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     .tcp_keepalive= false
  37   }
  38 };
  39
  40 static inline bool _memcached_init(memcached_st *self)
  41 {
  42   self->state= global_copy.state;
  43   self->flags= global_copy.flags;
  44
  45   self->distribution= MEMCACHED_DISTRIBUTION_MODULA;
  46
  47   hashkit_st *hash_ptr;
  48   hash_ptr= hashkit_create(&self->hashkit);
  49   if (! hash_ptr)
  50     return false;
  51
  52   self->continuum_points_counter= 0;
  53
  54   self->number_of_hosts= 0;
  55   self->servers= NULL;
  56   self->last_disconnected_server= NULL;
  57
  58   self->snd_timeout= 0;
  59   self->rcv_timeout= 0;
  60   self->server_failure_limit= 0;
  61
  62   /* TODO, Document why we picked these defaults */
  63   self->io_msg_watermark= 500;
  64   self->io_bytes_watermark= 65 * 1024;
  65
  66   self->tcp_keepidle= 0;
  67
  68   self->io_key_prefetch= 0;
  69   self->cached_errno= 0;
  70   self->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  71   self->connect_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  72   self->retry_timeout= 0;
  73   self->continuum_count= 0;
  74
  75   self->send_size= -1;
  76   self->recv_size= -1;
  77
  78   self->user_data= NULL;
  79   self->next_distribution_rebuild= 0;
  80   self->prefix_key_length= 0;
  81   self->number_of_replicas= 0;
  82   hash_ptr= hashkit_create(&self->distribution_hashkit);
  83   if (! hash_ptr)
  84     return false;
  85   self->continuum= NULL;
  86
  87   self->allocators= memcached_allocators_return_default();
  88
  89   self->on_clone= NULL;
  90   self->on_cleanup= NULL;
  91   self->get_key_failure= NULL;
  92   self->delete_trigger= NULL;
  93   self->callbacks= NULL;
  94 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
  95   self->sasl.callbacks= NULL;
  96   self->sasl.is_allocated= false;
  97 #endif
  98
  99   return true;
 100 }
 101
 102 memcached_st *memcached_create(memcached_st *ptr)
 103 {
 104   if (ptr == NULL)
 105   {
 106     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 107
 108     if (! ptr)
 109     {
 110       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 111     }
 112
 113     ptr->options.is_allocated= true;
 114   }
 115   else
 116   {
 117     ptr->options.is_allocated= false;
 118   }
 119
 120 #if 0
 121   memcached_set_purging(ptr, false);
 122   memcached_set_processing_input(ptr, false);
 123 #endif
 124
 125   if (! _memcached_init(ptr))
 126   {
 127     memcached_free(ptr);
 128     return NULL;
 129   }
 130
 131   if (! memcached_result_create(ptr, &ptr->result))
 132   {
 133     memcached_free(ptr);
 134     return NULL;
 135   }
 136
 137   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 138
 139   return ptr;
 140 }
 141
 142 void memcached_servers_reset(memcached_st *ptr)
 143 {
 144   memcached_server_list_free(memcached_server_list(ptr));
 145
 146   memcached_server_list_set(ptr, NULL);
 147   ptr->number_of_hosts= 0;
 148   ptr->last_disconnected_server= NULL;
 149   ptr->server_failure_limit= 0;
 150 }
 151
 152 void memcached_free(memcached_st *ptr)
 153 {
 154   /* If we have anything open, lets close it now */
 155   memcached_quit(ptr);
 156   memcached_server_list_free(memcached_server_list(ptr));
 157   memcached_result_free(&ptr->result);
 158
 159   if (ptr->on_cleanup)
 160     ptr->on_cleanup(ptr);
 161
 162   if (ptr->continuum)
 163     libmemcached_free(ptr, ptr->continuum);
 164
 165 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 166   if (ptr->sasl.callbacks != NULL)
 167   {
 168     memcached_destroy_sasl_auth_data(ptr);
 169   }
 170 #endif
 171
 172   if (memcached_is_allocated(ptr))
 173   {
 174     libmemcached_free(ptr, ptr);
 175   }
 176 }
 177
 178 /*
 179   clone is the destination, while source is the structure to clone.
