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
->options
.is_dead
= 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;
30 self
->weight
= weight
? weight
: 1; // 1 is the default weight value
31 WATCHPOINT_SET(self
->io_wait_count
.read
= 0);
32 WATCHPOINT_SET(self
->io_wait_count
.write
= 0);
33 self
->major_version
= UINT8_MAX
;
34 self
->micro_version
= UINT8_MAX
;
35 self
->minor_version
= UINT8_MAX
;
37 self
->read_ptr
= self
->read_buffer
;
38 self
->cached_server_error
= NULL
;
39 self
->read_buffer_length
= 0;
40 self
->read_data_length
= 0;
41 self
->write_buffer_offset
= 0;
42 self
->address_info
= NULL
;
43 self
->address_info_next
= NULL
;
47 self
->next_retry
= root
->retry_timeout
;
54 if (self
->weight
> 1 && root
)
56 ((memcached_st
*)root
)->ketama
.weighted
= true;
60 self
->limit_maxbytes
= 0;
67 strncpy(self
->hostname
, hostname
, NI_MAXHOST
- 1);
71 static memcached_server_st
*_server_create(memcached_server_st
*self
, const memcached_st
*memc
)
75 self
= (memcached_server_st
*)libmemcached_malloc(memc
, sizeof(memcached_server_st
));
78 return NULL
; /* MEMCACHED_MEMORY_ALLOCATION_FAILURE */
80 self
->options
.is_allocated
= true;
84 self
->options
.is_allocated
= false;
87 self
->options
.is_initialized
= true;
92 memcached_server_st
*memcached_server_create_with(const memcached_st
*memc
,
93 memcached_server_write_instance_st self
,
94 const char *hostname
, in_port_t port
,
95 uint32_t weight
, memcached_connection_t type
)
97 self
= _server_create(self
, memc
);
102 _server_init(self
, memc
, hostname
, port
, weight
, type
);
105 if (type
== MEMCACHED_CONNECTION_UDP
)
107 self
->write_buffer_offset
= UDP_DATAGRAM_HEADER_LENGTH
;
108 memcached_io_init_udp_header(self
, 0);
114 void memcached_server_free(memcached_server_st
*self
)
116 memcached_quit_server(self
, false);
118 if (self
->cached_server_error
)
119 free(self
->cached_server_error
);
121 if (self
->address_info
)
122 freeaddrinfo(self
->address_info
);
124 if (memcached_is_allocated(self
))
128 libmemcached_free(self
->root
, self
);
137 self
->options
.is_initialized
= false;
142 If we do not have a valid object to clone from, we toss an error.
144 memcached_server_st
*memcached_server_clone(memcached_server_st
*destination
,
145 const memcached_server_st
*source
)
147 /* We just do a normal create if source is missing */
151 destination
= memcached_server_create_with(source
->root
, destination
,
152 source
->hostname
, source
->port
, source
->weight
,
154 if (destination
!= NULL
)
156 destination
->cached_errno
= source
->cached_errno
;
158 if (source
->cached_server_error
)
159 destination
->cached_server_error
= strdup(source
->cached_server_error
);
166 memcached_return_t
memcached_server_cursor(const memcached_st
*ptr
,
167 const memcached_server_fn
*callback
,
169 uint32_t number_of_callbacks
)
171 memcached_return_t rc
;
172 if ((rc
= initialize_const_query(ptr
)) != MEMCACHED_SUCCESS
)
177 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
179 memcached_server_instance_st instance
=
180 memcached_server_instance_by_position(ptr
, x
);
182 for (uint32_t y
= 0; y
< number_of_callbacks
; y
++)
184 unsigned int iferror
;
186 iferror
= (*callback
[y
])(ptr
, instance
, context
);
193 return MEMCACHED_SUCCESS
;
196 memcached_return_t
memcached_server_execute(memcached_st
*ptr
,
197 memcached_server_execute_fn callback
,
200 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
202 memcached_server_write_instance_st instance
=
203 memcached_server_instance_fetch(ptr
, x
);
205 unsigned int iferror
;
207 iferror
= (*callback
)(ptr
, instance
, context
);
213 return MEMCACHED_SUCCESS
;
216 memcached_server_instance_st
memcached_server_by_key(const memcached_st
*ptr
,
219 memcached_return_t
*error
)
221 memcached_return_t rc
;
222 if (memcached_failed(rc
= initialize_const_query(ptr
)))
230 if (memcached_failed(rc
= memcached_validate_key_length(key_length
, ptr
->flags
.binary_protocol
)))
238 if (ptr
->flags
.verify_key
&& (memcached_key_test((const char **)&key
, &key_length
, 1) == MEMCACHED_BAD_KEY_PROVIDED
))
241 *error
= MEMCACHED_BAD_KEY_PROVIDED
;
245 uint32_t server_key
= memcached_generate_hash(ptr
, key
, key_length
);
246 return memcached_server_instance_by_position(ptr
, server_key
);
250 void memcached_server_error_reset(memcached_server_st
*self
)
252 WATCHPOINT_ASSERT(self
);
256 self
->cached_server_error
[0]= 0;
259 memcached_server_instance_st
memcached_server_get_last_disconnect(const memcached_st
*self
)
261 WATCHPOINT_ASSERT(self
);
265 return self
->last_disconnected_server
;
268 void memcached_server_list_free(memcached_server_list_st self
)
273 for (uint32_t x
= 0; x
< memcached_server_list_count(self
); x
++)
275 if (self
[x
].address_info
)
277 freeaddrinfo(self
[x
].address_info
);
278 self
[x
].address_info
= NULL
;
282 const memcached_st
*root
= self
->root
;
285 libmemcached_free(root
, self
);
293 uint32_t memcached_servers_set_count(memcached_server_st
*servers
, uint32_t count
)
295 WATCHPOINT_ASSERT(servers
);
299 return servers
->number_of_hosts
= count
;
302 uint32_t memcached_server_count(const memcached_st
*self
)
304 WATCHPOINT_ASSERT(self
);
308 return self
->number_of_hosts
;
311 const char *memcached_server_name(memcached_server_instance_st self
)
313 WATCHPOINT_ASSERT(self
);
317 return self
->hostname
;
320 in_port_t
memcached_server_port(memcached_server_instance_st self
)
322 WATCHPOINT_ASSERT(self
);
329 uint32_t memcached_server_response_count(memcached_server_instance_st self
)
331 WATCHPOINT_ASSERT(self
);
335 return self
->cursor_active
;
338 const char *memcached_server_error(memcached_server_instance_st ptr
)
340 return ptr
? ptr
->cached_server_error
: NULL
;