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