git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/memcached.c

   1 /*
   2   Memcached library
   3 */
   4 #include "common.h"
   5
   6 static const memcached_st global_copy= {
   7   .state= {
   8     .is_purging= false,
   9     .is_processing_input= false,
  10   },
  11   .flags= {
  12     .auto_eject_hosts= false,
  13     .binary_protocol= false,
  14     .buffer_requests= false,
  15     .cork= false,
  16     .hash_with_prefix_key= false,
  17     .ketama_weighted= false,
  18     .no_block= false,
  19     .no_reply= false,
  20     .randomize_replica_read= false,
  21     .reuse_memory= false,
  22     .support_cas= false,
  23     .tcp_nodelay= false,
  24     .use_cache_lookups= false,
  25     .use_sort_hosts= false,
  26     .use_udp= false,
  27     .verify_key= false
  28   }
  29 };
  30
  31 static inline bool _memcached_init(memcached_st *self)
  32 {
  33   self->state= global_copy.state;
  34   self->flags= global_copy.flags;
  35
  36   self->distribution= MEMCACHED_DISTRIBUTION_MODULA;
  37
  38   hashkit_st *hash_ptr;
  39   hash_ptr= hashkit_create(&self->hashkit);
  40   if (! hash_ptr)
  41     return false;
  42
  43   self->continuum_points_counter= 0;
  44
  45   self->number_of_hosts= 0;
  46   self->servers= NULL;
  47   self->last_disconnected_server= NULL;
  48
  49   self->snd_timeout= 0;
  50   self->rcv_timeout= 0;
  51   self->server_failure_limit= 0;
  52
  53   /* TODO, Document why we picked these defaults */
  54   self->io_msg_watermark= 500;
  55   self->io_bytes_watermark= 65 * 1024;
  56
  57   self->io_key_prefetch= 0;
  58   self->cached_errno= 0;
  59   self->poll_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  60   self->connect_timeout= MEMCACHED_DEFAULT_TIMEOUT;
  61   self->retry_timeout= 0;
  62   self->continuum_count= 0;
  63
  64   self->send_size= -1;
  65   self->recv_size= -1;
  66
  67   self->user_data= NULL;
  68   self->next_distribution_rebuild= 0;
  69   self->prefix_key_length= 0;
  70   self->number_of_replicas= 0;
  71   hash_ptr= hashkit_create(&self->distribution_hashkit);
  72   if (! hash_ptr)
  73     return false;
  74   self->continuum= NULL;
  75
  76   self->allocators= memcached_allocators_return_default();
  77
  78   self->on_clone= NULL;
  79   self->on_cleanup= NULL;
  80   self->get_key_failure= NULL;
  81   self->delete_trigger= NULL;
  82   self->callbacks= NULL;
  83
  84   return true;
  85 }
  86
  87 memcached_st *memcached_create(memcached_st *ptr)
  88 {
  89   if (ptr == NULL)
  90   {
  91     ptr= (memcached_st *)malloc(sizeof(memcached_st));
  92
  93     if (! ptr)
  94     {
  95       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
  96     }
  97
  98     ptr->options.is_allocated= true;
  99   }
 100   else
 101   {
 102     ptr->options.is_allocated= false;
 103   }
 104
 105 #if 0
 106   memcached_set_purging(ptr, false);
 107   memcached_set_processing_input(ptr, false);
 108 #endif
 109
 110   if (! _memcached_init(ptr))
 111   {
 112     memcached_free(ptr);
 113     return NULL;
 114   }
 115
 116   if (! memcached_result_create(ptr, &ptr->result))
 117   {
 118     memcached_free(ptr);
 119     return NULL;
 120   }
 121
 122   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 123
 124   return ptr;
 125 }
 126
 127 void server_list_free(memcached_st *ptr, memcached_server_st *servers)
 128 {
 129   uint32_t x;
 130
 131   if (servers == NULL)
 132     return;
 133
 134   for (x= 0; x < memcached_servers_count(servers); x++)
 135   {
 136     if (servers[x].address_info)
 137     {
 138       freeaddrinfo(servers[x].address_info);
 139       servers[x].address_info= NULL;
 140     }
 141   }
 142
 143   if (ptr)
 144   {
 145     libmemcached_free(ptr, servers);
 146   }
 147   else
 148   {
 149     free(servers);
 150   }
 151 }
 152
 153 void memcached_servers_reset(memcached_st *ptr)
 154 {
 155   server_list_free(ptr, memcached_server_list(ptr));
 156
 157   memcached_server_list_set(ptr, NULL);
 158   ptr->number_of_hosts= 0;
 159   ptr->last_disconnected_server= NULL;
 160   ptr->server_failure_limit= 0;
 161 }
 162
 163 void memcached_free(memcached_st *ptr)
 164 {
 165   /* If we have anything open, lets close it now */
 166   memcached_quit(ptr);
 167   server_list_free(ptr, memcached_server_list(ptr));
 168   memcached_result_free(&ptr->result);
 169
 170   if (ptr->on_cleanup)
 171     ptr->on_cleanup(ptr);
 172
 173   if (ptr->continuum)
 174     libmemcached_free(ptr, ptr->continuum);
 175
 176   if (memcached_is_allocated(ptr))
 177   {
 178     libmemcached_free(ptr, ptr);
 179   }
 180 }
 181
 182 /*
 183   clone is the destination, while source is the structure to clone.
