git.m6w6.name Git - m6w6/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     .ping_service= false
  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->number_of_replicas= 0;
  84   hash_ptr= hashkit_create(&self->distribution_hashkit);
  85   if (! hash_ptr)
  86     return false;
  87   self->continuum= NULL;
  88
  89   self->allocators= memcached_allocators_return_default();
  90
  91   self->on_clone= NULL;
  92   self->on_cleanup= NULL;
  93   self->get_key_failure= NULL;
  94   self->delete_trigger= NULL;
  95   self->callbacks= NULL;
  96   self->sasl.callbacks= NULL;
  97   self->sasl.is_allocated= false;
  98
  99   self->error_messages= NULL;
 100   self->prefix_key= NULL;
 101
 102   return true;
 103 }
 104
 105 static void _free(memcached_st *ptr, bool release_st)
 106 {
 107   /* If we have anything open, lets close it now */
 108   memcached_quit(ptr);
 109   memcached_server_list_free(memcached_server_list(ptr));
 110   memcached_result_free(&ptr->result);
 111
 112   if (ptr->last_disconnected_server)
 113     memcached_server_free(ptr->last_disconnected_server);
 114
 115   if (ptr->on_cleanup)
 116     ptr->on_cleanup(ptr);
 117
 118   if (ptr->continuum)
 119     libmemcached_free(ptr, ptr->continuum);
 120
 121   memcached_array_free(ptr->prefix_key);
 122   ptr->prefix_key= NULL;
 123
 124   memcached_error_free(ptr);
 125
 126   if (ptr->sasl.callbacks)
 127   {
 128 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 129     memcached_destroy_sasl_auth_data(ptr);
 130 #endif
 131   }
 132
 133   if (memcached_is_allocated(ptr) && release_st)
 134   {
 135     libmemcached_free(ptr, ptr);
 136   }
 137 }
 138
 139 memcached_st *memcached_create(memcached_st *ptr)
 140 {
 141   if (ptr == NULL)
 142   {
 143     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 144
 145     if (! ptr)
 146     {
 147       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 148     }
 149
 150     ptr->options.is_allocated= true;
 151   }
 152   else
 153   {
 154     ptr->options.is_allocated= false;
 155   }
 156
 157 #if 0
 158   memcached_set_purging(ptr, false);
 159   memcached_set_processing_input(ptr, false);
 160 #endif
 161
 162   if (! _memcached_init(ptr))
 163   {
 164     memcached_free(ptr);
 165     return NULL;
 166   }
 167
 168   if (! memcached_result_create(ptr, &ptr->result))
 169   {
 170     memcached_free(ptr);
 171     return NULL;
 172   }
 173
 174   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 175
 176   return ptr;
 177 }
 178
 179 memcached_st *memcached_create_with_options(const char *string, size_t length)
 180 {
 181   memcached_st *self= memcached_create(NULL);
 182
 183   if (! self)
 184     return NULL;
 185
 186   memcached_parse_options(self, string, length);
 187
 188   return self;
 189 }
 190
 191 void memcached_reset(memcached_st *ptr)
 192 {
 193   WATCHPOINT_ASSERT(ptr);
 194   if (! ptr)
 195     return;
 196
 197   bool stored_is_allocated= memcached_is_allocated(ptr);
 198   _free(ptr, false);
 199   memcached_create(ptr);
 200   memcached_set_allocated(ptr, stored_is_allocated);
 201 }
 202
 203 void memcached_servers_reset(memcached_st *ptr)
 204 {
 205   memcached_server_list_free(memcached_server_list(ptr));
 206
 207   memcached_server_list_set(ptr, NULL);
 208   ptr->number_of_hosts= 0;
 209   if (ptr->last_disconnected_server)
 210   {
 211     memcached_server_free(ptr->last_disconnected_server);
 212   }
 213   ptr->last_disconnected_server= NULL;
 214   ptr->server_failure_limit= 0;
 215 }
 216
 217 void memcached_reset_last_disconnected_server(memcached_st *ptr)
 218 {
 219   if (ptr->last_disconnected_server)
 220   {
 221     memcached_server_free(ptr->last_disconnected_server);
 222     ptr->last_disconnected_server= NULL;
 223   }
 224 }
 225
 226 void memcached_free(memcached_st *ptr)
 227 {
 228   _free(ptr, true);
 229 }
 230
 231 /*
 232   clone is the destination, while source is the structure to clone.
