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