| 23 |
#include <unistd.h> |
#include <unistd.h> |
| 24 |
#include <stdlib.h> |
#include <stdlib.h> |
| 25 |
#include <errno.h> |
#include <errno.h> |
| 26 |
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#include <sys/param.h> |
| 27 |
#include <sys/shm.h> |
#include <sys/shm.h> |
| 28 |
#include <sys/ipc.h> |
#include <sys/ipc.h> |
| 29 |
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|
| 30 |
// ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT should be |
#define ARTICLE_BLOCK_PER_SHM 400 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
|
// no less than BBS_article_block_limit_per_section * BBS_max_section, |
|
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// in order to allocate enough memory for blocks |
|
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#define ARTICLE_BLOCK_PER_SHM 400 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
|
| 31 |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 256 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 256 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
| 32 |
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#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
| 33 |
|
|
| 34 |
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struct article_block_t |
| 35 |
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{ |
| 36 |
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ARTICLE articles[ARTICLE_PER_BLOCK]; |
| 37 |
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int32_t article_count; |
| 38 |
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struct article_block_t *p_next_block; |
| 39 |
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}; |
| 40 |
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typedef struct article_block_t ARTICLE_BLOCK; |
| 41 |
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|
| 42 |
struct article_block_shm_t |
struct article_block_shm_t |
| 43 |
{ |
{ |
| 46 |
}; |
}; |
| 47 |
typedef struct article_block_shm_t ARTICLE_BLOCK_SHM; |
typedef struct article_block_shm_t ARTICLE_BLOCK_SHM; |
| 48 |
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|
| 49 |
static ARTICLE_BLOCK_SHM *p_article_block_shm_pool; |
struct article_block_pool_t |
| 50 |
static int article_block_shm_count; |
{ |
| 51 |
static ARTICLE_BLOCK *p_article_block_free_list; |
ARTICLE_BLOCK_SHM shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
| 52 |
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int shm_count; |
| 53 |
static SECTION_DATA *p_section_data_pool; |
ARTICLE_BLOCK *p_block_free_list; |
| 54 |
static int section_data_count; |
ARTICLE_BLOCK *p_block[ARTICLE_BLOCK_PER_POOL]; |
| 55 |
static TRIE_NODE *p_trie_dict_section_data; |
int32_t block_count; |
| 56 |
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}; |
| 57 |
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typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
| 58 |
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| 59 |
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static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
| 60 |
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|
| 61 |
int section_data_pool_init(const char *filename, int article_block_count) |
static SECTION_LIST *p_section_list_pool = NULL; |
| 62 |
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static int section_list_count = 0; |
| 63 |
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static TRIE_NODE *p_trie_dict_section_list = NULL; |
| 64 |
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|
| 65 |
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int article_block_init(const char *filename, int block_count) |
| 66 |
{ |
{ |
| 67 |
int shmid; |
int shmid; |
| 68 |
int proj_id; |
int proj_id; |
| 70 |
size_t size; |
size_t size; |
| 71 |
void *p_shm; |
void *p_shm; |
| 72 |
int i; |
int i; |
| 73 |
int article_block_count_in_shm; |
int block_count_in_shm; |
| 74 |
ARTICLE_BLOCK *p_article_block_in_shm; |
ARTICLE_BLOCK *p_block_in_shm; |
| 75 |
ARTICLE_BLOCK **pp_article_block_next; |
ARTICLE_BLOCK **pp_block_next; |
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|
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if (p_article_block_shm_pool != NULL || |
|
