git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/memcached.c

   1 /* LibMemcached
   2  * Copyright (C) 2006-2010 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary:
   9  *
  10  */
  11
  12 #include "common.h"
  13
  14 static const memcached_st global_copy= {
  15   .state= {
  16     .is_purging= false,
  17     .is_processing_input= false,
  18     .is_time_for_rebuild= false,
  19   },
  20   .flags= {
  21     .auto_eject_hosts= false,
  22     .binary_protocol= false,
  23     .buffer_requests= false,
  24     .cork= false,
  25     .hash_with_prefix_key= false,
  26     .ketama_weighted= false,
  27     .no_block= false,
  28     .no_reply= false,
  29     .randomize_replica_read= false,
  30     .reuse_memory= false,
  31     .support_cas= false,
  32     .tcp_nodelay= false,
  33     .use_cache_lookups= false,
  34     .use_sort_hosts= false,
  35     .use_udp= false,
  36     .verify_key= false,
  37     .tcp_keepalive= false,
  38     .ping_service= false
  39   }
  40 };
  41
  42 static inline bool _memcached_init(memcached_st *self)
  43 {
  44   self->state= global_copy.state;
  45   self->flags= global_copy.flags;
  46
  47   self->distribution= MEMCACHED_DISTRIBUTION_MODULA;
  48
  49   hashkit_st *hash_ptr;
  50   hash_ptr= hashkit_create(&self->hashkit);
  51   if (! hash_ptr)
  52     return false;
  53
  54   self->ketama.continuum_points_counter= 0;
  55
  56   self->number_of_hosts= 0;
  57   self->servers= NULL;
  58   self->last_disconnected_server= NULL;
  59
  60   self->snd_timeout= 0;
  61   self->rcv_timeout= 0;
  62   self->server_failure_limit= 0;
  63
  64   /* TODO, Document why we picked these defaults */
  65   self->io_msg_watermark= 500;
  66   self->io_bytes_watermark= 65 * 1024;
  67
  68   self->tcp_keepidle= 0;
  69
  70   self->io_key_prefetch= 0;
  71   self->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  72   self->connect_timeout= MEMCACHED_DEFAULT_CONNECT_TIMEOUT;
  73   self->retry_timeout= 0;
  74   self->ketama.continuum_count= 0;
  75
  76   self->send_size= -1;
  77   self->recv_size= -1;
  78
  79   self->user_data= NULL;
  80   self->ketama.next_distribution_rebuild= 0;
  81   self->number_of_replicas= 0;
  82   hash_ptr= hashkit_create(&self->distribution_hashkit);
  83   if (! hash_ptr)
  84     return false;
  85   self->ketama.continuum= NULL;
  86
  87   self->allocators= memcached_allocators_return_default();
  88
  89   self->on_clone= NULL;
  90   self->on_cleanup= NULL;
  91   self->get_key_failure= NULL;
  92   self->delete_trigger= NULL;
  93   self->callbacks= NULL;
  94   self->sasl.callbacks= NULL;
  95   self->sasl.is_allocated= false;
  96
  97   self->error_messages= NULL;
  98   self->prefix_key= NULL;
  99   self->configure.filename= NULL;
 100
 101   return true;
 102 }
 103
 104 static void _free(memcached_st *ptr, bool release_st)
 105 {
 106   /* If we have anything open, lets close it now */
 107   memcached_quit(ptr);
 108   memcached_server_list_free(memcached_server_list(ptr));
 109   memcached_result_free(&ptr->result);
 110
 111   if (ptr->last_disconnected_server)
 112     memcached_server_free(ptr->last_disconnected_server);
 113
 114   if (ptr->on_cleanup)
 115     ptr->on_cleanup(ptr);
 116
 117   if (ptr->ketama.continuum)
 118     libmemcached_free(ptr, ptr->ketama.continuum);
 119
 120   memcached_array_free(ptr->prefix_key);
 121   ptr->prefix_key= NULL;
 122
 123   memcached_error_free(ptr);
 124
 125   if (ptr->sasl.callbacks)
 126   {
 127 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 128     memcached_destroy_sasl_auth_data(ptr);
 129 #endif
 130   }
 131
 132   if (release_st)
 133   {
 134     memcached_array_free(ptr->configure.filename);
 135     ptr->configure.filename= NULL;
 136   }
 137
 138   if (memcached_is_allocated(ptr) && release_st)
 139   {
 140     libmemcached_free(ptr, ptr);
 141   }
 142 }
 143
 144 memcached_st *memcached_create(memcached_st *ptr)
 145 {
 146   if (ptr == NULL)
 147   {
 148     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 149
 150     if (! ptr)
 151     {
 152       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 153     }
 154
 155     ptr->options.is_allocated= true;
 156   }
 157   else
 158   {
 159     ptr->options.is_allocated= false;
 160   }
 161
 162 #if 0
 163   memcached_set_purging(ptr, false);
 164   memcached_set_processing_input(ptr, false);
 165 #endif
 166
 167   if (! _memcached_init(ptr))
 168   {
 169     memcached_free(ptr);
 170     return NULL;
 171   }
 172
 173   if (! memcached_result_create(ptr, &ptr->result))
 174   {
 175     memcached_free(ptr);
 176     return NULL;
 177   }
 178
 179   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 180
 181   return ptr;
 182 }
 183
 184 memcached_st *memcached_create_with_options(const char *string, size_t length)
 185 {
 186   memcached_st *self= memcached_create(NULL);
 187
 188   if (! self)
 189     return NULL;
 190
 191   memcached_return_t rc;
 192   if ((rc= memcached_parse_configuration(self, string, length)) != MEMCACHED_SUCCESS)
 193   {
 194     return self;
 195   }
 196
 197   if (memcached_parse_filename(self))
