| 1 |
/***************************************************************************
|
| 2 |
user_list.c - description
|
| 3 |
-------------------
|
| 4 |
Copyright : (C) 2004-2025 by Leaflet
|
| 5 |
Email : leaflet@leafok.com
|
| 6 |
***************************************************************************/
|
| 7 |
|
| 8 |
/***************************************************************************
|
| 9 |
* *
|
| 10 |
* This program is free software; you can redistribute it and/or modify *
|
| 11 |
* it under the terms of the GNU General Public License as published by *
|
| 12 |
* the Free Software Foundation; either version 3 of the License, or *
|
| 13 |
* (at your option) any later version. *
|
| 14 |
* *
|
| 15 |
***************************************************************************/
|
| 16 |
|
| 17 |
#include "common.h"
|
| 18 |
#include "database.h"
|
| 19 |
#include "log.h"
|
| 20 |
#include "trie_dict.h"
|
| 21 |
#include "user_list.h"
|
| 22 |
#include <errno.h>
|
| 23 |
#include <stdlib.h>
|
| 24 |
#include <string.h>
|
| 25 |
#include <time.h>
|
| 26 |
#include <sys/ipc.h>
|
| 27 |
#include <sys/mman.h>
|
| 28 |
#include <sys/param.h>
|
| 29 |
#include <sys/sem.h>
|
| 30 |
#include <sys/shm.h>
|
| 31 |
|
| 32 |
#ifdef _SEM_SEMUN_UNDEFINED
|
| 33 |
union semun
|
| 34 |
{
|
| 35 |
int val; /* Value for SETVAL */
|
| 36 |
struct semid_ds *buf; /* Buffer for IPC_STAT, IPC_SET */
|
| 37 |
unsigned short *array; /* Array for GETALL, SETALL */
|
| 38 |
struct seminfo *__buf; /* Buffer for IPC_INFO
|
| 39 |
(Linux-specific) */
|
| 40 |
};
|
| 41 |
#endif // #ifdef _SEM_SEMUN_UNDEFINED
|
| 42 |
|
| 43 |
#define USER_LIST_TRY_LOCK_WAIT_TIME 1 // second
|
| 44 |
#define USER_LIST_TRY_LOCK_TIMES 10
|
| 45 |
|
| 46 |
struct user_list_pool_t
|
| 47 |
{
|
| 48 |
int shmid;
|
| 49 |
int semid;
|
| 50 |
USER_LIST user_list[2];
|
| 51 |
USER_LIST *p_current;
|
| 52 |
USER_LIST *p_new;
|
| 53 |
USER_ONLINE_LIST user_online_list[2];
|
| 54 |
USER_ONLINE_LIST *p_online_current;
|
| 55 |
USER_ONLINE_LIST *p_online_new;
|
| 56 |
};
|
| 57 |
typedef struct user_list_pool_t USER_LIST_POOL;
|
| 58 |
|
| 59 |
static USER_LIST_POOL *p_user_list_pool = NULL;
|
| 60 |
static TRIE_NODE *p_trie_action_dict = NULL;
|
| 61 |
|
| 62 |
typedef struct user_action_map_t
|
| 63 |
{
|
| 64 |
char name[BBS_current_action_max_len + 1];
|
| 65 |
char title[BBS_current_action_max_len + 1];
|
| 66 |
} USER_ACTION_MAP;
|
| 67 |
|
| 68 |
const USER_ACTION_MAP user_action_map[] =
|
| 69 |
{
|
| 70 |
{"ARTICLE_FAVOR", "浏览收藏"},
|
| 71 |
{"BBS_NET", "站点穿梭"},
|
| 72 |
{"CHICKEN", "电子小鸡"},
|
| 73 |
{"EDIT_ARTICLE", "修改文章"},
|
| 74 |
{"LOGIN", "进入大厅"},
|
| 75 |
{"MENU", "菜单选择"},
|
| 76 |
{"POST_ARTICLE", "撰写文章"},
|
| 77 |
{"REPLY_ARTICLE", "回复文章"},
|
| 78 |
{"USER_LIST", "查花名册"},
|
| 79 |
{"USER_ONLINE", "环顾四周"},
|
| 80 |
{"VIEW_ARTICLE", "阅读文章"},
|
| 81 |
{"VIEW_FILE", "查看文档"},
|
| 82 |
{"WWW", "Web浏览"}};
|
| 83 |
|
| 84 |
const int user_action_map_size = sizeof(user_action_map) / sizeof(USER_ACTION_MAP);
|
| 85 |
|
| 86 |
static int user_list_try_rd_lock(int semid, int wait_sec);
|
| 87 |
static int user_list_try_rw_lock(int semid, int wait_sec);
|
| 88 |
static int user_list_rd_unlock(int semid);
|
| 89 |
static int user_list_rw_unlock(int semid);
|
| 90 |
static int user_list_rd_lock(int semid);