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p_article_block_free_list != NULL || |
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p_section_data_pool != NULL || |
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p_trie_dict_section_data != NULL) |
|
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{ |
|
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log_error("section_data_pool already initialized\n"); |
|
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return -1; |
|
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} |
|
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if (article_block_count > ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
|
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{ |
|
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log_error("article_block_count exceed limit %d\n", ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT); |
|
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return -2; |
|
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} |
|
| 76 |
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| 77 |
p_article_block_shm_pool = calloc((size_t)article_block_count / ARTICLE_BLOCK_PER_SHM + 1, sizeof(ARTICLE_BLOCK_SHM)); |
if (p_article_block_pool != NULL) |
|
if (p_article_block_shm_pool == NULL) |
|
| 78 |
{ |
{ |
| 79 |
log_error("calloc(%d ARTICLE_BLOCK_SHM) OOM\n", article_block_count / ARTICLE_BLOCK_PER_SHM + 1); |
log_error("article_block_pool already initialized\n"); |
| 80 |
return -2; |
return -1; |
| 81 |
} |
} |
| 82 |
|
|
| 83 |
p_section_data_pool = calloc(BBS_max_section, sizeof(SECTION_DATA)); |
if (block_count > ARTICLE_BLOCK_PER_POOL) |
|
if (p_section_data_pool == NULL) |
|
| 84 |
{ |
{ |
| 85 |
log_error("calloc(%d SECTION_DATA) OOM\n", BBS_max_section); |
log_error("article_block_count exceed limit %d\n", ARTICLE_BLOCK_PER_POOL); |
| 86 |
return -2; |
return -2; |
| 87 |
} |
} |
|
section_data_count = 0; |
|
| 88 |
|
|
| 89 |
p_trie_dict_section_data = trie_dict_create(); |
p_article_block_pool = calloc(1, sizeof(ARTICLE_BLOCK_POOL)); |
| 90 |
if (p_trie_dict_section_data == NULL) |
if (p_article_block_pool == NULL) |
| 91 |
{ |
{ |
| 92 |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
log_error("calloc(ARTICLE_BLOCK_POOL) OOM\n"); |
| 93 |
return -2; |
return -2; |
| 94 |
} |
} |
| 95 |
|
|
| 96 |
// Allocate shared memory |
// Allocate shared memory |
| 97 |
article_block_shm_count = 0; |
p_article_block_pool->shm_count = 0; |
| 98 |
pp_article_block_next = &p_article_block_free_list; |
pp_block_next = &(p_article_block_pool->p_block_free_list); |
| 99 |
|
|
| 100 |
while (article_block_count > 0) |
while (block_count > 0) |
| 101 |
{ |
{ |
| 102 |
article_block_count_in_shm = |
block_count_in_shm = MIN(block_count, ARTICLE_BLOCK_PER_SHM); |
| 103 |
(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; |
|
| 104 |
|
|
| 105 |
proj_id = getpid() + article_block_shm_count; |
proj_id = getpid() + p_article_block_pool->shm_count; |
| 106 |
key = ftok(filename, proj_id); |
key = ftok(filename, proj_id); |
| 107 |
if (key == -1) |
if (key == -1) |
| 108 |
{ |
{ |
| 109 |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno); |
| 110 |
section_data_pool_cleanup(); |
article_block_cleanup(); |
| 111 |
return -3; |
return -3; |
| 112 |
} |
} |
| 113 |
|
|
| 114 |
size = sizeof(shmid) + sizeof(ARTICLE_BLOCK) * (size_t)article_block_count_in_shm; |
size = sizeof(shmid) + sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm; |
| 115 |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
| 116 |
if (shmid == -1) |
if (shmid == -1) |
| 117 |
{ |
{ |
| 118 |
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); |
| 119 |
section_data_pool_cleanup(); |
article_block_cleanup(); |
| 120 |
return -3; |
return -3; |
| 121 |
} |
} |
| 122 |
p_shm = shmat(shmid, NULL, 0); |
p_shm = shmat(shmid, NULL, 0); |
| 123 |
if (p_shm == (void *)-1) |
if (p_shm == (void *)-1) |
| 124 |
{ |
{ |
| 125 |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
| 126 |
section_data_pool_cleanup(); |
article_block_cleanup(); |
| 127 |
return -3; |
return -3; |
| 128 |
} |
} |
| 129 |
|
|
| 130 |
(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; |
| 131 |
(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; |
| 132 |
article_block_shm_count++; |
