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/* SPDX-License-Identifier: GPL-3.0-or-later */
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/*
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* section_list
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* - data models and basic operations of section and article
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*
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* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "log.h"
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#include "section_list.h"
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#include "trie_dict.h"
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#include "user_list.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/sem.h>
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#include <sys/stat.h>
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#if defined(_SEM_SEMUN_UNDEFINED) || defined(__CYGWIN__)
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union semun
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{
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| 32 |
int val; /* Value for SETVAL */
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| 33 |
struct semid_ds *buf; /* Buffer for IPC_STAT, IPC_SET */
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unsigned short *array; /* Array for GETALL, SETALL */
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struct seminfo *__buf; /* Buffer for IPC_INFO
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(Linux-specific) */
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};
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#endif // #if defined(_SEM_SEMUN_UNDEFINED)
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enum _section_list_constant_t
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{
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SECTION_TRY_LOCK_WAIT_TIME = 1, // second
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SECTION_TRY_LOCK_TIMES = 10,
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SECTION_DEAD_LOCK_TIMEOUT = 15, // second
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ARTICLE_BLOCK_PER_SHM = 1000, // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate
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ARTICLE_BLOCK_SHM_COUNT_LIMIT = 80, // limited by length (8-bit) of proj_id in ftok(path, proj_id)
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ARTICLE_BLOCK_PER_POOL = (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT),
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CALCULATE_PAGE_THRESHOLD = 100, // Adjust to tune performance of moving topic between sections
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SID_STR_LEN = 5, // 32-bit + NULL
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};
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struct article_block_t
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{
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ARTICLE articles[BBS_article_count_per_block];
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int article_count;
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struct article_block_t *p_next_block;
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};
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typedef struct article_block_t ARTICLE_BLOCK;
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struct article_block_pool_t
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{
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size_t shm_size;
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struct
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{
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size_t shm_size;
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void *p_shm;
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} shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT];
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int shm_count;
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ARTICLE_BLOCK *p_block_free_list;
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ARTICLE_BLOCK *p_block[ARTICLE_BLOCK_PER_POOL];
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int block_count;
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};
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typedef struct article_block_pool_t ARTICLE_BLOCK_POOL;
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static char article_block_shm_name[FILE_NAME_LEN];
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static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL;
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static char section_list_shm_name[FILE_NAME_LEN];
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SECTION_LIST_POOL *p_section_list_pool = NULL;
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#ifndef HAVE_SYSTEM_V
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static int section_list_reset_lock(SECTION_LIST *p_section);
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#endif
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int article_block_init(const char *filename, int block_count)
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{
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char filepath[FILE_PATH_LEN];
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int fd;
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size_t size;
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void *p_shm;
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int i;
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int block_count_in_shm;
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ARTICLE_BLOCK *p_block_in_shm;
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ARTICLE_BLOCK **pp_block_next;
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if (p_article_block_pool != NULL)
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{
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log_error("article_block_pool already initialized\n");
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return -1;
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}
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if (block_count <= 0 || block_count > ARTICLE_BLOCK_PER_POOL)
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{
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log_error("article_block_count exceed limit %d\n", ARTICLE_BLOCK_PER_POOL);
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return -2;
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}
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strncpy(filepath, filename, sizeof(filepath) - 1);
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filepath[sizeof(filepath) - 1] = '\0';
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snprintf(article_block_shm_name, sizeof(article_block_shm_name), "/ARTICLE_BLOCK_SHM_%s", basename(filepath));
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// Allocate shared memory
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size = sizeof(ARTICLE_BLOCK_POOL);
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snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, ARTICLE_BLOCK_SHM_COUNT_LIMIT);
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if (shm_unlink(filepath) == -1 && errno != ENOENT)
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{
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log_error("shm_unlink(%s) error (%d)\n", filepath, errno);
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return -2;
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}
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if ((fd = shm_open(filepath, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1)
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{
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log_error("shm_open(%s) error (%d)\n", filepath, errno);
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return -2;
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}
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if (ftruncate(fd, (off_t)size) == -1)
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{
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log_error("ftruncate(size=%d) error (%d)\n", size, errno);
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close(fd);
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return -2;
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}
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p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L);
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if (p_shm == MAP_FAILED)
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{
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log_error("mmap() error (%d)\n", errno);
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close(fd);
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return -2;
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}
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if (close(fd) < 0)
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{
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log_error("close(fd) error (%d)\n", errno);
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return -1;
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}
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p_article_block_pool = p_shm;
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p_article_block_pool->shm_size = size;
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p_article_block_pool->shm_count = 0;
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pp_block_next = &(p_article_block_pool->p_block_free_list);
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while (block_count > 0)
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{
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block_count_in_shm = MIN(block_count, ARTICLE_BLOCK_PER_SHM);
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block_count -= block_count_in_shm;
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size = sizeof(ARTICLE_BLOCK) * (size_t)block_count_in_shm;
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snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, p_article_block_pool->shm_count);
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if (shm_unlink(filepath) == -1 && errno != ENOENT)
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{
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log_error("shm_unlink(%s) error (%d)\n", filepath, errno);
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return -2;
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}
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if ((fd = shm_open(filepath, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1)
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{
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log_error("shm_open(%s) error (%d)\n", filepath, errno);
