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

   1 /*
   2   This is a partial implementation for fetching/creating memcached_server_st objects.
   3 */
   4 #include "common.h"
   5
   6 memcached_server_st *memcached_server_create(memcached_st *memc, memcached_server_st *ptr)
   7 {
   8   if (ptr == NULL)
   9   {
  10     ptr= (memcached_server_st *)malloc(sizeof(memcached_server_st));
  11
  12     if (!ptr)
  13       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
  14
  15     memset(ptr, 0, sizeof(memcached_server_st));
  16     ptr->is_allocated= MEMCACHED_ALLOCATED;
  17   }
  18   else
  19   {
  20     ptr->is_allocated= MEMCACHED_USED;
  21     memset(ptr, 0, sizeof(memcached_server_st));
  22   }
  23
  24   ptr->root= memc;
  25
  26   return ptr;
  27 }
  28
  29 void memcached_server_free(memcached_server_st *ptr)
  30 {
  31   WATCHPOINT_NUMBER(ptr->port);
  32   WATCHPOINT_ASSERT(ptr->is_allocated != MEMCACHED_NOT_ALLOCATED);
  33
  34   memcached_quit_server(ptr, 0);
  35
  36   if (ptr->address_info)
  37   {
  38     freeaddrinfo(ptr->address_info);
  39     ptr->address_info= NULL;
  40   }
  41
  42   if (ptr->is_allocated == MEMCACHED_ALLOCATED)
  43   {
  44     if (ptr->root && ptr->root->call_free)
  45       ptr->root->call_free(ptr->root, ptr);
  46     else
  47       free(ptr);
  48   }
  49 }
  50
  51 /*
  52   If we do not have a valid object to clone from, we toss an error.
  53 */
  54 memcached_server_st *memcached_server_clone(memcached_server_st *clone, memcached_server_st *ptr)
  55 {
  56   memcached_server_st *new_clone;
  57
  58   /* We just do a normal create if ptr is missing */
  59   if (ptr == NULL)
  60     return NULL;
  61
  62   if (clone && clone->is_allocated == MEMCACHED_USED)
  63   {
  64     WATCHPOINT_ASSERT(0);
  65     return NULL;
  66   }
  67
  68   new_clone= memcached_server_create(ptr->root, clone);
  69
  70   if (new_clone == NULL)
  71     return NULL;
  72
  73   new_clone->root= ptr->root;
  74
  75   host_reset(new_clone->root, new_clone,
  76              ptr->hostname, ptr->port, ptr->weight,
  77              ptr->type);
  78
  79   return new_clone;
  80 }
  81
  82 memcached_return memcached_server_cursor(memcached_st *ptr,
  83                                          memcached_server_function *callback,
  84                                          void *context,
  85                                          unsigned int number_of_callbacks)
  86 {
  87   unsigned int y;
  88
  89   for (y= 0; y < ptr->number_of_hosts; y++)
  90   {
  91     unsigned int x;
  92
  93     for (x= 0; x < number_of_callbacks; x++)
  94     {
  95       unsigned int iferror;
  96
  97       iferror= (*callback[x])(ptr, &ptr->hosts[y], context);
  98
  99       if (iferror)
 100         continue;
 101     }
 102   }
 103
 104   return MEMCACHED_SUCCESS;
 105 }
 106
 107 memcached_server_st *memcached_server_by_key(memcached_st *ptr,  const char *key, size_t key_length, memcached_return *error)
 108 {
 109   uint32_t server_key;
 110
 111   unlikely (key_length == 0)
 112   {
 113     *error= MEMCACHED_NO_KEY_PROVIDED;
 114     return NULL;
 115   }
 116
 117   unlikely (ptr->number_of_hosts == 0)
 118   {
 119     *error= MEMCACHED_NO_SERVERS;
 120     return NULL;
 121   }
 122
 123   if ((ptr->flags & MEM_VERIFY_KEY) && (memcachd_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
 124   {
 125     *error= MEMCACHED_BAD_KEY_PROVIDED;
 126     return NULL;
 127   }
 128
 129   server_key= memcached_generate_hash(ptr, key, key_length);
 130
 131   return memcached_server_clone(NULL, &ptr->hosts[server_key]);
 132
 133 }