p_article_block_pool->shm_count++; |
| 133 |
|
|
| 134 |
p_article_block_in_shm = p_shm; |
p_block_in_shm = p_shm; |
| 135 |
*pp_article_block_next = p_article_block_in_shm; |
*pp_block_next = p_block_in_shm; |
| 136 |
|
|
| 137 |
for (i = 0; i < article_block_count_in_shm; i++) |
for (i = 0; i < block_count_in_shm; i++) |
| 138 |
{ |
{ |
| 139 |
if (i < article_block_count_in_shm - 1) |
if (i < block_count_in_shm - 1) |
| 140 |
{ |
{ |
| 141 |
(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); |
| 142 |
} |
} |
| 143 |
else |
else |
| 144 |
{ |
{ |
| 145 |
(p_article_block_in_shm + i)->p_next_block = NULL; |
(p_block_in_shm + i)->p_next_block = NULL; |
| 146 |
pp_article_block_next = &((p_article_block_in_shm + i)->p_next_block); |
pp_block_next = &((p_block_in_shm + i)->p_next_block); |
| 147 |
} |
} |
| 148 |
} |
} |
| 149 |
} |
} |
| 150 |
|
|
| 151 |
|
p_article_block_pool->block_count = 0; |
| 152 |
|
|
| 153 |
return 0; |
return 0; |
| 154 |
} |
} |
| 155 |
|
|
| 156 |
void section_data_pool_cleanup(void) |
void article_block_cleanup(void) |
| 157 |
{ |
{ |
| 158 |
int i; |
if (p_article_block_pool != NULL) |
| 159 |
|
{ |
| 160 |
|
for (int i = 0; i < p_article_block_pool->shm_count; i++) |
| 161 |
|
{ |
| 162 |
|
if (shmdt((p_article_block_pool->shm_pool + i)->p_shm) == -1) |
| 163 |
|
{ |
| 164 |
|
log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
| 165 |
|
} |
| 166 |
|
|
| 167 |
|
if (shmctl((p_article_block_pool->shm_pool + i)->shmid, IPC_RMID, NULL) == -1) |
| 168 |
|
{ |
| 169 |
|
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", (p_article_block_pool->shm_pool + i)->shmid, errno); |
| 170 |
|
} |
| 171 |
|
} |
| 172 |
|
|
| 173 |
|
free(p_article_block_pool); |
| 174 |
|
p_article_block_pool = NULL; |
| 175 |
|
} |
| 176 |
|
} |
| 177 |
|
|
| 178 |
|
inline static ARTICLE_BLOCK *pop_free_article_block(void) |
| 179 |
|
{ |
| 180 |
|
ARTICLE_BLOCK *p_block = NULL; |
| 181 |
|
|
| 182 |
if (p_trie_dict_section_data != NULL) |
if (p_article_block_pool->p_block_free_list != NULL) |
| 183 |
{ |
{ |
| 184 |
trie_dict_destroy(p_trie_dict_section_data); |
p_block = p_article_block_pool->p_block_free_list; |
| 185 |
p_trie_dict_section_data = NULL; |
p_article_block_pool->p_block_free_list = p_block->p_next_block; |
| 186 |
section_data_count = 0; |
p_block->p_next_block = NULL; |
| 187 |
|
p_block->article_count = 0; |
| 188 |
} |
} |
| 189 |
|
|
| 190 |
if (p_section_data_pool != NULL) |
return p_block; |
| 191 |
|
} |
| 192 |
|
|
| 193 |
|
inline static void push_free_article_block(ARTICLE_BLOCK *p_block) |
| 194 |
|
{ |
| 195 |
|
p_block->p_next_block = p_article_block_pool->p_block_free_list; |
| 196 |
|
p_article_block_pool->p_block_free_list = p_block; |
| 197 |
|
} |
| 198 |
|
|
| 199 |
|
int article_block_reset(void) |
| 200 |
|
{ |
| 201 |
|
ARTICLE_BLOCK *p_block; |
| 202 |
|
|
| 203 |
|
if (p_article_block_pool == NULL) |
| 204 |
{ |
{ |
| 205 |
free(p_section_data_pool); |
log_error("article_block_pool not initialized\n"); |
| 206 |
p_section_data_pool = NULL; |
return -1; |
| 207 |
} |
} |
| 208 |
|
|
| 209 |
if (p_article_block_free_list != NULL) |
while (p_article_block_pool->block_count > 0) |
| 210 |
{ |
{ |
| 211 |
p_article_block_free_list = NULL; |
p_article_block_pool->block_count--; |
| 212 |
|
p_block = p_article_block_pool->p_block[p_article_block_pool->block_count]; |
| 213 |
|
push_free_article_block(p_block); |
| 214 |
} |
} |
| 215 |
|
|
| 216 |
if (p_article_block_shm_pool != NULL) |
return 0; |
| 217 |
|
} |
| 218 |
|
|
| 219 |
|
ARTICLE *article_block_find_by_aid(int32_t aid) |
| 220 |
|
{ |
| 221 |
|
ARTICLE_BLOCK *p_block; |
| 222 |
|
int left; |
| 223 |
|
int right; |
| 224 |
|
int mid; |
| 225 |
|
|
| 226 |
|
if (p_article_block_pool == NULL) |
| 227 |
{ |
{ |
| 228 |
for (i = 0; i < article_block_shm_count; i++) |
log_error("article_block_pool not initialized\n"); |
| 229 |
|
return NULL; |
| 230 |
|
} |
| 231 |
|
|
| 232 |
|
if (p_article_block_pool->block_count == 0) // empty |
| 233 |
|
{ |
| 234 |
|
return NULL; |
| 235 |
|
} |
| 236 |
|
|
| 237 |
|
left = 0; |
| 238 |
|
right = p_article_block_pool->block_count; |
| 239 |
|
|
| 240 |
|
// aid in the range [ head aid of blocks[left], tail aid of blocks[right - 1] ] |
| 241 |
|
while (left < right - 1) |
