get_section_index(SECTION_LIST *p_section) |
| 1228 |
|
{ |
| 1229 |
|
int index; |
| 1230 |
|
|
| 1231 |
|
if (p_section_list_pool == NULL) |
| 1232 |
|
{ |
| 1233 |
|
log_error("get_section_index() error: uninitialized\n"); |
| 1234 |
|
return -1; |
| 1235 |
|
} |
| 1236 |
|
|
| 1237 |
if (p_section == NULL) |
if (p_section == NULL) |
| 1238 |
{ |
{ |
| 1239 |
log_error("section_data_mark_del_article() NULL pointer error\n"); |
index = BBS_max_section; |
| 1240 |
|
} |
| 1241 |
|
else |
| 1242 |
|
{ |
| 1243 |
|
index = (int)(p_section - p_section_list_pool); |
| 1244 |
|
if (index < 0 || index >= BBS_max_section) |
| 1245 |
|
{ |
| 1246 |
|
log_error("get_section_index(%d) error: index out of range\n", index); |
| 1247 |
|
return -2; |
| 1248 |
|
} |
| 1249 |
|
} |
| 1250 |
|
|
| 1251 |
|
return index; |
| 1252 |
|
} |
| 1253 |
|
|
| 1254 |
|
int section_list_try_rd_lock(SECTION_LIST *p_section, int wait_sec) |
| 1255 |
|
{ |
| 1256 |
|
int index; |
| 1257 |
|
struct sembuf sops[4]; |
| 1258 |
|
struct timespec timeout; |
| 1259 |
|
int ret; |
| 1260 |
|
|
| 1261 |
|
index = get_section_index(p_section); |
| 1262 |
|
if (index < 0) |
| 1263 |
|
{ |
| 1264 |
return -2; |
return -2; |
| 1265 |
} |
} |
| 1266 |
|
|
| 1267 |
p_article = section_data_find_article_by_aid(p_section, aid); |
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1268 |
if (p_article == NULL) |
sops[0].sem_op = 0; // wait until unlocked |
| 1269 |
|
sops[0].sem_flg = 0; |
| 1270 |
|
|
| 1271 |
|
sops[1].sem_num = (unsigned short)(index * 2); // r_sem of section index |
| 1272 |
|
sops[1].sem_op = 1; // lock |
| 1273 |
|
sops[1].sem_flg = SEM_UNDO; // undo on terminate |
| 1274 |
|
|
| 1275 |
|
// Read lock on any specific section will also acquire single read lock on "all section" |
| 1276 |
|
// so that write lock on all section only need to acquire single write on on "all section" |
| 1277 |
|
// rather than to acquire multiple write locks on all the available sections. |
| 1278 |
|
if (index != BBS_max_section) |
| 1279 |
{ |
{ |
| 1280 |
return -1; // Not found |
sops[2].sem_num = BBS_max_section * 2 + 1; // w_sem of all section |
| 1281 |
|
sops[2].sem_op = 0; // wait until unlocked |
| 1282 |
|
sops[2].sem_flg = 0; |
| 1283 |
|
|
| 1284 |
|
sops[3].sem_num = BBS_max_section * 2; // r_sem of all section |
| 1285 |
|
sops[3].sem_op = 1; // lock |
| 1286 |
|
sops[3].sem_flg = SEM_UNDO; // undo on terminate |
| 1287 |
|
} |
| 1288 |
|
|
| 1289 |
|
timeout.tv_sec = wait_sec; |
| 1290 |
|
timeout.tv_nsec = 0; |
| 1291 |
|
|
| 1292 |
|
ret = semtimedop(section_list_pool_semid, sops, (index == BBS_max_section ? 2 : 4), &timeout); |
| 1293 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1294 |
|
{ |
| 1295 |
|
log_error("semtimedop(index = %d, lock read) error %d\n", index, errno); |
| 1296 |
|
} |
| 1297 |
|
|
| 1298 |
|
return ret; |
| 1299 |
|
} |
| 1300 |
|
|
| 1301 |
|
int section_list_try_rw_lock(SECTION_LIST *p_section, int wait_sec) |
| 1302 |
|
{ |
| 1303 |
|
int index; |
| 1304 |
|
struct sembuf sops[3]; |
| 1305 |
|
struct timespec timeout; |
| 1306 |
|
int ret; |
| 1307 |
|
|
| 1308 |
|
