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     .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     .ping_service= 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->ketama.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->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  71   self->connect_timeout= MEMCACHED_DEFAULT_CONNECT_TIMEOUT;
  72   self->retry_timeout= 0;
  73   self->ketama.continuum_count= 0;
  74
  75   self->send_size= -1;
  76   self->recv_size= -1;
  77
  78   self->user_data= NULL;
  79   self->ketama.next_distribution_rebuild= 0;
  80   self->number_of_replicas= 0;
  81   hash_ptr= hashkit_create(&self->distribution_hashkit);
  82   if (! hash_ptr)
  83     return false;
  84   self->ketama.continuum= NULL;
  85
  86   self->allocators= memcached_allocators_return_default();
  87
  88   self->on_clone= NULL;
  89   self->on_cleanup= NULL;
  90   self->get_key_failure= NULL;
  91   self->delete_trigger= NULL;
  92   self->callbacks= NULL;
  93   self->sasl.callbacks= NULL;
  94   self->sasl.is_allocated= false;
  95
  96   self->error_messages= NULL;
  97   self->prefix_key= NULL;
  98   self->configure.filename= NULL;
  99
 100   return true;
 101 }
 102
 103 static void _free(memcached_st *ptr, bool release_st)
 104 {
 105   /* If we have anything open, lets close it now */
 106   memcached_quit(ptr);
 107   memcached_server_list_free(memcached_server_list(ptr));
 108   memcached_result_free(&ptr->result);
 109
 110   if (ptr->last_disconnected_server)
 111     memcached_server_free(ptr->last_disconnected_server);
 112
 113   if (ptr->on_cleanup)
 114     ptr->on_cleanup(ptr);
 115
 116   if (ptr->ketama.continuum)
 117     libmemcached_free(ptr, ptr->ketama.continuum);
 118
 119   memcached_array_free(ptr->prefix_key);
 120   ptr->prefix_key= NULL;
 121
 122   memcached_error_free(ptr);
 123
 124   if (ptr->sasl.callbacks)
 125   {
 126 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 127     memcached_destroy_sasl_auth_data(ptr);
 128 #endif
 129   }
 130
 131   if (release_st)
 132   {
 133     memcached_array_free(ptr->configure.filename);
 134     ptr->configure.filename= NULL;
 135   }
 136
 137   if (memcached_is_allocated(ptr) && release_st)
 138   {
 139     libmemcached_free(ptr, ptr);
 140   }
 141 }
 142
 143 memcached_st *memcached_create(memcached_st *ptr)
 144 {
 145   if (ptr == NULL)
 146   {
 147     ptr= (memcached_st *)malloc(sizeof(memcached_st));
 148
 149     if (! ptr)
 150     {
 151       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 152     }
 153
 154     ptr->options.is_allocated= true;
 155   }
 156   else
 157   {
 158     ptr->options.is_allocated= false;
 159   }
 160
 161 #if 0
 162   memcached_set_purging(ptr, false);
 163   memcached_set_processing_input(ptr, false);
 164 #endif
 165
 166   if (! _memcached_init(ptr))
 167   {
 168     memcached_free(ptr);
 169     return NULL;
 170   }
 171
 172   if (! memcached_result_create(ptr, &ptr->result))
 173   {
 174     memcached_free(ptr);
 175     return NULL;
 176   }
 177
 178   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 179
 180   return ptr;
 181 }
 182
 183 memcached_st *memcached_create_with_options(const char *string, size_t length)
 184 {
 185   memcached_st *self= memcached_create(NULL);
 186
 187   if (! self)
 188     return NULL;
 189
 190   memcached_return_t rc;
 191   if ((rc= memcached_parse_configuration(self, string, length)) != MEMCACHED_SUCCESS)
 192   {
 193     return self;
 194   }
 195
 196   if (memcached_parse_filename(self))
 197   {
 198     rc= memcached_parse_configure_file(self, memcached_parse_filename(self), memcached_parse_filename_length(self));
 199   }
 200
 201   return self;
 202 }
 203
 204 memcached_return_t memcached_reset(memcached_st *ptr)
 205 {
 206   WATCHPOINT_ASSERT(ptr);
 207   if (! ptr)
 208     return MEMCACHED_INVALID_ARGUMENTS;
 209
 210   bool stored_is_allocated= memcached_is_allocated(ptr);
 211   _free(ptr, false);
 212   memcached_create(ptr);
 213   memcached_set_allocated(ptr, stored_is_allocated);
 214
 215   if (ptr->configure.filename)
 216   {
 217     return memcached_parse_configure_file(ptr, memcached_param_array(ptr->configure.filename));
 218   }
 219
 220   return MEMCACHED_SUCCESS;
 221 }
 222
 223 void memcached_servers_reset(memcached_st *ptr)
 224 {
 225   memcached_server_list_free(memcached_server_list(ptr));
 226
 227   memcached_server_list_set(ptr, NULL);
 228   ptr->number_of_hosts= 0;
 229   if (ptr->last_disconnected_server)
 230   {
 231     memcached_server_free(ptr->last_disconnected_server);
 232   }
 233   ptr->last_disconnected_server= NULL;
 234   ptr->server_failure_limit= 0;
 235 }
 236
 237 void memcached_reset_last_disconnected_server(memcached_st *ptr)
 238 {
 239   if (ptr->last_disconnected_server)
 240   {
 241     memcached_server_free(ptr->last_disconnected_server);
 242     ptr->last_disconnected_server= NULL;
 243   }
 244 }
 245
 246 void memcached_free(memcached_st *ptr)
 247 {
 248   _free(ptr, true);
 249 }
 250
 251 /*
 252   clone is the destination, while source is the structure to clone.
