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   host->is_corked= 0;
  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->cached_server_error)
  58     free(ptr->cached_server_error);
  59
  60   if (ptr->address_info)
  61     freeaddrinfo(ptr->address_info);
  62
  63   if (ptr->is_allocated)
  64     ptr->root->call_free(ptr->root, ptr);
  65   else
  66     memset(ptr, 0, sizeof(memcached_server_st));
  67 }
  68
  69 /*
  70   If we do not have a valid object to clone from, we toss an error.
  71 */
  72 memcached_server_st *memcached_server_clone(memcached_server_st *clone, memcached_server_st *ptr)
  73 {
  74   memcached_server_st *rv= NULL;
  75
  76   /* We just do a normal create if ptr is missing */
  77   if (ptr == NULL)
  78     return NULL;
  79
  80   rv = memcached_server_create_with(ptr->root, clone,
  81                                     ptr->hostname, ptr->port, ptr->weight,
  82                                     ptr->type);
  83   if (rv != NULL)
  84   {
  85     rv->cached_errno= ptr->cached_errno;
  86     if (ptr->cached_server_error)
  87       rv->cached_server_error= strdup(ptr->cached_server_error);
  88   }
  89
  90   return rv;
  91
  92 }
  93
  94 memcached_return memcached_server_cursor(memcached_st *ptr,
  95                                          memcached_server_function *callback,
  96                                          void *context,
  97                                          unsigned int number_of_callbacks)
  98 {
  99   unsigned int y;
 100
 101   for (y= 0; y < ptr->number_of_hosts; y++)
 102   {
 103     unsigned int x;
 104
 105     for (x= 0; x < number_of_callbacks; x++)
 106     {
 107       unsigned int iferror;
 108
 109       iferror= (*callback[x])(ptr, &ptr->hosts[y], context);
 110
 111       if (iferror)
 112         continue;
 113     }
 114   }
 115
 116   return MEMCACHED_SUCCESS;
 117 }
 118
 119 memcached_server_st *memcached_server_by_key(memcached_st *ptr,  const char *key, size_t key_length, memcached_return *error)
 120 {
 121   uint32_t server_key;
 122
 123   *error= memcached_validate_key_length(key_length,
 124                                         ptr->flags & MEM_BINARY_PROTOCOL);
 125   unlikely (*error != MEMCACHED_SUCCESS)
 126     return NULL;
 127
 128   unlikely (ptr->number_of_hosts == 0)
 129   {
 130     *error= MEMCACHED_NO_SERVERS;
 131     return NULL;
 132   }
 133
 134   if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test((const char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
 135   {
 136     *error= MEMCACHED_BAD_KEY_PROVIDED;
 137     return NULL;
 138   }
 139
 140   server_key= memcached_generate_hash(ptr, key, key_length);
 141
 142   return memcached_server_clone(NULL, &ptr->hosts[server_key]);
 143
 144 }
 145
 146 const char *memcached_server_error(memcached_server_st *ptr)
 147 {
 148   if (ptr)
 149     return ptr->cached_server_error;
 150   else
 151     return NULL;
 152 }
 153
 154 void memcached_server_error_reset(memcached_server_st *ptr)
 155 {
 156   ptr->cached_server_error[0]= 0;
 157 }
 158
 159 memcached_server_st *memcached_server_get_last_disconnect(memcached_st *ptr)
 160 {
 161   return ptr->last_disconnected_server;
 162 }