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return -2;
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}
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if (ftruncate(fd, (off_t)size) == -1)
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{
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log_error("ftruncate(size=%d) error (%d)\n", size, errno);
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close(fd);
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return -2;
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}
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p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L);
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if (p_shm == MAP_FAILED)
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{
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log_error("mmap() error (%d)\n", errno);
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close(fd);
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return -2;
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}
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if (close(fd) < 0)
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{
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log_error("close(fd) error (%d)\n", errno);
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return -1;
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}
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(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->shm_size = size;
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(p_article_block_pool->shm_pool + p_article_block_pool->shm_count)->p_shm = p_shm;
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p_article_block_pool->shm_count++;
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p_block_in_shm = p_shm;
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*pp_block_next = p_block_in_shm;
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for (i = 0; i < block_count_in_shm; i++)
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{
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if (i < block_count_in_shm - 1)
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{
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(p_block_in_shm + i)->p_next_block = (p_block_in_shm + i + 1);
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}
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else
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{
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(p_block_in_shm + i)->p_next_block = NULL;
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pp_block_next = &((p_block_in_shm + i)->p_next_block);
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}
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}
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}
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p_article_block_pool->block_count = 0;
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return 0;
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}
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void article_block_cleanup(void)
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{
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char filepath[FILE_PATH_LEN];
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if (p_article_block_pool == NULL)
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{
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return;
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}
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for (int i = 0; i < p_article_block_pool->shm_count; i++)
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{
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snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, i);
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if (shm_unlink(filepath) == -1 && errno != ENOENT)
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{
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log_error("shm_unlink(%s) error (%d)\n", filepath, errno);
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}
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}
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snprintf(filepath, sizeof(filepath), "%s_%d", article_block_shm_name, ARTICLE_BLOCK_SHM_COUNT_LIMIT);
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if (shm_unlink(filepath) == -1 && errno != ENOENT)
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{
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log_error("shm_unlink(%s) error (%d)\n", filepath, errno);
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}
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detach_article_block_shm();
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}
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int set_article_block_shm_readonly(void)
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{
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int i;
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if (p_article_block_pool == NULL)
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{
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log_error("article_block_pool not initialized\n");
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return -1;
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}
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for (i = 0; i < p_article_block_pool->shm_count; i++)
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{
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if ((p_article_block_pool->shm_pool + i)->p_shm != NULL &&
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mprotect((p_article_block_pool->shm_pool + i)->p_shm, (p_article_block_pool->shm_pool + i)->shm_size, PROT_READ) < 0)
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{
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log_error("mprotect() error (%d)\n", errno);
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return -2;
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}
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}
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if (p_article_block_pool != NULL &&
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mprotect(p_article_block_pool, p_article_block_pool->shm_size, PROT_READ) < 0)
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{
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log_error("mprotect() error (%d)\n", errno);
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return -3;
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}
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return 0;
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}
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int detach_article_block_shm(void)
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{
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if (p_article_block_pool == NULL)
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{
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return -1;
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}
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for (int i = 0; i < p_article_block_pool->shm_count; i++)
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{
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if ((p_article_block_pool->shm_pool + i)->p_shm != NULL &&
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munmap((p_article_block_pool->shm_pool + i)->p_shm, (p_article_block_pool->shm_pool + i)->shm_size) < 0)
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{
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log_error("munmap() error (%d)\n", errno);
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return -2;
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}
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}
|
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if (p_article_block_pool != NULL && munmap(p_article_block_pool, p_article_block_pool->shm_size) < 0)
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{
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log_error("munmap() error (%d)\n", errno);
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return -3;
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}
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p_article_block_pool = NULL;
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return 0;
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}
|
| 309 |
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| 310 |
inline static ARTICLE_BLOCK *pop_free_article_block(void)
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| 311 |
{
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| 312 |
ARTICLE_BLOCK *p_block = NULL;
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if (p_article_block_pool->p_block_free_list != NULL)
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| 315 |
{
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| 316 |
p_block = p_article_block_pool->p_block_free_list;
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p_article_block_pool->p_block_free_list = p_block->p_next_block;
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p_block->p_next_block = NULL;
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p_block->article_count = 0;
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}
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return p_block;
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}
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inline static void push_free_article_block(ARTICLE_BLOCK *p_block)
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| 326 |
{
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p_block->p_next_block = p_article_block_pool->p_block_free_list;
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p_article_block_pool->p_block_free_list = p_block;
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}
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| 330 |
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| 331 |
int article_block_reset(void)
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| 332 |
{
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| 333 |
ARTICLE_BLOCK *p_block;
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| 335 |
if (p_article_block_pool == NULL)
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| 336 |
{
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| 337 |
log_error("article_block_pool not initialized\n");
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| 338 |
return -1;
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| 339 |
}
|
| 340 |
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| 341 |
while (p_article_block_pool->block_count > 0)
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| 342 |
{
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| 343 |
p_article_block_pool->block_count--;
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| 344 |