| 242 |
|
{ |
| 243 |
|
// get block offset no less than mid value of left and right block offsets |
| 244 |
|
mid = (left + right) / 2 + (right - left) % 2; |
| 245 |
|
|
| 246 |
|
if (mid >= p_article_block_pool->block_count) |
| 247 |
{ |
{ |
| 248 |
if (shmdt((p_article_block_shm_pool + i)->p_shm) == -1) |
log_error("block(mid = %d) is out of boundary\n", mid); |
| 249 |
{ |
return NULL; |
| 250 |
log_error("shmdt(shmid = %d) error (%d)\n", (p_article_block_shm_pool + i)->shmid, errno); |
} |
|
} |
|
| 251 |
|
|
| 252 |
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) |
| 253 |
{ |
{ |
| 254 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", (p_article_block_shm_pool + i)->shmid, errno); |
right = mid; |
|
} |
|
| 255 |
} |
} |
| 256 |
|
else |
| 257 |
|
{ |
| 258 |
|
left = mid; |
| 259 |
|
} |
| 260 |
|
} |
| 261 |
|
|
| 262 |
|
p_block = p_article_block_pool->p_block[left]; |
| 263 |
|
|
| 264 |
p_article_block_shm_pool = NULL; |
left = 0; |
| 265 |
article_block_shm_count = 0; |
right = p_block->article_count - 1; |
| 266 |
|
|
| 267 |
|
// aid in the range [ aid of articles[left], aid of articles[right] ] |
| 268 |
|
while (left < right) |
| 269 |
|
{ |
| 270 |
|
mid = (left + right) / 2; |
| 271 |
|
|
| 272 |
|
if (aid <= p_block->articles[mid].aid) |
| 273 |
|
{ |
| 274 |
|
right = mid; |
| 275 |
|
} |
| 276 |
|
else |
| 277 |
|
{ |
| 278 |
|
left = mid + 1; |
| 279 |
|
} |
| 280 |
} |
} |
| 281 |
|
|
| 282 |
|
return (p_block->articles + left); |
| 283 |
} |
} |
| 284 |
|
|
| 285 |
inline static ARTICLE_BLOCK *pop_free_article_block(void) |
ARTICLE *article_block_find_by_index(int index) |
| 286 |
{ |
{ |
| 287 |
ARTICLE_BLOCK *p_article_block = NULL; |
ARTICLE_BLOCK *p_block; |
| 288 |
|
|
| 289 |
if (p_article_block_free_list != NULL) |
if (p_article_block_pool == NULL) |
| 290 |
{ |
{ |
| 291 |
p_article_block = p_article_block_free_list; |
log_error("article_block_pool not initialized\n"); |
| 292 |
p_article_block_free_list = p_article_block_free_list->p_next_block; |
return NULL; |
| 293 |
} |
} |
| 294 |
|
|
| 295 |
return p_article_block; |
if (index < 0 || index / ARTICLE_PER_BLOCK >= p_article_block_pool->block_count) |
| 296 |
} |
{ |
| 297 |
|
log_error("section_data_find_article_by_index(%d) is out of boundary of block [0, %d)\n", index, p_article_block_pool->block_count); |
| 298 |
|
return NULL; |
| 299 |
|
} |
| 300 |
|
|
| 301 |
inline static void push_free_article_block(ARTICLE_BLOCK *p_article_block) |
p_block = p_article_block_pool->p_block[index / ARTICLE_PER_BLOCK]; |
| 302 |
{ |
|
| 303 |
p_article_block->p_next_block = p_article_block_free_list; |
if (index % ARTICLE_PER_BLOCK >= p_block->article_count) |
| 304 |
p_article_block_free_list = p_article_block; |
{ |
| 305 |
|
log_error("section_data_find_article_by_index(%d) is out of boundary of article [0, %d)\n", index, p_block->article_count); |
| 306 |
|
return NULL; |
| 307 |
|
} |
| 308 |
|
|
| 309 |
|
return (p_block->articles + (index % ARTICLE_PER_BLOCK)); |
| 310 |
} |
} |
| 311 |
|
|
| 312 |
SECTION_DATA *section_data_create(const char *sname, const char *stitle, const char *master_name) |
SECTION_LIST *section_list_create(const char *sname, const char *stitle, const char *master_name) |
| 313 |
{ |
{ |
| 314 |
SECTION_DATA *p_section; |
SECTION_LIST *p_section; |
|
int index; |
|
| 315 |
|
|
| 316 |
if (p_section_data_pool == NULL || p_trie_dict_section_data == NULL) |
if (p_section_list_pool == NULL) |
| 317 |
{ |
{ |
| 318 |
log_error("section_data not initialized\n"); |
p_section_list_pool = calloc(BBS_max_section, sizeof(SECTION_LIST)); |
| 319 |
return NULL; |
if (p_section_list_pool == NULL) |
| 320 |
|
{ |
| 321 |
|
log_error("calloc(%d SECTION_LIST) OOM\n", BBS_max_section); |
| 322 |
|
return NULL; |
| 323 |
|
} |
| 324 |
|
|
| 325 |
|
section_list_count = 0; |
| 326 |
|
} |
| 327 |
|
|
| 328 |
|
if (p_trie_dict_section_list == NULL) |
| 329 |
|
{ |
| 330 |
|
p_trie_dict_section_list = trie_dict_create(); |
| 331 |
|
if (p_trie_dict_section_list == NULL) |
| 332 |
|
{ |
| 333 |
|
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 334 |
|
return NULL; |
| 335 |
|
} |
| 336 |
} |
} |
| 337 |
|
|
| 338 |
if (section_data_count >= BBS_max_section) |
if (section_list_count >= BBS_max_section) |
| 339 |
{ |
{ |