 184   If source is NULL the call is the same as if a memcached_create() was
 185   called.
 186 */
 187 memcached_st *memcached_clone(memcached_st *clone, const memcached_st *source)
 188 {
 189   memcached_return_t rc= MEMCACHED_SUCCESS;
 190   memcached_st *new_clone;
 191
 192   if (source == NULL)
 193     return memcached_create(clone);
 194
 195   if (clone && memcached_is_allocated(clone))
 196   {
 197     return NULL;
 198   }
 199
 200   new_clone= memcached_create(clone);
 201
 202   if (new_clone == NULL)
 203     return NULL;
 204
 205   new_clone->flags= source->flags;
 206   new_clone->send_size= source->send_size;
 207   new_clone->recv_size= source->recv_size;
 208   new_clone->poll_timeout= source->poll_timeout;
 209   new_clone->connect_timeout= source->connect_timeout;
 210   new_clone->retry_timeout= source->retry_timeout;
 211   new_clone->distribution= source->distribution;
 212
 213   hashkit_st *hash_ptr;
 214
 215   hash_ptr= hashkit_clone(&new_clone->hashkit, &source->hashkit);
 216   if (! hash_ptr)
 217   {
 218     memcached_free(new_clone);
 219     return NULL;
 220   }
 221
 222   hash_ptr= hashkit_clone(&new_clone->distribution_hashkit, &source->distribution_hashkit);
 223   if (! hash_ptr)
 224   {
 225     memcached_free(new_clone);
 226     return NULL;
 227   }
 228
 229   new_clone->user_data= source->user_data;
 230
 231   new_clone->snd_timeout= source->snd_timeout;
 232   new_clone->rcv_timeout= source->rcv_timeout;
 233
 234   new_clone->on_clone= source->on_clone;
 235   new_clone->on_cleanup= source->on_cleanup;
 236
 237   new_clone->allocators= source->allocators;
 238
 239   new_clone->get_key_failure= source->get_key_failure;
 240   new_clone->delete_trigger= source->delete_trigger;
 241   new_clone->server_failure_limit= source->server_failure_limit;
 242   new_clone->io_msg_watermark= source->io_msg_watermark;
 243   new_clone->io_bytes_watermark= source->io_bytes_watermark;
 244   new_clone->io_key_prefetch= source->io_key_prefetch;
 245   new_clone->number_of_replicas= source->number_of_replicas;
 246
 247   if (memcached_server_list(source))
 248     rc= memcached_server_push(new_clone, memcached_server_list(source));
 249
 250   if (rc != MEMCACHED_SUCCESS)
 251   {
 252     memcached_free(new_clone);
 253
 254     return NULL;
 255   }
 256
 257
 258   if (source->prefix_key_length)
 259   {
 260     strcpy(new_clone->prefix_key, source->prefix_key);
 261     new_clone->prefix_key_length= source->prefix_key_length;
 262   }
 263
 264   rc= run_distribution(new_clone);
 265
 266   if (rc != MEMCACHED_SUCCESS)
 267   {
 268     memcached_free(new_clone);
 269
 270     return NULL;
 271   }
 272
 273   if (source->on_clone)
 274     source->on_clone(new_clone, source);
 275
 276   return new_clone;
 277 }
 278
 279 void *memcached_get_user_data(const memcached_st *ptr)
 280 {
 281   return ptr->user_data;
 282 }
 283
 284 void *memcached_set_user_data(memcached_st *ptr, void *data)
 285 {
 286   void *ret= ptr->user_data;
 287   ptr->user_data= data;
 288
 289   return ret;
 290 }