git.m6w6.name Git - awesomized/libmemcached/blob - lib/memcached_storage.c

   1 /*
   2   Memcached library
   3
   4   memcached_set()
   5   memcached_replace()
   6   memcached_add()
   7
   8 */
   9
  10 #include "common.h"
  11 #include "memcached_io.h"
  12
  13 typedef enum {
  14   SET_OP,
  15   REPLACE_OP,
  16   ADD_OP,
  17   PREPEND_OP,
  18   APPEND_OP,
  19   CAS_OP,
  20 } memcached_storage_action;
  21
  22 /* Inline this */
  23 char *storage_op_string(memcached_storage_action verb)
  24 {
  25   switch (verb)
  26   {
  27   case SET_OP:
  28     return "set";
  29   case REPLACE_OP:
  30     return "replace";
  31   case ADD_OP:
  32     return "add";
  33   case PREPEND_OP:
  34     return "prepend";
  35   case APPEND_OP:
  36     return "append";
  37   case CAS_OP:
  38     return "cas";
  39   };
  40
  41   return SET_OP;
  42 }
  43
  44 static inline memcached_return memcached_send(memcached_st *ptr,
  45                                               char *master_key, size_t master_key_length,
  46                                               char *key, size_t key_length,
  47                                               char *value, size_t value_length,
  48                                               time_t expiration,
  49                                               uint32_t flags,
  50                                               uint64_t cas,
  51                                               memcached_storage_action verb)
  52 {
  53   char to_write;
  54   size_t write_length;
  55   ssize_t sent_length;
  56   memcached_return rc;
  57   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  58   unsigned int server_key;
  59
  60   WATCHPOINT_ASSERT(!(value == NULL && value_length > 0));
  61   WATCHPOINT_ASSERT(!(value && value_length == 0));
  62
  63   if (key_length == 0)
  64     return MEMCACHED_NO_KEY_PROVIDED;
  65
  66   if (ptr->number_of_hosts == 0)
  67     return MEMCACHED_NO_SERVERS;
  68
  69   server_key= memcached_generate_hash(ptr, master_key, master_key_length);
  70
  71   if (cas)
  72     write_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  73                            "%s %.*s %u %llu %zu %llu\r\n", storage_op_string(verb),
  74                            (int)key_length, key, flags,
  75                            (unsigned long long)expiration, value_length,
  76                            (unsigned long long)cas);
  77   else
  78     write_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  79                            "%s %.*s %u %llu %zu\r\n", storage_op_string(verb),
  80                            (int)key_length, key, flags,
  81                            (unsigned long long)expiration, value_length);
  82
  83   if (write_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
  84   {
  85     rc= MEMCACHED_WRITE_FAILURE;
  86     goto error;
  87   }
  88
  89   rc=  memcached_do(ptr, server_key, buffer, write_length, 0);
  90   if (rc != MEMCACHED_SUCCESS)
  91     goto error;
  92
  93   if ((sent_length= memcached_io_write(ptr, server_key, value, value_length, 0)) == -1)
  94   {
  95     rc= MEMCACHED_WRITE_FAILURE;
  96     goto error;
  97   }
  98
  99   if ((ptr->flags & MEM_NO_BLOCK) && verb == SET_OP)
 100     to_write= 0;
 101   else
 102     to_write= 1;
 103
 104   if ((sent_length= memcached_io_write(ptr, server_key, "\r\n", 2, to_write)) == -1)
 105   {
 106     rc= MEMCACHED_WRITE_FAILURE;
 107     goto error;
 108   }
 109
 110   if (to_write == 0)
 111   {
 112     rc= MEMCACHED_SUCCESS;
 113     memcached_server_response_increment(ptr, server_key);
 114   }
 115   else
 116   {
 117     rc= memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, server_key);
 118   }
 119   if (rc == MEMCACHED_STORED)
 120     return MEMCACHED_SUCCESS;
 121   else
 122     return rc;
 123
 124 error:
 125   memcached_io_reset(ptr, server_key);
 126
 127   return rc;
 128 }
 129
 130 memcached_return memcached_set(memcached_st *ptr, char *key, size_t key_length,
 131                                char *value, size_t value_length,
 132                                time_t expiration,
 133                                uint32_t flags)
 134 {
 135   memcached_return rc;
 136   LIBMEMCACHED_MEMCACHED_SET_START();
 137   rc= memcached_send(ptr, key, key_length,
 138                      key, key_length, value, value_length,
 139                      expiration, flags, 0, SET_OP);
 140   LIBMEMCACHED_MEMCACHED_SET_END();
 141   return rc;
 142 }
 143
 144 memcached_return memcached_add(memcached_st *ptr,
 145                                char *key, size_t key_length,
 146                                char *value, size_t value_length,
 147                                time_t expiration,
 148                                uint32_t flags)
 149 {
 150   memcached_return rc;
 151   LIBMEMCACHED_MEMCACHED_ADD_START();
 152   rc= memcached_send(ptr, key, key_length,
 153                      key, key_length, value, value_length,
 154                      expiration, flags, 0, ADD_OP);
 155   LIBMEMCACHED_MEMCACHED_ADD_END();
 156   return rc;
 157 }
 158
 159 memcached_return memcached_replace(memcached_st *ptr,
 160                                    char *key, size_t key_length,
 161                                    char *value, size_t value_length,
 162                                    time_t expiration,
 163                                    uint32_t flags)
 164 {
 165   memcached_return rc;
 166   LIBMEMCACHED_MEMCACHED_REPLACE_START();
 167   rc= memcached_send(ptr, key, key_length,
 168                      key, key_length, value, value_length,
 169                      expiration, flags, 0, REPLACE_OP);
 170   LIBMEMCACHED_MEMCACHED_REPLACE_END();
 171   return rc;
 172 }
 173
 174 memcached_return memcached_prepend(memcached_st *ptr,
 175                                    char *key, size_t key_length,