|
| 91 |
static int user_list_rw_lock(int semid);
|
| 92 |
|
| 93 |
static int user_list_load(MYSQL *db, USER_LIST *p_list);
|
| 94 |
static int user_online_list_load(MYSQL *db, USER_ONLINE_LIST *p_list);
|
| 95 |
|
| 96 |
int user_list_load(MYSQL *db, USER_LIST *p_list)
|
| 97 |
{
|
| 98 |
MYSQL_RES *rs = NULL;
|
| 99 |
MYSQL_ROW row;
|
| 100 |
char sql[SQL_BUFFER_LEN];
|
| 101 |
int ret = 0;
|
| 102 |
int i;
|
| 103 |
|
| 104 |
if (db == NULL || p_list == NULL)
|
| 105 |
{
|
| 106 |
log_error("NULL pointer error\n");
|
| 107 |
return -1;
|
| 108 |
}
|
| 109 |
|
| 110 |
snprintf(sql, sizeof(sql),
|
| 111 |
"SELECT user_list.UID AS UID, username, nickname, gender, gender_pub, life, exp, "
|
| 112 |
"UNIX_TIMESTAMP(signup_dt), UNIX_TIMESTAMP(last_login_dt), UNIX_TIMESTAMP(birthday) "
|
| 113 |
"FROM user_list INNER JOIN user_pubinfo ON user_list.UID = user_pubinfo.UID "
|
| 114 |
"INNER JOIN user_reginfo ON user_list.UID = user_reginfo.UID "
|
| 115 |
"WHERE enable ORDER BY UID");
|
| 116 |
|
| 117 |
if (mysql_query(db, sql) != 0)
|
| 118 |
{
|
| 119 |
log_error("Query user info error: %s\n", mysql_error(db));
|
| 120 |
ret = -1;
|
| 121 |
goto cleanup;
|
| 122 |
}
|
| 123 |
|
| 124 |
if ((rs = mysql_use_result(db)) == NULL)
|
| 125 |
{
|
| 126 |
log_error("Get user info data failed\n");
|
| 127 |
ret = -1;
|
| 128 |
goto cleanup;
|
| 129 |
}
|
| 130 |
|
| 131 |
i = 0;
|
| 132 |
while ((row = mysql_fetch_row(rs)))
|
| 133 |
{
|
| 134 |
p_list->users[i].uid = atoi(row[0]);
|
| 135 |
strncpy(p_list->users[i].username, row[1], sizeof(p_list->users[i].username) - 1);
|
| 136 |
p_list->users[i].username[sizeof(p_list->users[i].username) - 1] = '\0';
|
| 137 |
strncpy(p_list->users[i].nickname, row[2], sizeof(p_list->users[i].nickname) - 1);
|
| 138 |
p_list->users[i].nickname[sizeof(p_list->users[i].nickname) - 1] = '\0';
|
| 139 |
p_list->users[i].gender = row[3][0];
|
| 140 |
p_list->users[i].gender_pub = (int8_t)(row[4] == NULL ? 0 : atoi(row[4]));
|
| 141 |
p_list->users[i].life = (row[5] == NULL ? 0 : atoi(row[5]));
|
| 142 |
p_list->users[i].exp = (row[6] == NULL ? 0 : atoi(row[6]));
|
| 143 |
p_list->users[i].signup_dt = (row[7] == NULL ? 0 : atol(row[7]));
|
| 144 |
p_list->users[i].last_login_dt = (row[8] == NULL ? 0 : atol(row[8]));
|
| 145 |
p_list->users[i].birthday = (row[9] == NULL ? 0 : atol(row[9]));
|
| 146 |
|
| 147 |
i++;
|
| 148 |
if (i >= BBS_max_user_count)
|
| 149 |
{
|
| 150 |
log_error("Too many users, exceed limit %d\n", BBS_max_user_count);
|
| 151 |
break;
|
| 152 |
}
|
| 153 |
}
|
| 154 |
mysql_free_result(rs);
|
| 155 |
rs = NULL;
|
| 156 |
|
| 157 |
p_list->user_count = i;
|
| 158 |
|
| 159 |
#ifdef _DEBUG
|
| 160 |
log_error("Loaded %d users\n", p_list->user_count);
|
| 161 |
#endif
|
| 162 |
|
| 163 |
cleanup:
|
| 164 |
mysql_free_result(rs);
|
| 165 |
|
| 166 |
return ret;
|
| 167 |
}
|
| 168 |
|
| 169 |
int user_online_list_load(MYSQL *db, USER_ONLINE_LIST *p_list)
|
| 170 |
{
|
| 171 |
MYSQL_RES *rs = NULL;
|
| 172 |
MYSQL_ROW row;
|
| 173 |
char sql[SQL_BUFFER_LEN];
|
| 174 |
int ret = 0;
|
| 175 |
int i;
|
| 176 |
|
| 177 |
if (db == NULL || p_list == NULL)
|
| 178 |
{
|
| 179 |
log_error("NULL pointer error\n");
|
| 180 |
return -1;
|
| 181 |
}
|
| 182 |
|
| 183 |
snprintf(sql, sizeof(sql),
|
| 184 |
