git.m6w6.name Git - awesomized/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->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->cached_errno= 0;
  72   self->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  73   self->connect_timeout= MEMCACHED_DEFAULT_CONNECT_TIMEOUT;
  74   self->retry_timeout= 0;
  75   self->continuum_count= 0;
  76
  77   self->send_size= -1;
  78   self->recv_size= -1;
  79
  80   self->user_data= NULL;
  81   self->next_distribution_rebuild= 0;
  82   self->number_of_replicas= 0;
  83   hash_ptr= hashkit_create(&self->distribution_hashkit);
  84   if (! hash_ptr)
  85     return false;
  86   self->continuum= NULL;
  87
  88   self->allocators= memcached_allocators_return_default();
  89
  90   self->on_clone= NULL;
  91   self->on_cleanup= NULL;
  92   self->get_key_failure= NULL;
  93   self->delete_trigger= NULL;
  94   self->callbacks= NULL;
  95   self->sasl.callbacks= NULL;
  96   self->sasl.is_allocated= false;
  97
  98   self->error_messages= NULL;
  99   self->prefix_key= NULL;
 100   self->configure.filename= NULL;
 101
 102   return true;
 103 }
 104
 105 static void _free(memcached_st *ptr, bool release_st)
 106 {
 107   /* If we have anything open, lets close it now */
 108   memcached_quit(ptr);
 109   memcached_server_list_free(memcached_server_list(ptr));
 110   memcached_result_free(&ptr->result);
 111
 112   if (ptr->last_disconnected_server)
 113     memcached_server_free(ptr->last_disconnected_server);
 114
 115   if (ptr->on_cleanup)
 116     ptr->on_cleanup(ptr);
 117
 118   if (ptr->continuum)
 119     libmemcached_free(ptr, ptr->continuum);
 120
 121   memcached_array_free(ptr->prefix_key);
 122   ptr->prefix_key= NULL;
 123
 124   memcached_error_free(ptr);
 125
 126   if (ptr->sasl.callbacks)
 127   {
 128 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 129     memcached_destroy_sasl_auth_data(ptr);
 130 #endif
 131   }
 132
 133   if (release_st)
 134   {
 135     memcached_array_free(ptr->configure.filename);
 136     ptr->configure.filename= NULL;
 137   }
 138
 139   if (memcached_is_allocated(ptr) && release_st)
 140   {
 141     libmemcached_free(ptr, ptr);
 142   }
 143 }
 144
 145 memcached_st *memcached_create(memcached_st *ptr)
 146 {
 147   if (ptr == NULL)
 148   {
 149     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 150
 151     if (! ptr)
 152     {
 153       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 154     }
 155
 156     ptr->options.is_allocated= true;
 157   }
 158   else
 159   {
 160     ptr->options.is_allocated= false;
 161   }
 162
 163 #if 0
 164   memcached_set_purging(ptr, false);
 165   memcached_set_processing_input(ptr, false);
 166 #endif
 167
 168   if (! _memcached_init(ptr))
 169   {
 170     memcached_free(ptr);
 171     return NULL;
 172   }
 173
 174   if (! memcached_result_create(ptr, &ptr->result))
 175   {
 176     memcached_free(ptr);
 177     return NULL;
 178   }
 179
 180   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 181
 182   return ptr;
 183 }
 184
 185 memcached_st *memcached_create_with_options(const char *string, size_t length)
 186 {
 187   memcached_st *self= memcached_create(NULL);
 188
 189   if (! self)
 190     return NULL;
 191
 192   memcached_return_t rc;
 193   if ((rc= memcached_parse_configuration(self, string, length)) != MEMCACHED_SUCCESS)
 194   {
 195     return self;
 196   }
 197
 198   if (memcached_parse_filename(self))
 199   {
 200     rc= memcached_parse_configure_file(self, memcached_parse_filename(self), memcached_parse_filename_length(self));
 201   }
 202
 203   return self;
 204 }
 205
 206 memcached_return_t memcached_reset(memcached_st *ptr)
 207 {
 208   WATCHPOINT_ASSERT(ptr);
 209   if (! ptr)
 210     return MEMCACHED_INVALID_ARGUMENTS;
 211
 212   bool stored_is_allocated= memcached_is_allocated(ptr);
 213   _free(ptr, false);
 214   memcached_create(ptr);
 215   memcached_set_allocated(ptr, stored_is_allocated);
 216
 217   if (ptr->configure.filename)
 218   {
 219     return memcached_parse_configure_file(ptr, memcached_param_array(ptr->configure.filename));
 220   }
 221
 222   return MEMCACHED_SUCCESS;
 223 }
 224
 225 void memcached_servers_reset(memcached_st *ptr)
 226 {
 227   memcached_server_list_free(memcached_server_list(ptr));
 228
 229   memcached_server_list_set(ptr, NULL);
 230   ptr->number_of_hosts= 0;
 231   if (ptr->last_disconnected_server)
 232   {
 233     memcached_server_free(ptr->last_disconnected_server);
 234   }
 235   ptr->last_disconnected_server= NULL;
 236   ptr->server_failure_limit= 0;
 237 }
 238
 239 void memcached_reset_last_disconnected_server(memcached_st *ptr)
 240 {
 241   if (ptr->last_disconnected_server)
 242   {
 243     memcached_server_free(ptr->last_disconnected_server);
 244     ptr->last_disconnected_server= NULL;
 245   }
 246 }
 247
 248 void memcached_free(memcached_st *ptr)
 249 {
 250   _free(ptr, true);
 251 }
 252
 253 /*
 254   clone is the destination, while source is the structure to clone.
