2 * Copyright (C) 2006-2009 Brian Aker
5 * Use and distribution licensed under the BSD license. See
6 * the COPYING file in the parent directory for full text.
8 * Summary: String structure used for libmemcached.
13 This is a partial implementation for fetching/creating memcached_server_st objects.
17 static inline void _server_init(memcached_server_st
*self
, const memcached_st
*root
,
18 const char *hostname
, in_port_t port
,
19 uint32_t weight
, memcached_connection_t type
)
21 self
->options
.sockaddr_inited
= false;
22 self
->options
.is_shutting_down
= false;
23 self
->number_of_hosts
= 0;
24 self
->cursor_active
= 0;
26 self
->cached_errno
= 0;
28 self
->io_bytes_sent
= 0;
29 self
->server_failure_counter
= 0;
31 self
->state
.is_corked
= false;
32 self
->major_version
= 0;
33 self
->micro_version
= 0;
34 self
->minor_version
= 0;
36 self
->read_ptr
= self
->read_buffer
;
37 self
->cached_server_error
= NULL
;
38 self
->read_buffer_length
= 0;
39 self
->read_data_length
= 0;
40 self
->write_buffer_offset
= 0;
41 self
->address_info
= NULL
;
45 self
->next_retry
= root
->retry_timeout
;
53 self
->limit_maxbytes
= 0;
57 strncpy(self
->hostname
, hostname
, NI_MAXHOST
- 1);
60 static memcached_server_st
*_server_create(memcached_server_st
*self
, const memcached_st
*memc
)
64 self
= (memcached_server_st
*)libmemcached_malloc(memc
, sizeof(memcached_server_st
));
67 return NULL
; /* MEMCACHED_MEMORY_ALLOCATION_FAILURE */
69 self
->options
.is_allocated
= true;
73 self
->options
.is_allocated
= false;
76 self
->options
.is_initialized
= true;
81 memcached_server_st
*memcached_server_create_with(const memcached_st
*memc
, memcached_server_st
*self
,
82 const char *hostname
, in_port_t port
,
83 uint32_t weight
, memcached_connection_t type
)
85 self
= _server_create(self
, memc
);
90 _server_init(self
, memc
, hostname
, port
, weight
, type
);
93 if (type
== MEMCACHED_CONNECTION_UDP
)
95 self
->write_buffer_offset
= UDP_DATAGRAM_HEADER_LENGTH
;
96 memcached_io_init_udp_header(self
, 0);
102 void memcached_server_free(memcached_server_st
*self
)
104 memcached_quit_server(self
, false);
106 if (self
->cached_server_error
)
107 free(self
->cached_server_error
);
109 if (self
->address_info
)
110 freeaddrinfo(self
->address_info
);
112 if (memcached_is_allocated(self
))
114 libmemcached_free(self
->root
, self
);
118 self
->options
.is_initialized
= false;
123 If we do not have a valid object to clone from, we toss an error.
125 memcached_server_st
*memcached_server_clone(memcached_server_st
*destination
,
126 const memcached_server_st
*source
)
128 /* We just do a normal create if source is missing */
132 destination
= memcached_server_create_with(source
->root
, destination
,
133 source
->hostname
, source
->port
, source
->weight
,
135 if (destination
!= NULL
)
137 destination
->cached_errno
= source
->cached_errno
;
139 if (source
->cached_server_error
)
140 destination
->cached_server_error
= strdup(source
->cached_server_error
);
147 memcached_return_t
memcached_server_cursor(memcached_st
*ptr
,
148 memcached_server_fn
*callback
,
150 uint32_t number_of_callbacks
)
154 for (y
= 0; y
< memcached_server_count(ptr
); y
++)
157 memcached_server_instance_st
*instance
=
158 memcached_server_instance_fetch(ptr
, y
);
160 for (x
= 0; x
< number_of_callbacks
; x
++)
162 unsigned int iferror
;
164 iferror
= (*callback
[x
])(ptr
, instance
, context
);
171 return MEMCACHED_SUCCESS
;
174 memcached_server_st
*memcached_server_by_key(memcached_st
*ptr
, const char *key
, size_t key_length
, memcached_return_t
*error
)
177 memcached_server_instance_st
*instance
;
179 *error
= memcached_validate_key_length(key_length
,
180 ptr
->flags
.binary_protocol
);
181 unlikely (*error
!= MEMCACHED_SUCCESS
)
184 unlikely (memcached_server_count(ptr
) == 0)
186 *error
= MEMCACHED_NO_SERVERS
;
190 if (ptr
->flags
.verify_key
&& (memcached_key_test((const char **)&key
, &key_length
, 1) == MEMCACHED_BAD_KEY_PROVIDED
))
192 *error
= MEMCACHED_BAD_KEY_PROVIDED
;
196 server_key
= memcached_generate_hash(ptr
, key
, key_length
);
197 instance
= memcached_server_instance_fetch(ptr
, server_key
);
199 return memcached_server_clone(NULL
, instance
);
203 const char *memcached_server_error(memcached_server_st
*ptr
)
206 ? ptr
->cached_server_error
210 void memcached_server_error_reset(memcached_server_st
*ptr
)
212 ptr
->cached_server_error
[0]= 0;
215 memcached_server_st
*memcached_server_get_last_disconnect(memcached_st
*ptr
)
217 return ptr
->last_disconnected_server
;
220 uint32_t memcached_server_list_count(memcached_server_st
*ptr
)
224 : memcached_servers_count(ptr
);
227 void memcached_server_list_free(memcached_server_st
*ptr
)
229 server_list_free(NULL
, ptr
);
233 @todo allow lists to query themselves even if they lack a root
235 memcached_return_t
memcached_server_remove(memcached_server_st
*st_ptr
)
237 uint32_t x
, host_index
;
238 memcached_st
*root
= (memcached_st
*)st_ptr
->root
;
239 memcached_server_st
*list
;
242 return MEMCACHED_FAILURE
;
244 list
= memcached_server_list(root
);
246 for (x
= 0, host_index
= 0; x
< memcached_server_count(root
); x
++)
248 if (strncmp(list
[x
].hostname
, st_ptr
->hostname
, NI_MAXHOST
) != 0 || list
[x
].port
!= st_ptr
->port
)
251 memcpy(list
+host_index
, list
+x
, sizeof(memcached_server_st
));
255 root
->number_of_hosts
= host_index
;
257 if (st_ptr
->address_info
)
259 freeaddrinfo(st_ptr
->address_info
);
260 st_ptr
->address_info
= NULL
;
262 run_distribution(root
);
264 return MEMCACHED_SUCCESS
;
268 inline uint32_t memcached_servers_count(memcached_server_st
*servers
)
270 return servers
->number_of_hosts
;
274 inline uint32_t memcached_servers_set_count(memcached_server_st
*servers
, uint32_t count
)
276 return servers
->number_of_hosts
= count
;