"SELECT SID, UID, ip, current_action, UNIX_TIMESTAMP(login_tm), "
|
| 185 |
"UNIX_TIMESTAMP(last_tm) FROM user_online "
|
| 186 |
"WHERE last_tm >= SUBDATE(NOW(), INTERVAL %d SECOND) "
|
| 187 |
"ORDER BY last_tm DESC",
|
| 188 |
BBS_user_off_line);
|
| 189 |
|
| 190 |
if (mysql_query(db, sql) != 0)
|
| 191 |
{
|
| 192 |
log_error("Query user online error: %s\n", mysql_error(db));
|
| 193 |
ret = -1;
|
| 194 |
goto cleanup;
|
| 195 |
}
|
| 196 |
|
| 197 |
if ((rs = mysql_use_result(db)) == NULL)
|
| 198 |
{
|
| 199 |
log_error("Get user online data failed\n");
|
| 200 |
ret = -1;
|
| 201 |
goto cleanup;
|
| 202 |
}
|
| 203 |
|
| 204 |
i = 0;
|
| 205 |
while ((row = mysql_fetch_row(rs)))
|
| 206 |
{
|
| 207 |
strncpy(p_list->users[i].session_id, row[0], sizeof(p_list->users[i].session_id) - 1);
|
| 208 |
|
| 209 |
p_list->users[i].session_id[sizeof(p_list->users[i].session_id) - 1] = '\0';
|
| 210 |
if ((ret = query_user_info(atoi(row[1]), &(p_list->users[i].user_info))) < 0)
|
| 211 |
{
|
| 212 |
log_error("query_user_info(%d) error\n", atoi(row[1]));
|
| 213 |
continue;
|
| 214 |
}
|
| 215 |
else if (ret == 0) // Guest
|
| 216 |
{
|
| 217 |
p_list->users[i].user_info.uid = 0;
|
| 218 |
strncpy(p_list->users[i].user_info.username, "guest", sizeof(p_list->users[i].user_info.username) - 1);
|
| 219 |
p_list->users[i].user_info.username[sizeof(p_list->users[i].user_info.username) - 1] = '\0';
|
| 220 |
strncpy(p_list->users[i].user_info.nickname, "Guest", sizeof(p_list->users[i].user_info.nickname) - 1);
|
| 221 |
p_list->users[i].user_info.nickname[sizeof(p_list->users[i].user_info.nickname) - 1] = '\0';
|
| 222 |
p_list->users[i].user_info.gender = 'M';
|
| 223 |
p_list->users[i].user_info.gender_pub = 0;
|
| 224 |
p_list->users[i].user_info.life = 150;
|
| 225 |
p_list->users[i].user_info.exp = 0;
|
| 226 |
p_list->users[i].user_info.signup_dt = 0;
|
| 227 |
p_list->users[i].user_info.last_login_dt = 0;
|
| 228 |
p_list->users[i].user_info.birthday = 0;
|
| 229 |
}
|
| 230 |
|
| 231 |
strncpy(p_list->users[i].ip, row[2], sizeof(p_list->users[i].ip) - 1);
|
| 232 |
p_list->users[i].ip[sizeof(p_list->users[i].ip) - 1] = '\0';
|
| 233 |
|
| 234 |
strncpy(p_list->users[i].current_action, row[3], sizeof(p_list->users[i].current_action) - 1);
|
| 235 |
p_list->users[i].current_action[sizeof(p_list->users[i].current_action) - 1] = '\0';
|
| 236 |
p_list->users[i].current_action_title = NULL;
|
| 237 |
if (p_list->users[i].current_action[0] == '\0')
|
| 238 |
{
|
| 239 |
p_list->users[i].current_action_title = "";
|
| 240 |
}
|
| 241 |
else if (trie_dict_get(p_trie_action_dict, p_list->users[i].current_action, (int64_t *)(&(p_list->users[i].current_action_title))) < 0)
|
| 242 |
{
|
| 243 |
log_error("trie_dict_get(p_trie_action_dict, %s) error on session_id=%s\n",
|
| 244 |
p_list->users[i].current_action, p_list->users[i].session_id);
|
| 245 |
continue;
|
| 246 |
}
|
| 247 |
|
| 248 |
p_list->users[i].login_tm = (row[4] == NULL ? 0 : atol(row[4]));
|
| 249 |
p_list->users[i].last_tm = (row[5] == NULL ? 0 : atol(row[5]));
|
| 250 |
|
| 251 |
i++;
|
| 252 |
if (i >= BBS_max_user_online_count)
|
| 253 |
{
|
| 254 |
log_error("Too many online users, exceed limit %d\n", BBS_max_user_online_count);
|
| 255 |
break;
|
| 256 |
}
|
| 257 |
}
|
| 258 |
mysql_free_result(rs);