| 340 |
log_error("section_data_count exceed limit %d\n", BBS_max_section); |
log_error("section_list_count exceed limit %d\n", BBS_max_section); |
| 341 |
return NULL; |
return NULL; |
| 342 |
} |
} |
| 343 |
|
|
| 344 |
index = section_data_count; |
p_section = p_section_list_pool + section_list_count; |
|
p_section = p_section_data_pool + index; |
|
| 345 |
|
|
| 346 |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
strncpy(p_section->sname, sname, sizeof(p_section->sname - 1)); |
| 347 |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
p_section->sname[sizeof(p_section->sname - 1)] = '\0'; |
| 352 |
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)); |
| 353 |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
| 354 |
|
|
| 355 |
p_section->p_head_block = NULL; |
if (trie_dict_set(p_trie_dict_section_list, sname, section_list_count) != 1) |
|
p_section->p_tail_block = NULL; |
|
|
p_section->block_count = 0; |
|
|
p_section->article_count = 0; |
|
|
p_section->delete_count = 0; |
|
|
|
|
|
if (trie_dict_set(p_trie_dict_section_data, sname, index) != 1) |
|
| 356 |
{ |
{ |
| 357 |
log_error("trie_dict_set(section_data, %s, %d) error\n", sname, index); |
log_error("trie_dict_set(section_data, %s, %d) error\n", sname, section_list_count); |
| 358 |
return NULL; |
return NULL; |
| 359 |
} |
} |
| 360 |
|
|
| 361 |
section_data_count++; |
section_list_reset_articles(p_section); |
| 362 |
|
|
| 363 |
|
section_list_count++; |
| 364 |
|
|
| 365 |
return p_section; |
return p_section; |
| 366 |
} |
} |
| 367 |
|
|
| 368 |
int section_data_free_block(SECTION_DATA *p_section) |
void section_list_reset_articles(SECTION_LIST *p_section) |
| 369 |
{ |
{ |
| 370 |
ARTICLE_BLOCK *p_block; |
p_section->article_count = 0; |
| 371 |
|
p_section->topic_count = 0; |
| 372 |
|
p_section->visible_article_count = 0; |
| 373 |
|
p_section->visible_topic_count = 0; |
| 374 |
|
p_section->p_article_head = NULL; |
| 375 |
|
p_section->p_article_tail = NULL; |
| 376 |
|
|
| 377 |
if (p_section == NULL) |
p_section->page_count = 0; |
| 378 |
{ |
p_section->last_page_visible_article_count = 0; |
| 379 |
log_error("section_data_free_block() NULL pointer error\n"); |
} |
|
return -1; |
|
|
} |
|
| 380 |
|
|
| 381 |
if (p_section_data_pool == NULL) |
void section_list_cleanup(void) |
| 382 |
|
{ |
| 383 |
|
if (p_trie_dict_section_list != NULL) |
| 384 |
{ |
{ |
| 385 |
log_error("section_data not initialized\n"); |
trie_dict_destroy(p_trie_dict_section_list); |
| 386 |
return -1; |
p_trie_dict_section_list = NULL; |
| 387 |
} |
} |
| 388 |
|
|
| 389 |
while (p_section->p_head_block != NULL) |
if (p_section_list_pool != NULL) |
| 390 |
{ |
{ |
| 391 |
p_block = p_section->p_head_block; |
free(p_section_list_pool); |
| 392 |
p_section->p_head_block = p_block->p_next_block; |
p_section_list_pool = NULL; |
|
push_free_article_block(p_block); |
|
| 393 |
} |
} |
| 394 |
|
|
| 395 |
p_section->p_tail_block = NULL; |
section_list_count = 0; |
|
p_section->block_count = 0; |
|
|
p_section->article_count = 0; |
|
|
p_section->delete_count = 0; |
|
|
|
|
|
return 0; |
|
| 396 |
} |
} |
| 397 |
|
|
| 398 |
SECTION_DATA *section_data_find_section_by_name(const char *sname) |
SECTION_LIST *section_list_find_by_name(const char *sname) |
| 399 |
{ |
{ |
| 400 |
int64_t index; |
int64_t index; |
| 401 |
|
|
| 402 |
if (p_section_data_pool == NULL || p_trie_dict_section_data == NULL) |
if (p_section_list_pool == NULL || p_trie_dict_section_list == NULL) |
| 403 |
{ |
{ |
| 404 |
log_error("section_data not initialized\n"); |
log_error("section_list not initialized\n"); |
| 405 |
return NULL; |
return NULL; |
| 406 |
} |
} |
| 407 |
|
|
| 408 |
if (trie_dict_get(p_trie_dict_section_data, sname, &index) != 1) |
if (trie_dict_get(p_trie_dict_section_list, sname, &index) != 1) |
| 409 |
{ |
{ |
| 410 |
log_error("trie_dict_get(section_data, %s) error\n", sname); |
log_error("trie_dict_get(section_data, %s) error\n", sname); |
| 411 |
return NULL; |
return NULL; |
| 412 |
} |
} |
| 413 |
|
|
| 414 |
return (p_section_data_pool + index); |
return (p_section_list_pool + index); |
| 415 |
} |
} |
| 416 |
|
|
| 417 |
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) |
| 418 |
{ |
{ |
| 419 |
ARTICLE_BLOCK *p_block; |
ARTICLE_BLOCK *p_block; |
| 420 |
