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= true;
  17   }
  18   else
  19     memset(ptr, 0, sizeof(memcached_server_st));
  20
  21   ptr->root= memc;
  22
  23   return ptr;
  24 }
  25
  26 memcached_server_st *memcached_server_create_with(memcached_st *memc, memcached_server_st *host,
  27                                                   const char *hostname, unsigned int port,
  28                                                   uint32_t weight, memcached_connection type)
  29 {
  30   host= memcached_server_create(memc, host);
  31
  32   if (host == NULL)
  33     return NULL;
  34
  35   strncpy(host->hostname, hostname, MEMCACHED_MAX_HOST_LENGTH - 1);
  36   host->root= memc ? memc : NULL;
  37   host->port= port;
  38   host->weight= weight;
  39   host->fd= -1;
  40   host->type= type;
  41   host->read_ptr= host->read_buffer;
  42   if (memc)
  43     host->next_retry= memc->retry_timeout;
  44   if (type == MEMCACHED_CONNECTION_UDP)
  45   {
  46     host->write_buffer_offset= UDP_DATAGRAM_HEADER_LENGTH;
  47     memcached_io_init_udp_header(host, 0);
  48   }
  49
  50   return host;
  51 }
  52
  53 void memcached_server_free(memcached_server_st *ptr)
  54 {
  55   memcached_quit_server(ptr, 0);
  56
  57   if (ptr->address_info)
  58   {
  59     freeaddrinfo(ptr->address_info);
  60     ptr->address_info= NULL;
  61   }
  62
  63   if (ptr->is_allocated)
  64   {
  65     if (ptr->root && ptr->root->call_free)
  66       ptr->root->call_free(ptr->root, ptr);
  67     else
  68       free(ptr);
  69   }
  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   /* We just do a normal create if ptr is missing */
  80   if (ptr == NULL)
  81     return NULL;
  82
  83   /* TODO We should check return type */
  84   return memcached_server_create_with(ptr->root, clone,
  85                                       ptr->hostname, ptr->port, ptr->weight,
  86                                       ptr->type);
  87 }
  88
  89 memcached_return memcached_server_cursor(memcached_st *ptr,
  90                                          memcached_server_function *callback,
  91                                          void *context,
  92                                          unsigned int number_of_callbacks)
  93 {
  94   unsigned int y;
  95
  96   for (y= 0; y < ptr->number_of_hosts; y++)
  97   {
  98     unsigned int x;
  99
 100     for (x= 0; x < number_of_callbacks; x++)
 101     {
 102       unsigned int iferror;
 103
 104       iferror= (*callback[x])(ptr, &ptr->hosts[y], context);
 105
 106       if (iferror)
 107         continue;
 108     }
 109   }
 110
 111   return MEMCACHED_SUCCESS;
 112 }
 113
 114 memcached_server_st *memcached_server_by_key(memcached_st *ptr,  const char *key, size_t key_length, memcached_return *error)
 115 {
 116   uint32_t server_key;
 117
 118   *error= memcached_validate_key_length(key_length,
 119                                         ptr->flags & MEM_BINARY_PROTOCOL);
 120   unlikely (*error != MEMCACHED_SUCCESS)
 121     return NULL;
 122
 123   unlikely (ptr->number_of_hosts == 0)
 124   {
 125     *error= MEMCACHED_NO_SERVERS;
 126     return NULL;
 127   }
 128
 129   if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
 130   {
 131     *error= MEMCACHED_BAD_KEY_PROVIDED;
 132     return NULL;
 133   }
 134
 135   server_key= memcached_generate_hash(ptr, key, key_length);
 136
 137   return memcached_server_clone(NULL, &ptr->hosts[server_key]);
 138
 139 }