git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/memcached_behavior.c

   1 #include "common.h"
   2 #include <sys/types.h>
   3 #include <sys/socket.h>
   4 #include <netinet/tcp.h>
   5
   6 /*
   7   This function is used to modify the behabior of running client.
   8
   9   We quit all connections so we can reset the sockets.
  10 */
  11
  12 void set_behavior_flag(memcached_st *ptr, memcached_flags temp_flag, uint64_t data)
  13 {
  14   if (data)
  15     ptr->flags|= temp_flag;
  16   else
  17     ptr->flags&= ~temp_flag;
  18 }
  19
  20 memcached_return memcached_behavior_set(memcached_st *ptr,
  21                                         memcached_behavior flag,
  22                                         uint64_t data)
  23 {
  24   switch (flag)
  25   {
  26   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  27     set_behavior_flag(ptr, MEM_SUPPORT_CAS, data);
  28     break;
  29   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  30     set_behavior_flag(ptr, MEM_NO_BLOCK, data);
  31     memcached_quit(ptr);
  32   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
  33     set_behavior_flag(ptr, MEM_BUFFER_REQUESTS, data);
  34     memcached_quit(ptr);
  35     break;
  36   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
  37     set_behavior_flag(ptr, MEM_TCP_NODELAY, data);
  38     memcached_quit(ptr);
  39     break;
  40   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
  41     {
  42       ptr->distribution= (memcached_server_distribution)(data);
  43       run_distribution(ptr);
  44       break;
  45     }
  46   case MEMCACHED_BEHAVIOR_KETAMA:
  47     {
  48       if (data)
  49       {
  50         ptr->hash= MEMCACHED_HASH_MD5;
  51         ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  52       }
  53       else
  54       {
  55         ptr->hash= 0;
  56         ptr->distribution= 0;
  57       }
  58       run_distribution(ptr);
  59       break;
  60     }
  61   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
  62     {
  63       ptr->hash= MEMCACHED_HASH_MD5;
  64       ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  65       set_behavior_flag(ptr, MEM_KETAMA_WEIGHTED, data);
  66       run_distribution(ptr);
  67       break;
  68     }
  69   case MEMCACHED_BEHAVIOR_HASH:
  70     ptr->hash= (memcached_hash)(data);
  71     break;
  72   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
  73     ptr->hash_continuum= (memcached_hash)(data);
  74     run_distribution(ptr);
  75     break;
  76   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
  77     set_behavior_flag(ptr, MEM_USE_CACHE_LOOKUPS, data);
  78     memcached_quit(ptr);
  79     break;
  80   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
  81     set_behavior_flag(ptr, MEM_VERIFY_KEY, data);
  82     break;
  83   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
  84     {
  85       set_behavior_flag(ptr, MEM_USE_SORT_HOSTS, data);
  86       run_distribution(ptr);
  87
  88       break;
  89     }
  90   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
  91     ptr->poll_timeout= (int32_t)data;
  92     break;
  93   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
  94     ptr->connect_timeout= (int32_t)data;
  95     break;
  96   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
  97     ptr->retry_timeout= (int32_t)data;
  98     break;
  99   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 100     ptr->send_size= (int32_t)data;
 101     memcached_quit(ptr);
 102     break;
 103   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 104     ptr->recv_size= (int32_t)data;
 105     memcached_quit(ptr);
 106     break;
 107   case MEMCACHED_BEHAVIOR_USER_DATA:
 108     return MEMCACHED_FAILURE;
 109   }
 110
 111   return MEMCACHED_SUCCESS;
 112 }
 113
 114 uint64_t memcached_behavior_get(memcached_st *ptr,
 115                                 memcached_behavior flag)
 116 {
 117   memcached_flags temp_flag= 0;
 118
 119   switch (flag)
 120   {
 121   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
 122     temp_flag= MEM_SUPPORT_CAS;
 123     break;
 124   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 125     temp_flag= MEM_USE_CACHE_LOOKUPS;
 126     break;
 127   case MEMCACHED_BEHAVIOR_NO_BLOCK:
 128     temp_flag= MEM_NO_BLOCK;
 129     break;
 130   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
 131     temp_flag= MEM_BUFFER_REQUESTS;
 132     break;
 133   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 134     temp_flag= MEM_TCP_NODELAY;
 135     break;
 136   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 137     temp_flag= MEM_VERIFY_KEY;
 138     break;
 139   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 140     temp_flag= MEM_KETAMA_WEIGHTED;
 141     break;
 142   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 143     return ptr->distribution;
 144   case MEMCACHED_BEHAVIOR_KETAMA:
 145     return (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA) ? 1 : 0;
 146   case MEMCACHED_BEHAVIOR_HASH:
 147     return ptr->hash;
 148   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 149     return ptr->hash_continuum;
 150   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 151     temp_flag= MEM_USE_SORT_HOSTS;
 152     break;
 153   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 154     {
 155       return (unsigned long long)ptr->poll_timeout;
 156     }
 157   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 158     {
 159       return (unsigned long long)ptr->connect_timeout;
 160     }
 161   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 162     {
 163       return (unsigned long long)ptr->retry_timeout;
 164     }
 165   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 166     {
 167       int sock_size;
 168       socklen_t sock_length= sizeof(int);
 169
 170       /* REFACTOR */
 171       /* We just try the first host, and if it is down we return zero */
 172       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 173         return 0;
 174
 175       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 176                      SO_SNDBUF, &sock_size, &sock_length))
 177         return 0; /* Zero means error */
 178
 179       return sock_size;
 180     }
 181   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 182     {
 183       int sock_size;
 184       socklen_t sock_length= sizeof(int);
 185
 186       /* REFACTOR */
 187       /* We just try the first host, and if it is down we return zero */
 188       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 189         return 0;
 190
 191       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 192                      SO_RCVBUF, &sock_size, &sock_length))
 193         return 0; /* Zero means error */
 194
 195       return sock_size;
 196     }
 197   case MEMCACHED_BEHAVIOR_USER_DATA:
 198     return MEMCACHED_FAILURE;
 199   }
 200
 201   WATCHPOINT_ASSERT(temp_flag); /* Programming mistake if it gets this far */
 202   if (ptr->flags & temp_flag)
 203     return 1;
 204   else
 205     return 0;
 206
 207   return MEMCACHED_SUCCESS;
 208 }