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.callbacks= NULL;
  96   self->sasl.is_allocated= false;
  97
  98   return true;
  99 }
 100
 101 memcached_st *memcached_create(memcached_st *ptr)
 102 {
 103   if (ptr == NULL)
 104   {
 105     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 106
 107     if (! ptr)
 108     {
 109       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 110     }
 111
 112     ptr->options.is_allocated= true;
 113   }
 114   else
 115   {
 116     ptr->options.is_allocated= false;
 117   }
 118
 119 #if 0
 120   memcached_set_purging(ptr, false);
 121   memcached_set_processing_input(ptr, false);
 122 #endif
 123
 124   if (! _memcached_init(ptr))
 125   {
 126     memcached_free(ptr);
 127     return NULL;
 128   }
 129
 130   if (! memcached_result_create(ptr, &ptr->result))
 131   {
 132     memcached_free(ptr);
 133     return NULL;
 134   }
 135
 136   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 137
 138   return ptr;
 139 }
 140
 141 void memcached_servers_reset(memcached_st *ptr)
 142 {
 143   memcached_server_list_free(memcached_server_list(ptr));
 144
 145   memcached_server_list_set(ptr, NULL);
 146   ptr->number_of_hosts= 0;
 147   if (ptr->last_disconnected_server)
 148   {
 149     memcached_server_free(ptr->last_disconnected_server);
 150   }
 151   ptr->last_disconnected_server= NULL;
 152   ptr->server_failure_limit= 0;
 153 }
 154
 155 void memcached_reset_last_disconnected_server(memcached_st *ptr)
 156 {
 157   if (ptr->last_disconnected_server)
 158   {
 159     memcached_server_free(ptr->last_disconnected_server);
 160     ptr->last_disconnected_server= NULL;
 161   }
 162 }
 163
 164 void memcached_free(memcached_st *ptr)
 165 {
 166   /* If we have anything open, lets close it now */
 167   memcached_quit(ptr);
 168   memcached_server_list_free(memcached_server_list(ptr));
 169   memcached_result_free(&ptr->result);
 170
 171   if (ptr->last_disconnected_server)
 172     memcached_server_free(ptr->last_disconnected_server);
 173
 174   if (ptr->on_cleanup)
 175     ptr->on_cleanup(ptr);
 176
 177   if (ptr->continuum)
 178     libmemcached_free(ptr, ptr->continuum);
 179
 180   if (ptr->sasl.callbacks)
 181   {
 182 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 183     memcached_destroy_sasl_auth_data(ptr);
 184 #endif
 185   }
 186
 187   if (memcached_is_allocated(ptr))
 188   {
 189     libmemcached_free(ptr, ptr);
 190   }
 191 }
 192
 193 /*
 194   clone is the destination, while source is the structure to clone.
 195   If source is NULL the call is the same as if a memcached_create() was
 196   called.
 197 */
 198 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 199 {
 200   memcached_return_t rc= MEMCACHED_SUCCESS;
 201   memcached_st *new_clone;
 202
 203   if (source == NULL)
 204     return memcached_create(clone);
 205
 206   if (clone && memcached_is_allocated(clone))
 207   {
 208     return NULL;
 209   }
 210
 211   new_clone= memcached_create(clone);
 212
 213   if (new_clone == NULL)
 214     return NULL;
 215
 216   new_clone->flags= source->flags;
 217   new_clone->send_size= source->send_size;
 218   new_clone->recv_size= source->recv_size;
 219   new_clone->poll_timeout= source->poll_timeout;
 220   new_clone->connect_timeout= source->connect_timeout;
 221   new_clone->retry_timeout= source->retry_timeout;
 222   new_clone->distribution= source->distribution;
 223
 224   hashkit_st *hash_ptr;
 225
 226   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 227   if (! hash_ptr)
 228   {
 229     memcached_free(new_clone);
 230     return NULL;
 231   }
 232
 233   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 234   if (! hash_ptr)
 235   {
 236     memcached_free(new_clone);
 237     return NULL;
 238   }
 239
 240   new_clone->user_data= source->user_data;
 241
 242   new_clone->snd_timeout= source->snd_timeout;
 243   new_clone->rcv_timeout= source->rcv_timeout;
 244
 245   new_clone->on_clone= source->on_clone;
 246   new_clone->on_cleanup= source->on_cleanup;
 247
 248   new_clone->allocators= source->allocators;
 249
 250   new_clone->get_key_failure= source->get_key_failure;
 251   new_clone->delete_trigger= source->delete_trigger;
 252   new_clone->server_failure_limit= source->server_failure_limit;
 253   new_clone->io_msg_watermark= source->io_msg_watermark;
 254   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 255   new_clone->io_key_prefetch= source->io_key_prefetch;
 256   new_clone->number_of_replicas= source->number_of_replicas;
 257   new_clone->tcp_keepidle= source->tcp_keepidle;
 258
 259   if (memcached_server_count(source))
 260     rc= memcached_push(new_clone, source);
 261
 262   if (rc != MEMCACHED_SUCCESS)
 263   {
 264     memcached_free(new_clone);
 265
 266     return NULL;
 267   }
 268
 269
 270   if (source->prefix_key_length)
 271   {
 272     strcpy(new_clone->prefix_key, source->prefix_key);
 273     new_clone->prefix_key_length= source->prefix_key_length;
 274   }
 275
 276 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 277   if (source->sasl.callbacks)
 278   {
 279     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 280     {
 281       memcached_free(new_clone);
 282       return NULL;
 283     }
 284   }
 285 #endif
 286
 287   rc= run_distribution(new_clone);
 288
 289   if (rc != MEMCACHED_SUCCESS)
 290   {
 291     memcached_free(new_clone);
 292
 293     return NULL;
 294   }
 295
 296   if (source->on_clone)
 297     source->on_clone(new_clone, source);
 298
 299   return new_clone;
 300 }
 301
 302 void *memcached_get_user_data(const memcached_st *ptr)
 303 {
 304   return ptr->user_data;
 305 }
 306
 307 void *memcached_set_user_data(memcached_st *ptr, void *data)
 308 {
 309   void *ret= ptr->user_data;
 310   ptr->user_data= data;
 311
 312   return ret;
 313 }
 314
 315 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 316 {
 317   return memcached_server_push(destination, source->servers);
 318 }
 319
 320 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 321 {
 322   return &ptr->servers[server_key];
 323 }
 324
 325 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 326 {
 327   return &ptr->servers[server_key];
 328 }