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