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 *)calloc(1, sizeof(memcached_server_st));
  11
  12     if (!ptr)
  13       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
  14
  15     ptr->is_allocated= true;
  16   }
  17   else
  18     memset(ptr, 0, sizeof(memcached_server_st));
  19
  20   ptr->root= memc;
  21
  22   return ptr;
  23 }
  24
  25 memcached_server_st *memcached_server_create_with(memcached_st *memc, memcached_server_st *host,
  26                                                   const char *hostname, unsigned int port,
  27                                                   uint32_t weight, memcached_connection type)
  28 {
  29   host= memcached_server_create(memc, host);
  30
  31   if (host == NULL)
  32     return NULL;
  33
  34   strncpy(host->hostname, hostname, MEMCACHED_MAX_HOST_LENGTH - 1);
  35   host->root= memc ? memc : NULL;
  36   host->port= port;
  37   host->weight= weight;
  38   host->fd= -1;
  39   host->type= type;
  40   host->read_ptr= host->read_buffer;
  41   if (memc)
  42     host->next_retry= memc->retry_timeout;
  43   if (type == MEMCACHED_CONNECTION_UDP)
  44   {
  45     host->write_buffer_offset= UDP_DATAGRAM_HEADER_LENGTH;
  46     memcached_io_init_udp_header(host, 0);
  47   }
  48
  49   return host;
  50 }
  51
  52 void memcached_server_free(memcached_server_st *ptr)
  53 {
  54   memcached_quit_server(ptr, 0);
  55
  56   if (ptr->address_info)
  57   {
  58     freeaddrinfo(ptr->address_info);
  59     ptr->address_info= NULL;
  60   }
  61
  62   if (ptr->is_allocated)
  63     ptr->root->call_free(ptr->root, ptr);
  64   else
  65     memset(ptr, 0, sizeof(memcached_server_st));
  66 }
  67
  68 /*
  69   If we do not have a valid object to clone from, we toss an error.
  70 */
  71 memcached_server_st *memcached_server_clone(memcached_server_st *clone, memcached_server_st *ptr)
  72 {
  73   /* We just do a normal create if ptr is missing */
  74   if (ptr == NULL)
  75     return NULL;
  76
  77   /* TODO We should check return type */
  78   return memcached_server_create_with(ptr->root, clone,
  79                                       ptr->hostname, ptr->port, ptr->weight,
  80                                       ptr->type);
  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   *error= memcached_validate_key_length(key_length,
 113                                         ptr->flags & MEM_BINARY_PROTOCOL);
 114   unlikely (*error != MEMCACHED_SUCCESS)
 115     return NULL;
 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) && (memcached_key_test((const 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 }