 180   If source is NULL the call is the same as if a memcached_create() was
 181   called.
 182 */
 183 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 184 {
 185   memcached_return_t rc= MEMCACHED_SUCCESS;
 186   memcached_st *new_clone;
 187
 188   if (source == NULL)
 189     return memcached_create(clone);
 190
 191   if (clone && memcached_is_allocated(clone))
 192   {
 193     return NULL;
 194   }
 195
 196   new_clone= memcached_create(clone);
 197
 198   if (new_clone == NULL)
 199     return NULL;
 200
 201   new_clone->flags= source->flags;
 202   new_clone->send_size= source->send_size;
 203   new_clone->recv_size= source->recv_size;
 204   new_clone->poll_timeout= source->poll_timeout;
 205   new_clone->connect_timeout= source->connect_timeout;
 206   new_clone->retry_timeout= source->retry_timeout;
 207   new_clone->distribution= source->distribution;
 208
 209   hashkit_st *hash_ptr;
 210
 211   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 212   if (! hash_ptr)
 213   {
 214     memcached_free(new_clone);
 215     return NULL;
 216   }
 217
 218   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 219   if (! hash_ptr)
 220   {
 221     memcached_free(new_clone);
 222     return NULL;
 223   }
 224
 225   new_clone->user_data= source->user_data;
 226
 227   new_clone->snd_timeout= source->snd_timeout;
 228   new_clone->rcv_timeout= source->rcv_timeout;
 229
 230   new_clone->on_clone= source->on_clone;
 231   new_clone->on_cleanup= source->on_cleanup;
 232
 233   new_clone->allocators= source->allocators;
 234
 235   new_clone->get_key_failure= source->get_key_failure;
 236   new_clone->delete_trigger= source->delete_trigger;
 237   new_clone->server_failure_limit= source->server_failure_limit;
 238   new_clone->io_msg_watermark= source->io_msg_watermark;
 239   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 240   new_clone->io_key_prefetch= source->io_key_prefetch;
 241   new_clone->number_of_replicas= source->number_of_replicas;
 242   new_clone->tcp_keepidle= source->tcp_keepidle;
 243
 244   if (memcached_server_count(source))
 245     rc= memcached_push(new_clone, source);
 246
 247   if (rc != MEMCACHED_SUCCESS)
 248   {
 249     memcached_free(new_clone);
 250
 251     return NULL;
 252   }
 253
 254
 255   if (source->prefix_key_length)
 256   {
 257     strcpy(new_clone->prefix_key, source->prefix_key);
 258     new_clone->prefix_key_length= source->prefix_key_length;
 259   }
 260
 261 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 262   if (source->sasl.callbacks)
 263   {
 264     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 265     {
 266       memcached_free(new_clone);
 267       return NULL;
 268     }
 269   }
 270 #endif
 271
 272   rc= run_distribution(new_clone);
 273
 274   if (rc != MEMCACHED_SUCCESS)
 275   {
 276     memcached_free(new_clone);
 277
 278     return NULL;
 279   }
 280
 281   if (source->on_clone)
 282     source->on_clone(new_clone, source);
 283
 284   return new_clone;
 285 }
 286
 287 void *memcached_get_user_data(const memcached_st *ptr)
 288 {
 289   return ptr->user_data;
 290 }
 291
 292 void *memcached_set_user_data(memcached_st *ptr, void *data)
 293 {
 294   void *ret= ptr->user_data;
 295   ptr->user_data= data;
 296
 297   return ret;
 298 }
 299
 300 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 301 {
 302   return memcached_server_push(destination, source->servers);
 303 }
 304
 305 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 306 {
 307   return &ptr->servers[server_key];
 308 }
 309
 310 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 311 {
 312   return &ptr->servers[server_key];
 313 }