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   },
  19   .flags= {
  20     .auto_eject_hosts= false,
  21     .binary_protocol= false,
  22     .buffer_requests= false,
  23     .cork= false,
  24     .hash_with_prefix_key= false,
  25     .ketama_weighted= false,
  26     .no_block= false,
  27     .no_reply= false,
  28     .randomize_replica_read= false,
  29     .reuse_memory= false,
  30     .support_cas= false,
  31     .tcp_nodelay= false,
  32     .use_cache_lookups= false,
  33     .use_sort_hosts= false,
  34     .use_udp= false,
  35     .verify_key= false
  36   }
  37 };
  38
  39 static inline bool _memcached_init(memcached_st *self)
  40 {
  41   self->state= global_copy.state;
  42   self->flags= global_copy.flags;
  43
  44   self->distribution= MEMCACHED_DISTRIBUTION_MODULA;
  45
  46   hashkit_st *hash_ptr;
  47   hash_ptr= hashkit_create(&self->hashkit);
  48   if (! hash_ptr)
  49     return false;
  50
  51   self->continuum_points_counter= 0;
  52
  53   self->number_of_hosts= 0;
  54   self->servers= NULL;
  55   self->last_disconnected_server= NULL;
  56
  57   self->snd_timeout= 0;
  58   self->rcv_timeout= 0;
  59   self->server_failure_limit= 0;
  60
  61   /* TODO, Document why we picked these defaults */
  62   self->io_msg_watermark= 500;
  63   self->io_bytes_watermark= 65 * 1024;
  64
  65   self->io_key_prefetch= 0;
  66   self->cached_errno= 0;
  67   self->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  68   self->connect_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  69   self->retry_timeout= 0;
  70   self->continuum_count= 0;
  71
  72   self->send_size= -1;
  73   self->recv_size= -1;
  74
  75   self->user_data= NULL;
  76   self->next_distribution_rebuild= 0;
  77   self->prefix_key_length= 0;
  78   self->number_of_replicas= 0;
  79   hash_ptr= hashkit_create(&self->distribution_hashkit);
  80   if (! hash_ptr)
  81     return false;
  82   self->continuum= NULL;
  83
  84   self->allocators= memcached_allocators_return_default();
  85
  86   self->on_clone= NULL;
  87   self->on_cleanup= NULL;
  88   self->get_key_failure= NULL;
  89   self->delete_trigger= NULL;
  90   self->callbacks= NULL;
  91 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
  92   self->sasl.callbacks= NULL;
  93   self->sasl.is_allocated= false;
  94 #endif
  95
  96   return true;
  97 }
  98
  99 memcached_st *memcached_create(memcached_st *ptr)
 100 {
 101   if (ptr == NULL)
 102   {
 103     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 104
 105     if (! ptr)
 106     {
 107       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 108     }
 109
 110     ptr->options.is_allocated= true;
 111   }
 112   else
 113   {
 114     ptr->options.is_allocated= false;
 115   }
 116
 117 #if 0
 118   memcached_set_purging(ptr, false);
 119   memcached_set_processing_input(ptr, false);
 120 #endif
 121
 122   if (! _memcached_init(ptr))
 123   {
 124     memcached_free(ptr);
 125     return NULL;
 126   }
 127
 128   if (! memcached_result_create(ptr, &ptr->result))
 129   {
 130     memcached_free(ptr);
 131     return NULL;
 132   }
 133
 134   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 135
 136   return ptr;
 137 }
 138
 139 void memcached_servers_reset(memcached_st *ptr)
 140 {
 141   memcached_server_list_free(memcached_server_list(ptr));
 142
 143   memcached_server_list_set(ptr, NULL);
 144   ptr->number_of_hosts= 0;
 145   ptr->last_disconnected_server= NULL;
 146   ptr->server_failure_limit= 0;
 147 }
 148
 149 void memcached_free(memcached_st *ptr)
 150 {
 151   /* If we have anything open, lets close it now */
 152   memcached_quit(ptr);
 153   memcached_server_list_free(memcached_server_list(ptr));
 154   memcached_result_free(&ptr->result);
 155
 156   if (ptr->on_cleanup)
 157     ptr->on_cleanup(ptr);
 158
 159   if (ptr->continuum)
 160     libmemcached_free(ptr, ptr->continuum);
 161
 162 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 163   if (ptr->sasl.callbacks != NULL)
 164   {
 165     memcached_destroy_sasl_auth_data(ptr);
 166   }
 167 #endif
 168
 169   if (memcached_is_allocated(ptr))
 170   {
 171     libmemcached_free(ptr, ptr);
 172   }
 173 }
 174
 175 /*
 176   clone is the destination, while source is the structure to clone.