p_block = p_article_block_pool->p_block[p_article_block_pool->block_count];
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| 345 |
push_free_article_block(p_block);
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| 346 |
}
|
| 347 |
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| 348 |
return 0;
|
| 349 |
}
|
| 350 |
|
| 351 |
ARTICLE *article_block_find_by_aid(int32_t aid)
|
| 352 |
{
|
| 353 |
ARTICLE_BLOCK *p_block;
|
| 354 |
int left;
|
| 355 |
int right;
|
| 356 |
int mid;
|
| 357 |
|
| 358 |
if (p_article_block_pool == NULL)
|
| 359 |
{
|
| 360 |
log_error("article_block_pool not initialized\n");
|
| 361 |
return NULL;
|
| 362 |
}
|
| 363 |
|
| 364 |
if (p_article_block_pool->block_count == 0) // empty
|
| 365 |
{
|
| 366 |
return NULL;
|
| 367 |
}
|
| 368 |
|
| 369 |
left = 0;
|
| 370 |
right = p_article_block_pool->block_count - 1;
|
| 371 |
|
| 372 |
// aid in the range [ head aid of blocks[left], tail aid of blocks[right] ]
|
| 373 |
while (left < right)
|
| 374 |
{
|
| 375 |
// get block offset no less than mid value of left and right block offsets
|
| 376 |
mid = (left + right) / 2 + (left + right) % 2;
|
| 377 |
|
| 378 |
if (aid < p_article_block_pool->p_block[mid]->articles[0].aid)
|
| 379 |
{
|
| 380 |
right = mid - 1;
|
| 381 |
}
|
| 382 |
else // if (aid >= p_article_block_pool->p_block[mid]->articles[0].aid)
|
| 383 |
{
|
| 384 |
left = mid;
|
| 385 |
}
|
| 386 |
}
|
| 387 |
|
| 388 |
p_block = p_article_block_pool->p_block[left];
|
| 389 |
|
| 390 |
left = 0;
|
| 391 |
right = p_block->article_count - 1;
|
| 392 |
|
| 393 |
// aid in the range [ aid of articles[left], aid of articles[right] ]
|
| 394 |
while (left < right)
|
| 395 |
{
|
| 396 |
mid = (left + right) / 2;
|
| 397 |
|
| 398 |
if (aid <= p_block->articles[mid].aid)
|
| 399 |
{
|
| 400 |
right = mid;
|
| 401 |
}
|
| 402 |
else
|
| 403 |
{
|
| 404 |
left = mid + 1;
|
| 405 |
}
|
| 406 |
}
|
| 407 |
|
| 408 |
if (aid != p_block->articles[left].aid) // not found
|
| 409 |
{
|
| 410 |
return NULL;
|
| 411 |
}
|
| 412 |
|
| 413 |
return (p_block->articles + left); // found
|
| 414 |
}
|
| 415 |
|
| 416 |
ARTICLE *article_block_find_by_index(int index)
|
| 417 |
{
|
| 418 |
ARTICLE_BLOCK *p_block;
|
| 419 |
|
| 420 |
if (p_article_block_pool == NULL)
|
| 421 |
{
|
| 422 |
log_error("article_block_pool not initialized\n");
|
| 423 |
return NULL;
|
| 424 |
}
|
| 425 |
|
| 426 |
if (index < 0 || index / BBS_article_count_per_block >= p_article_block_pool->block_count)
|
| 427 |
{
|
| 428 |
log_error("article_block_find_by_index(%d) is out of boundary of block [0, %d)\n", index, p_article_block_pool->block_count);
|
| 429 |
return NULL;
|
| 430 |
}
|
| 431 |
|
| 432 |
p_block = p_article_block_pool->p_block[index / BBS_article_count_per_block];
|
| 433 |
|
| 434 |
if (index % BBS_article_count_per_block >= p_block->article_count)
|
| 435 |
{
|
| 436 |
log_error("article_block_find_by_index(%d) is out of boundary of article [0, %d)\n", index, p_block->article_count);
|
| 437 |
return NULL;
|
| 438 |
}
|
| 439 |
|
| 440 |
return (p_block->articles + (index % BBS_article_count_per_block));
|
| 441 |
}
|
| 442 |
|
| 443 |
extern int section_list_init(const char *filename)
|
| 444 |
{
|
| 445 |
char filepath[FILE_PATH_LEN];
|
| 446 |
int fd;
|
| 447 |
size_t size;
|
| 448 |
void *p_shm;
|
| 449 |
#ifdef HAVE_SYSTEM_V
|
| 450 |
int proj_id;
|
| 451 |
key_t key;
|
| 452 |
int semid;
|
| 453 |
union semun arg;
|
| 454 |
#endif
|
| 455 |
int i;
|
| 456 |
|
| 457 |
if (p_section_list_pool != NULL)
|
| 458 |
{
|
| 459 |
section_list_cleanup();
|
| 460 |
}
|
| 461 |
|
| 462 |
// Allocate shared memory
|
| 463 |
size = sizeof(SECTION_LIST_POOL);
|
| 464 |
|
| 465 |
strncpy(filepath, filename, sizeof(filepath) - 1);
|
| 466 |
filepath[sizeof(filepath) - 1] = '\0';
|
| 467 |
snprintf(section_list_shm_name, sizeof(section_list_shm_name), "/SECTION_LIST_SHM_%s", basename(filepath));
|
| 468 |
|
| 469 |
if (shm_unlink(section_list_shm_name) == -1 && errno != ENOENT)
|
| 470 |
{
|
| 471 |
log_error("shm_unlink(%s) error (%d)\n", section_list_shm_name, errno);
|
| 472 |
return -2;
|
| 473 |
}
|
| 474 |
|
| 475 |
if ((fd = shm_open(section_list_shm_name, O_CREAT | O_EXCL | O_RDWR, 0600)) == -1)
|
| 476 |
{
|
| 477 |
log_error("shm_open(%s) error (%d)\n", section_list_shm_name, errno);
|
| 478 |
return -2;
|
| 479 |
}
|
| 480 |
if (ftruncate(fd, (off_t)size) == -1)
|
| 481 |
{
|
| 482 |
log_error("ftruncate(size=%d) error (%d)\n", size, errno);
|
| 483 |
close(fd);
|
| 484 |
return -2;
|
| 485 |
}
|
| 486 |
|
| 487 |
p_shm = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0L);
|
| 488 |
if (p_shm == MAP_FAILED)
|
| 489 |
{
|
| 490 |
log_error("mmap() error (%d)\n", errno);
|
| 491 |
close(fd);
|
| 492 |
return -2;
|
| 493 |
}
|
| 494 |
|
| 495 |
if (close(fd) < 0)
|
| 496 |
{
|
| 497 |
log_error("close(fd) error (%d)\n", errno);
|
| 498 |
return -1;
|
| 499 |
}
|
| 500 |
|
| 501 |
p_section_list_pool = p_shm;
|
| 502 |
p_section_list_pool->shm_size = size;
|
| 503 |
p_section_list_pool->section_count = 0;
|
| 504 |
|
| 505 |
// Allocate semaphore as section locks
|
| 506 |
#ifndef HAVE_SYSTEM_V
|
| 507 |
for (i = 0; i <= BBS_max_section; i++)
|
| 508 |
{
|
| 509 |
if (sem_init(&(p_section_list_pool->sem[i]), 1, 1) == -1)
|
| 510 |
{
|
| 511 |
log_error("sem_init(sem[%d]) error (%d)\n", i, errno);
|
| 512 |
return -3;
|
| 513 |
}
|
| 514 |
|
| 515 |
p_section_list_pool->read_lock_count[i] = 0;
|
| 516 |
p_section_list_pool->write_lock_count[i] = 0;
|
| 517 |
}
|
| 518 |
#else
|
| 519 |
proj_id = (int)(time(NULL) % getpid());
|
| 520 |
key = ftok(filename, proj_id);
|
| 521 |
if (key == -1)
|
| 522 |
{
|
| 523 |
log_error("ftok(%s, %d) error (%d)\n", filename, proj_id, errno);
|
| 524 |
return -3;
|
| 525 |
}
|
| 526 |
|
| 527 |
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections
|
| 528 |
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600);
|
| 529 |
if (semid == -1)
|
| 530 |
{
|
| 531 |
log_error("semget(section_list_pool_sem, size = %d) error (%d)\n", size, errno);
|
| 532 |
return -3;
|
| 533 |
}
|
| 534 |
|
| 535 |
// Initialize sem value to 0
|
| 536 |
arg.val = 0;
|
| 537 |
for (i = 0; i < size; i++)
|
| 538 |
{
|
| 539 |
if (semctl(semid, i, SETVAL, arg) == -1)
|
| 540 |
{
|
| 541 |
log_error("semctl(section_list_pool_sem, SETVAL) error (%d)\n", errno);
|
| 542 |
return -3;
|
| 543 |
}
|
| 544 |
}
|
| 545 |
|
| 546 |
p_section_list_pool->semid = semid;
|
| 547 |
#endif
|
| 548 |
|
| 549 |
p_section_list_pool->p_trie_dict_section_by_name = trie_dict_create();
|
| 550 |
if (p_section_list_pool->p_trie_dict_section_by_name == NULL)
|
| 551 |
{
|
| 552 |
log_error("trie_dict_create() OOM\n", BBS_max_section);
|
| 553 |
return -2;
|
| 554 |
}
|
| 555 |
|
| 556 |
p_section_list_pool->p_trie_dict_section_by_sid = trie_dict_create();
|
| 557 |
if (p_section_list_pool->p_trie_dict_section_by_sid == NULL)
|
| 558 |
{
|
| 559 |
log_error("trie_dict_create() OOM\n", BBS_max_section);
|
| 560 |
return -2;
|
| 561 |
}
|
| 562 |
|
| 563 |
return 0;
|
| 564 |
}
|
| 565 |
|
| 566 |
void section_list_cleanup(void)
|
| 567 |
{
|
| 568 |
if (p_section_list_pool == NULL)
|
| 569 |
{
|
| 570 |
return;
|
| 571 |
}
|
| 572 |
|
| 573 |
if (p_section_list_pool->p_trie_dict_section_by_name != NULL)
|
| 574 |
{
|
| 575 |
trie_dict_destroy(p_section_list_pool->p_trie_dict_section_by_name);
|
| 576 |
p_section_list_pool->p_trie_dict_section_by_name = NULL;
|
| 577 |
}
|
| 578 |
|
| 579 |
if (p_section_list_pool->p_trie_dict_section_by_sid != NULL)
|
| 580 |
{
|
| 581 |
trie_dict_destroy(p_section_list_pool->p_trie_dict_section_by_sid);
|
| 582 |
p_section_list_pool->p_trie_dict_section_by_sid = NULL;
|
| 583 |
}
|
| 584 |
|
| 585 |
#ifdef HAVE_SYSTEM_V
|
| 586 |
if (semctl(p_section_list_pool->semid, 0, IPC_RMID) == -1)
|
| 587 |
{
|
| 588 |
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", p_section_list_pool->semid, errno);
|
| 589 |
}
|
| 590 |
#else
|
| 591 |
for (int i = 0; i <= BBS_max_section; i++)
|
| 592 |
{
|
| 593 |
if (sem_destroy(&(p_section_list_pool->sem[i])) == -1)
|
| 594 |
{
|
| 595 |
log_error("sem_destroy(sem[%d]) error (%d)\n", i, errno);
|
| 596 |
}
|
| 597 |
}
|
| 598 |
#endif
|
| 599 |
|
| 600 |
detach_section_list_shm();
|
| 601 |
|
| 602 |
if (shm_unlink(section_list_shm_name) == -1 && errno != ENOENT)
|
| 603 |
{
|
| 604 |
log_error("shm_unlink(%s) error (%d)\n", section_list_shm_name, errno);
|
| 605 |
}
|
| 606 |
}
|
| 607 |
|
| 608 |
int set_section_list_shm_readonly(void)
|
| 609 |
{
|
| 610 |
if (p_section_list_pool == NULL)
|
| 611 |
{
|
| 612 |
log_error("p_section_list_pool not initialized\n");
|
| 613 |
return -1;
|
| 614 |
}
|
| 615 |
|
| 616 |
if (p_section_list_pool != NULL &&
|
| 617 |
mprotect(p_section_list_pool, p_section_list_pool->shm_size, PROT_READ) < 0)
|
| 618 |
{
|
| 619 |
log_error("mprotect() error (%d)\n", errno);
|
| 620 |
return -2;
|
| 621 |
}
|
| 622 |
|
| 623 |
return 0;
|
| 624 |
}
|
| 625 |
|
| 626 |
int detach_section_list_shm(void)
|
| 627 |
{
|
| 628 |
if (p_section_list_pool != NULL && munmap(p_section_list_pool, p_section_list_pool->shm_size) < 0)
|
| 629 |
{
|
| 630 |
log_error("munmap() error (%d)\n", errno);
|
| 631 |
return -1;
|
| 632 |
}
|
| 633 |
|
| 634 |
p_section_list_pool = NULL;
|
| 635 |
|
| 636 |
return 0;
|
| 637 |
}
|
| 638 |
|
| 639 |
inline static void sid_to_str(int32_t sid, char *p_sid_str)
|
| 640 |
{
|
| 641 |
uint32_t u_sid;
|
| 642 |
int i;
|
| 643 |
|
| 644 |
u_sid = (uint32_t)sid;
|
| 645 |
for (i = 0; i < SID_STR_LEN - 1; i++)
|
| 646 |
{
|
| 647 |
p_sid_str[i] = (char)(u_sid % 255 + 1);
|
| 648 |
u_sid /= 255;
|
| 649 |
}
|
| 650 |
p_sid_str[i] = '\0';
|
| 651 |
}
|
| 652 |
|
| 653 |
SECTION_LIST *section_list_create(int32_t sid, const char *sname, const char *stitle, const char *master_list)
|
| 654 |
{
|
| 655 |
SECTION_LIST *p_section;
|
| 656 |
char sid_str[SID_STR_LEN];
|
| 657 |
|
| 658 |
if (p_section_list_pool == NULL)
|
| 659 |
{
|
| 660 |
log_error("session_list_pool not initialized\n");
|
| 661 |
return NULL;
|
| 662 |
}
|
| 663 |
|
| 664 |
if (p_section_list_pool->section_count >= BBS_max_section)
|
| 665 |
{
|
| 666 |
log_error("section_count reach limit %d >= %d\n", p_section_list_pool->section_count, BBS_max_section);
|
| 667 |
return NULL;
|
| 668 |
}
|
| 669 |
|
| 670 |
sid_to_str(sid, sid_str);
|
| 671 |
|
| 672 |
p_section = p_section_list_pool->sections + p_section_list_pool->section_count;
|
| 673 |
|
| 674 |
p_section->sid = sid;
|
| 675 |
p_section->ex_menu_tm = 0;
|
| 676 |
|
| 677 |
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1);
|
| 678 |
p_section->sname[sizeof(p_section->sname) - 1] = '\0';
|
| 679 |
|
| 680 |
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle) - 1);
|
| 681 |
p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
|
| 682 |
|
| 683 |
strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
|
| 684 |
p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
|
| 685 |
|
| 686 |
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, p_section_list_pool->section_count) != 1)
|
| 687 |
{
|
| 688 |
log_error("trie_dict_set(section, %s, %d) error\n", sname, p_section_list_pool->section_count);