 253   If source is NULL the call is the same as if a memcached_create() was
 254   called.
 255 */
 256 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 257 {
 258   memcached_return_t rc= MEMCACHED_SUCCESS;
 259   memcached_st *new_clone;
 260
 261   if (source == NULL)
 262     return memcached_create(clone);
 263
 264   if (clone && memcached_is_allocated(clone))
 265   {
 266     return NULL;
 267   }
 268
 269   new_clone= memcached_create(clone);
 270
 271   if (new_clone == NULL)
 272     return NULL;
 273
 274   new_clone->flags= source->flags;
 275   new_clone->send_size= source->send_size;
 276   new_clone->recv_size= source->recv_size;
 277   new_clone->poll_timeout= source->poll_timeout;
 278   new_clone->connect_timeout= source->connect_timeout;
 279   new_clone->retry_timeout= source->retry_timeout;
 280   new_clone->distribution= source->distribution;
 281
 282   hashkit_st *hash_ptr;
 283
 284   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 285   if (! hash_ptr)
 286   {
 287     memcached_free(new_clone);
 288     return NULL;
 289   }
 290
 291   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 292   if (! hash_ptr)
 293   {
 294     memcached_free(new_clone);
 295     return NULL;
 296   }
 297
 298   new_clone->user_data= source->user_data;
 299
 300   new_clone->snd_timeout= source->snd_timeout;
 301   new_clone->rcv_timeout= source->rcv_timeout;
 302
 303   new_clone->on_clone= source->on_clone;
 304   new_clone->on_cleanup= source->on_cleanup;
 305
 306   new_clone->allocators= source->allocators;
 307
 308   new_clone->get_key_failure= source->get_key_failure;
 309   new_clone->delete_trigger= source->delete_trigger;
 310   new_clone->server_failure_limit= source->server_failure_limit;
 311   new_clone->io_msg_watermark= source->io_msg_watermark;
 312   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 313   new_clone->io_key_prefetch= source->io_key_prefetch;
 314   new_clone->number_of_replicas= source->number_of_replicas;
 315   new_clone->tcp_keepidle= source->tcp_keepidle;
 316
 317   if (memcached_server_count(source))
 318     rc= memcached_push(new_clone, source);
 319
 320   if (rc != MEMCACHED_SUCCESS)
 321   {
 322     memcached_free(new_clone);
 323
 324     return NULL;
 325   }
 326
 327
 328   new_clone->prefix_key= memcached_array_clone(new_clone, source->prefix_key);
 329
 330 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
 331   if (source->sasl.callbacks)
 332   {
 333     if (memcached_clone_sasl(new_clone, source) != MEMCACHED_SUCCESS)
 334     {
 335       memcached_free(new_clone);
 336       return NULL;
 337     }
 338   }
 339 #endif
 340
 341   rc= run_distribution(new_clone);
 342
 343   if (rc != MEMCACHED_SUCCESS)
 344   {
 345     memcached_free(new_clone);
 346
 347     return NULL;
 348   }
 349
 350   if (source->on_clone)
 351     source->on_clone(new_clone, source);
 352
 353   return new_clone;
 354 }
 355
 356 void *memcached_get_user_data(const memcached_st *ptr)
 357 {
 358   return ptr->user_data;
 359 }
 360
 361 void *memcached_set_user_data(memcached_st *ptr, void *data)
 362 {
 363   void *ret= ptr->user_data;
 364   ptr->user_data= data;
 365
 366   return ret;
 367 }
 368
 369 memcached_return_t memcached_push(memcached_st *destination, const memcached_st *source)
 370 {
 371   return memcached_server_push(destination, source->servers);
 372 }
 373
 374 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key)
 375 {
 376   return &ptr->servers[server_key];
 377 }
 378
 379 memcached_server_instance_st memcached_server_instance_by_position(const memcached_st *ptr, uint32_t server_key)
 380 {
 381   return &ptr->servers[server_key];
 382 }