git.m6w6.name Git - awesomized/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     memset(ptr, 0, sizeof(memcached_server_st));
  21   }
  22
  23   ptr->root= memc;
  24
  25   return ptr;
  26 }
  27
  28 void memcached_server_free(memcached_server_st *ptr)
  29 {
  30   memcached_return rc;
  31   WATCHPOINT_ASSERT(ptr->is_allocated != MEMCACHED_NOT_ALLOCATED);
  32
  33   memcached_quit_server(ptr, 0);
  34
  35   if (ptr->address_info)
  36   {
  37     freeaddrinfo(ptr->address_info);
  38     ptr->address_info= NULL;
  39   }
  40
  41   if (ptr->is_allocated == MEMCACHED_ALLOCATED)
  42   {
  43     if (ptr->root && ptr->root->call_free)
  44       ptr->root->call_free(ptr->root, ptr);
  45     else
  46       free(ptr);
  47   }
  48   else
  49     ptr->is_allocated= MEMCACHED_USED;
  50 }
  51
  52 /*
  53   If we do not have a valid object to clone from, we toss an error.
  54 */
  55 memcached_server_st *memcached_server_clone(memcached_server_st *clone, memcached_server_st *ptr)
  56 {
  57   memcached_server_st *new_clone;
  58
  59   /* We just do a normal create if ptr is missing */
  60   if (ptr == NULL)
  61     return NULL;
  62
  63   if (clone && clone->is_allocated == MEMCACHED_USED)
  64   {
  65     WATCHPOINT_ASSERT(0);
  66     return NULL;
  67   }
  68
  69   new_clone= memcached_server_create(ptr->root, clone);
  70
  71   if (new_clone == NULL)
  72     return NULL;
  73
  74   new_clone->root= ptr->root;
  75
  76   host_reset(new_clone->root, new_clone,
  77              ptr->hostname, ptr->port, ptr->weight,
  78              ptr->type);
  79
  80   return new_clone;
  81 }
  82
  83 memcached_return memcached_server_cursor(memcached_st *ptr,
  84                                          memcached_server_function *callback,
  85                                          void *context,
  86                                          unsigned int number_of_callbacks)
  87 {
  88   unsigned int y;
  89
  90   for (y= 0; y < ptr->number_of_hosts; y++)
  91   {
  92     unsigned int x;
  93
  94     for (x= 0; x < number_of_callbacks; x++)
  95     {
  96       unsigned int iferror;
  97
  98       iferror= (*callback[x])(ptr, &ptr->hosts[y], context);
  99
 100       if (iferror)
 101         continue;
 102     }
 103   }
 104
 105   return MEMCACHED_SUCCESS;
 106 }
 107
 108 memcached_server_st *memcached_server_by_key(memcached_st *ptr,  const char *key, size_t key_length, memcached_return *error)
 109 {
 110   uint32_t server_key;
 111
 112   unlikely (key_length == 0)
 113   {
 114     *error= MEMCACHED_NO_KEY_PROVIDED;
 115     return NULL;
 116   }
 117
 118   unlikely (ptr->number_of_hosts == 0)
 119   {
 120     *error= MEMCACHED_NO_SERVERS;
 121     return NULL;
 122   }
 123
 124   if ((ptr->flags & MEM_VERIFY_KEY) && (memcachd_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
 125   {
 126     *error= MEMCACHED_BAD_KEY_PROVIDED;
 127     return NULL;
 128   }
 129
 130   server_key= memcached_generate_hash(ptr, key, key_length);
 131
 132   return memcached_server_clone(NULL, &ptr->hosts[server_key]);
 133
 134 }