int32_t last_aid = 0; |
int32_t last_aid = 0; |
| 421 |
|
ARTICLE *p_article; |
| 422 |
ARTICLE *p_topic_head; |
ARTICLE *p_topic_head; |
| 423 |
ARTICLE *p_topic_tail; |
ARTICLE *p_topic_tail; |
| 424 |
|
|
| 425 |
if (p_section == NULL || p_article == NULL) |
if (p_section == NULL || p_article_src == NULL) |
| 426 |
{ |
{ |
| 427 |
log_error("section_data_append_article() NULL pointer error\n"); |
log_error("section_list_append_article() NULL pointer error\n"); |
| 428 |
return -1; |
return -1; |
| 429 |
} |
} |
| 430 |
|
|
| 431 |
if (p_section_data_pool == NULL) |
if (p_article_block_pool == NULL) |
| 432 |
{ |
{ |
| 433 |
log_error("section_data not initialized\n"); |
log_error("article_block_pool not initialized\n"); |
| 434 |
return -1; |
return -1; |
| 435 |
} |
} |
| 436 |
|
|
| 437 |
if (p_section->p_tail_block == NULL || p_section->p_tail_block->article_count >= BBS_article_limit_per_block) |
if (p_article_block_pool->block_count == 0 || |
| 438 |
|
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count >= ARTICLE_PER_BLOCK) |
| 439 |
{ |
{ |
|
if (p_section->block_count >= BBS_article_block_limit_per_section) |
|
|
{ |
|
|
log_error("section block count %d reach limit\n", p_section->block_count); |
|
|
return -2; |
|
|
} |
|
|
|
|
| 440 |
if ((p_block = pop_free_article_block()) == NULL) |
if ((p_block = pop_free_article_block()) == NULL) |
| 441 |
{ |
{ |
| 442 |
log_error("pop_free_article_block() error\n"); |
log_error("pop_free_article_block() error\n"); |
| 443 |
return -2; |
return -2; |
| 444 |
} |
} |
| 445 |
|
|
| 446 |
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) |
|
| 447 |
{ |
{ |
| 448 |
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; |
|
| 449 |
} |
} |
| 450 |
else |
|
| 451 |
{ |
p_article_block_pool->p_block[p_article_block_pool->block_count] = p_block; |
| 452 |
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++; |
|
| 453 |
} |
} |
| 454 |
else |
else |
| 455 |
{ |
{ |
| 456 |
p_block = p_section->p_tail_block; |
p_block = p_article_block_pool->p_block[p_article_block_pool->block_count - 1]; |
| 457 |
last_aid = p_block->articles[p_block->article_count - 1].aid; |
last_aid = p_block->articles[p_block->article_count - 1].aid; |
| 458 |
} |
} |
| 459 |
|
|
| 460 |
// AID of articles should be strictly ascending |
// AID of articles should be strictly ascending |
| 461 |
if (p_article->aid <= last_aid) |
if (p_article_src->aid <= last_aid) |
| 462 |
{ |
{ |
| 463 |
log_error("section_data_append_article(aid=%d) error: last_aid=%d\n", p_article->aid, last_aid); |
log_error("section_data_append_article(aid=%d) error: last_aid=%d\n", p_article_src->aid, last_aid); |
| 464 |
return -3; |
return -3; |
| 465 |
} |
} |
| 466 |
|
|
| 467 |
if (p_block->article_count == 0) |
p_article = (p_block->articles + p_block->article_count); |
| 468 |
|
p_block->article_count++; |
| 469 |
|
p_section->article_count++; |
| 470 |
|
|
| 471 |
|
// Copy article data |
| 472 |
|
*p_article = *p_article_src; |
| 473 |
|
|
| 474 |
|
if (p_article->visible) |
| 475 |
{ |
{ |
| 476 |
p_section->block_head_aid[p_section->block_count - 1] = p_article->aid; |
p_section->visible_article_count++; |
| 477 |
} |
} |
| 478 |
|
|
| 479 |
|
// Link appended article as tail node of topic bi-directional list |
| 480 |
if (p_article->tid != 0) |
if (p_article->tid != 0) |
| 481 |
{ |
{ |
| 482 |
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); |
| 483 |
if (p_topic_head == NULL) |
if (p_topic_head == NULL) |
| 484 |
{ |
{ |
| 485 |
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); |
| 486 |
return -4; |
return -4; |
| 487 |
} |
} |
| 488 |
|
|
| 489 |
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; |
| 490 |
if (p_topic_tail == NULL) |
if (p_topic_tail == NULL) |
| 491 |
{ |
{ |
| 492 |
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); |
| 493 |
return -4; |
return -4; |
| 494 |
} |
} |
| 495 |
} |
} |
| 496 |
else |
else |
| 497 |
{ |
{ |
| 498 |
p_topic_head = &(p_block->articles[p_block->article_count]); |
p_section->topic_count++; |
| 499 |
p_topic_tail = p_topic_head; |
|
| 500 |
|
if (p_article->visible) |
| 501 |
|
{ |
| 502 |
|
p_section->visible_topic_count++; |
| 503 |
|
} |
| 504 |
|
|
| 505 |
|
p_topic_head = p_article; |
| 506 |
|
p_topic_tail = p_article; |
| 507 |
