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