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   }
  39 };
  40
  41 static inline bool _memcached_init(memcached_st *self)
  42 {
  43   self->state= global_copy.state;
  44   self->flags= global_copy.flags;
  45
  46   self->distribution= MEMCACHED_DISTRIBUTION_MODULA;
  47
  48   hashkit_st *hash_ptr;
  49   hash_ptr= hashkit_create(&self->hashkit);
  50   if (! hash_ptr)
  51     return false;
  52
  53   self->continuum_points_counter= 0;
  54
  55   self->number_of_hosts= 0;
  56   self->servers= NULL;
  57   self->last_disconnected_server= NULL;
  58
  59   self->snd_timeout= 0;
  60   self->rcv_timeout= 0;
  61   self->server_failure_limit= 0;
  62
  63   /* TODO, Document why we picked these defaults */
  64   self->io_msg_watermark= 500;
  65   self->io_bytes_watermark= 65 * 1024;
  66
  67   self->tcp_keepidle= 0;
  68
  69   self->io_key_prefetch= 0;
  70   self->cached_errno= 0;
  71   self->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  72   self->connect_timeout= MEMCACHED_DEFAULT_CONNECT_TIMEOUT;
  73   self->retry_timeout= 0;
  74   self->continuum_count= 0;
  75
  76   self->send_size= -1;
  77   self->recv_size= -1;
  78
  79   self->user_data= NULL;
  80   self->next_distribution_rebuild= 0;
  81   self->prefix_key_length= 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= NULL;
  96
  97   return true;
  98 }
  99
 100 memcached_st *memcached_create(memcached_st *ptr)
 101 {
 102   if (ptr == NULL)
 103   {
 104     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 105
 106     if (! ptr)
 107     {
 108       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 109     }
 110
 111     ptr->options.is_allocated= true;
 112   }
 113   else
 114   {
 115     ptr->options.is_allocated= false;
 116   }
 117
 118 #if 0
 119   memcached_set_purging(ptr, false);
 120   memcached_set_processing_input(ptr, false);
 121 #endif
 122
 123   if (! _memcached_init(ptr))
 124   {
 125     memcached_free(ptr);
 126     return NULL;
 127   }
 128
 129   if (! memcached_result_create(ptr, &ptr->result))
 130   {
 131     memcached_free(ptr);
 132     return NULL;
 133   }
 134
 135   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 136
 137   return ptr;
 138 }
 139
 140 void memcached_servers_reset(memcached_st *ptr)
 141 {
 142   memcached_server_list_free(memcached_server_list(ptr));
 143
 144   memcached_server_list_set(ptr, NULL);
 145   ptr->number_of_hosts= 0;
 146   if (ptr->last_disconnected_server)
 147   {
 148     memcached_server_free(ptr->last_disconnected_server);
 149   }
 150   ptr->last_disconnected_server= NULL;
 151   ptr->server_failure_limit= 0;
 152 }
 153
 154 void memcached_reset_last_disconnected_server(memcached_st *ptr)
 155 {
 156   if (ptr->last_disconnected_server)
 157   {
 158     memcached_server_free(ptr->last_disconnected_server);
 159     ptr->last_disconnected_server= NULL;
 160   }
 161 }
 162
 163 void memcached_free(memcached_st *ptr)
 164 {
 165   /* If we have anything open, lets close it now */
 166   memcached_quit(ptr);
 167   memcached_server_list_free(memcached_server_list(ptr));
 168   memcached_result_free(&ptr->result);
 169
 170   if (ptr->last_disconnected_server)
 171     memcached_server_free(ptr->last_disconnected_server);
 172
 173   if (ptr->on_cleanup)
 174     ptr->on_cleanup(ptr);
 175
 176   if (ptr->continuum)
 177     libmemcached_free(ptr, ptr->continuum);
 178
 179   if (ptr->sasl)
 180   {
 181 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 182     memcached_destroy_sasl_auth_data(ptr);
 183 #endif
 184   }
 185
 186   if (memcached_is_allocated(ptr))
 187   {
 188     libmemcached_free(ptr, ptr);
 189   }
 190 }
 191
 192 /*
 193   clone is the destination, while source is the structure to clone.