} |
} |
| 508 |
|
|
| 509 |
// Copy article data |
p_article->p_topic_prior = p_topic_tail; |
| 510 |
p_block->articles[p_block->article_count] = *p_article; |
p_article->p_topic_next = p_topic_head; |
| 511 |
|
p_topic_head->p_topic_prior = p_article; |
| 512 |
|
p_topic_tail->p_topic_next = p_article; |
| 513 |
|
|
| 514 |
// Link appended article as tail node of topic bi-directional list; |
// Link appended article as tail node of article bi-directional list |
| 515 |
p_block->articles[p_block->article_count].prior_aid = p_topic_tail->aid; |
if (p_section->p_article_head == NULL) |
| 516 |
p_block->articles[p_block->article_count].next_aid = p_topic_head->aid; |
{ |
| 517 |
p_topic_head->prior_aid = p_article->aid; |
p_section->p_article_head = p_article; |
| 518 |
p_topic_tail->next_aid = p_article->aid; |
p_section->p_article_tail = p_article; |
| 519 |
|
} |
| 520 |
|
p_article->p_prior = p_section->p_article_tail; |
| 521 |
|
p_article->p_next = p_section->p_article_head; |
| 522 |
|
p_section->p_article_head->p_prior = p_article; |
| 523 |
|
p_section->p_article_tail->p_next = p_article; |
| 524 |
|
p_section->p_article_tail = p_article; |
| 525 |
|
|
| 526 |
p_block->article_count++; |
// Update page |
| 527 |
p_section->article_count++; |
if (p_article->visible && p_section->last_page_visible_article_count % BBS_article_limit_per_page == 0) |
| 528 |
|
{ |
| 529 |
|
p_section->p_page_first_article[p_section->page_count] = p_article; |
| 530 |
|
p_section->page_count++; |
| 531 |
|
p_section->last_page_visible_article_count = 0; |
| 532 |
|
} |
| 533 |
|
p_section->last_page_visible_article_count++; |
| 534 |
|
|
| 535 |
return 0; |
return 0; |
| 536 |
} |
} |
| 537 |
|
|
| 538 |
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) |
| 539 |
|
{ |
| 540 |
|
ARTICLE *p_article; |
| 541 |
|
ARTICLE *p_reply; |
| 542 |
|
int affected_count = 0; |
| 543 |
|
|
| 544 |
|
if (p_section == NULL) |
| 545 |
|
{ |
| 546 |
|
log_error("section_list_set_article_visible() NULL pointer error\n"); |
| 547 |
|
return -2; |
| 548 |
|
} |
| 549 |
|
|
| 550 |
|
p_article = article_block_find_by_aid(aid); |
| 551 |
|
if (p_article == NULL) |
| 552 |
|
{ |
| 553 |
|
return -1; // Not found |
| 554 |
|
} |
| 555 |
|
|
| 556 |
|
if (p_article->visible == visible) |
| 557 |
|
{ |
| 558 |
|
return 0; // Already set |
| 559 |
|
} |
| 560 |
|
|
| 561 |
|
if (visible == 0) // 1 -> 0 |
| 562 |
|
{ |
| 563 |
|
p_section->visible_article_count--; |
| 564 |
|
|
| 565 |
|
if (p_article->tid == 0) |
| 566 |
|
{ |
| 567 |
|
p_section->visible_topic_count--; |
| 568 |
|
|
| 569 |
|
// Set related visible replies to invisible |
| 570 |
|
for (p_reply = p_article->p_topic_next; p_reply->tid != 0; p_reply = p_reply->p_topic_next) |
| 571 |
|
{ |
| 572 |
|
if (p_reply->tid != aid) |
| 573 |
|
{ |
| 574 |
|
log_error("Inconsistent tid = %d found in reply %d of topic %d\n", p_reply->tid, p_reply->aid, aid); |
| 575 |
|
continue; |
| 576 |
|
} |
| 577 |
|
|
| 578 |
|
if (p_reply->visible == 1) |
| 579 |
|
{ |
| 580 |
|
p_reply->visible = 0; |
| 581 |
|
p_section->visible_article_count--; |
| 582 |
|
affected_count++; |
| 583 |
|
} |
| 584 |
|
} |
| 585 |
|
} |
| 586 |
|
} |
| 587 |
|
else // 0 -> 1 |
| 588 |
|
{ |
| 589 |
|
p_section->visible_article_count++; |
| 590 |
|
|
| 591 |
|
if (p_article->tid == 0) |
| 592 |
|
{ |
| 593 |
|
p_section->visible_topic_count++; |
| 594 |
|
} |
| 595 |
|
} |
| 596 |
|
|
| 597 |
|
p_article->visible = visible; |
| 598 |
|
affected_count++; |
| 599 |
|
|
| 600 |
|
return affected_count; |
| 601 |
|
} |
| 602 |
|
|
| 603 |
|
ARTICLE *section_list_find_article_with_offset(SECTION_LIST *p_section, int32_t aid, int32_t *p_page, int32_t *p_offset) |
| 604 |
{ |
{ |
| 605 |
ARTICLE *p_article; |
ARTICLE *p_article; |
|
ARTICLE_BLOCK *p_block; |
|
| 606 |
int left; |
int left; |
| 607 |
int right; |
int right; |
| 608 |
int mid; |
int mid; |
| 609 |
|
|
| 610 |
|
*p_page = -1; |
| 611 |
|
*p_offset = -1; |
| 612 |
|
|
| 613 |
if (p_section == NULL) |
if (p_section == NULL) |
| 614 |
{ |
{ |
| 615 |
log_error("section_data_find_article_by_aid() NULL pointer error\n"); |
log_error("section_list_find_article_with_offset() NULL pointer error\n"); |
| 616 |
return NULL; |
return NULL; |
| 617 |
} |
} |
| 618 |
|
|
| 619 |