|
| 689 |
return NULL;
|
| 690 |
}
|
| 691 |
|
| 692 |
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_sid, sid_str, p_section_list_pool->section_count) != 1)
|
| 693 |
{
|
| 694 |
log_error("trie_dict_set(section, %d, %d) error\n", sid, p_section_list_pool->section_count);
|
| 695 |
return NULL;
|
| 696 |
}
|
| 697 |
|
| 698 |
section_list_reset_articles(p_section);
|
| 699 |
|
| 700 |
p_section_list_pool->section_count++;
|
| 701 |
|
| 702 |
return p_section;
|
| 703 |
}
|
| 704 |
|
| 705 |
int section_list_update(SECTION_LIST *p_section, const char *sname, const char *stitle, const char *master_list)
|
| 706 |
{
|
| 707 |
int64_t index;
|
| 708 |
|
| 709 |
if (p_section == NULL || sname == NULL || stitle == NULL || master_list == NULL)
|
| 710 |
{
|
| 711 |
log_error("NULL pointer error\n");
|
| 712 |
return -1;
|
| 713 |
}
|
| 714 |
|
| 715 |
index = get_section_index(p_section);
|
| 716 |
|
| 717 |
strncpy(p_section->sname, sname, sizeof(p_section->sname) - 1);
|
| 718 |
p_section->sname[sizeof(p_section->sname) - 1] = '\0';
|
| 719 |
|
| 720 |
strncpy(p_section->stitle, stitle, sizeof(p_section->stitle) - 1);
|
| 721 |
p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
|
| 722 |
|
| 723 |
strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
|
| 724 |
p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
|
| 725 |
|
| 726 |
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, index) < 0)
|
| 727 |
{
|
| 728 |
log_error("trie_dict_set(section, %s, %d) error\n", sname, index);
|
| 729 |
return -2;
|
| 730 |
}
|
| 731 |
|
| 732 |
return 0;
|
| 733 |
}
|
| 734 |
|
| 735 |
void section_list_reset_articles(SECTION_LIST *p_section)
|
| 736 |
{
|
| 737 |
p_section->article_count = 0;
|
| 738 |
p_section->topic_count = 0;
|
| 739 |
p_section->visible_article_count = 0;
|
| 740 |
p_section->visible_topic_count = 0;
|
| 741 |
p_section->p_article_head = NULL;
|
| 742 |
p_section->p_article_tail = NULL;
|
| 743 |
|
| 744 |
p_section->page_count = 0;
|
| 745 |
p_section->last_page_visible_article_count = 0;
|
| 746 |
|
| 747 |
p_section->ontop_article_count = 0;
|
| 748 |
}
|
| 749 |
|
| 750 |
SECTION_LIST *section_list_find_by_name(const char *sname)
|
| 751 |
{
|
| 752 |
int64_t index;
|
| 753 |
int ret;
|
| 754 |
|
| 755 |
if (p_section_list_pool == NULL)
|
| 756 |
{
|
| 757 |
log_error("section_list not initialized\n");
|
| 758 |
return NULL;
|
| 759 |
}
|
| 760 |
|
| 761 |
ret = trie_dict_get(p_section_list_pool->p_trie_dict_section_by_name, sname, &index);
|
| 762 |
if (ret < 0)
|
| 763 |
{
|
| 764 |
log_error("trie_dict_get(section, %s) error\n", sname);
|
| 765 |
return NULL;
|
| 766 |
}
|
| 767 |
else if (ret == 0)
|
| 768 |
{
|
| 769 |
return NULL;
|
| 770 |
}
|
| 771 |
|
| 772 |
return (p_section_list_pool->sections + index);
|
| 773 |
}
|
| 774 |
|
| 775 |
SECTION_LIST *section_list_find_by_sid(int32_t sid)
|
| 776 |
{
|
| 777 |
int64_t index;
|
| 778 |
int ret;
|
| 779 |
char sid_str[SID_STR_LEN];
|
| 780 |
|
| 781 |
if (p_section_list_pool == NULL)
|
| 782 |
{
|
| 783 |
log_error("section_list not initialized\n");
|
| 784 |
return NULL;
|
| 785 |
}
|
| 786 |
|
| 787 |
sid_to_str(sid, sid_str);
|
| 788 |
|
| 789 |
ret = trie_dict_get(p_section_list_pool->p_trie_dict_section_by_sid, sid_str, &index);
|
| 790 |
if (ret < 0)
|
| 791 |
{
|
| 792 |
log_error("trie_dict_get(section, %d) error\n", sid);
|
| 793 |
return NULL;
|
| 794 |
}
|
| 795 |
else if (ret == 0)
|
| 796 |
{
|
| 797 |
return NULL;
|
| 798 |
}
|
| 799 |
|
| 800 |
return (p_section_list_pool->sections + index);
|
| 801 |
}
|
| 802 |
|
| 803 |
int section_list_append_article(SECTION_LIST *p_section, const ARTICLE *p_article_src)
|
| 804 |
{
|
| 805 |
ARTICLE_BLOCK *p_block;
|
| 806 |
int32_t last_aid = 0;
|
| 807 |
ARTICLE *p_article;
|
| 808 |
ARTICLE *p_topic_head;
|
| 809 |
ARTICLE *p_topic_tail;
|
| 810 |
|
| 811 |
if (p_section == NULL || p_article_src == NULL)
|
| 812 |
{
|
| 813 |
log_error("NULL pointer error\n");
|
| 814 |
return -1;
|
| 815 |
}
|
| 816 |
|
| 817 |
if (p_article_block_pool == NULL)
|
| 818 |
{
|
| 819 |
log_error("article_block_pool not initialized\n");
|
| 820 |
return -1;
|
| 821 |
}
|
| 822 |
|
| 823 |
if (p_section->sid != p_article_src->sid)
|
| 824 |
{
|
| 825 |
log_error("section_list_append_article() error: section sid %d != article sid %d\n", p_section->sid, p_article_src->sid);
|
| 826 |
return -2;
|
| 827 |
}
|
| 828 |
|
| 829 |
if (p_section->article_count >= BBS_article_limit_per_section)
|
| 830 |
{
|
| 831 |
log_error("section_list_append_article() error: article_count reach limit in section %d\n", p_section->sid);
|
| 832 |
return -2;
|
| 833 |
}
|
| 834 |
|
| 835 |
if (p_article_block_pool->block_count == 0 ||
|
| 836 |
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count >= BBS_article_count_per_block)
|
| 837 |
{
|
| 838 |
if ((p_block = pop_free_article_block()) == NULL)
|
| 839 |
{
|
| 840 |
log_error("pop_free_article_block() error\n");
|
| 841 |
return -2;
|
| 842 |
}
|
| 843 |
|
| 844 |
if (p_article_block_pool->block_count > 0)
|
| 845 |
{
|
| 846 |
last_aid = p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->articles[BBS_article_count_per_block - 1].aid;
|
| 847 |
}
|
| 848 |
|
| 849 |
p_article_block_pool->p_block[p_article_block_pool->block_count] = p_block;
|
| 850 |
p_article_block_pool->block_count++;
|
| 851 |
}
|
| 852 |
else
|
| 853 |
{
|
| 854 |
p_block = p_article_block_pool->p_block[p_article_block_pool->block_count - 1];
|
| 855 |
last_aid = p_block->articles[p_block->article_count - 1].aid;
|
| 856 |
}
|
| 857 |
|
| 858 |
// AID of articles should be strictly ascending
|
| 859 |
if (p_article_src->aid <= last_aid)
|
| 860 |
{
|
| 861 |
log_error("section_list_append_article(aid=%d) error: last_aid=%d\n", p_article_src->aid, last_aid);
|
| 862 |
return -3;
|
| 863 |
}
|
| 864 |
|
| 865 |
p_article = (p_block->articles + p_block->article_count);
|
| 866 |
p_block->article_count++;
|
| 867 |
p_section->article_count++;
|
| 868 |
|
| 869 |
// Copy article data
|
| 870 |
*p_article = *p_article_src;
|
| 871 |
|
| 872 |
if (p_article->visible)
|
| 873 |
{
|
| 874 |
p_section->visible_article_count++;
|
| 875 |
}
|
| 876 |
|
| 877 |
// Link appended article as tail node of topic bi-directional list
|
| 878 |
if (p_article->tid != 0)
|
| 879 |
{
|
| 880 |
p_topic_head = article_block_find_by_aid(p_article->tid);
|
| 881 |
if (p_topic_head == NULL)
|
| 882 |
{
|
| 883 |
log_error("search head of topic (aid=%d) error\n", p_article->tid);
|
| 884 |
return -4;
|
| 885 |
}
|
| 886 |
|
| 887 |
p_topic_tail = p_topic_head->p_topic_prior;
|
| 888 |
if (p_topic_tail == NULL)
|
| 889 |
{
|
| 890 |
log_error("tail of topic (aid=%d) is NULL\n", p_article->tid);
|
| 891 |
return -4;
|
| 892 |
}
|
| 893 |
}
|
| 894 |
else
|
| 895 |
{
|
| 896 |
p_section->topic_count++;
|
| 897 |
|
| 898 |
if (p_article->visible)
|
| 899 |
{
|
| 900 |
p_section->visible_topic_count++;
|
| 901 |
}
|
| 902 |
|
| 903 |
p_topic_head = p_article;
|
| 904 |
p_topic_tail = p_article;
|
| 905 |
}
|
| 906 |
|
| 907 |
p_article->p_topic_prior = p_topic_tail;
|
| 908 |
p_article->p_topic_next = p_topic_head;
|
| 909 |
p_topic_head->p_topic_prior = p_article;
|
| 910 |
p_topic_tail->p_topic_next = p_article;
|
| 911 |
|
| 912 |
// Link appended article as tail node of article bi-directional list
|
| 913 |
if (p_section->p_article_head == NULL)
|
| 914 |
{
|
| 915 |
p_section->p_article_head = p_article;
|
| 916 |
p_section->p_article_tail = p_article;
|
| 917 |
}
|
| 918 |
p_article->p_prior = p_section->p_article_tail;
|
| 919 |
p_article->p_next = p_section->p_article_head;
|
| 920 |
p_section->p_article_head->p_prior = p_article;
|
| 921 |
p_section->p_article_tail->p_next = p_article;
|
| 922 |
p_section->p_article_tail = p_article;
|
| 923 |
|
| 924 |
// Update page
|
| 925 |
if ((p_article->visible && p_section->last_page_visible_article_count == BBS_article_limit_per_page) ||
|
| 926 |
p_section->page_count == 0)
|
| 927 |
{
|
| 928 |
p_section->p_page_first_article[p_section->page_count] = p_article;
|
| 929 |
p_section->page_count++;
|
| 930 |
p_section->last_page_visible_article_count = 0;
|
| 931 |
}
|
| 932 |
|
| 933 |
if (p_article->visible)
|
| 934 |
{
|
| 935 |
p_section->last_page_visible_article_count++;
|
| 936 |
}
|
| 937 |
|
| 938 |
if (p_article->ontop && section_list_update_article_ontop(p_section, p_article) < 0)
|
| 939 |
{
|
| 940 |
log_error("section_list_update_article_ontop(sid=%d, aid=%d) error\n",
|
| 941 |
p_section->sid, p_article->aid);
|
| 942 |
return -5;
|
| 943 |
}
|
| 944 |
|
| 945 |
return 0;
|
| 946 |
}
|
| 947 |
|
| 948 |
int section_list_set_article_visible(SECTION_LIST *p_section, int32_t aid, int8_t visible)
|
| 949 |
{
|
| 950 |
ARTICLE *p_article;
|
| 951 |
ARTICLE *p_reply;
|
| 952 |
int affected_count = 0;
|
| 953 |
|
| 954 |
if (p_section == NULL)
|
| 955 |
{
|
| 956 |
log_error("NULL pointer error\n");
|
| 957 |
return -1;
|
| 958 |
}
|
| 959 |
|
| 960 |
p_article = article_block_find_by_aid(aid);
|
| 961 |
if (p_article == NULL)
|
| 962 |
{
|
| 963 |
return -1; // Not found
|
| 964 |
}
|
| 965 |
|
| 966 |
if (p_section->sid != p_article->sid)
|
| 967 |
{
|
| 968 |
log_error("Inconsistent section sid %d != article sid %d\n", p_section->sid, p_article->sid);
|
| 969 |
return -2;
|
| 970 |
}
|
| 971 |
|
| 972 |
if (p_article->visible == visible)
|
| 973 |
{
|
| 974 |
return 0; // Already set
|
| 975 |
}
|
| 976 |
|
| 977 |
if (visible == 0) // 1 -> 0
|
| 978 |
{
|
| 979 |
p_section->visible_article_count--;
|
| 980 |
|
| 981 |
if (user_article_cnt_inc(p_article->uid, -1) < 0)
|
| 982 |
{
|
| 983 |
log_error("user_article_cnt_inc(uid=%d, -1) error\n", p_article->uid);
|
| 984 |
}
|
| 985 |
|
| 986 |
if (p_article->tid == 0)
|
| 987 |
{
|
| 988 |
p_section->visible_topic_count--;
|
| 989 |
|
| 990 |
// Set related visible replies to invisible
|
| 991 |
for (p_reply = p_article->p_topic_next; p_reply->tid != 0; p_reply = p_reply->p_topic_next)
|
| 992 |
{
|
| 993 |
if (p_reply->tid != aid)
|
| 994 |
{
|
| 995 |
log_error("Inconsistent tid = %d found in reply %d of topic %d\n", p_reply->tid, p_reply->aid, aid);
|
| 996 |
continue;
|
| 997 |
}
|
| 998 |
|
| 999 |
if (p_reply->visible == 1)
|
| 1000 |
{
|
| 1001 |
p_reply->visible = 0;
|
| 1002 |
p_section->visible_article_count--;
|
| 1003 |
affected_count++;
|
| 1004 |
|
| 1005 |
if (user_article_cnt_inc(p_reply->uid, -1) < 0)
|
| 1006 |
{
|
| 1007 |
log_error("user_article_cnt_inc(uid=%d, -1) error\n", p_reply->uid);
|
| 1008 |
}
|
| 1009 |
}
|
| 1010 |
}
|
| 1011 |
}
|
| 1012 |
}
|
| 1013 |
else // 0 -> 1
|
| 1014 |
{
|
| 1015 |
p_section->visible_article_count++;
|
| 1016 |
|
| 1017 |
if (p_article->tid == 0)
|
| 1018 |
{
|
| 1019 |
p_section->visible_topic_count++;
|
| 1020 |
}
|
| 1021 |
|
| 1022 |
if (user_article_cnt_inc(p_article->uid, 1) < 0)
|
| 1023 |
{
|
| 1024 |
log_error("user_article_cnt_inc(uid=%d, 1) error\n", p_article->uid);
|
| 1025 |
}
|
| 1026 |
}
|
| 1027 |
|
| 1028 |
p_article->visible = visible;
|
| 1029 |
affected_count++;
|
| 1030 |
|
| 1031 |
return affected_count;
|
| 1032 |
}
