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

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Revision 1.3 by sysadm, Sat May 17 05:54:42 2025 UTC Revision 1.13 by sysadm, Sun Jun 1 14:04:19 2025 UTC
# Line 29  Line 29 
29  #include <sys/shm.h>  #include <sys/shm.h>
30  #include <sys/ipc.h>  #include <sys/ipc.h>
31    
32  #define MAX_SPLIT_FILE_LINES 65536  struct shm_header_t
33    {
34            int shmid;
35            size_t data_len;
36            long line_total;
37    };
38    
39  static TRIE_NODE *p_trie_file_dict = NULL;  static TRIE_NODE *p_trie_file_dict = NULL;
40    
# Line 51  int file_loader_init() Line 56  int file_loader_init()
56          return 0;          return 0;
57  }  }
58    
59  static void trie_file_dict_cleanup_cb(const char *filename, int64_t shmid)  static void trie_file_dict_cleanup_cb(const char *filename, int64_t value)
60  {  {
61          log_std("Cleanup: %s %ld\n", filename, shmid);          int shmid = (int)value;
62          if (shmctl((int)shmid, IPC_RMID, NULL) == -1)  
63            if (shmctl(shmid, IPC_RMID, NULL) == -1)
64          {          {
65                  log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", (int)shmid, errno);                  log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", shmid, errno);
66          }          }
67  }  }
68    
# Line 69  void file_loader_cleanup(void) Line 75  void file_loader_cleanup(void)
75    
76          trie_dict_traverse(p_trie_file_dict, trie_file_dict_cleanup_cb);          trie_dict_traverse(p_trie_file_dict, trie_file_dict_cleanup_cb);
77          trie_dict_destroy(p_trie_file_dict);          trie_dict_destroy(p_trie_file_dict);
78    
79          p_trie_file_dict = NULL;          p_trie_file_dict = NULL;
80  }  }
81    
82  int load_file_shm(const char *filename)  int load_file(const char *filename)
83  {  {
84          int fd;          int fd;
85          struct stat sb;          struct stat sb;
# Line 82  int load_file_shm(const char *filename) Line 89  int load_file_shm(const char *filename)
89          key_t key;          key_t key;
90          size_t size;          size_t size;
91          int shmid;          int shmid;
         int64_t shmid_old;  
92          void *p_shm;          void *p_shm;
93          long line_total;          long line_total;
94          long line_offsets[MAX_SPLIT_FILE_LINES];          long line_offsets[MAX_SPLIT_FILE_LINES];
95          long *p_line_offsets;          long *p_line_offsets;
96            int64_t shmid_old;
97    
98          if ((fd = open(filename, O_RDONLY)) < 0)          if ((fd = open(filename, O_RDONLY)) < 0)
99          {          {
# Line 115  int load_file_shm(const char *filename) Line 122  int load_file_shm(const char *filename)
122          }          }
123    
124          line_total = split_data_lines(p_data, SCREEN_COLS, line_offsets, MAX_SPLIT_FILE_LINES);          line_total = split_data_lines(p_data, SCREEN_COLS, line_offsets, MAX_SPLIT_FILE_LINES);
         if (line_total >= MAX_SPLIT_FILE_LINES)  
         {  
                 log_error("split_data_lines() truncated over limit lines\n");  
         }  
125    
126          // Allocate shared memory          // Allocate shared memory
127          proj_id = (int)(time(NULL) % getpid());          proj_id = (int)(time(NULL) % getpid());
# Line 129  int load_file_shm(const char *filename) Line 132  int load_file_shm(const char *filename)
132                  return -2;                  return -2;
133          }          }
134    
135          size = 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);
136          shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600);          shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600);
137          if (shmid == -1)          if (shmid == -1)
138          {          {
# Line 139  int load_file_shm(const char *filename) Line 142  int load_file_shm(const char *filename)
142          p_shm = shmat(shmid, NULL, 0);          p_shm = shmat(shmid, NULL, 0);
143          if (p_shm == (void *)-1)          if (p_shm == (void *)-1)
