/[LeafOK_CVS]/lbbs/src/file_loader.c
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Diff of /lbbs/src/file_loader.c

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Revision 1.7 by sysadm, Sun May 18 07:41:34 2025 UTC Revision 1.11 by sysadm, Sun May 25 06:48:31 2025 UTC
# Line 31  Line 31 
31    
32  #define MAX_SPLIT_FILE_LINES 65536  #define MAX_SPLIT_FILE_LINES 65536
33    
34    struct shm_header_t
35    {
36            int shmid;
37            size_t data_len;
38            long line_total;
39    };
40    
41  static TRIE_NODE *p_trie_file_dict = NULL;  static TRIE_NODE *p_trie_file_dict = NULL;
42    
43  int file_loader_init()  int file_loader_init()
# Line 53  int file_loader_init() Line 60  int file_loader_init()
60    
61  static void trie_file_dict_cleanup_cb(const char *filename, int64_t value)  static void trie_file_dict_cleanup_cb(const char *filename, int64_t value)
62  {  {
63          const void *p_shm = (const void *)value;          int shmid = (int)value;
         int shmid = *((int *)p_shm);  
   
         if (shmdt(p_shm) == -1)  
         {  
                 log_error("shmdt(shmid=%d) error (%d)\n", shmid, errno);  
         }  
64    
65          if (shmctl(shmid, IPC_RMID, NULL) == -1)          if (shmctl(shmid, IPC_RMID, NULL) == -1)
66          {          {
# Line 75  void file_loader_cleanup(void) Line 76  void file_loader_cleanup(void)
76          }          }
77    
78          trie_dict_traverse(p_trie_file_dict, trie_file_dict_cleanup_cb);          trie_dict_traverse(p_trie_file_dict, trie_file_dict_cleanup_cb);
   
79          trie_dict_destroy(p_trie_file_dict);          trie_dict_destroy(p_trie_file_dict);
80    
81          p_trie_file_dict = NULL;          p_trie_file_dict = NULL;
82  }  }
83    
84  int load_file_shm(const char *filename)  int load_file(const char *filename)
85  {  {
86          int fd;          int fd;
87          struct stat sb;          struct stat sb;
# Line 95  int load_file_shm(const char *filename) Line 96  int load_file_shm(const char *filename)
96          long line_offsets[MAX_SPLIT_FILE_LINES];          long line_offsets[MAX_SPLIT_FILE_LINES];
97          long *p_line_offsets;          long *p_line_offsets;
98          int64_t shmid_old;          int64_t shmid_old;
         void *p_shm_old;  
99    
100          if ((fd = open(filename, O_RDONLY)) < 0)          if ((fd = open(filename, O_RDONLY)) < 0)
101          {          {
# Line 138  int load_file_shm(const char *filename) Line 138  int load_file_shm(const char *filename)
138                  return -2;                  return -2;
139          }          }
140    
141          size = sizeof(shmid) + sizeof(data_len) + sizeof(line_total) + data_len + 1 + sizeof(long) * (size_t)(line_total + 1);          size = sizeof(struct shm_header_t) + data_len + 1 + sizeof(long) * (size_t)(line_total + 1);
142          shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600);          shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600);
143          if (shmid == -1)          if (shmid == -1)
144          {          {
# Line 152  int load_file_shm(const char *filename) Line 152  int load_file_shm(const char *filename)
152                  return -3;                  return -3;
153          }          }
154    
155          *((int *)p_shm) = shmid;          ((struct shm_header_t *)p_shm)->shmid = shmid;
156          *((size_t *)(p_shm + sizeof(shmid))) = data_len;          ((struct shm_header_t *)p_shm)->data_len = data_len;
157          *((long *)(p_shm + sizeof(shmid) + sizeof(data_len))) = line_total;          ((struct shm_header_t *)p_shm)->line_total = line_total;
158          memcpy(p_shm + sizeof(shmid) + sizeof(data_len) + sizeof(line_total), p_data, data_len);          memcpy(p_shm + sizeof(struct shm_header_t), p_data, data_len);
159    
160          if (munmap(p_data, data_len) < 0)          if (munmap(p_data, data_len) < 0)
161          {          {
# Line 163  int load_file_shm(const char *filename) Line 163  int load_file_shm(const char *filename)
163                  return -2;                  return -2;
164          }          }
165    
166          p_data = p_shm + sizeof(int) + sizeof(data_len) + sizeof(line_total);          p_data = p_shm + sizeof(struct shm_header_t);
167          p_line_offsets = p_data + data_len + 1;          p_line_offsets = p_data + data_len + 1;
168          memcpy(p_line_offsets, line_offsets, sizeof(long) * (size_t)(line_total + 1));          memcpy(p_line_offsets, line_offsets, sizeof(long) * (size_t)(line_total + 1));
169    
170          if (trie_dict_get(p_trie_file_dict, filename, (int64_t *)&p_shm_old) == 1)          if (shmdt(p_shm) == -1)
171          {          {
172                  shmid_old = *((int *)p_shm_old);                  log_error("shmdt(shmid=%d) error (%d)\n", shmid, errno);
173                    return -3;
174                  if (shmdt(p_shm_old) == -1)          }
                 {  
                         log_error("shmdt(shmid=%d) error (%d)\n", shmid_old, errno);  
                         return -3;  
                 }  
175    
176            if (trie_dict_get(p_trie_file_dict, filename, &shmid_old) == 1)
177            {
178                  if (shmctl((int)shmid_old, IPC_RMID, NULL) == -1)                  if (shmctl((int)shmid_old, IPC_RMID, NULL) == -1)
179                  {                  {
180                          log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", (int)shmid_old, errno);                          log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", (int)shmid_old, errno);
# Line 184  int load_file_shm(const char *filename) Line 182  int load_file_shm(const char *filename)
182                  }                  }
183          }          }
184    
185          if (trie_dict_set(p_trie_file_dict, filename, (int64_t)p_shm) != 1)          if (trie_dict_set(p_trie_file_dict, filename, (int64_t)shmid) != 1)
186          {          {
187                  log_error("trie_dict_set(%s) error\n", filename);                  log_error("trie_dict_set(%s) error\n", filename);
188    
# Line 199  int load_file_shm(const char *filename) Line 197  int load_file_shm(const char *filename)
197          return 0;          return 0;
198  }  }
199    
200  int unload_file_shm(const char *filename)  int unload_file(const char *filename)
201  {  {
202          const void *p_shm;          int64_t shmid;
         int shmid;  
203    
204          if (trie_dict_get(p_trie_file_dict, filename, (int64_t *)&p_shm) != 1)          if (trie_dict_get(p_trie_file_dict, filename, &shmid) != 1)
205          {          {
206                  log_error("trie_dict_get(%s) not found\n", filename);                  log_error("trie_dict_get(%s) not found\n", filename);
207                  return -1;                  return -1;
208          }          }
209    
         shmid = *((int *)p_shm);  
   