|
| 1033 |
|
| 1034 |
int section_list_update_article_ontop(SECTION_LIST *p_section, ARTICLE *p_article)
|
| 1035 |
{
|
| 1036 |
int i;
|
| 1037 |
|
| 1038 |
if (p_section == NULL || p_article == NULL)
|
| 1039 |
{
|
| 1040 |
log_error("NULL pointer error\n");
|
| 1041 |
return -1;
|
| 1042 |
}
|
| 1043 |
|
| 1044 |
if (p_section->sid != p_article->sid)
|
| 1045 |
{
|
| 1046 |
log_error("Inconsistent section sid %d != article sid %d\n", p_section->sid, p_article->sid);
|
| 1047 |
return -2;
|
| 1048 |
}
|
| 1049 |
|
| 1050 |
if (p_article->ontop)
|
| 1051 |
{
|
| 1052 |
for (i = 0; i < p_section->ontop_article_count; i++)
|
| 1053 |
{
|
| 1054 |
if (p_section->p_ontop_articles[i]->aid == p_article->aid)
|
| 1055 |
{
|
| 1056 |
log_error("Inconsistent state found: article %d already ontop in section %d\n", p_article->aid, p_section->sid);
|
| 1057 |
return 0;
|
| 1058 |
}
|
| 1059 |
else if (p_section->p_ontop_articles[i]->aid > p_article->aid)
|
| 1060 |
{
|
| 1061 |
break;
|
| 1062 |
}
|
| 1063 |
}
|
| 1064 |
|
| 1065 |
// Remove the oldest one if the array of ontop articles is full
|
| 1066 |
if (p_section->ontop_article_count >= BBS_ontop_article_limit_per_section)
|
| 1067 |
{
|
| 1068 |
if (i == 0) // p_article is the oldest one
|
| 1069 |
{
|
| 1070 |
return 0;
|
| 1071 |
}
|
| 1072 |
memmove((void *)(p_section->p_ontop_articles),
|
| 1073 |
(void *)(p_section->p_ontop_articles + 1),
|
| 1074 |
sizeof(ARTICLE *) * (size_t)(i - 1));
|
| 1075 |
p_section->ontop_article_count--;
|
| 1076 |
i--;
|
| 1077 |
}
|
| 1078 |
else
|
| 1079 |
{
|
| 1080 |
memmove((void *)(p_section->p_ontop_articles + i + 1),
|
| 1081 |
(void *)(p_section->p_ontop_articles + i),
|
| 1082 |
sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i));
|
| 1083 |
}
|
| 1084 |
|
| 1085 |
p_section->p_ontop_articles[i] = p_article;
|
| 1086 |
p_section->ontop_article_count++;
|
| 1087 |
|
| 1088 |
// TODO: debug
|
| 1089 |
}
|
| 1090 |
else // ontop == 0
|
| 1091 |
{
|
| 1092 |
for (i = 0; i < p_section->ontop_article_count; i++)
|
| 1093 |
{
|
| 1094 |
if (p_section->p_ontop_articles[i]->aid == p_article->aid)
|
| 1095 |
{
|
| 1096 |
break;
|
| 1097 |
}
|
| 1098 |
}
|
| 1099 |
if (i == p_section->ontop_article_count) // not found
|
| 1100 |
{
|
| 1101 |
log_error("Inconsistent state found: article %d not ontop in section %d\n", p_article->aid, p_section->sid);
|
| 1102 |
return 0;
|
| 1103 |
}
|
| 1104 |
|
| 1105 |
memmove((void *)(p_section->p_ontop_articles + i),
|
| 1106 |
(void *)(p_section->p_ontop_articles + i + 1),
|
| 1107 |
sizeof(ARTICLE *) * (size_t)(p_section->ontop_article_count - i - 1));
|
| 1108 |
p_section->ontop_article_count--;
|
| 1109 |
}
|
| 1110 |
|
| 1111 |
return 0;
|
| 1112 |
}
|
| 1113 |
|
| 1114 |
int section_list_page_count_with_ontop(SECTION_LIST *p_section)
|
| 1115 |
{
|
| 1116 |
int page_count;
|
| 1117 |
|
| 1118 |
if (p_section == NULL)
|
| 1119 |
{
|
| 1120 |
log_error("NULL pointer error\n");
|
| 1121 |
return -1;
|
| 1122 |
}
|
| 1123 |
|
| 1124 |
page_count = p_section->page_count - 1 +
|
| 1125 |
(p_section->last_page_visible_article_count + p_section->ontop_article_count + BBS_article_limit_per_page - 1) /
|
| 1126 |
BBS_article_limit_per_page;
|
| 1127 |
|
| 1128 |
if (page_count < 0)
|
| 1129 |
{
|
| 1130 |
page_count = 0;
|
| 1131 |
}
|
| 1132 |
|
| 1133 |
return page_count;
|
| 1134 |
}
|
| 1135 |
|
| 1136 |
int section_list_page_article_count_with_ontop(SECTION_LIST *p_section, int32_t page_id)
|
| 1137 |
{
|
| 1138 |
if (p_section == NULL)
|
| 1139 |
{
|
| 1140 |
log_error("NULL pointer error\n");
|
| 1141 |
return -1;
|
| 1142 |
}
|
| 1143 |
|
| 1144 |
if (page_id < p_section->page_count - 1)
|
| 1145 |
{
|
| 1146 |
return BBS_article_limit_per_page;
|
| 1147 |
}
|
| 1148 |
else // if (page_id >= p_section->page_count - 1)
|
| 1149 |
{
|
| 1150 |
return MIN(MAX(0,
|
| 1151 |
(p_section->last_page_visible_article_count + p_section->ontop_article_count -
|
| 1152 |
BBS_article_limit_per_page * (page_id - p_section->page_count + 1))),
|
| 1153 |
BBS_article_limit_per_page);
|
| 1154 |
}
|
| 1155 |
}
|
| 1156 |
|
| 1157 |
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)
|
| 1158 |
{
|
| 1159 |
ARTICLE *p_article;
|
| 1160 |
int left;
|
| 1161 |
int right;
|
| 1162 |
int mid;
|
| 1163 |
|
| 1164 |
*p_page = -1;
|
| 1165 |
*p_offset = -1;
|
| 1166 |
*pp_next = NULL;
|
| 1167 |
|
| 1168 |
if (p_section == NULL)
|
| 1169 |
{
|
| 1170 |
log_error("NULL pointer error\n");
|
| 1171 |
return NULL;
|
| 1172 |
}
|
| 1173 |
|
| 1174 |
if (p_section->article_count == 0) // empty
|
| 1175 |
{
|
| 1176 |
*p_page = 0;
|
| 1177 |
*p_offset = 0;
|
| 1178 |
return NULL;
|
| 1179 |
}
|
| 1180 |
|
| 1181 |
left = 0;
|
| 1182 |
right = p_section->page_count - 1;
|
| 1183 |
|
| 1184 |
// aid in the range [ head aid of pages[left], tail aid of pages[right] ]
|
| 1185 |
while (left < right)
|
| 1186 |
{
|
| 1187 |
// get page id no less than mid value of left page id and right page id
|
| 1188 |
mid = (left + right) / 2 + (left + right) % 2;
|
| 1189 |
|
| 1190 |
if (aid < p_section->p_page_first_article[mid]->aid)
|
| 1191 |
{
|
| 1192 |
right = mid - 1;
|
| 1193 |
}
|
| 1194 |
else // if (aid < p_section->p_page_first_article[mid]->aid)
|
| 1195 |
{
|
| 1196 |
left = mid;
|
| 1197 |
}
|
| 1198 |
}
|
| 1199 |
|
| 1200 |
*p_page = left;
|
| 1201 |
|
| 1202 |
p_article = p_section->p_page_first_article[*p_page];
|
| 1203 |
|
| 1204 |
// p_section->p_page_first_article[*p_page]->aid <= aid < p_section->p_page_first_article[*p_page + 1]->aid
|
| 1205 |
right = (*p_page == MAX(0, p_section->page_count - 1) ? INT32_MAX : p_section->p_page_first_article[*p_page + 1]->aid);
|
| 1206 |
|
| 1207 |
// left will be the offset of article found or offset to insert
|
| 1208 |
left = 0;
|
| 1209 |
|
| 1210 |
while (aid > p_article->aid)
|
| 1211 |
{
|
| 1212 |
p_article = p_article->p_next;
|
| 1213 |
left++;
|
| 1214 |
|
| 1215 |
if (aid == p_article->aid)
|
| 1216 |
{
|
| 1217 |
*pp_next = p_article->p_next;
|
| 1218 |
break;
|
| 1219 |
}
|
| 1220 |
|
| 1221 |
// over last article in the page
|
| 1222 |
if (p_article == p_section->p_article_head || p_article->aid >= right)
|
| 1223 |
{
|
| 1224 |
*pp_next = (p_article == p_section->p_article_head ? p_section->p_article_head : p_section->p_page_first_article[*p_page + 1]);
|
| 1225 |
*p_offset = left;
|
| 1226 |
return NULL; // not found
|
| 1227 |
}
|
| 1228 |
}
|
| 1229 |
|
| 1230 |
if (aid < p_article->aid)
|
| 1231 |
{
|
| 1232 |
*pp_next = p_article;
|
| 1233 |
p_article = NULL; // not found
|
| 1234 |
}
|
| 1235 |
else // aid == p_article->aid
|
| 1236 |
{
|
| 1237 |
*pp_next = p_article->p_next;
|
| 1238 |
}
|
| 1239 |
|
| 1240 |
*p_offset = left;
|
| 1241 |
|
| 1242 |
return p_article;
|
| 1243 |
}
|
| 1244 |
|
| 1245 |
int section_list_calculate_page(SECTION_LIST *p_section, int32_t start_aid)
|
| 1246 |
{
|
| 1247 |
ARTICLE *p_article;
|
| 1248 |
ARTICLE *p_next;
|
| 1249 |
int32_t page;
|
| 1250 |
int32_t offset;
|
| 1251 |
int visible_article_count;
|
| 1252 |
int page_head_set;
|
| 1253 |
|
| 1254 |
if (p_section == NULL)
|
| 1255 |
{
|
| 1256 |
log_error("NULL pointer error\n");
|
| 1257 |
return -1;
|
| 1258 |
}
|
| 1259 |
|
| 1260 |
if (p_section->article_count == 0) // empty
|
| 1261 |
{
|
| 1262 |
p_section->page_count = 0;
|
| 1263 |
p_section->last_page_visible_article_count = 0;
|
| 1264 |
|
| 1265 |
return 0;
|
| 1266 |
}
|
| 1267 |
|
| 1268 |
if (start_aid > 0)
|
| 1269 |
{
|
| 1270 |
p_article = article_block_find_by_aid(start_aid);
|
| 1271 |
if (p_article == NULL)
|
| 1272 |
{
|
| 1273 |
return -1; // Not found
|
| 1274 |
}
|
| 1275 |
|
| 1276 |
if (p_section->sid != p_article->sid)
|
| 1277 |
{
|
| 1278 |
log_error("section_list_calculate_page() error: section sid %d != start article sid %d\n", p_section->sid, p_article->sid);
|
| 1279 |
return -2;
|
| 1280 |
}
|
| 1281 |
|
| 1282 |
p_article = section_list_find_article_with_offset(p_section, start_aid, &page, &offset, &p_next);
|
| 1283 |
if (p_article == NULL)
|
| 1284 |
{
|
| 1285 |
if (page < 0)
|
| 1286 |
{
|
| 1287 |
return -1;
|
| 1288 |
}
|
| 1289 |
log_error("section_list_calculate_page() aid = %d not found in section sid = %d\n",
|
| 1290 |
start_aid, p_section->sid);
|
| 1291 |
return -2;
|
| 1292 |
}
|
| 1293 |
|
| 1294 |
if (offset > 0)
|
| 1295 |
{
|
| 1296 |
p_article = p_section->p_page_first_article[page];
|
| 1297 |
}
|
| 1298 |
}
|
| 1299 |
else
|
| 1300 |
{
|
| 1301 |
p_article = p_section->p_article_head;
|
| 1302 |
page = 0;
|
| 1303 |
offset = 0;
|
| 1304 |
}
|
| 1305 |
|
| 1306 |
visible_article_count = 0;
|
| 1307 |
page_head_set = 0;
|
| 1308 |
|
| 1309 |
do
|
| 1310 |
{
|
| 1311 |
if (!page_head_set && visible_article_count == 0)
|
| 1312 |
{
|
| 1313 |
p_section->p_page_first_article[page] = p_article;
|
| 1314 |
page_head_set = 1;
|
| 1315 |
}
|
| 1316 |
|
| 1317 |
if (p_article->visible)
|
| 1318 |
{
|
| 1319 |
visible_article_count++;
|
| 1320 |
}
|
| 1321 |
|
| 1322 |
p_article = p_article->p_next;
|
| 1323 |
|
| 1324 |
// skip remaining invisible articles
|
| 1325 |
while (p_article->visible == 0 && p_article != p_section->p_article_head)
|
| 1326 |
{
|
| 1327 |
p_article = p_article->p_next;
|
| 1328 |
}
|
| 1329 |
|
| 1330 |
if (visible_article_count >= BBS_article_limit_per_page && p_article != p_section->p_article_head)
|
| 1331 |
{
|
| 1332 |
page++;
|
| 1333 |
visible_article_count = 0;
|
| 1334 |
page_head_set = 0;
|
| 1335 |
|
| 1336 |
if (page >= BBS_article_limit_per_section / BBS_article_limit_per_page && p_article != p_section->p_article_head)
|
| 1337 |
{
|
| 1338 |
log_error("Count of page exceed limit in section %d\n", p_section->sid);
|
| 1339 |
break;
|
| 1340 |
}
|
| 1341 |
}
|
| 1342 |
} while (p_article != p_section->p_article_head);
|
| 1343 |
|
| 1344 |
p_section->page_count = page + (visible_article_count > 0 ? 1 : 0);
|
| 1345 |
p_section->last_page_visible_article_count = (visible_article_count > 0
|
| 1346 |
? visible_article_count
|
| 1347 |
: (page > 0 ? BBS_article_limit_per_page : 0));
|
| 1348 |
|
| 1349 |
return 0;
|
| 1350 |
}
|
| 1351 |
|
| 1352 |
int32_t article_block_last_aid(void)
|
| 1353 |
{
|
| 1354 |
ARTICLE_BLOCK *p_block = p_article_block_pool->p_block[p_article_block_pool->block_count - 1];
|
| 1355 |
int32_t last_aid = p_block->articles[p_block->article_count - 1].aid;
|
| 1356 |
|
| 1357 |
return last_aid;
|
| 1358 |
}
|
| 1359 |
|
| 1360 |
int article_block_article_count(void)
|
| 1361 |
{
|
| 1362 |
int ret;
|
| 1363 |
|
| 1364 |
if (p_article_block_pool == NULL || p_article_block_pool->block_count <= 0)
|
| 1365 |
{
|
| 1366 |
return -1;
|
| 1367 |
}
|
| 1368 |
|
| 1369 |
ret = (p_article_block_pool->block_count - 1) * BBS_article_count_per_block +
|
| 1370 |
p_article_block_pool->p_block[p_article_block_pool->block_count - 1]->article_count;
|
| 1371 |
|
| 1372 |
return ret;
|
| 1373 |
}
|
| 1374 |
|
| 1375 |
int article_count_of_topic(int32_t aid)
|
| 1376 |
{
|
| 1377 |
ARTICLE *p_article;
|
| 1378 |
int article_count;
|
| 1379 |
|
| 1380 |
p_article = article_block_find_by_aid(aid);
|
| 1381 |
if (p_article == NULL)
|
| 1382 |
{
|
| 1383 |