 198   {
 199     rc= memcached_parse_configure_file(self, memcached_parse_filename(self), memcached_parse_filename_length(self));
 200   }
 201
 202   return self;
 203 }
 204
 205 memcached_return_t memcached_reset(memcached_st *ptr)
 206 {
 207   WATCHPOINT_ASSERT(ptr);
 208   if (! ptr)
 209     return MEMCACHED_INVALID_ARGUMENTS;
 210
 211   bool stored_is_allocated= memcached_is_allocated(ptr);
 212   _free(ptr, false);
 213   memcached_create(ptr);
 214   memcached_set_allocated(ptr, stored_is_allocated);
 215
 216   if (ptr->configure.filename)
 217   {
 218     return memcached_parse_configure_file(ptr, memcached_param_array(ptr->configure.filename));
 219   }
 220
 221   return MEMCACHED_SUCCESS;
 222 }
 223
 224 void memcached_servers_reset(memcached_st *ptr)
 225 {
 226   memcached_server_list_free(memcached_server_list(ptr));
 227
 228   memcached_server_list_set(ptr, NULL);
 229   ptr->number_of_hosts= 0;
 230   if (ptr->last_disconnected_server)
 231   {
 232     memcached_server_free(ptr->last_disconnected_server);
 233   }
 234   ptr->last_disconnected_server= NULL;
 235   ptr->server_failure_limit= 0;
 236 }
 237
 238 void memcached_reset_last_disconnected_server(memcached_st *ptr)
 239 {
 240   if (ptr->last_disconnected_server)
 241   {
 242     memcached_server_free(ptr->last_disconnected_server);
 243     ptr->last_disconnected_server= NULL;
 244   }
 245 }
 246
 247 void memcached_free(memcached_st *ptr)
 248 {
 249   _free(ptr, true);
 250 }
 251
 252 /*
 253   clone is the destination, while source is the structure to clone.
 254   If source is NULL the call is the same as if a memcached_create() was
 255   called.
 256 */
 257 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 258 {
 259   memcached_return_t rc= MEMCACHED_SUCCESS;
 260   memcached_st *new_clone;
 261
 262   if (source == NULL)
 263     return memcached_create(clone);
 264
 265   if (clone && memcached_is_allocated(clone))
 266   {
 267     return NULL;
 268   }
 269
 270   new_clone= memcached_create(clone);
 271
 272   if (new_clone == NULL)
 273     return NULL;
 274
 275   new_clone->flags= source->flags;
 276   new_clone->send_size= source->send_size;
 277   new_clone->recv_size= source->recv_size;
 278   new_clone->poll_timeout= source->poll_timeout;
 279   new_clone->connect_timeout= source->connect_timeout;
 280   new_clone->retry_timeout= source->retry_timeout;
 281   new_clone->distribution= source->distribution;
 282
 283   hashkit_st *hash_ptr;
 284
 285   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 286   if (! hash_ptr)
 287   {
 288     memcached_free(new_clone);
 289     return NULL;
 290   }
 291
 292   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 293   if (! hash_ptr)
 294   {
 295     memcached_free(new_clone);
 296     return NULL;
 297   }
 298
 299   new_clone->user_data= source->user_data;
 300
 301   new_clone->snd_timeout= source->snd_timeout;
 302   new_clone->rcv_timeout= source->rcv_timeout;
 303
 304   new_clone->on_clone= source->on_clone;
 305   new_clone->on_cleanup= source->on_cleanup;
 306
 307   new_clone->allocators= source->allocators;
 308
 309   new_clone->get_key_failure= source->get_key_failure;
 310   new_clone->delete_trigger= source->delete_trigger;
 311   new_clone->server_failure_limit= source->server_failure_limit;
 312   new_clone->io_msg_watermark= source->io_msg_watermark;
 313   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 314   new_clone->io_key_prefetch= source->io_key_prefetch;
 315   new_clone->number_of_replicas= source->number_of_replicas;
 316   new_clone->tcp_keepidle= source->tcp_keepidle;
 317
 318   if (memcached_server_count(source))
 319     rc= memcached_push(new_clone, source);
 320
 321   if (rc != MEMCACHED_SUCCESS)
 322   {
 323     memcached_free(new_clone);
 324
 325     return NULL;
 326   }
 327
 328
 329   new_clone->prefix_key= memcached_array_clone(new_clone, source->prefix_key);
 330
 331 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 332   if (source->sasl.callbacks)
 333   {
 334     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 335     {
 336       memcached_free(new_clone);
 337       return NULL;
 338     }
 339   }
 340 #endif
 341
 342   rc= run_distribution(new_clone);
 343
 344   if (rc != MEMCACHED_SUCCESS)
 345   {
 346     memcached_free(new_clone);
 347
 348     return NULL;
 349   }
 350
 351   if (source->on_clone)
 352     source->on_clone(new_clone, source);
 353
 354   return new_clone;
 355 }
 356
 357 void *memcached_get_user_data(const memcached_st *ptr)
 358 {
 359   return ptr->user_data;
 360 }
 361
 362 void *memcached_set_user_data(memcached_st *ptr, void *data)
 363 {
 364   void *ret= ptr->user_data;
 365   ptr->user_data= data;
 366
 367   return ret;
 368 }
 369
 370 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 371 {
 372   return memcached_server_push(destination, source->servers);
 373 }
 374
 375 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 376 {
 377   return &ptr->servers[server_key];
 378 }
 379
 380 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 381 {
 382   return &ptr->servers[server_key];
 383 }