|
| 259 |
rs = NULL;
|
| 260 |
|
| 261 |
p_list->user_count = i;
|
| 262 |
|
| 263 |
#ifdef _DEBUG
|
| 264 |
log_error("Loaded %d users\n", p_list->user_count);
|
| 265 |
#endif
|
| 266 |
|
| 267 |
cleanup:
|
| 268 |
mysql_free_result(rs);
|
| 269 |
|
| 270 |
return ret;
|
| 271 |
}
|
| 272 |
|
| 273 |
int user_list_pool_init(void)
|
| 274 |
{
|
| 275 |
int shmid;
|
| 276 |
int semid;
|
| 277 |
int proj_id;
|
| 278 |
key_t key;
|
| 279 |
size_t size;
|
| 280 |
void *p_shm;
|
| 281 |
union semun arg;
|
| 282 |
int i;
|
| 283 |
|
| 284 |
if (p_user_list_pool != NULL || p_trie_action_dict != NULL)
|
| 285 |
{
|
| 286 |
log_error("p_user_list_pool already initialized\n");
|
| 287 |
return -1;
|
| 288 |
}
|
| 289 |
|
| 290 |
p_trie_action_dict = trie_dict_create();
|
| 291 |
if (p_trie_action_dict == NULL)
|
| 292 |
{
|
| 293 |
log_error("trie_dict_create() error\n");
|
| 294 |
return -1;
|
| 295 |
}
|
| 296 |
|
| 297 |
for (i = 0; i < user_action_map_size; i++)
|
| 298 |
{
|
| 299 |
if (trie_dict_set(p_trie_action_dict, user_action_map[i].name, (int64_t)(user_action_map[i].title)) < 0)
|
| 300 |
{
|
| 301 |
log_error("trie_dict_set(p_trie_action_dict, %s) error\n", user_action_map[i].name);
|
| 302 |
}
|
| 303 |
}
|
| 304 |
|
| 305 |
// Allocate shared memory
|
| 306 |
proj_id = (int)(time(NULL) % getpid());
|
| 307 |
key = ftok(VAR_USER_LIST_SHM, proj_id);
|
| 308 |
if (key == -1)
|
| 309 |
{
|
| 310 |
log_error("ftok(%s %d) error (%d)\n", VAR_USER_LIST_SHM, proj_id, errno);
|
| 311 |
return -2;
|
| 312 |
}
|
| 313 |
|
| 314 |
size = sizeof(USER_LIST_POOL);
|
| 315 |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600);
|
| 316 |
if (shmid == -1)
|
| 317 |
{
|
| 318 |
log_error("shmget(size = %d) error (%d)\n", size, errno);
|
| 319 |
return -3;
|
| 320 |
}
|
| 321 |
p_shm = shmat(shmid, NULL, 0);
|
| 322 |
if (p_shm == (void *)-1)
|
| 323 |
{
|
| 324 |
log_error("shmat(shmid=%d) error (%d)\n", shmid, errno);
|
| 325 |
return -3;
|
| 326 |
}
|
| 327 |
|
| 328 |
p_user_list_pool = p_shm;
|
| 329 |
p_user_list_pool->shmid = shmid;
|
| 330 |
|
| 331 |
// Allocate semaphore as user list pool lock
|
| 332 |
size = 2; // r_sem and w_sem
|
| 333 |
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600);
|
| 334 |
if (semid == -1)
|
| 335 |
{
|
| 336 |
log_error("semget(user_list_pool_sem, size = %d) error (%d)\n", size, errno);
|
| 337 |
return -3;
|
| 338 |
}
|
| 339 |
|
| 340 |
// Initialize sem value to 0
|
| 341 |
arg.val = 0;
|
| 342 |
for (i = 0; i < size; i++)
|
| 343 |
{
|
| 344 |
if (semctl(semid, i, SETVAL, arg) == -1)
|
| 345 |
{
|
| 346 |
log_error("semctl(user_list_pool_sem, SETVAL) error (%d)\n", errno);
|
| 347 |
return -3;
|
| 348 |
}
|
| 349 |
}
|
| 350 |
|
| 351 |
p_user_list_pool->semid = semid;
|
| 352 |
|
| 353 |
// Set user counts to 0
|
| 354 |
p_user_list_pool->user_list[0].user_count = 0;
|
| 355 |
p_user_list_pool->user_list[1].user_count = 0;
|
| 356 |
|
| 357 |
p_user_list_pool->p_current = &(p_user_list_pool->user_list[0]);
|
| 358 |
p_user_list_pool->p_new = &(p_user_list_pool->user_list[1]);
|
| 359 |
|
| 360 |
p_user_list_pool->p_online_current = &(p_user_list_pool->user_online_list[0]);
|
| 361 |
p_user_list_pool->p_online_new = &(p_user_list_pool->user_online_list[1]);
|
| 362 |
|
| 363 |
return 0;
|
| 364 |