         if (shmdt(p_shm) == -1)  
         {  
                 log_error("shmdt(shmid=%d) error (%d)\n", shmid, errno);  
         }  
   
210          if (shmctl((int)shmid, IPC_RMID, NULL) == -1)          if (shmctl((int)shmid, IPC_RMID, NULL) == -1)
211          {          {
212                  log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", (int)shmid, errno);                  log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", (int)shmid, errno);
# Line 231  int unload_file_shm(const char *filename Line 221  int unload_file_shm(const char *filename
221          return 0;          return 0;
222  }  }
223    
224  const void *get_file_shm(const char *filename, size_t *p_data_len, long *p_line_total, const void **pp_data, const long **pp_line_offsets)  const void *get_file_shm_readonly(const char *filename, size_t *p_data_len, long *p_line_total, const void **pp_data, const long **pp_line_offsets)
225  {  {
226            int64_t shmid;
227          const void *p_shm;          const void *p_shm;
228    
229          if (p_trie_file_dict == NULL)          if (p_trie_file_dict == NULL)
# Line 241  const void *get_file_shm(const char *fil Line 232  const void *get_file_shm(const char *fil
232                  return NULL;                  return NULL;
233          }          }
234    
235          if (trie_dict_get(p_trie_file_dict, filename, (int64_t *)&p_shm) != 1) // Not exist          if (trie_dict_get(p_trie_file_dict, filename, &shmid) != 1) // Not exist
236          {          {
237                  log_error("trie_dict_get(%s) not found\n", filename);                  log_error("trie_dict_get(%s) not found\n", filename);
238                  return NULL;                  return NULL;
239          }          }
240    
241          *p_data_len = *((size_t *)(p_shm + sizeof(int)));          p_shm = shmat((int)shmid, NULL, SHM_RDONLY);
242          *p_line_total = *((long *)(p_shm + sizeof(int) + sizeof(size_t)));          if (p_shm == (void *)-1)
243          *pp_data = p_shm + sizeof(int) + sizeof(size_t) + sizeof(long);          {
244                    log_error("shmat(shmid=%d) error (%d)\n", (int)shmid, errno);
245                    return NULL;
246            }
247    
248            *p_data_len = ((struct shm_header_t *)p_shm)->data_len;
249            *p_line_total = ((struct shm_header_t *)p_shm)->line_total;
250            *pp_data = p_shm + sizeof(struct shm_header_t);
251          *pp_line_offsets = *pp_data + *p_data_len + 1;          *pp_line_offsets = *pp_data + *p_data_len + 1;
252    
253          return p_shm;          return p_shm;
254  }  }
255    
256    int detach_file_shm(const void *p_shm)
257    {
258            if (p_shm == NULL)
259            {
260                    return -2;
261            }
262    
263            if (shmdt(p_shm) == -1)
264            {
265                    log_error("shmdt() error (%d)\n", errno);
266                    return -1;
267            }
268    
269            return 0;
270    }

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