 176                                    char *value, size_t value_length,
 177                                    time_t expiration,
 178                                    uint32_t flags)
 179 {
 180   memcached_return rc;
 181   rc= memcached_send(ptr, key, key_length,
 182                      key, key_length, value, value_length,
 183                      expiration, flags, 0, PREPEND_OP);
 184   return rc;
 185 }
 186
 187 memcached_return memcached_append(memcached_st *ptr,
 188                                   char *key, size_t key_length,
 189                                   char *value, size_t value_length,
 190                                   time_t expiration,
 191                                   uint32_t flags)
 192 {
 193   memcached_return rc;
 194   rc= memcached_send(ptr, key, key_length,
 195                      key, key_length, value, value_length,
 196                      expiration, flags, 0, APPEND_OP);
 197   return rc;
 198 }
 199
 200 memcached_return memcached_cas(memcached_st *ptr,
 201                                char *key, size_t key_length,
 202                                char *value, size_t value_length,
 203                                time_t expiration,
 204                                uint32_t flags,
 205                                uint64_t cas)
 206 {
 207   memcached_return rc;
 208   rc= memcached_send(ptr, key, key_length,
 209                      key, key_length, value, value_length,
 210                      expiration, flags, cas, APPEND_OP);
 211   return rc;
 212 }
 213
 214 memcached_return memcached_set_by_key(memcached_st *ptr,
 215                                       char *master_key, size_t master_key_length,
 216                                       char *key, size_t key_length,
 217                                       char *value, size_t value_length,
 218                                       time_t expiration,
 219                                       uint32_t flags)
 220 {
 221   memcached_return rc;
 222   LIBMEMCACHED_MEMCACHED_SET_START();
 223   rc= memcached_send(ptr, key, key_length,
 224                      key, key_length, value, value_length,
 225                      expiration, flags, 0, SET_OP);
 226   LIBMEMCACHED_MEMCACHED_SET_END();
 227   return rc;
 228 }
 229
 230 memcached_return memcached_add_by_key(memcached_st *ptr,
 231                                       char *master_key, size_t master_key_length,
 232                                       char *key, size_t key_length,
 233                                       char *value, size_t value_length,
 234                                       time_t expiration,
 235                                       uint32_t flags)
 236 {
 237   memcached_return rc;
 238   LIBMEMCACHED_MEMCACHED_ADD_START();
 239   rc= memcached_send(ptr, key, key_length,
 240                      key, key_length, value, value_length,
 241                      expiration, flags, 0, ADD_OP);
 242   LIBMEMCACHED_MEMCACHED_ADD_END();
 243   return rc;
 244 }
 245
 246 memcached_return memcached_replace_by_key(memcached_st *ptr,
 247                                           char *master_key, size_t master_key_length,
 248                                           char *key, size_t key_length,
 249                                           char *value, size_t value_length,
 250                                           time_t expiration,
 251                                           uint32_t flags)
 252 {
 253   memcached_return rc;
 254   LIBMEMCACHED_MEMCACHED_REPLACE_START();
 255   rc= memcached_send(ptr, key, key_length,
 256                      key, key_length, value, value_length,
 257                      expiration, flags, 0, REPLACE_OP);
 258   LIBMEMCACHED_MEMCACHED_REPLACE_END();
 259   return rc;
 260 }
 261
 262 memcached_return memcached_prepend_by_key(memcached_st *ptr,
 263                                           char *master_key, size_t master_key_length,
 264                                           char *key, size_t key_length,
 265                                           char *value, size_t value_length,
 266                                           time_t expiration,
 267                                           uint32_t flags)
 268 {
 269   memcached_return rc;
 270   rc= memcached_send(ptr, key, key_length,
 271                      key, key_length, value, value_length,
 272                      expiration, flags, 0, PREPEND_OP);
 273   return rc;
 274 }
 275
 276 memcached_return memcached_append_by_key(memcached_st *ptr,
 277                                          char *master_key, size_t master_key_length,
 278                                          char *key, size_t key_length,
 279                                          char *value, size_t value_length,
 280                                          time_t expiration,
 281                                          uint32_t flags)
 282 {
 283   memcached_return rc;
 284   rc= memcached_send(ptr, key, key_length,
 285                      key, key_length, value, value_length,
 286                      expiration, flags, 0, APPEND_OP);
 287   return rc;
 288 }
 289
 290 memcached_return memcached_cas_by_key(memcached_st *ptr,
 291                                       char *master_key, size_t master_key_length,
 292                                       char *key, size_t key_length,
 293                                       char *value, size_t value_length,
 294                                       time_t expiration,
 295                                       uint32_t flags,
 296                                       uint64_t cas)
 297 {
 298   memcached_return rc;
 299   rc= memcached_send(ptr, key, key_length,
 300                      key, key_length, value, value_length,
 301                      expiration, flags, cas, APPEND_OP);
 302   return rc;
 303 }