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);
  71
  72   self->on_clone= NULL;
  73   self->on_cleanup= NULL;
  74   self->get_key_failure= NULL;
  75   self->delete_trigger= NULL;
  76   self->callbacks= NULL;
  77 }
  78
  79 memcached_st *memcached_create(memcached_st *ptr)
  80 {
  81   if (ptr == NULL)
  82   {
  83     ptr= (memcached_st *)malloc(sizeof(memcached_st));
  84
  85     if (! ptr)
  86     {
  87       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
  88     }
  89
  90     ptr->options.is_allocated= true;
  91   }
  92   else
  93   {
  94     ptr->options.is_allocated= false;
  95   }
  96
  97 #if 0
  98   memcached_set_purging(ptr, false);
  99   memcached_set_processing_input(ptr, false);
 100 #endif
 101
 102   _memcached_init(ptr);
 103
 104   if (! memcached_result_create(ptr, &ptr->result))
 105   {
 106     memcached_free(ptr);
 107     return NULL;
 108   }
 109
 110   WATCHPOINT_ASSERT_INITIALIZED(&ptr->result);
 111
 112   return ptr;
 113 }
 114
 115 void server_list_free(memcached_st *ptr, memcached_server_st *servers)
 116 {
 117   uint32_t x;
 118
 119   if (servers == NULL)
 120     return;
 121
 122   for (x= 0; x < memcached_servers_count(servers); x++)
 123   {
 124     if (servers[x].address_info)
 125     {
 126       freeaddrinfo(servers[x].address_info);
 127       servers[x].address_info= NULL;
 128     }
 129   }
 130
 131   if (ptr)
 132   {
 133     ptr->call_free(ptr, servers);
 134   }
 135   else
 136   {
 137     free(servers);
 138   }
 139 }
 140
 141 void memcached_servers_reset(memcached_st *ptr)
 142 {
 143   server_list_free(ptr, memcached_server_list(ptr));
 144
 145   memcached_server_list_set(ptr, NULL);
 146   ptr->number_of_hosts= 0;
 147   ptr->last_disconnected_server= NULL;
 148   ptr->server_failure_limit= 0;
 149 }
 150
 151 void memcached_free(memcached_st *ptr)
 152 {
 153   /* If we have anything open, lets close it now */
 154   memcached_quit(ptr);
 155   server_list_free(ptr, memcached_server_list(ptr));
 156   memcached_result_free(&ptr->result);
 157
 158   if (ptr->on_cleanup)
 159     ptr->on_cleanup(ptr);
 160
 161   if (ptr->continuum)
 162     ptr->call_free(ptr, ptr->continuum);
 163
 164   if (memcached_is_allocated(ptr))
 165   {
 166     ptr->call_free(ptr, ptr);
 167   }
 168 }
 169
 170 /*
 171   clone is the destination, while source is the structure to clone.
 172   If source is NULL the call is the same as if a memcached_create() was
 173   called.
 174 */
 175 memcached_st *memcached_clone(memcached_st *clone, memcached_st *source)
 176 {
 177   memcached_return_t rc= MEMCACHED_SUCCESS;
 178   memcached_st *new_clone;
 179
 180   if (source == NULL)
 181     return memcached_create(clone);
 182
 183   if (clone && memcached_is_allocated(clone))
 184   {
 185     return NULL;
 186   }
 187
 188   new_clone= memcached_create(clone);
 189
 190   if (new_clone == NULL)
 191     return NULL;
 192
 193   new_clone->flags= source->flags;
 194   new_clone->send_size= source->send_size;
 195   new_clone->recv_size= source->recv_size;
 196   new_clone->poll_timeout= source->poll_timeout;
 197   new_clone->connect_timeout= source->connect_timeout;
 198   new_clone->retry_timeout= source->retry_timeout;
 199   new_clone->distribution= source->distribution;
 200   new_clone->hash= source->hash;
 201   new_clone->distribution_hash= source->distribution_hash;
 202   new_clone->user_data= source->user_data;
 203
 204   new_clone->snd_timeout= source->snd_timeout;
 205   new_clone->rcv_timeout= source->rcv_timeout;
 206
 207   new_clone->on_clone= source->on_clone;
 208   new_clone->on_cleanup= source->on_cleanup;
 209   new_clone->call_free= source->call_free;
 210   new_clone->call_malloc= source->call_malloc;
 211   new_clone->call_realloc= source->call_realloc;
 212   new_clone->call_calloc= source->call_calloc;
 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 }