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     .load_from_file= false
  39
  40   }
  41 };
  42
  43 static inline bool _memcached_init(memcached_st *self)
  44 {
  45   self->state= global_copy.state;
  46   self->flags= global_copy.flags;
  47
  48   self->distribution= MEMCACHED_DISTRIBUTION_MODULA;
  49
  50   hashkit_st *hash_ptr;
  51   hash_ptr= hashkit_create(&self->hashkit);
  52   if (! hash_ptr)
  53     return false;
  54
  55   self->continuum_points_counter= 0;
  56
  57   self->number_of_hosts= 0;
  58   self->servers= NULL;
  59   self->last_disconnected_server= NULL;
  60
  61   self->snd_timeout= 0;
  62   self->rcv_timeout= 0;
  63   self->server_failure_limit= 0;
  64
  65   /* TODO, Document why we picked these defaults */
  66   self->io_msg_watermark= 500;
  67   self->io_bytes_watermark= 65 * 1024;
  68
  69   self->tcp_keepidle= 0;
  70
  71   self->io_key_prefetch= 0;
  72   self->cached_errno= 0;
  73   self->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  74   self->connect_timeout= MEMCACHED_DEFAULT_CONNECT_TIMEOUT;
  75   self->retry_timeout= 0;
  76   self->continuum_count= 0;
  77
  78   self->send_size= -1;
  79   self->recv_size= -1;
  80
  81   self->user_data= NULL;
  82   self->next_distribution_rebuild= 0;
  83   self->prefix_key_length= 0;
  84   self->number_of_replicas= 0;
  85   hash_ptr= hashkit_create(&self->distribution_hashkit);
  86   if (! hash_ptr)
  87     return false;
  88   self->continuum= NULL;
  89
  90   self->allocators= memcached_allocators_return_default();
  91
  92   self->on_clone= NULL;
  93   self->on_cleanup= NULL;
  94   self->get_key_failure= NULL;
  95   self->delete_trigger= NULL;
  96   self->callbacks= NULL;
  97   self->sasl.callbacks= NULL;
  98   self->sasl.is_allocated= false;
  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_reset_last_disconnected_server(memcached_st *ptr)
 158 {
 159   if (ptr->last_disconnected_server)
 160   {
 161     memcached_server_free(ptr->last_disconnected_server);
 162     ptr->last_disconnected_server= NULL;
 163   }
 164 }
 165
 166 void memcached_free(memcached_st *ptr)
 167 {
 168   /* If we have anything open, lets close it now */
 169   memcached_quit(ptr);
 170   memcached_server_list_free(memcached_server_list(ptr));
 171   memcached_result_free(&ptr->result);
 172
 173   if (ptr->last_disconnected_server)
 174     memcached_server_free(ptr->last_disconnected_server);
 175
 176   if (ptr->on_cleanup)
 177     ptr->on_cleanup(ptr);
 178
 179   if (ptr->continuum)
 180     libmemcached_free(ptr, ptr->continuum);
 181
 182   if (ptr->sasl.callbacks)
 183   {
 184 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 185     memcached_destroy_sasl_auth_data(ptr);
 186 #endif
 187   }
 188
 189   if (memcached_is_allocated(ptr))
 190   {
 191     libmemcached_free(ptr, ptr);
 192   }
 193 }
 194
 195 /*
 196   clone is the destination, while source is the structure to clone.
 197   If source is NULL the call is the same as if a memcached_create() was
 198   called.
 199 */
 200 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 201 {
 202   memcached_return_t rc= MEMCACHED_SUCCESS;
 203   memcached_st *new_clone;
 204
 205   if (source == NULL)
 206     return memcached_create(clone);
 207
 208   if (clone && memcached_is_allocated(clone))
 209   {
 210     return NULL;
 211   }
 212
 213   new_clone= memcached_create(clone);
 214
 215   if (new_clone == NULL)
 216     return NULL;
 217
 218   new_clone->flags= source->flags;
 219   new_clone->send_size= source->send_size;
 220   new_clone->recv_size= source->recv_size;
 221   new_clone->poll_timeout= source->poll_timeout;
 222   new_clone->connect_timeout= source->connect_timeout;
 223   new_clone->retry_timeout= source->retry_timeout;
 224   new_clone->distribution= source->distribution;
 225
 226   hashkit_st *hash_ptr;
 227
 228   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 229   if (! hash_ptr)
 230   {
 231     memcached_free(new_clone);
 232     return NULL;
 233   }
 234
 235   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 236   if (! hash_ptr)
 237   {
 238     memcached_free(new_clone);
 239     return NULL;
 240   }
 241
 242   new_clone->user_data= source->user_data;
 243
 244   new_clone->snd_timeout= source->snd_timeout;
 245   new_clone->rcv_timeout= source->rcv_timeout;
 246
 247   new_clone->on_clone= source->on_clone;
 248   new_clone->on_cleanup= source->on_cleanup;
 249
 250   new_clone->allocators= source->allocators;
 251
 252   new_clone->get_key_failure= source->get_key_failure;
 253   new_clone->delete_trigger= source->delete_trigger;
 254   new_clone->server_failure_limit= source->server_failure_limit;
 255   new_clone->io_msg_watermark= source->io_msg_watermark;
 256   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 257   new_clone->io_key_prefetch= source->io_key_prefetch;
 258   new_clone->number_of_replicas= source->number_of_replicas;
 259   new_clone->tcp_keepidle= source->tcp_keepidle;
 260
 261   if (memcached_server_count(source))
 262     rc= memcached_push(new_clone, source);
 263
 264   if (rc != MEMCACHED_SUCCESS)
 265   {
 266     memcached_free(new_clone);
 267
 268     return NULL;
 269   }
 270
 271
 272   if (source->prefix_key_length)
 273   {
 274     strcpy(new_clone->prefix_key, source->prefix_key);
 275     new_clone->prefix_key_length= source->prefix_key_length;
 276   }
 277
 278 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 279   if (source->sasl.callbacks)
 280   {
 281     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 282     {
 283       memcached_free(new_clone);
 284       return NULL;
 285     }
 286   }
 287 #endif
 288
 289   rc= run_distribution(new_clone);
 290
 291   if (rc != MEMCACHED_SUCCESS)
 292   {
 293     memcached_free(new_clone);
 294
 295     return NULL;
 296   }
 297
 298   if (source->on_clone)
 299     source->on_clone(new_clone, source);
 300
 301   return new_clone;
 302 }
 303
 304 void *memcached_get_user_data(const memcached_st *ptr)
 305 {
 306   return ptr->user_data;
 307 }
 308
 309 void *memcached_set_user_data(memcached_st *ptr, void *data)
 310 {
 311   void *ret= ptr->user_data;
 312   ptr->user_data= data;
 313
 314   return ret;
 315 }
 316
 317 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 318 {
 319   return memcached_server_push(destination, source->servers);
 320 }
 321
 322 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 323 {
 324   return &ptr->servers[server_key];
 325 }
 326
 327 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 328 {
 329   return &ptr->servers[server_key];
 330 }