return 0; // Not found
|
| 1384 |
}
|
| 1385 |
|
| 1386 |
article_count = 0;
|
| 1387 |
|
| 1388 |
do
|
| 1389 |
{
|
| 1390 |
if (p_article->tid != 0 && p_article->tid != aid)
|
| 1391 |
{
|
| 1392 |
log_error("article_count_of_topic(%d) error: article %d not linked to the topic\n", aid, p_article->aid);
|
| 1393 |
break;
|
| 1394 |
}
|
| 1395 |
|
| 1396 |
article_count++;
|
| 1397 |
p_article = p_article->p_topic_next;
|
| 1398 |
} while (p_article->aid != aid);
|
| 1399 |
|
| 1400 |
return article_count;
|
| 1401 |
}
|
| 1402 |
|
| 1403 |
int section_list_move_topic(SECTION_LIST *p_section_src, SECTION_LIST *p_section_dest, int32_t aid)
|
| 1404 |
{
|
| 1405 |
ARTICLE *p_article;
|
| 1406 |
ARTICLE *p_next;
|
| 1407 |
int32_t page;
|
| 1408 |
int32_t offset;
|
| 1409 |
int32_t move_article_count;
|
| 1410 |
int32_t dest_article_count_old;
|
| 1411 |
int32_t last_unaffected_aid_src;
|
| 1412 |
int32_t first_inserted_aid_dest;
|
| 1413 |
int move_counter;
|
| 1414 |
|
| 1415 |
if (p_section_src == NULL || p_section_dest == NULL)
|
| 1416 |
{
|
| 1417 |
log_error("NULL pointer error\n");
|
| 1418 |
return -1;
|
| 1419 |
}
|
| 1420 |
|
| 1421 |
if (p_section_src->sid == p_section_dest->sid)
|
| 1422 |
{
|
| 1423 |
log_error("section_list_move_topic() src and dest section are the same\n");
|
| 1424 |
return -1;
|
| 1425 |
}
|
| 1426 |
|
| 1427 |
if ((p_article = article_block_find_by_aid(aid)) == NULL)
|
| 1428 |
{
|
| 1429 |
log_error("article_block_find_by_aid(aid = %d) error: article not found\n", aid);
|
| 1430 |
return -2;
|
| 1431 |
}
|
| 1432 |
|
| 1433 |
if (p_section_src->sid != p_article->sid)
|
| 1434 |
{
|
| 1435 |
log_error("section_list_move_topic() error: src section sid %d != article %d sid %d\n",
|
| 1436 |
p_section_src->sid, p_article->aid, p_article->sid);
|
| 1437 |
return -2;
|
| 1438 |
}
|
| 1439 |
|
| 1440 |
if (p_article->tid != 0)
|
| 1441 |
{
|
| 1442 |
log_error("section_list_move_topic(aid = %d) error: article is not head of topic, tid = %d\n", aid, p_article->tid);
|
| 1443 |
return -2;
|
| 1444 |
}
|
| 1445 |
|
| 1446 |
last_unaffected_aid_src = (p_article == p_section_src->p_article_head ? 0 : p_article->p_prior->aid);
|
| 1447 |
|
| 1448 |
move_article_count = article_count_of_topic(aid);
|
| 1449 |
if (move_article_count <= 0)
|
| 1450 |
{
|
| 1451 |
log_error("article_count_of_topic(aid = %d) <= 0\n", aid);
|
| 1452 |
return -2;
|
| 1453 |
}
|
| 1454 |
|
| 1455 |
if (p_section_dest->article_count + move_article_count > BBS_article_limit_per_section)
|
| 1456 |
{
|
| 1457 |
log_error("section_list_move_topic() error: article_count %d reach limit in section %d\n",
|
| 1458 |
p_section_dest->article_count + move_article_count, p_section_dest->sid);
|
| 1459 |
return -3;
|
| 1460 |
}
|
| 1461 |
|
| 1462 |
dest_article_count_old = p_section_dest->article_count;
|
| 1463 |
move_counter = 0;
|
| 1464 |
first_inserted_aid_dest = p_article->aid;
|
| 1465 |
|
| 1466 |
do
|
| 1467 |
{
|
| 1468 |
if (p_section_src->sid != p_article->sid)
|
| 1469 |
{
|
| 1470 |
log_error("section_list_move_topic() warning: src section sid %d != article %d sid %d\n",
|
| 1471 |
p_section_src->sid, p_article->aid, p_article->sid);
|
| 1472 |
p_article = p_article->p_topic_next;
|
| 1473 |
continue;
|
| 1474 |
}
|
| 1475 |
|
| 1476 |
// Remove from bi-directional article list of src section
|
| 1477 |
if (p_section_src->p_article_head == p_article)
|
| 1478 |
{
|
| 1479 |
p_section_src->p_article_head = p_article->p_next;
|
| 1480 |
}
|
| 1481 |
if (p_section_src->p_article_tail == p_article)
|
| 1482 |
{
|
| 1483 |
p_section_src->p_article_tail = p_article->p_prior;
|
| 1484 |
}
|
| 1485 |
if (p_section_src->p_article_head == p_article) // || p_section_src->p_article_tail == p_article
|
| 1486 |
{
|
| 1487 |
p_section_src->p_article_head = NULL;
|
| 1488 |
p_section_src->p_article_tail = NULL;
|
| 1489 |
}
|
| 1490 |
|
| 1491 |
p_article->p_prior->p_next = p_article->p_next;
|
| 1492 |
p_article->p_next->p_prior = p_article->p_prior;
|
| 1493 |
|
| 1494 |
// Update sid of article
|
| 1495 |
p_article->sid = p_section_dest->sid;
|
| 1496 |
|
| 1497 |
if (section_list_find_article_with_offset(p_section_dest, p_article->aid, &page, &offset, &p_next) != NULL)
|
| 1498 |
{
|
| 1499 |
log_error("section_list_move_topic() warning: article %d already in section %d\n", p_article->aid, p_section_dest->sid);
|
| 1500 |
p_article = p_article->p_topic_next;
|
| 1501 |
continue;
|
| 1502 |
}
|
| 1503 |
|
| 1504 |
// Insert into bi-directional article list of dest section
|
| 1505 |
if (p_next == NULL) // empty section
|
| 1506 |
{
|
| 1507 |
p_section_dest->p_article_head = p_article;
|
| 1508 |
p_section_dest->p_article_tail = p_article;
|
| 1509 |
p_article->p_prior = p_article;
|
| 1510 |
p_article->p_next = p_article;
|
| 1511 |
}
|
| 1512 |
else
|
| 1513 |
{
|
| 1514 |
if (p_section_dest->p_article_head == p_next)
|
| 1515 |
{
|
| 1516 |
if (p_article->aid < p_next->aid)
|
| 1517 |
{
|
| 1518 |
p_section_dest->p_article_head = p_article;
|
| 1519 |
}
|
| 1520 |
else // p_article->aid > p_next->aid
|
| 1521 |
{
|
| 1522 |
p_section_dest->p_article_tail = p_article;
|
| 1523 |
}
|
| 1524 |
}
|
| 1525 |
|
| 1526 |
p_article->p_prior = p_next->p_prior;
|
| 1527 |
p_article->p_next = p_next;
|
| 1528 |
p_next->p_prior->p_next = p_article;
|
| 1529 |
p_next->p_prior = p_article;
|
| 1530 |
}
|
| 1531 |
|
| 1532 |
// Update article / topic counter of src / desc section
|
| 1533 |
p_section_src->article_count--;
|
| 1534 |
p_section_dest->article_count++;
|
| 1535 |
if (p_article->tid == 0)
|
| 1536 |
{
|
| 1537 |
p_section_src->topic_count--;
|
| 1538 |
p_section_dest->topic_count++;
|
| 1539 |
}
|
| 1540 |
|
| 1541 |
// Update visible article / topic counter of src / desc section
|
| 1542 |
if (p_article->visible)
|
| 1543 |
{
|
| 1544 |
p_section_src->visible_article_count--;
|
| 1545 |
p_section_dest->visible_article_count++;
|
| 1546 |
if (p_article->tid == 0)
|
| 1547 |
{
|
| 1548 |
p_section_src->visible_topic_count--;
|
| 1549 |
p_section_dest->visible_topic_count++;
|
| 1550 |
}
|
| 1551 |
}
|
| 1552 |
|
| 1553 |
// Update page for empty dest section
|
| 1554 |
if (p_section_dest->article_count == 1)
|
| 1555 |
{
|
| 1556 |
p_section_dest->p_page_first_article[0] = p_article;
|
| 1557 |
p_section_dest->page_count = 1;
|
| 1558 |
p_section_dest->last_page_visible_article_count = (p_article->visible ? 1 : 0);
|
| 1559 |
}
|
| 1560 |
|
| 1561 |
p_article = p_article->p_topic_next;
|
| 1562 |
|
| 1563 |
move_counter++;
|
| 1564 |
if (move_counter % CALCULATE_PAGE_THRESHOLD == 0)
|
| 1565 |
{
|
| 1566 |
// Re-calculate pages of desc section
|
| 1567 |
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0)
|
| 1568 |
{
|
| 1569 |
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n",
|
| 1570 |
p_section_dest->sid, first_inserted_aid_dest);
|
| 1571 |
}
|
| 1572 |
|
| 1573 |
first_inserted_aid_dest = p_article->aid;
|
| 1574 |
}
|
| 1575 |
} while (p_article->aid != aid);
|
| 1576 |
|
| 1577 |
if (p_section_dest->article_count - dest_article_count_old != move_article_count)
|
| 1578 |
{
|
| 1579 |
log_error("section_list_move_topic() warning: count of moved articles %d != %d\n",
|
| 1580 |
p_section_dest->article_count - dest_article_count_old, move_article_count);
|
| 1581 |
}
|
| 1582 |
|
| 1583 |
// Re-calculate pages of src section
|
| 1584 |
if (section_list_calculate_page(p_section_src, last_unaffected_aid_src) < 0)
|
| 1585 |
{
|
| 1586 |
log_error("section_list_calculate_page(src section = %d, aid = %d) error at aid = %d\n",
|
| 1587 |
p_section_src->sid, last_unaffected_aid_src, aid);
|
| 1588 |
}
|
| 1589 |
|
| 1590 |
if (move_counter % CALCULATE_PAGE_THRESHOLD != 0)
|
| 1591 |
{
|
| 1592 |
// Re-calculate pages of desc section
|
| 1593 |
if (section_list_calculate_page(p_section_dest, first_inserted_aid_dest) < 0)
|
| 1594 |
{
|
| 1595 |
log_error("section_list_calculate_page(dest section = %d, aid = %d) error\n",
|
| 1596 |
p_section_dest->sid, first_inserted_aid_dest);
|
| 1597 |
}
|
| 1598 |
}
|
| 1599 |
|
| 1600 |
return move_article_count;
|
| 1601 |
}
|
| 1602 |
|
| 1603 |
int get_section_index(SECTION_LIST *p_section)
|
| 1604 |
{
|
| 1605 |
int index;
|
| 1606 |
|
| 1607 |
if (p_section_list_pool == NULL)
|
| 1608 |
{
|
| 1609 |
log_error("get_section_index() error: uninitialized\n");
|
| 1610 |
return -1;
|
| 1611 |
}
|
| 1612 |
|
| 1613 |
if (p_section == NULL)
|
| 1614 |
{
|
| 1615 |
index = BBS_max_section;
|
| 1616 |
}
|
| 1617 |
else
|
| 1618 |
{
|
| 1619 |
index = (int)(p_section - p_section_list_pool->sections);
|
| 1620 |
if (index < 0 || index >= BBS_max_section)
|
| 1621 |
{
|
| 1622 |
log_error("get_section_index(%d) error: index out of range\n", index);
|
| 1623 |
return -2;
|
| 1624 |
}
|
| 1625 |
}
|
| 1626 |
|
| 1627 |
return index;
|
| 1628 |
}
|
| 1629 |
|
| 1630 |
int get_section_info(SECTION_LIST *p_section, char *sname, char *stitle, char *master_list)
|
| 1631 |
{
|
| 1632 |
if (p_section == NULL)
|
| 1633 |
{
|
| 1634 |
log_error("NULL pointer error\n");
|
| 1635 |
return -1;
|
| 1636 |
}
|
| 1637 |
|
| 1638 |
if (section_list_rd_lock(p_section) < 0)
|
| 1639 |
{
|
| 1640 |
log_error("section_list_rd_lock(sid=%d) error\n", p_section->sid);
|
| 1641 |
return -2;
|
| 1642 |
}
|
| 1643 |
|
| 1644 |
if (sname != NULL)
|
| 1645 |
{
|
| 1646 |
memcpy(sname, p_section->sname, sizeof(p_section->sname));
|
| 1647 |
}
|
| 1648 |
if (stitle != NULL)
|
| 1649 |
{
|
| 1650 |
memcpy(stitle, p_section->stitle, sizeof(p_section->stitle));
|
| 1651 |
}
|
| 1652 |
if (master_list != NULL)
|
| 1653 |
{
|
| 1654 |
memcpy(master_list, p_section->master_list, sizeof(p_section->master_list));
|
| 1655 |
}
|
| 1656 |
|
| 1657 |
// release lock of section
|
| 1658 |
if (section_list_rd_unlock(p_section) < 0)
|
| 1659 |
{
|
| 1660 |
log_error("section_list_rd_unlock(sid=%d) error\n", p_section->sid);
|
| 1661 |
return -2;
|
| 1662 |
}
|
| 1663 |
|
| 1664 |
return 0;
|
| 1665 |
}
|
| 1666 |
|
| 1667 |
int section_list_try_rd_lock(SECTION_LIST *p_section, int wait_sec)
|
| 1668 |
{
|
| 1669 |
int index;
|
| 1670 |
#ifdef HAVE_SYSTEM_V
|
| 1671 |
struct sembuf sops[4];
|
| 1672 |
#endif
|
| 1673 |
struct timespec timeout;
|
| 1674 |
int ret = 0;
|
| 1675 |
|
| 1676 |
index = get_section_index(p_section);
|
| 1677 |
if (index < 0)
|
| 1678 |
{
|
| 1679 |
return -2;
|
| 1680 |
}
|
| 1681 |
|
| 1682 |
timeout.tv_sec = wait_sec;
|
| 1683 |
timeout.tv_nsec = 0;
|
| 1684 |
|
| 1685 |
#ifdef HAVE_SYSTEM_V
|
| 1686 |
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index
|
| 1687 |
sops[0].sem_op = 0; // wait until unlocked
|
| 1688 |
sops[0].sem_flg = 0;
|
| 1689 |
|
| 1690 |
sops[1].sem_num = (unsigned short)(index * 2); // r_sem of section index
|
| 1691 |
sops[1].sem_op = 1; // lock
|
| 1692 |
sops[1].sem_flg = SEM_UNDO; // undo on terminate
|
| 1693 |
|
| 1694 |
// Read lock on any specific section will also acquire single read lock on "all section"
|
| 1695 |
// so that write lock on all section only need to acquire single write on on "all section"
|
| 1696 |
// rather than to acquire multiple write locks on all the available sections.
