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->cached_server_error)
  57   {
  58     free(ptr->cached_server_error);
  59     ptr->cached_server_error= NULL;
  60   }
  61
  62   if (ptr->address_info)
  63   {
  64     freeaddrinfo(ptr->address_info);
  65     ptr->address_info= NULL;
  66   }
  67
  68   if (ptr->is_allocated)
  69     ptr->root->call_free(ptr->root, ptr);
  70   else
  71     memset(ptr, 0, sizeof(memcached_server_st));
  72 }
  73
  74 /*
  75   If we do not have a valid object to clone from, we toss an error.
  76 */
  77 memcached_server_st *memcached_server_clone(memcached_server_st *clone, memcached_server_st *ptr)
  78 {
  79   memcached_server_st *rv = NULL;
  80
  81   /* We just do a normal create if ptr is missing */
  82   if (ptr == NULL)
  83     return NULL;
  84
  85   rv = memcached_server_create_with(ptr->root, clone,
  86                                     ptr->hostname, ptr->port, ptr->weight,
  87                                     ptr->type);
  88   if (rv != NULL)
  89   {
  90     rv->cached_errno= ptr->cached_errno;
  91     if (ptr->cached_server_error)
  92       rv->cached_server_error= strdup(ptr->cached_server_error);
  93   }
  94
  95   return rv;
  96
  97 }
  98
  99 memcached_return memcached_server_cursor(memcached_st *ptr,
 100                                          memcached_server_function *callback,
 101                                          void *context,
 102                                          unsigned int number_of_callbacks)
 103 {
 104   unsigned int y;
 105
 106   for (y= 0; y < ptr->number_of_hosts; y++)
 107   {
 108     unsigned int x;
 109
 110     for (x= 0; x < number_of_callbacks; x++)
 111     {
 112       unsigned int iferror;
 113
 114       iferror= (*callback[x])(ptr, &ptr->hosts[y], context);
 115
 116       if (iferror)
 117         continue;
 118     }
 119   }
 120
 121   return MEMCACHED_SUCCESS;
 122 }
 123
 124 memcached_server_st *memcached_server_by_key(memcached_st *ptr,  const char *key, size_t key_length, memcached_return *error)
 125 {
 126   uint32_t server_key;
 127
 128   *error= memcached_validate_key_length(key_length,
 129                                         ptr->flags & MEM_BINARY_PROTOCOL);
 130   unlikely (*error != MEMCACHED_SUCCESS)
 131     return NULL;
 132
 133   unlikely (ptr->number_of_hosts == 0)
 134   {
 135     *error= MEMCACHED_NO_SERVERS;
 136     return NULL;
 137   }
 138
 139   if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
 140   {
 141     *error= MEMCACHED_BAD_KEY_PROVIDED;
 142     return NULL;
 143   }
 144
 145   server_key= memcached_generate_hash(ptr, key, key_length);
 146
 147   return memcached_server_clone(NULL, &ptr->hosts[server_key]);
 148
 149 }