index = get_section_index(p_section); |
| 1309 |
|
if (index < 0) |
| 1310 |
|
{ |
| 1311 |
|
return -2; |
| 1312 |
} |
} |
| 1313 |
|
|
| 1314 |
if (p_article->visible == 0) |
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1315 |
|
sops[0].sem_op = 0; // wait until unlocked |
| 1316 |
|
sops[0].sem_flg = 0; |
| 1317 |
|
|
| 1318 |
|
sops[1].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1319 |
|
sops[1].sem_op = 1; // lock |
| 1320 |
|
sops[1].sem_flg = SEM_UNDO; // undo on terminate |
| 1321 |
|
|
| 1322 |
|
sops[2].sem_num = (unsigned short)(index * 2); // r_sem of section index |
| 1323 |
|
sops[2].sem_op = 0; // wait until unlocked |
| 1324 |
|
sops[2].sem_flg = 0; |
| 1325 |
|
|
| 1326 |
|
timeout.tv_sec = wait_sec; |
| 1327 |
|
timeout.tv_nsec = 0; |
| 1328 |
|
|
| 1329 |
|
ret = semtimedop(section_list_pool_semid, sops, 3, &timeout); |
| 1330 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1331 |
{ |
{ |
| 1332 |
return 0; // Already deleted |
log_error("semtimedop(index = %d, lock write) error %d\n", index, errno); |
| 1333 |
} |
} |
| 1334 |
|
|
| 1335 |
p_article->visible = 0; |
return ret; |
| 1336 |
p_section->delete_count++; |
} |
| 1337 |
|
|
| 1338 |
|
int section_list_rd_unlock(SECTION_LIST *p_section) |
| 1339 |
|
{ |
| 1340 |
|
int index; |
| 1341 |
|
struct sembuf sops[2]; |
| 1342 |
|
int ret; |
| 1343 |
|
|
| 1344 |
|
index = get_section_index(p_section); |
| 1345 |
|
if (index < 0) |
| 1346 |
|
{ |
| 1347 |
|
return -2; |
| 1348 |
|
} |
| 1349 |
|
|
| 1350 |
|
sops[0].sem_num = (unsigned short)(index * 2); // r_sem of section index |
| 1351 |
|
sops[0].sem_op = -1; // unlock |
| 1352 |
|
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1353 |
|
|
| 1354 |
|
if (index != BBS_max_section) |
| 1355 |
|
{ |
| 1356 |
|
sops[1].sem_num = BBS_max_section * 2; // r_sem of all section |
| 1357 |
|
sops[1].sem_op = -1; // unlock |
| 1358 |
|
sops[1].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1359 |
|
} |
| 1360 |
|
|
| 1361 |
|
ret = semop(section_list_pool_semid, sops, (index == BBS_max_section ? 1 : 2)); |
| 1362 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1363 |
|
{ |
| 1364 |
|
log_error("semop(index = %d, unlock read) error %d\n", index, errno); |
| 1365 |
|
} |
| 1366 |
|
|
| 1367 |
|
return ret; |
| 1368 |
|
} |
| 1369 |
|
|
| 1370 |
|
int section_list_rw_unlock(SECTION_LIST *p_section) |
| 1371 |
|
{ |
| 1372 |
|
int index; |
| 1373 |
|
struct sembuf sops[1]; |
| 1374 |
|
int ret; |
| 1375 |
|
|
| 1376 |
|
index = get_section_index(p_section); |
| 1377 |
|
if (index < 0) |
| 1378 |
|
{ |
| 1379 |
|
return -2; |
| 1380 |
|
} |
| 1381 |
|
|
| 1382 |
|
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index |
| 1383 |
|
sops[0].sem_op = -1; // unlock |
| 1384 |
|
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1385 |
|
|
| 1386 |
|
ret = semop(section_list_pool_semid, sops, 1); |
| 1387 |
|
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1388 |
|
{ |
| 1389 |
|
log_error("semop(index = %d, unlock write) error %d\n", index, errno); |
| 1390 |
|
} |
| 1391 |
|
|
| 1392 |
return 1; |
return ret; |
| 1393 |
} |
} |