|
| 1697 |
if (index != BBS_max_section)
|
| 1698 |
{
|
| 1699 |
sops[2].sem_num = BBS_max_section * 2 + 1; // w_sem of all section
|
| 1700 |
sops[2].sem_op = 0; // wait until unlocked
|
| 1701 |
sops[2].sem_flg = 0;
|
| 1702 |
|
| 1703 |
sops[3].sem_num = BBS_max_section * 2; // r_sem of all section
|
| 1704 |
sops[3].sem_op = 1; // lock
|
| 1705 |
sops[3].sem_flg = SEM_UNDO; // undo on terminate
|
| 1706 |
}
|
| 1707 |
|
| 1708 |
ret = semtimedop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 2 : 4), &timeout);
|
| 1709 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 1710 |
{
|
| 1711 |
log_error("semop(index = %d, lock read) error %d\n", index, errno);
|
| 1712 |
}
|
| 1713 |
#else
|
| 1714 |
if (sem_timedwait(&(p_section_list_pool->sem[index]), &timeout) == -1)
|
| 1715 |
{
|
| 1716 |
if (errno != ETIMEDOUT && errno != EAGAIN && errno != EINTR)
|
| 1717 |
{
|
| 1718 |
log_error("sem_timedwait(sem[%d]) error %d\n", index, errno);
|
| 1719 |
}
|
| 1720 |
return -1;
|
| 1721 |
}
|
| 1722 |
|
| 1723 |
if (index != BBS_max_section)
|
| 1724 |
{
|
| 1725 |
if (sem_timedwait(&(p_section_list_pool->sem[BBS_max_section]), &timeout) == -1)
|
| 1726 |
{
|
| 1727 |
if (errno != ETIMEDOUT && errno != EAGAIN && errno != EINTR)
|
| 1728 |
{
|
| 1729 |
log_error("sem_timedwait(sem[%d]) error %d\n", BBS_max_section, errno);
|
| 1730 |
}
|
| 1731 |
// release previously acquired lock
|
| 1732 |
if (sem_post(&(p_section_list_pool->sem[index])) == -1)
|
| 1733 |
{
|
| 1734 |
log_error("sem_post(sem[%d]) error %d\n", index, errno);
|
| 1735 |
}
|
| 1736 |
return -1;
|
| 1737 |
}
|
| 1738 |
}
|
| 1739 |
|
| 1740 |
if (p_section_list_pool->write_lock_count[index] == 0 &&
|
| 1741 |
(index != BBS_max_section && p_section_list_pool->write_lock_count[BBS_max_section] == 0))
|
| 1742 |
{
|
| 1743 |
p_section_list_pool->read_lock_count[index]++;
|
| 1744 |
if (index != BBS_max_section)
|
| 1745 |
{
|
| 1746 |
p_section_list_pool->read_lock_count[BBS_max_section]++;
|
| 1747 |
}
|
| 1748 |
}
|
| 1749 |
else
|
| 1750 |
{
|
| 1751 |
errno = EAGAIN;
|
| 1752 |
ret = -1;
|
| 1753 |
}
|
| 1754 |
|
| 1755 |
if (index != BBS_max_section)
|
| 1756 |
{
|
| 1757 |
// release lock on "all section"
|
| 1758 |
if (sem_post(&(p_section_list_pool->sem[BBS_max_section])) == -1)
|
| 1759 |
{
|
| 1760 |
log_error("sem_post(sem[%d]) error %d\n", BBS_max_section, errno);
|
| 1761 |
ret = -1;
|
| 1762 |
}
|
| 1763 |
}
|
| 1764 |
|
| 1765 |
if (sem_post(&(p_section_list_pool->sem[index])) == -1)
|
| 1766 |
{
|
| 1767 |
log_error("sem_post(sem[%d]) error %d\n", index, errno);
|
| 1768 |
return -1;
|
| 1769 |
}
|
| 1770 |
#endif
|
| 1771 |
|
| 1772 |
return ret;
|
| 1773 |
}
|
| 1774 |
|
| 1775 |
int section_list_try_rw_lock(SECTION_LIST *p_section, int wait_sec)
|
| 1776 |
{
|
| 1777 |
int index;
|
| 1778 |
#ifdef HAVE_SYSTEM_V
|
| 1779 |
struct sembuf sops[3];
|
| 1780 |
#endif
|
| 1781 |
struct timespec timeout;
|
| 1782 |
int ret = 0;
|
| 1783 |
|
| 1784 |
index = get_section_index(p_section);
|
| 1785 |
if (index < 0)
|
| 1786 |
{
|
| 1787 |
return -2;
|
| 1788 |
}
|
| 1789 |
|
| 1790 |
timeout.tv_sec = wait_sec;
|
| 1791 |
timeout.tv_nsec = 0;
|
| 1792 |
|
| 1793 |
#ifdef HAVE_SYSTEM_V
|
| 1794 |
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index
|
| 1795 |
sops[0].sem_op = 0; // wait until unlocked
|
| 1796 |
sops[0].sem_flg = 0;
|
| 1797 |
|
| 1798 |
sops[1].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index
|
| 1799 |
sops[1].sem_op = 1; // lock
|
| 1800 |
sops[1].sem_flg = SEM_UNDO; // undo on terminate
|
| 1801 |
|
| 1802 |
sops[2].sem_num = (unsigned short)(index * 2); // r_sem of section index
|
| 1803 |
sops[2].sem_op = 0; // wait until unlocked
|
| 1804 |
sops[2].sem_flg = 0;
|
| 1805 |
|
| 1806 |
ret = semtimedop(p_section_list_pool->semid, sops, 3, &timeout);
|
| 1807 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 1808 |
{
|
| 1809 |
log_error("semop(index = %d, lock write) error %d\n", index, errno);
|
| 1810 |
}
|
| 1811 |
#else
|
| 1812 |
if (sem_timedwait(&(p_section_list_pool->sem[index]), &timeout) == -1)
|
| 1813 |
{
|
| 1814 |
if (errno != ETIMEDOUT && errno != EAGAIN && errno != EINTR)
|
| 1815 |
{
|
| 1816 |
log_error("sem_timedwait(sem[%d]) error %d\n", index, errno);
|
| 1817 |
}
|
| 1818 |
return -1;
|
| 1819 |
}
|
| 1820 |
|
| 1821 |
if (p_section_list_pool->read_lock_count[index] == 0 && p_section_list_pool->write_lock_count[index] == 0)
|
| 1822 |
{
|
| 1823 |
p_section_list_pool->write_lock_count[index]++;
|
| 1824 |
}
|
| 1825 |
else
|
| 1826 |
{
|
| 1827 |
errno = EAGAIN;
|
| 1828 |
ret = -1;
|
| 1829 |
}
|
| 1830 |
|
| 1831 |
if (sem_post(&(p_section_list_pool->sem[index])) == -1)
|
| 1832 |
{
|
| 1833 |
log_error("sem_post(sem[%d]) error %d\n", index, errno);
|
| 1834 |
return -1;
|
| 1835 |
}
|
| 1836 |
#endif
|
| 1837 |
|
| 1838 |
return ret;
|
| 1839 |
}
|
| 1840 |
|
| 1841 |
int section_list_rd_unlock(SECTION_LIST *p_section)
|
| 1842 |
{
|
| 1843 |
int index;
|
| 1844 |
#ifdef HAVE_SYSTEM_V
|
| 1845 |
struct sembuf sops[2];
|
| 1846 |
#endif
|
| 1847 |
int ret = 0;
|
| 1848 |
|
| 1849 |
index = get_section_index(p_section);
|
| 1850 |
if (index < 0)
|
| 1851 |
{
|
| 1852 |
return -2;
|
| 1853 |
}
|
| 1854 |
|
| 1855 |
#ifdef HAVE_SYSTEM_V
|
| 1856 |
sops[0].sem_num = (unsigned short)(index * 2); // r_sem of section index
|
| 1857 |
sops[0].sem_op = -1; // unlock
|
| 1858 |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait
|
| 1859 |
|
| 1860 |
if (index != BBS_max_section)
|
| 1861 |
{
|
| 1862 |
sops[1].sem_num = BBS_max_section * 2; // r_sem of all section
|
| 1863 |
sops[1].sem_op = -1; // unlock
|
| 1864 |
sops[1].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait
|
| 1865 |
}
|
| 1866 |
|
| 1867 |
ret = semop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 1 : 2));
|
| 1868 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 1869 |
{
|
| 1870 |
log_error("semop(index = %d, unlock read) error %d\n", index, errno);
|
| 1871 |
}
|
| 1872 |
#else
|
| 1873 |
if (sem_wait(&(p_section_list_pool->sem[index])) == -1)
|
| 1874 |
{
|
| 1875 |
if (errno != ETIMEDOUT && errno != EAGAIN && errno != EINTR)
|
| 1876 |
{
|
| 1877 |
log_error("sem_wait(sem[%d]) error %d\n", index, errno);
|
| 1878 |
}
|
| 1879 |
return -1;
|
| 1880 |
}
|
| 1881 |
|
| 1882 |
if (index != BBS_max_section)
|
| 1883 |
{
|
| 1884 |
if (sem_wait(&(p_section_list_pool->sem[BBS_max_section])) == -1)
|
| 1885 |
{
|
| 1886 |
if (errno != ETIMEDOUT && errno != EAGAIN && errno != EINTR)
|
| 1887 |
{
|
| 1888 |
log_error("sem_wait(sem[%d]) error %d\n", BBS_max_section, errno);
|
| 1889 |
}
|
| 1890 |
// release previously acquired lock
|
| 1891 |
if (sem_post(&(p_section_list_pool->sem[index])) == -1)
|
| 1892 |
{
|
| 1893 |
log_error("sem_post(sem[%d]) error %d\n", index, errno);
|
| 1894 |
}
|
| 1895 |
return -1;
|
| 1896 |
}
|
| 1897 |
}
|
| 1898 |
|
| 1899 |
if (p_section_list_pool->read_lock_count[index] > 0)
|
| 1900 |
{
|
| 1901 |
p_section_list_pool->read_lock_count[index]--;
|
| 1902 |
}
|
| 1903 |
else
|
| 1904 |
{
|
| 1905 |
log_error("read_lock_count[%d] already 0\n", index);
|
| 1906 |
}
|
| 1907 |
|
| 1908 |