}
|
| 365 |
|
| 366 |
void user_list_pool_cleanup(void)
|
| 367 |
{
|
| 368 |
int shmid;
|
| 369 |
|
| 370 |
if (p_user_list_pool == NULL)
|
| 371 |
{
|
| 372 |
return;
|
| 373 |
}
|
| 374 |
|
| 375 |
shmid = p_user_list_pool->shmid;
|
| 376 |
|
| 377 |
if (semctl(p_user_list_pool->semid, 0, IPC_RMID) == -1)
|
| 378 |
{
|
| 379 |
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", p_user_list_pool->semid, errno);
|
| 380 |
}
|
| 381 |
|
| 382 |
if (shmdt(p_user_list_pool) == -1)
|
| 383 |
{
|
| 384 |
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno);
|
| 385 |
}
|
| 386 |
|
| 387 |
if (shmctl(shmid, IPC_RMID, NULL) == -1)
|
| 388 |
{
|
| 389 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", shmid, errno);
|
| 390 |
}
|
| 391 |
|
| 392 |
p_user_list_pool = NULL;
|
| 393 |
|
| 394 |
if (p_trie_action_dict != NULL)
|
| 395 |
{
|
| 396 |
trie_dict_destroy(p_trie_action_dict);
|
| 397 |
|
| 398 |
p_trie_action_dict = NULL;
|
| 399 |
}
|
| 400 |
}
|
| 401 |
|
| 402 |
int set_user_list_pool_shm_readonly(void)
|
| 403 |
{
|
| 404 |
int shmid;
|
| 405 |
void *p_shm;
|
| 406 |
|
| 407 |
if (p_user_list_pool == NULL)
|
| 408 |
{
|
| 409 |
log_error("p_user_list_pool not initialized\n");
|
| 410 |
return -1;
|
| 411 |
}
|
| 412 |
|
| 413 |
shmid = p_user_list_pool->shmid;
|
| 414 |
|
| 415 |
// Remap shared memory in read-only mode
|
| 416 |
p_shm = shmat(shmid, p_user_list_pool, SHM_RDONLY | SHM_REMAP);
|
| 417 |
if (p_shm == (void *)-1)
|
| 418 |
{
|
| 419 |
log_error("shmat(user_list_pool shmid = %d) error (%d)\n", shmid, errno);
|
| 420 |
return -3;
|
| 421 |
}
|
| 422 |
|
| 423 |
p_user_list_pool = p_shm;
|
| 424 |
|
| 425 |
return 0;
|
| 426 |
}
|
| 427 |
|
| 428 |
int detach_user_list_pool_shm(void)
|
| 429 |
{
|
| 430 |
if (p_user_list_pool != NULL && shmdt(p_user_list_pool) == -1)
|
| 431 |
{
|
| 432 |
log_error("shmdt(user_list_pool) error (%d)\n", errno);
|
| 433 |
return -1;
|
| 434 |
}
|
| 435 |
|
| 436 |
p_user_list_pool = NULL;
|
| 437 |
|
| 438 |
return 0;
|
| 439 |
}
|
| 440 |
|
| 441 |
int user_list_pool_reload(int online_user)
|
| 442 |
{
|
| 443 |
MYSQL *db = NULL;
|
| 444 |
USER_LIST *p_tmp;
|
| 445 |
USER_ONLINE_LIST *p_online_tmp;
|
| 446 |
|
| 447 |
if (p_user_list_pool == NULL)
|
| 448 |
{
|
| 449 |
log_error("p_user_list_pool not initialized\n");
|
| 450 |
return -1;
|
| 451 |
}
|
| 452 |
|
| 453 |
db = db_open();
|
| 454 |
if (db == NULL)
|
| 455 |
{
|
| 456 |
log_error("db_open() error: %s\n", mysql_error(db));
|
| 457 |
return -1;
|
| 458 |
}
|
| 459 |
|
| 460 |
if (online_user)
|
| 461 |
{
|
| 462 |
if (user_online_list_load(db, p_user_list_pool->p_online_new) < 0)
|
| 463 |
{
|
| 464 |
log_error("user_online_list_load() error\n");
|
| 465 |
return -2;
|
| 466 |
}
|
| 467 |
}
|
| 468 |
else
|
| 469 |
{
|
| 470 |
if (user_list_load(db, p_user_list_pool->p_new) < 0)
|
| 471 |
{
|
| 472 |
log_error("user_list_load() error\n");
|
| 473 |
return -2;
|
| 474 |
}
|
| 475 |
}
|
| 476 |
|
| 477 |
mysql_close(db);
|
| 478 |
|
| 479 |
if (user_list_rw_lock(p_user_list_pool->semid) < 0)
|
| 480 |
{
|
| 481 |
log_error("user_list_rw_lock() error\n");
|
| 482 |
return -3;
|
| 483 |
}
|
| 484 |
|
| 485 |
if (online_user)
|
| 486 |
{
|
| 487 |
// Swap p_online_current and p_online_new
|
| 488 |
p_online_tmp = p_user_list_pool->p_online_current;