144          {          {
145                  log_error("shmat() error (%d)\n", errno);                  log_error("shmat(shmid=%d) error (%d)\n", shmid, errno);
146                  return -3;                  return -3;
147          }          }
148    
149          *((size_t *)p_shm) = data_len;          ((struct shm_header_t *)p_shm)->shmid = shmid;
150          *((long *)(p_shm + sizeof(data_len))) = line_total;          ((struct shm_header_t *)p_shm)->data_len = data_len;
151          memcpy(p_shm + sizeof(data_len) + sizeof(line_total), p_data, data_len);          ((struct shm_header_t *)p_shm)->line_total = line_total;
152            memcpy(p_shm + sizeof(struct shm_header_t), p_data, data_len);
153    
154          if (munmap(p_data, data_len) < 0)          if (munmap(p_data, data_len) < 0)
155          {          {
# Line 153  int load_file_shm(const char *filename) Line 157  int load_file_shm(const char *filename)
157                  return -2;                  return -2;
158          }          }
159    
160          p_data = p_shm + sizeof(data_len) + sizeof(line_total);          p_data = p_shm + sizeof(struct shm_header_t);
161          p_line_offsets = p_data + data_len + 1;          p_line_offsets = p_data + data_len + 1;
162          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));
163    
164          if (shmdt(p_shm) == -1)          if (shmdt(p_shm) == -1)
165          {          {
166                  log_error("shmdt() error (%d)\n", errno);                  log_error("shmdt(shmid=%d) error (%d)\n", shmid, errno);
167                  return -3;                  return -3;
168          }          }
169    
# Line 187  int load_file_shm(const char *filename) Line 191  int load_file_shm(const char *filename)
191          return 0;          return 0;
192  }  }
193    
194  int unload_file_shm(const char *filename)  int unload_file(const char *filename)
195  {  {
196          int64_t shmid = 0;          int64_t shmid;
197    
198          if (trie_dict_get(p_trie_file_dict, filename, (int64_t *)&shmid) != 1)          if (trie_dict_get(p_trie_file_dict, filename, &shmid) != 1)
199          {          {
200                  log_error("trie_dict_get(%s) not found\n", filename);                  log_error("trie_dict_get(%s) not found\n", filename);
201                  return -1;                  return -1;
# Line 211  int unload_file_shm(const char *filename Line 215  int unload_file_shm(const char *filename
215          return 0;          return 0;
216  }  }
217    
218  const void *get_file_shm(const char *filename)  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)
219  {  {
220          int64_t shmid;          int64_t shmid;
221          const void *p_shm;          const void *p_shm;
# Line 231  const void *get_file_shm(const char *fil Line 235  const void *get_file_shm(const char *fil
235          p_shm = shmat((int)shmid, NULL, SHM_RDONLY);          p_shm = shmat((int)shmid, NULL, SHM_RDONLY);
236          if (p_shm == (void *)-1)          if (p_shm == (void *)-1)
237          {          {
238                  log_error("shmat() error (%d)\n", errno);                  log_error("shmat(shmid=%d) error (%d)\n", (int)shmid, errno);
239                  return NULL;                  return NULL;
240          }          }
241    
242            *p_data_len = ((struct shm_header_t *)p_shm)->data_len;
243            *p_line_total = ((struct shm_header_t *)p_shm)->line_total;
244            *pp_data = p_shm + sizeof(struct shm_header_t);
245            *pp_line_offsets = *pp_data + *p_data_len + 1;
246    
247          return p_shm;          return p_shm;
248  }  }
249    
250    int detach_file_shm(const void *p_shm)
251    {
252            if (p_shm == NULL)
253            {
254                    return -2;
255            }
256    
257            if (shmdt(p_shm) == -1)
258            {
259                    log_error("shmdt() error (%d)\n", errno);
260                    return -1;
261            }
262    
263            return 0;
264    }

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