if (index != BBS_max_section && p_section_list_pool->read_lock_count[BBS_max_section] > 0)
|
| 1909 |
{
|
| 1910 |
p_section_list_pool->read_lock_count[BBS_max_section]--;
|
| 1911 |
}
|
| 1912 |
else
|
| 1913 |
{
|
| 1914 |
log_error("read_lock_count[%d] already 0\n", BBS_max_section);
|
| 1915 |
}
|
| 1916 |
|
| 1917 |
if (index != BBS_max_section)
|
| 1918 |
{
|
| 1919 |
// release lock on "all section"
|
| 1920 |
if (sem_post(&(p_section_list_pool->sem[BBS_max_section])) == -1)
|
| 1921 |
{
|
| 1922 |
log_error("sem_post(sem[%d]) error %d\n", BBS_max_section, errno);
|
| 1923 |
ret = -1;
|
| 1924 |
}
|
| 1925 |
}
|
| 1926 |
|
| 1927 |
if (sem_post(&(p_section_list_pool->sem[index])) == -1)
|
| 1928 |
{
|
| 1929 |
log_error("sem_post(sem[%d]) error %d\n", index, errno);
|
| 1930 |
return -1;
|
| 1931 |
}
|
| 1932 |
#endif
|
| 1933 |
|
| 1934 |
return ret;
|
| 1935 |
}
|
| 1936 |
|
| 1937 |
int section_list_rw_unlock(SECTION_LIST *p_section)
|
| 1938 |
{
|
| 1939 |
int index;
|
| 1940 |
#ifdef HAVE_SYSTEM_V
|
| 1941 |
struct sembuf sops[1];
|
| 1942 |
#endif
|
| 1943 |
int ret = 0;
|
| 1944 |
|
| 1945 |
index = get_section_index(p_section);
|
| 1946 |
if (index < 0)
|
| 1947 |
{
|
| 1948 |
return -2;
|
| 1949 |
}
|
| 1950 |
|
| 1951 |
#ifdef HAVE_SYSTEM_V
|
| 1952 |
sops[0].sem_num = (unsigned short)(index * 2 + 1); // w_sem of section index
|
| 1953 |
sops[0].sem_op = -1; // unlock
|
| 1954 |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait
|
| 1955 |
|
| 1956 |
ret = semop(p_section_list_pool->semid, sops, 1);
|
| 1957 |
if (ret == -1 && errno != EAGAIN && errno != EINTR)
|
| 1958 |
{
|
| 1959 |
log_error("semop(index = %d, unlock write) error %d\n", index, errno);
|
| 1960 |
}
|
| 1961 |
#else
|
| 1962 |
if (sem_wait(&(p_section_list_pool->sem[index])) == -1)
|
| 1963 |
{
|
| 1964 |
if (errno != ETIMEDOUT && errno != EAGAIN && errno != EINTR)
|
| 1965 |
{
|
| 1966 |
log_error("sem_wait(sem[%d]) error %d\n", index, errno);
|
| 1967 |
}
|
| 1968 |
return -1;
|
| 1969 |
}
|
| 1970 |
|
| 1971 |
if (p_section_list_pool->write_lock_count[index] > 0)
|
| 1972 |
{
|
| 1973 |
p_section_list_pool->write_lock_count[index]--;
|
| 1974 |
}
|
| 1975 |
else
|
| 1976 |
{
|
| 1977 |
log_error("write_lock_count[%d] already 0\n", index);
|
| 1978 |
}
|
| 1979 |
|
| 1980 |
if (sem_post(&(p_section_list_pool->sem[index])) == -1)
|
| 1981 |
{
|
| 1982 |
log_error("sem_post(sem[%d]) error %d\n", index, errno);
|
| 1983 |
return -1;
|
| 1984 |
}
|
| 1985 |
#endif
|
| 1986 |
|
| 1987 |
return ret;
|
| 1988 |
}
|
| 1989 |
|
| 1990 |
int section_list_rd_lock(SECTION_LIST *p_section)
|
| 1991 |
{
|
| 1992 |
int timer = 0;
|
| 1993 |
int sid = (p_section == NULL ? 0 : p_section->sid);
|
| 1994 |
int ret = -1;
|
| 1995 |
time_t tm_first_failure = 0;
|
| 1996 |
|
| 1997 |
while (!SYS_server_exit)
|
| 1998 |
{
|
| 1999 |
ret = section_list_try_rd_lock(p_section, SECTION_TRY_LOCK_WAIT_TIME);
|
| 2000 |
if (ret == 0) // success
|
| 2001 |
{
|
| 2002 |
break;
|
| 2003 |
}
|
| 2004 |
else if (errno == EAGAIN || errno == EINTR) // retry
|
| 2005 |
{
|
| 2006 |
// Dead lock detection
|
| 2007 |
if (tm_first_failure == 0)
|
| 2008 |
{
|
| 2009 |
time(&tm_first_failure);
|
| 2010 |
}
|
| 2011 |
|
| 2012 |
timer++;
|
| 2013 |
if (timer % SECTION_TRY_LOCK_TIMES == 0)
|
| 2014 |
{
|
| 2015 |
log_error("section_list_try_rd_lock() tried %d times on section %d\n", timer, sid);
|
| 2016 |
if (time(NULL) - tm_first_failure >= SECTION_DEAD_LOCK_TIMEOUT)
|
| 2017 |
{
|
| 2018 |
log_error("Unable to acquire rd_lock for %d seconds\n", time(NULL) - tm_first_failure);
|
| 2019 |
#ifndef HAVE_SYSTEM_V
|
| 2020 |
section_list_reset_lock(p_section);
|
| 2021 |
log_error("Reset POSIX semaphore to resolve dead lock\n");
|
| 2022 |
#endif
|
| 2023 |
break;
|
| 2024 |
}
|
| 2025 |
}
|
| 2026 |
usleep(100 * 1000); // 0.1 second
|
| 2027 |
}
|
| 2028 |
else // failed
|
| 2029 |
{
|
| 2030 |
log_error("section_list_try_rd_lock() failed on section %d\n", sid);
|
| 2031 |
break;
|
| 2032 |
}
|
| 2033 |
}
|
| 2034 |
|
| 2035 |
return ret;
|
| 2036 |
}
|
| 2037 |
|
| 2038 |
int section_list_rw_lock(SECTION_LIST *p_section)
|
| 2039 |
{
|
| 2040 |
int timer = 0;
|
| 2041 |
int sid = (p_section == NULL ? 0 : p_section->sid);
|
| 2042 |
int ret = -1;
|
| 2043 |
time_t tm_first_failure = 0;
|
| 2044 |
|
| 2045 |
while (!SYS_server_exit)
|
| 2046 |
{
|
| 2047 |
ret = section_list_try_rw_lock(p_section, SECTION_TRY_LOCK_WAIT_TIME);
|
| 2048 |
if (ret == 0) // success
|
| 2049 |
{
|
| 2050 |
break;
|
| 2051 |
}
|
| 2052 |
else if (errno == EAGAIN || errno == EINTR) // retry
|
| 2053 |
{
|
| 2054 |
// Dead lock detection
|
| 2055 |
if (tm_first_failure == 0)
|
| 2056 |
{
|
| 2057 |
time(&tm_first_failure);
|
| 2058 |
}
|
| 2059 |
|
| 2060 |
timer++;
|
| 2061 |
if (timer % SECTION_TRY_LOCK_TIMES == 0)
|
| 2062 |
{
|
| 2063 |
log_error("section_list_try_rw_lock() tried %d times on section %d\n", timer, sid);
|
| 2064 |
if (time(NULL) - tm_first_failure >= SECTION_DEAD_LOCK_TIMEOUT)
|
| 2065 |
{
|
| 2066 |
log_error("Unable to acquire rw_lock for %d seconds\n", time(NULL) - tm_first_failure);
|
| 2067 |
#ifndef HAVE_SYSTEM_V
|
| 2068 |
section_list_reset_lock(p_section);
|
| 2069 |
log_error("Reset POSIX semaphore to resolve dead lock\n");
|
| 2070 |
#endif
|
| 2071 |
break;
|
| 2072 |
}
|
| 2073 |
}
|
| 2074 |
usleep(100 * 1000); // 0.1 second
|
| 2075 |
}
|
| 2076 |
else // failed
|
| 2077 |
{
|
| 2078 |
log_error("section_list_try_rw_lock() failed on section %d\n", sid);
|
| 2079 |
break;
|
| 2080 |
}
|
| 2081 |
}
|
| 2082 |
|
| 2083 |
return ret;
|
| 2084 |
}
|
| 2085 |
|
| 2086 |
#ifndef HAVE_SYSTEM_V
|
| 2087 |
int section_list_reset_lock(SECTION_LIST *p_section)
|
| 2088 |
{
|
| 2089 |
int index;
|
| 2090 |
|
| 2091 |
if (p_section == NULL)
|
| 2092 |
{
|
| 2093 |
log_error("NULL pointer error\n");
|
| 2094 |
return -1;
|
| 2095 |
}
|
| 2096 |
|
| 2097 |
index = get_section_index(p_section);
|
| 2098 |
if (index < 0)
|
| 2099 |
{
|
| 2100 |
return -2;
|
| 2101 |
}
|
| 2102 |
|
| 2103 |
if (sem_destroy(&(p_section_list_pool->sem[index])) == -1)
|
| 2104 |
{
|
| 2105 |
log_error("sem_destroy(sem[%d]) error (%d)\n", index, errno);
|
| 2106 |
}
|
| 2107 |
|
| 2108 |
p_section_list_pool->read_lock_count[index] = 0;
|
| 2109 |
p_section_list_pool->write_lock_count[index] = 0;
|
| 2110 |
|
| 2111 |
if (sem_init(&(p_section_list_pool->sem[index]), 1, 1) == -1)
|
| 2112 |
{
|
| 2113 |
log_error("sem_init(sem[%d]) error (%d)\n", index, errno);
|
| 2114 |
}
|
| 2115 |
|
| 2116 |
if (index != BBS_max_section)
|
| 2117 |
{
|
| 2118 |
if (sem_destroy(&(p_section_list_pool->sem[BBS_max_section])) == -1)
|
| 2119 |
{
|
| 2120 |
log_error("sem_destroy(sem[%d]) error (%d)\n", BBS_max_section, errno);
|
| 2121 |
}
|
| 2122 |
|
| 2123 |
p_section_list_pool->read_lock_count[BBS_max_section] = 0;
|
| 2124 |
p_section_list_pool->write_lock_count[BBS_max_section] = 0;
|
| 2125 |
|
| 2126 |
if (sem_init(&(p_section_list_pool->sem[BBS_max_section]), 1, 1) == -1)
|
| 2127 |
{
|
| 2128 |
log_error("sem_init(sem[%d]) error (%d)\n", BBS_max_section, errno);
|
| 2129 |
}
|
| 2130 |
}
|
| 2131 |
|
| 2132 |
return 0;
|
| 2133 |
}
|
| 2134 |
#endif
|
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