 233   If source is NULL the call is the same as if a memcached_create() was
 234   called.
 235 */
 236 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 237 {
 238   memcached_return_t rc= MEMCACHED_SUCCESS;
 239   memcached_st *new_clone;
 240
 241   if (source == NULL)
 242     return memcached_create(clone);
 243
 244   if (clone && memcached_is_allocated(clone))
 245   {
 246     return NULL;
 247   }
 248
 249   new_clone= memcached_create(clone);
 250
 251   if (new_clone == NULL)
 252     return NULL;
 253
 254   new_clone->flags= source->flags;
 255   new_clone->send_size= source->send_size;
 256   new_clone->recv_size= source->recv_size;
 257   new_clone->poll_timeout= source->poll_timeout;
 258   new_clone->connect_timeout= source->connect_timeout;
 259   new_clone->retry_timeout= source->retry_timeout;
 260   new_clone->distribution= source->distribution;
 261
 262   hashkit_st *hash_ptr;
 263
 264   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 265   if (! hash_ptr)
 266   {
 267     memcached_free(new_clone);
 268     return NULL;
 269   }
 270
 271   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 272   if (! hash_ptr)
 273   {
 274     memcached_free(new_clone);
 275     return NULL;
 276   }
 277
 278   new_clone->user_data= source->user_data;
 279
 280   new_clone->snd_timeout= source->snd_timeout;
 281   new_clone->rcv_timeout= source->rcv_timeout;
 282
 283   new_clone->on_clone= source->on_clone;
 284   new_clone->on_cleanup= source->on_cleanup;
 285
 286   new_clone->allocators= source->allocators;
 287
 288   new_clone->get_key_failure= source->get_key_failure;
 289   new_clone->delete_trigger= source->delete_trigger;
 290   new_clone->server_failure_limit= source->server_failure_limit;
 291   new_clone->io_msg_watermark= source->io_msg_watermark;
 292   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 293   new_clone->io_key_prefetch= source->io_key_prefetch;
 294   new_clone->number_of_replicas= source->number_of_replicas;
 295   new_clone->tcp_keepidle= source->tcp_keepidle;
 296
 297   if (memcached_server_count(source))
 298     rc= memcached_push(new_clone, source);
 299
 300   if (rc != MEMCACHED_SUCCESS)
 301   {
 302     memcached_free(new_clone);
 303
 304     return NULL;
 305   }
 306
 307
 308   new_clone->prefix_key= memcached_array_clone(new_clone, source->prefix_key);
 309
 310 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 311   if (source->sasl.callbacks)
 312   {
 313     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 314     {
 315       memcached_free(new_clone);
 316       return NULL;
 317     }
 318   }
 319 #endif
 320
 321   rc= run_distribution(new_clone);
 322
 323   if (rc != MEMCACHED_SUCCESS)
 324   {
 325     memcached_free(new_clone);
 326
 327     return NULL;
 328   }
 329
 330   if (source->on_clone)
 331     source->on_clone(new_clone, source);
 332
 333   return new_clone;
 334 }
 335
 336 void *memcached_get_user_data(const memcached_st *ptr)
 337 {
 338   return ptr->user_data;
 339 }
 340
 341 void *memcached_set_user_data(memcached_st *ptr, void *data)
 342 {
 343   void *ret= ptr->user_data;
 344   ptr->user_data= data;
 345
 346   return ret;
 347 }
 348
 349 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 350 {
 351   return memcached_server_push(destination, source->servers);
 352 }
 353
 354 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 355 {
 356   return &ptr->servers[server_key];
 357 }
 358
 359 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 360 {
 361   return &ptr->servers[server_key];
 362 }