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.
15 #include <libmemcached/common.h>
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
.is_shutting_down
= false;
22 self
->number_of_hosts
= 0;
23 self
->cursor_active
= 0;
25 self
->cached_errno
= 0;
27 self
->io_bytes_sent
= 0;
28 self
->server_failure_counter
= 0;
29 self
->weight
= weight
? weight
: 1; // 1 is the default weight value
30 self
->state
.is_corked
= false;
31 self
->state
.is_dead
= false;
32 WATCHPOINT_SET(self
->io_wait_count
.read
= 0);
33 WATCHPOINT_SET(self
->io_wait_count
.write
= 0);
34 self
->major_version
= UINT8_MAX
;
35 self
->micro_version
= UINT8_MAX
;
36 self
->minor_version
= UINT8_MAX
;
38 self
->read_ptr
= self
->read_buffer
;
39 self
->cached_server_error
= NULL
;
40 self
->read_buffer_length
= 0;
41 self
->read_data_length
= 0;
42 self
->write_buffer_offset
= 0;
43 self
->address_info
= NULL
;
44 self
->address_info_next
= NULL
;
48 self
->next_retry
= root
->retry_timeout
;
55 if (self
->weight
> 1 && root
)
57 ((memcached_st
*)root
)->ketama
.weighted
= true;
61 self
->limit_maxbytes
= 0;
68 strncpy(self
->hostname
, hostname
, NI_MAXHOST
- 1);
72 static memcached_server_st
*_server_create(memcached_server_st
*self
, const memcached_st
*memc
)
76 self
= (memcached_server_st
*)libmemcached_malloc(memc
, sizeof(memcached_server_st
));
79 return NULL
; /* MEMCACHED_MEMORY_ALLOCATION_FAILURE */
81 self
->options
.is_allocated
= true;
85 self
->options
.is_allocated
= false;
88 self
->options
.is_initialized
= true;
93 memcached_server_st
*memcached_server_create_with(const memcached_st
*memc
,
94 memcached_server_write_instance_st self
,
95 const char *hostname
, in_port_t port
,
96 uint32_t weight
, memcached_connection_t type
)
98 self
= _server_create(self
, memc
);
103 _server_init(self
, memc
, hostname
, port
, weight
, type
);
106 if (type
== MEMCACHED_CONNECTION_UDP
)
108 self
->write_buffer_offset
= UDP_DATAGRAM_HEADER_LENGTH
;
109 memcached_io_init_udp_header(self
, 0);
115 void memcached_server_free(memcached_server_st
*self
)
117 memcached_quit_server(self
, false);
119 if (self
->cached_server_error
)
120 free(self
->cached_server_error
);
122 if (self
->address_info
)
123 freeaddrinfo(self
->address_info
);
125 if (memcached_is_allocated(self
))
129 libmemcached_free(self
->root
, self
);
138 self
->options
.is_initialized
= false;
143 If we do not have a valid object to clone from, we toss an error.
145 memcached_server_st
*memcached_server_clone(memcached_server_st
*destination
,
146 const memcached_server_st
*source
)
148 /* We just do a normal create if source is missing */
152 destination
= memcached_server_create_with(source
->root
, destination
,
153 source
->hostname
, source
->port
, source
->weight
,
155 if (destination
!= NULL
)
157 destination
->cached_errno
= source
->cached_errno
;
159 if (source
->cached_server_error
)
160 destination
->cached_server_error
= strdup(source
->cached_server_error
);
167 memcached_return_t
memcached_server_cursor(const memcached_st
*ptr
,
168 const memcached_server_fn
*callback
,
170 uint32_t number_of_callbacks
)
172 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
174 memcached_server_instance_st instance
=
175 memcached_server_instance_by_position(ptr
, x
);
177 for (uint32_t y
= 0; y
< number_of_callbacks
; y
++)
179 unsigned int iferror
;
181 iferror
= (*callback
[y
])(ptr
, instance
, context
);
188 return MEMCACHED_SUCCESS
;
191 memcached_return_t
memcached_server_execute(memcached_st
*ptr
,
192 memcached_server_execute_fn callback
,
195 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
197 memcached_server_write_instance_st instance
=
198 memcached_server_instance_fetch(ptr
, x
);
200 unsigned int iferror
;
202 iferror
= (*callback
)(ptr
, instance
, context
);
208 return MEMCACHED_SUCCESS
;
211 memcached_server_instance_st
memcached_server_by_key(const memcached_st
*ptr
,
214 memcached_return_t
*error
)
217 memcached_server_instance_st instance
;
219 *error
= memcached_validate_key_length(key_length
,
220 ptr
->flags
.binary_protocol
);
221 unlikely (*error
!= MEMCACHED_SUCCESS
)
224 unlikely (memcached_server_count(ptr
) == 0)
226 *error
= MEMCACHED_NO_SERVERS
;
230 if (ptr
->flags
.verify_key
&& (memcached_key_test((const char **)&key
, &key_length
, 1) == MEMCACHED_BAD_KEY_PROVIDED
))
232 *error
= MEMCACHED_BAD_KEY_PROVIDED
;
236 server_key
= memcached_generate_hash(ptr
, key
, key_length
);
237 instance
= memcached_server_instance_by_position(ptr
, server_key
);
243 void memcached_server_error_reset(memcached_server_st
*ptr
)
245 ptr
->cached_server_error
[0]= 0;
248 memcached_server_instance_st
memcached_server_get_last_disconnect(const memcached_st
*ptr
)
250 return ptr
->last_disconnected_server
;
253 void memcached_server_list_free(memcached_server_list_st self
)
258 for (uint32_t x
= 0; x
< memcached_server_list_count(self
); x
++)
260 if (self
[x
].address_info
)
262 freeaddrinfo(self
[x
].address_info
);
263 self
[x
].address_info
= NULL
;
267 const memcached_st
*root
= self
->root
;
270 libmemcached_free(root
, self
);
278 uint32_t memcached_servers_set_count(memcached_server_st
*servers
, uint32_t count
)
280 return servers
->number_of_hosts
= count
;
283 uint32_t memcached_server_count(const memcached_st
*self
)
285 return self
->number_of_hosts
;
288 const char *memcached_server_name(memcached_server_instance_st self
)
290 return self
->hostname
;
293 in_port_t
memcached_server_port(memcached_server_instance_st self
)
298 uint32_t memcached_server_response_count(memcached_server_instance_st self
)
300 return self
->cursor_active
;
303 const char *memcached_server_error(memcached_server_instance_st ptr
)
306 ? ptr
->cached_server_error