|
| 489 |
p_user_list_pool->p_online_current = p_user_list_pool->p_online_new;
|
| 490 |
p_user_list_pool->p_online_new = p_online_tmp;
|
| 491 |
}
|
| 492 |
else
|
| 493 |
{
|
| 494 |
// Swap p_current and p_new
|
| 495 |
p_tmp = p_user_list_pool->p_current;
|
| 496 |
p_user_list_pool->p_current = p_user_list_pool->p_new;
|
| 497 |
p_user_list_pool->p_new = p_tmp;
|
| 498 |
}
|
| 499 |
|
| 500 |
if (user_list_rw_unlock(p_user_list_pool->semid) < 0)
|
| 501 |
{
|
| 502 |
log_error("user_list_rw_unlock() error\n");
|
| 503 |
return -3;
|
| 504 |
}
|
| 505 |
|
| 506 |
return 0;
|
| 507 |
}
|
| 508 |
|
| 509 |
int user_list_try_rd_lock(int semid, int wait_sec)
|
| 510 |
{
|
| 511 |
struct sembuf sops[2];
|
| 512 |
struct timespec timeout;
|
| 513 |
int ret;
|
| 514 |
|
| 515 |
sops[0].sem_num = 1; // w_sem
|
| 516 |
sops[0].sem_op = 0; // wait until unlocked
|
| 517 |
sops[0].sem_flg = 0;
|
| 518 |
|
| 519 |
sops[1].sem_num = 0; // r_sem
|
| 520 |
sops[1].sem_op = 1; // lock
|
| 521 |
sops[1].sem_flg = SEM_UNDO; // undo on terminate
|
| 522 |
|
| 523 |
timeout.tv_sec = wait_sec;
|
| 524 |
timeout.tv_nsec = 0;
|
| 525 |
|
| 526 |
ret = semtimedop(semid, sops, 2, &timeout);
|
| 527 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 528 |
{
|
| 529 |
log_error("semtimedop(lock read) error %d\n", errno);
|
| 530 |
}
|
| 531 |
|
| 532 |
return ret;
|
| 533 |
}
|
| 534 |
|
| 535 |
int user_list_try_rw_lock(int semid, int wait_sec)
|
| 536 |
{
|
| 537 |
struct sembuf sops[3];
|
| 538 |
struct timespec timeout;
|
| 539 |
int ret;
|
| 540 |
|
| 541 |
sops[0].sem_num = 1; // w_sem
|
| 542 |
sops[0].sem_op = 0; // wait until unlocked
|
| 543 |
sops[0].sem_flg = 0;
|
| 544 |
|
| 545 |
sops[1].sem_num = 1; // w_sem
|
| 546 |
sops[1].sem_op = 1; // lock
|
| 547 |
sops[1].sem_flg = SEM_UNDO; // undo on terminate
|
| 548 |
|
| 549 |
sops[2].sem_num = 0; // r_sem
|
| 550 |
sops[2].sem_op = 0; // wait until unlocked
|
| 551 |
sops[2].sem_flg = 0;
|
| 552 |
|
| 553 |
timeout.tv_sec = wait_sec;
|
| 554 |
timeout.tv_nsec = 0;
|
| 555 |
|
| 556 |
ret = semtimedop(semid, sops, 3, &timeout);
|
| 557 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 558 |
{
|
| 559 |
log_error("semtimedop(lock write) error %d\n", errno);
|
| 560 |
}
|
| 561 |
|
| 562 |
return ret;
|
| 563 |
}
|
| 564 |
|
| 565 |
int user_list_rd_unlock(int semid)
|
| 566 |
{
|
| 567 |
struct sembuf sops[2];
|
| 568 |
int ret;
|
| 569 |
|
| 570 |
sops[0].sem_num = 0; // r_sem
|
| 571 |
sops[0].sem_op = -1; // unlock
|
| 572 |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait
|
| 573 |
|
| 574 |
ret = semop(semid, sops, 1);
|
| 575 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 576 |
{
|
| 577 |
log_error("semop(unlock read) error %d\n", errno);
|
| 578 |
}
|
| 579 |
|
| 580 |
return ret;
|
| 581 |
}
|
| 582 |
|
| 583 |
int user_list_rw_unlock(int semid)
|
| 584 |
{
|
| 585 |
struct sembuf sops[1];
|
| 586 |
int ret;
|
| 587 |
|
| 588 |
sops[0].sem_num = 1; // w_sem
|
| 589 |
sops[0].sem_op = -1; // unlock
|
| 590 |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait
|
| 591 |
|
| 592 |
ret = semop(semid, sops, 1);
|
| 593 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 594 |
{
|
| 595 |
log_error("semop(unlock write) error %d\n", errno);
|
| 596 |
}
|
| 597 |
|
| 598 |