 177   If source is NULL the call is the same as if a memcached_create() was
 178   called.
 179 */
 180 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 181 {
 182   memcached_return_t rc= MEMCACHED_SUCCESS;
 183   memcached_st *new_clone;
 184
 185   if (source == NULL)
 186     return memcached_create(clone);
 187
 188   if (clone && memcached_is_allocated(clone))
 189   {
 190     return NULL;
 191   }
 192
 193   new_clone= memcached_create(clone);
 194
 195   if (new_clone == NULL)
 196     return NULL;
 197
 198   new_clone->flags= source->flags;
 199   new_clone->send_size= source->send_size;
 200   new_clone->recv_size= source->recv_size;
 201   new_clone->poll_timeout= source->poll_timeout;
 202   new_clone->connect_timeout= source->connect_timeout;
 203   new_clone->retry_timeout= source->retry_timeout;
 204   new_clone->distribution= source->distribution;
 205
 206   hashkit_st *hash_ptr;
 207
 208   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 209   if (! hash_ptr)
 210   {
 211     memcached_free(new_clone);
 212     return NULL;
 213   }
 214
 215   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 216   if (! hash_ptr)
 217   {
 218     memcached_free(new_clone);
 219     return NULL;
 220   }
 221
 222   new_clone->user_data= source->user_data;
 223
 224   new_clone->snd_timeout= source->snd_timeout;
 225   new_clone->rcv_timeout= source->rcv_timeout;
 226
 227   new_clone->on_clone= source->on_clone;
 228   new_clone->on_cleanup= source->on_cleanup;
 229
 230   new_clone->allocators= source->allocators;
 231
 232   new_clone->get_key_failure= source->get_key_failure;
 233   new_clone->delete_trigger= source->delete_trigger;
 234   new_clone->server_failure_limit= source->server_failure_limit;
 235   new_clone->io_msg_watermark= source->io_msg_watermark;
 236   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 237   new_clone->io_key_prefetch= source->io_key_prefetch;
 238   new_clone->number_of_replicas= source->number_of_replicas;
 239
 240   if (memcached_server_count(source))
 241     rc= memcached_push(new_clone, source);
 242
 243   if (rc != MEMCACHED_SUCCESS)
 244   {
 245     memcached_free(new_clone);
 246
 247     return NULL;
 248   }
 249
 250
 251   if (source->prefix_key_length)
 252   {
 253     strcpy(new_clone->prefix_key, source->prefix_key);
 254     new_clone->prefix_key_length= source->prefix_key_length;
 255   }
 256
 257 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 258   if (source->sasl.callbacks)
 259   {
 260     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 261     {
 262       memcached_free(new_clone);
 263       return NULL;
 264     }
 265   }
 266 #endif
 267
 268   rc= run_distribution(new_clone);
 269
 270   if (rc != MEMCACHED_SUCCESS)
 271   {
 272     memcached_free(new_clone);
 273
 274     return NULL;
 275   }
 276
 277   if (source->on_clone)
 278     source->on_clone(new_clone, source);
 279
 280   return new_clone;
 281 }
 282
 283 void *memcached_get_user_data(const memcached_st *ptr)
 284 {
 285   return ptr->user_data;
 286 }
 287
 288 void *memcached_set_user_data(memcached_st *ptr, void *data)
 289 {
 290   void *ret= ptr->user_data;
 291   ptr->user_data= data;
 292
 293   return ret;
 294 }
 295
 296 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 297 {
 298   return memcached_server_push(destination, source->servers);
 299 }
 300
 301 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 302 {
 303   return &ptr->servers[server_key];
 304 }
 305
 306 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 307 {
 308   return &ptr->servers[server_key];
 309 }