 255   If source is NULL the call is the same as if a memcached_create() was
 256   called.
 257 */
 258 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 259 {
 260   memcached_return_t rc= MEMCACHED_SUCCESS;
 261   memcached_st *new_clone;
 262
 263   if (source == NULL)
 264     return memcached_create(clone);
 265
 266   if (clone && memcached_is_allocated(clone))
 267   {
 268     return NULL;
 269   }
 270
 271   new_clone= memcached_create(clone);
 272
 273   if (new_clone == NULL)
 274     return NULL;
 275
 276   new_clone->flags= source->flags;
 277   new_clone->send_size= source->send_size;
 278   new_clone->recv_size= source->recv_size;
 279   new_clone->poll_timeout= source->poll_timeout;
 280   new_clone->connect_timeout= source->connect_timeout;
 281   new_clone->retry_timeout= source->retry_timeout;
 282   new_clone->distribution= source->distribution;
 283
 284   hashkit_st *hash_ptr;
 285
 286   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 287   if (! hash_ptr)
 288   {
 289     memcached_free(new_clone);
 290     return NULL;
 291   }
 292
 293   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 294   if (! hash_ptr)
 295   {
 296     memcached_free(new_clone);
 297     return NULL;
 298   }
 299
 300   new_clone->user_data= source->user_data;
 301
 302   new_clone->snd_timeout= source->snd_timeout;
 303   new_clone->rcv_timeout= source->rcv_timeout;
 304
 305   new_clone->on_clone= source->on_clone;
 306   new_clone->on_cleanup= source->on_cleanup;
 307
 308   new_clone->allocators= source->allocators;
 309
 310   new_clone->get_key_failure= source->get_key_failure;
 311   new_clone->delete_trigger= source->delete_trigger;
 312   new_clone->server_failure_limit= source->server_failure_limit;
 313   new_clone->io_msg_watermark= source->io_msg_watermark;
 314   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 315   new_clone->io_key_prefetch= source->io_key_prefetch;
 316   new_clone->number_of_replicas= source->number_of_replicas;
 317   new_clone->tcp_keepidle= source->tcp_keepidle;
 318
 319   if (memcached_server_count(source))
 320     rc= memcached_push(new_clone, source);
 321
 322   if (rc != MEMCACHED_SUCCESS)
 323   {
 324     memcached_free(new_clone);
 325
 326     return NULL;
 327   }
 328
 329
 330   new_clone->prefix_key= memcached_array_clone(new_clone, source->prefix_key);
 331
 332 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 333   if (source->sasl.callbacks)
 334   {
 335     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 336     {
 337       memcached_free(new_clone);
 338       return NULL;
 339     }
 340   }
 341 #endif
 342
 343   rc= run_distribution(new_clone);
 344
 345   if (rc != MEMCACHED_SUCCESS)
 346   {
 347     memcached_free(new_clone);
 348
 349     return NULL;
 350   }
 351
 352   if (source->on_clone)
 353     source->on_clone(new_clone, source);
 354
 355   return new_clone;
 356 }
 357
 358 void *memcached_get_user_data(const memcached_st *ptr)
 359 {
 360   return ptr->user_data;
 361 }
 362
 363 void *memcached_set_user_data(memcached_st *ptr, void *data)
 364 {
 365   void *ret= ptr->user_data;
 366   ptr->user_data= data;
 367
 368   return ret;
 369 }
 370
 371 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 372 {
 373   return memcached_server_push(destination, source->servers);
 374 }
 375
 376 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 377 {
 378   return &ptr->servers[server_key];
 379 }
 380
 381 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 382 {
 383   return &ptr->servers[server_key];
 384 }