return ret;
|
| 599 |
}
|
| 600 |
|
| 601 |
int user_list_rd_lock(int semid)
|
| 602 |
{
|
| 603 |
int timer = 0;
|
| 604 |
int ret = -1;
|
| 605 |
|
| 606 |
while (!SYS_server_exit)
|
| 607 |
{
|
| 608 |
ret = user_list_try_rd_lock(semid, USER_LIST_TRY_LOCK_WAIT_TIME);
|
| 609 |
if (ret == 0) // success
|
| 610 |
{
|
| 611 |
break;
|
| 612 |
}
|
| 613 |
else if (errno == EAGAIN || errno == EINTR) // retry
|
| 614 |
{
|
| 615 |
timer++;
|
| 616 |
if (timer % USER_LIST_TRY_LOCK_TIMES == 0)
|
| 617 |
{
|
| 618 |
log_error("user_list_try_rd_lock() tried %d times\n", timer);
|
| 619 |
}
|
| 620 |
}
|
| 621 |
else // failed
|
| 622 |
{
|
| 623 |
log_error("user_list_try_rd_lock() failed\n");
|
| 624 |
break;
|
| 625 |
}
|
| 626 |
}
|
| 627 |
|
| 628 |
return ret;
|
| 629 |
}
|
| 630 |
|
| 631 |
int user_list_rw_lock(int semid)
|
| 632 |
{
|
| 633 |
int timer = 0;
|
| 634 |
int ret = -1;
|
| 635 |
|
| 636 |
while (!SYS_server_exit)
|
| 637 |
{
|
| 638 |
ret = user_list_try_rw_lock(semid, USER_LIST_TRY_LOCK_WAIT_TIME);
|
| 639 |
if (ret == 0) // success
|
| 640 |
{
|
| 641 |
break;
|
| 642 |
}
|
| 643 |
else if (errno == EAGAIN || errno == EINTR) // retry
|
| 644 |
{
|
| 645 |
timer++;
|
| 646 |
if (timer % USER_LIST_TRY_LOCK_TIMES == 0)
|
| 647 |
{
|
| 648 |
log_error("user_list_try_rw_lock() tried %d times\n", timer);
|
| 649 |
}
|
| 650 |
}
|
| 651 |
else // failed
|
| 652 |
{
|
| 653 |
log_error("user_list_try_rw_lock() failed\n");
|
| 654 |
break;
|
| 655 |
}
|
| 656 |
}
|
| 657 |
|
| 658 |
return ret;
|
| 659 |
}
|
| 660 |
|
| 661 |
int query_user_list(int page_id, USER_INFO *p_users, int *p_user_count, int *p_page_count)
|
| 662 |
{
|
| 663 |
int ret = 0;
|
| 664 |
|
| 665 |
if (p_users == NULL || p_user_count == NULL || p_page_count == NULL)
|
| 666 |
{
|
| 667 |
log_error("NULL pointer error\n");
|
| 668 |
return -1;
|
| 669 |
}
|
| 670 |
|
| 671 |
// acquire lock of user list
|
| 672 |
if (user_list_rd_lock(p_user_list_pool->semid) < 0)
|
| 673 |
{
|
| 674 |
log_error("user_list_rd_lock() error\n");
|
| 675 |
return -2;
|
| 676 |
}
|
| 677 |
|
| 678 |
if (p_user_list_pool->p_current->user_count == 0)
|
| 679 |
{
|
| 680 |
// empty list
|
| 681 |
ret = 0;
|
| 682 |
goto cleanup;
|
| 683 |
}
|
| 684 |
|
| 685 |
*p_page_count = p_user_list_pool->p_current->user_count / BBS_user_limit_per_page +
|
| 686 |
(p_user_list_pool->p_current->user_count % BBS_user_limit_per_page == 0 ? 0 : 1);
|
| 687 |
|
| 688 |
if (page_id < 0 || page_id >= *p_page_count)
|
| 689 |
{
|
| 690 |
log_error("Invalid page_id = %d, not in range [0, %d)\n", page_id, *p_page_count);
|
| 691 |
ret = -3;
|
| 692 |
goto cleanup;
|
| 693 |
}
|
| 694 |
|
| 695 |
*p_user_count = MIN(BBS_user_limit_per_page,
|
| 696 |
p_user_list_pool->p_current->user_count -
|
| 697 |
page_id * BBS_user_limit_per_page);
|
| 698 |
|
| 699 |
memcpy(p_users,
|
| 700 |
p_user_list_pool->p_current->users + page_id * BBS_user_limit_per_page,
|
| 701 |
sizeof(USER_INFO) * (size_t)(*p_user_count));
|
| 702 |
|
| 703 |
cleanup:
|
| 704 |
// release lock of user list
|
| 705 |
if (user_list_rd_unlock(p_user_list_pool->semid) < 0)
|
| 706 |
{
|
| 707 |
log_error("user_list_rd_unlock() error\n");
|
| 708 |
ret = -1;
|
| 709 |
}
|
| 710 |
|
| 711 |
return ret;
|
| 712 |
}
|
| 713 |
|
| 714 |