if (p_section->block_count == 0) // empty section |
if (p_section->article_count == 0) // empty |
| 620 |
{ |
{ |
| 621 |
|
*p_page = 0; |
| 622 |
|
*p_offset = 0; |
| 623 |
return NULL; |
return NULL; |
| 624 |
} |
} |
| 625 |
|
|
| 626 |
left = 0; |
left = 0; |
| 627 |
right = p_section->block_count; |
right = p_section->page_count; |
| 628 |
|
|
| 629 |
// 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] ] |
| 630 |
while (left < right - 1) |
while (left < right - 1) |
| 631 |
{ |
{ |
| 632 |
// 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 |
| 633 |
mid = (left + right) / 2 + (right - left) % 2; |
mid = (left + right) / 2 + (right - left) % 2; |
| 634 |
|
|
| 635 |
if (mid >= BBS_article_block_limit_per_section) |
if (mid >= p_section->page_count) |
| 636 |
{ |
{ |
| 637 |
log_error("block_m(%d) is out of boundary\n", mid); |
log_error("page id (mid = %d) is out of boundary\n", mid); |
| 638 |
return NULL; |
return NULL; |
| 639 |
} |
} |
| 640 |
|
|
| 641 |
if (aid < p_section->block_head_aid[mid]) |
if (aid < p_section->p_page_first_article[mid]->aid) |
| 642 |
{ |
{ |
| 643 |
right = mid; |
right = mid; |
| 644 |
} |
} |
| 648 |
} |
} |
| 649 |
} |
} |
| 650 |
|
|
| 651 |
p_block = p_section->p_block[left]; |
*p_page = left; |
| 652 |
|
|
| 653 |
|
p_article = p_section->p_page_first_article[*p_page]; |
| 654 |
|
|
| 655 |
|
// p_section->p_page_first_article[*p_page]->aid <= aid < p_section->p_page_first_article[*p_page + 1]->aid |
| 656 |
|
right = (*p_page == p_section->page_count - 1 ? INT32_MAX : p_section->p_page_first_article[*p_page + 1]->aid); |
| 657 |
|
|
| 658 |
|
// left will be the offset of article found or offset to insert |
| 659 |
left = 0; |
left = 0; |
|
right = p_block->article_count - 1; |
|
| 660 |
|
|
| 661 |
// aid in the range [ aid of articles[left], aid of articles[right] ] |
while (1) |
|
while (left < right) |
|
| 662 |
{ |
{ |
| 663 |
mid = (left + right) / 2; |
if (aid == p_article->aid) // found |
|
|
|
|
if (aid <= p_block->articles[mid].aid) |
|
| 664 |
{ |
{ |
| 665 |
right = mid; |
break; |
| 666 |
} |
} |
| 667 |
else |
else if (aid < p_article->aid) // not exist |
| 668 |
{ |
{ |
| 669 |
left = mid + 1; |
p_article = NULL; |
| 670 |
|
break; |
| 671 |
} |
} |
|
} |
|
|
|
|
|
p_article = &(p_block->articles[left]); |
|
|
|
|
|
return p_article; |
|
|
} |
|
| 672 |
|
|
| 673 |
ARTICLE *section_data_find_article_by_index(SECTION_DATA *p_section, int index) |
// aid > p_article->aid |
| 674 |
{ |
p_article = p_article->p_next; |
| 675 |
ARTICLE *p_article; |
left++; |
|
ARTICLE_BLOCK *p_block; |
|
| 676 |
|
|
| 677 |
if (p_section == NULL) |
// over last article in the page |
| 678 |
{ |
if (p_article == p_section->p_article_head || p_article->aid >= right) |
| 679 |
log_error("section_data_find_article_by_index() NULL pointer error\n"); |
{ |
| 680 |
return NULL; |
p_article = NULL; |
| 681 |
} |
break; |
| 682 |
|
} |
|
if (index < 0 || index >= p_section->article_count) |
|
|
{ |
|
|
log_error("section_data_find_article_by_index(%d) is out of boundary [0, %d)\n", index, p_section->article_count); |
|
|
return NULL; |
|
| 683 |
} |
} |
| 684 |
|
|
| 685 |
p_block = p_section->p_block[index / BBS_article_limit_per_block]; |
*p_offset = left; |
|
p_article = &(p_block->articles[index % BBS_article_limit_per_block]); |
|
| 686 |
|
|
| 687 |
return p_article; |
return p_article; |
| 688 |
} |
} |
| 689 |
|
|
| 690 |
int section_data_mark_del_article(SECTION_DATA *p_section, int32_t aid) |
int section_list_calculate_page(SECTION_LIST *p_section, int32_t start_aid) |
| 691 |
{ |
{ |
| 692 |
ARTICLE *p_article; |
// ARTICLE *p_article; |
| 693 |
|
|
| 694 |
if (p_section == NULL) |
if (p_section == NULL) |
| 695 |
{ |
{ |
| 696 |
log_error("section_data_mark_del_article() NULL pointer error\n"); |
log_error("section_list_calculate_page() NULL pointer error\n"); |
| 697 |
return -2; |
return -1; |
|
} |
|
|
|
|
|
p_article = section_data_find_article_by_aid(p_section, aid); |
|
|
if (p_article == NULL) |
|
|
{ |
|
|
return -1; // Not found |
|
|
} |
|
|
|
|
|
if (p_article->visible == 0) |
|
|
{ |
|
|
return 0; // Already deleted |
|
| 698 |
} |
} |
| 699 |
|
|
| 700 |
p_article->visible = 0; |
return 0; |
|
p_section->delete_count++; |
|
|
|
|
|
return 1; |
|
| 701 |
} |
} |