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