int query_user_online_list(int page_id, USER_ONLINE_INFO *p_online_users, int *p_user_count, int *p_page_count)
|
| 715 |
{
|
| 716 |
int ret = 0;
|
| 717 |
|
| 718 |
if (p_online_users == NULL || p_user_count == NULL || p_page_count == NULL)
|
| 719 |
{
|
| 720 |
log_error("NULL pointer error\n");
|
| 721 |
return -1;
|
| 722 |
}
|
| 723 |
|
| 724 |
// acquire lock of user list
|
| 725 |
if (user_list_rd_lock(p_user_list_pool->semid) < 0)
|
| 726 |
{
|
| 727 |
log_error("user_list_rd_lock() error\n");
|
| 728 |
return -2;
|
| 729 |
}
|
| 730 |
|
| 731 |
if (p_user_list_pool->p_online_current->user_count == 0)
|
| 732 |
{
|
| 733 |
// empty list
|
| 734 |
ret = 0;
|
| 735 |
goto cleanup;
|
| 736 |
}
|
| 737 |
|
| 738 |
*p_page_count = p_user_list_pool->p_online_current->user_count / BBS_user_limit_per_page +
|
| 739 |
(p_user_list_pool->p_online_current->user_count % BBS_user_limit_per_page == 0 ? 0 : 1);
|
| 740 |
|
| 741 |
if (page_id < 0 || page_id >= *p_page_count)
|
| 742 |
{
|
| 743 |
log_error("Invalid page_id = %d, not in range [0, %d)\n", page_id, *p_page_count);
|
| 744 |
ret = -3;
|
| 745 |
goto cleanup;
|
| 746 |
}
|
| 747 |
|
| 748 |
*p_user_count = MIN(BBS_user_limit_per_page,
|
| 749 |
p_user_list_pool->p_online_current->user_count -
|
| 750 |
page_id * BBS_user_limit_per_page);
|
| 751 |
|
| 752 |
memcpy(p_online_users,
|
| 753 |
p_user_list_pool->p_online_current->users + page_id * BBS_user_limit_per_page,
|
| 754 |
sizeof(USER_ONLINE_INFO) * (size_t)(*p_user_count));
|
| 755 |
|
| 756 |
cleanup:
|
| 757 |
// release lock of user list
|
| 758 |
if (user_list_rd_unlock(p_user_list_pool->semid) < 0)
|
| 759 |
{
|
| 760 |
log_error("user_list_rd_unlock() error\n");
|
| 761 |
ret = -1;
|
| 762 |
}
|
| 763 |
|
| 764 |
return ret;
|
| 765 |
}
|
| 766 |
|
| 767 |
int query_user_info(int32_t uid, USER_INFO *p_user)
|
| 768 |
{
|
| 769 |
int left;
|
| 770 |
int right;
|
| 771 |
int mid;
|
| 772 |
int ret = 0;
|
| 773 |
|
| 774 |
if (p_user == NULL)
|
| 775 |
{
|
| 776 |
log_error("NULL pointer error\n");
|
| 777 |
return -1;
|
| 778 |
}
|
| 779 |
|
| 780 |
// acquire lock of user list
|
| 781 |
if (user_list_rd_lock(p_user_list_pool->semid) < 0)
|
| 782 |
{
|
| 783 |
log_error("user_list_rd_lock() error\n");
|
| 784 |
return -2;
|
| 785 |
}
|
| 786 |
|
| 787 |
left = 0;
|
| 788 |
right = p_user_list_pool->p_current->user_count - 1;
|
| 789 |
|
| 790 |
while (left < right)
|
| 791 |
{
|
| 792 |
mid = (left + right) / 2;
|
| 793 |
if (uid < p_user_list_pool->p_current->users[mid].uid)
|
| 794 |
{
|
| 795 |
right = mid;
|
| 796 |
}
|
| 797 |
else if (uid > p_user_list_pool->p_current->users[mid].uid)
|
| 798 |
{
|
| 799 |
left = mid + 1;
|
| 800 |
}
|
| 801 |
else // if (uid == p_user_list_pool->p_current->users[mid].uid)
|
| 802 |
{
|
| 803 |
left = mid;
|
| 804 |
break;
|
| 805 |
}
|
| 806 |
}
|
| 807 |
|
| 808 |
if (uid == p_user_list_pool->p_current->users[left].uid) // Found
|
| 809 |
{
|
| 810 |
*p_user = p_user_list_pool->p_current->users[left];
|
| 811 |
ret = 1;
|
| 812 |
}
|
| 813 |
|
| 814 |
// release lock of user list
|
| 815 |
if (user_list_rd_unlock(p_user_list_pool->semid) < 0)
|
| 816 |
{
|
| 817 |
log_error("user_list_rd_unlock() error\n");
|
| 818 |
ret = -1;
|
| 819 |
}
|
| 820 |
|
| 821 |
return ret;
|
| 822 |
}
|
Parent Directory
| 
Revision Log