 194   If source is NULL the call is the same as if a memcached_create() was
 195   called.
 196 */
 197 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 198 {
 199   memcached_return_t rc= MEMCACHED_SUCCESS;
 200   memcached_st *new_clone;
 201
 202   if (source == NULL)
 203     return memcached_create(clone);
 204
 205   if (clone && memcached_is_allocated(clone))
 206   {
 207     return NULL;
 208   }
 209
 210   new_clone= memcached_create(clone);
 211
 212   if (new_clone == NULL)
 213     return NULL;
 214
 215   new_clone->flags= source->flags;
 216   new_clone->send_size= source->send_size;
 217   new_clone->recv_size= source->recv_size;
 218   new_clone->poll_timeout= source->poll_timeout;
 219   new_clone->connect_timeout= source->connect_timeout;
 220   new_clone->retry_timeout= source->retry_timeout;
 221   new_clone->distribution= source->distribution;
 222
 223   hashkit_st *hash_ptr;
 224
 225   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 226   if (! hash_ptr)
 227   {
 228     memcached_free(new_clone);
 229     return NULL;
 230   }
 231
 232   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 233   if (! hash_ptr)
 234   {
 235     memcached_free(new_clone);
 236     return NULL;
 237   }
 238
 239   new_clone->user_data= source->user_data;
 240
 241   new_clone->snd_timeout= source->snd_timeout;
 242   new_clone->rcv_timeout= source->rcv_timeout;
 243
 244   new_clone->on_clone= source->on_clone;
 245   new_clone->on_cleanup= source->on_cleanup;
 246
 247   new_clone->allocators= source->allocators;
 248
 249   new_clone->get_key_failure= source->get_key_failure;
 250   new_clone->delete_trigger= source->delete_trigger;
 251   new_clone->server_failure_limit= source->server_failure_limit;
 252   new_clone->io_msg_watermark= source->io_msg_watermark;
 253   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 254   new_clone->io_key_prefetch= source->io_key_prefetch;
 255   new_clone->number_of_replicas= source->number_of_replicas;
 256   new_clone->tcp_keepidle= source->tcp_keepidle;
 257
 258   if (memcached_server_count(source))
 259     rc= memcached_push(new_clone, source);
 260
 261   if (rc != MEMCACHED_SUCCESS)
 262   {
 263     memcached_free(new_clone);
 264
 265     return NULL;
 266   }
 267
 268
 269   if (source->prefix_key_length)
 270   {
 271     strcpy(new_clone->prefix_key, source->prefix_key);
 272     new_clone->prefix_key_length= source->prefix_key_length;
 273   }
 274
 275 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 276   if (source->sasl && source->sasl->callbacks)
 277   {
 278     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 279     {
 280       memcached_free(new_clone);
 281       return NULL;
 282     }
 283   }
 284 #endif
 285
 286   rc= run_distribution(new_clone);
 287
 288   if (rc != MEMCACHED_SUCCESS)
 289   {
 290     memcached_free(new_clone);
 291
 292     return NULL;
 293   }
 294
 295   if (source->on_clone)
 296     source->on_clone(new_clone, source);
 297
 298   return new_clone;
 299 }
 300
 301 void *memcached_get_user_data(const memcached_st *ptr)
 302 {
 303   return ptr->user_data;
 304 }
 305
 306 void *memcached_set_user_data(memcached_st *ptr, void *data)
 307 {
 308   void *ret= ptr->user_data;
 309   ptr->user_data= data;
 310
 311   return ret;
 312 }
 313
 314 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 315 {
 316   return memcached_server_push(destination, source->servers);
 317 }
 318
 319 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 320 {
 321   return &ptr->servers[server_key];
 322 }
 323
 324 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 325 {
 326   return &ptr->servers[server_key];
 327 }