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   {
  64     if (ptr->root && ptr->root->call_free)
  65       ptr->root->call_free(ptr->root, ptr);
  66     else
  67       free(ptr);
  68   }
  69   else
  70     memset(ptr, 0, sizeof(memcached_server_st));
  71 }
  72
  73 /*
  74   If we do not have a valid object to clone from, we toss an error.
  75 */
  76 memcached_server_st *memcached_server_clone(memcached_server_st *clone, memcached_server_st *ptr)
  77 {
  78   /* We just do a normal create if ptr is missing */
  79   if (ptr == NULL)
  80     return NULL;
  81
  82   /* TODO We should check return type */
  83   return memcached_server_create_with(ptr->root, clone,
  84                                       ptr->hostname, ptr->port, ptr->weight,
  85                                       ptr->type);
  86 }
  87
  88 memcached_return memcached_server_cursor(memcached_st *ptr,
  89                                          memcached_server_function *callback,
  90                                          void *context,
  91                                          unsigned int number_of_callbacks)
  92 {
  93   unsigned int y;
  94
  95   for (y= 0; y < ptr->number_of_hosts; y++)
  96   {
  97     unsigned int x;
  98
  99     for (x= 0; x < number_of_callbacks; x++)
 100     {
 101       unsigned int iferror;
 102
 103       iferror= (*callback[x])(ptr, &ptr->hosts[y], context);
 104
 105       if (iferror)
 106         continue;
 107     }
 108   }
 109
 110   return MEMCACHED_SUCCESS;
 111 }
 112
 113 memcached_server_st *memcached_server_by_key(memcached_st *ptr,  const char *key, size_t key_length, memcached_return *error)
 114 {
 115   uint32_t server_key;
 116
 117   *error= memcached_validate_key_length(key_length,
 118                                         ptr->flags & MEM_BINARY_PROTOCOL);
 119   unlikely (*error != MEMCACHED_SUCCESS)
 120     return NULL;
 121
 122   unlikely (ptr->number_of_hosts == 0)
 123   {
 124     *error= MEMCACHED_NO_SERVERS;
 125     return NULL;
 126   }
 127
 128   if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
 129   {
 130     *error= MEMCACHED_BAD_KEY_PROVIDED;
 131     return NULL;
 132   }
 133
 134   server_key= memcached_generate_hash(ptr, key, key_length);
 135
 136   return memcached_server_clone(NULL, &ptr->hosts[server_key]);
 137
 138 }