git.m6w6.name Git - awesomized/libmemcached/blob - lib/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, void *data)
  13 {
  14   unsigned int *truefalse= (unsigned int *)data;
  15
  16   memcached_quit(ptr);
  17   if (truefalse)
  18     ptr->flags|= temp_flag;
  19   else
  20     ptr->flags+= temp_flag;
  21 }
  22
  23 memcached_return memcached_behavior_set(memcached_st *ptr,
  24                                         memcached_behavior flag,
  25                                         void *data)
  26 {
  27   switch (flag)
  28   {
  29   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  30     set_behavior_flag(ptr, MEM_SUPPORT_CAS, data);
  31     break;
  32   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  33     set_behavior_flag(ptr, MEM_NO_BLOCK, data);
  34     break;
  35   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
  36     set_behavior_flag(ptr, MEM_TCP_NODELAY, data);
  37     break;
  38   case MEMCACHED_BEHAVIOR_HASH:
  39     ptr->hash= *(memcached_hash *)(data);
  40     break;
  41   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
  42     set_behavior_flag(ptr, MEM_USE_CACHE_LOOKUPS, data);
  43     break;
  44   case MEMCACHED_BEHAVIOR_KETAMA:
  45     set_behavior_flag(ptr, MEM_USE_KETAMA, data);
  46     break;
  47   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
  48     {
  49       ptr->send_size= (*((int *)data));
  50       memcached_quit(ptr);
  51       break;
  52     }
  53   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
  54     {
  55       ptr->recv_size= (*((int *)data));
  56       memcached_quit(ptr);
  57       break;
  58     }
  59
  60
  61   }
  62
  63   return MEMCACHED_SUCCESS;
  64 }
  65
  66 unsigned long long memcached_behavior_get(memcached_st *ptr,
  67                                           memcached_behavior flag)
  68 {
  69   memcached_flags temp_flag= 0;
  70
  71   switch (flag)
  72   {
  73   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  74     temp_flag= MEM_SUPPORT_CAS;
  75     break;
  76   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
  77     temp_flag= MEM_USE_CACHE_LOOKUPS;
  78     break;
  79   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  80     temp_flag= MEM_NO_BLOCK;
  81     break;
  82   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
  83     temp_flag= MEM_TCP_NODELAY;
  84     break;
  85   case MEMCACHED_BEHAVIOR_HASH:
  86     return ptr->hash;
  87   case MEMCACHED_BEHAVIOR_KETAMA:
  88     temp_flag= MEM_USE_KETAMA;
  89     break;
  90   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
  91     {
  92       int sock_size;
  93       socklen_t sock_length= sizeof(int);
  94
  95       /* We just try the first host, and if it is down we return zero */
  96       if ((memcached_connect(ptr, 0)) != MEMCACHED_SUCCESS)
  97         return 0;
  98
  99       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 100                      SO_SNDBUF, &sock_size, &sock_length))
 101         return 0; /* Zero means error */
 102
 103       return sock_size;
 104     }
 105   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 106     {
 107       int sock_size;
 108       socklen_t sock_length= sizeof(int);
 109
 110       /* We just try the first host, and if it is down we return zero */
 111       if ((memcached_connect(ptr, 0)) != MEMCACHED_SUCCESS)
 112         return 0;
 113
 114       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 115                      SO_RCVBUF, &sock_size, &sock_length))
 116         return 0; /* Zero means error */
 117
 118       return sock_size;
 119     }
 120   }
 121
 122   WATCHPOINT_ASSERT(temp_flag); /* Programming mistake if it gets this far */
 123   if (ptr->flags & temp_flag)
 124     return 1;
 125   else
 126     return 0;
 127
 128   return MEMCACHED_SUCCESS;
 129 }