1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
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39 This is a partial implementation for fetching/creating memcached_server_st objects.
41 #include <libmemcached/common.h>
43 static inline void _server_init(memcached_server_st
*self
, memcached_st
*root
,
44 const char *hostname
, in_port_t port
,
45 uint32_t weight
, memcached_connection_t type
)
47 self
->options
.is_shutting_down
= false;
48 self
->options
.is_dead
= false;
49 self
->number_of_hosts
= 0;
50 self
->cursor_active
= 0;
53 self
->io_bytes_sent
= 0;
54 self
->server_failure_counter
= 0;
55 self
->weight
= weight
? weight
: 1; // 1 is the default weight value
56 WATCHPOINT_SET(self
->io_wait_count
.read
= 0);
57 WATCHPOINT_SET(self
->io_wait_count
.write
= 0);
58 self
->major_version
= UINT8_MAX
;
59 self
->micro_version
= UINT8_MAX
;
60 self
->minor_version
= UINT8_MAX
;
62 self
->error_messages
= NULL
;
63 self
->read_ptr
= self
->read_buffer
;
64 self
->read_buffer_length
= 0;
65 self
->read_data_length
= 0;
66 self
->write_buffer_offset
= 0;
67 self
->address_info
= NULL
;
68 self
->address_info_next
= NULL
;
70 self
->state
= MEMCACHED_SERVER_STATE_NEW
;
74 self
->next_retry
= root
->retry_timeout
;
82 self
->limit_maxbytes
= 0;
85 strncpy(self
->hostname
, hostname
, NI_MAXHOST
- 1);
93 static memcached_server_st
*_server_create(memcached_server_st
*self
, const memcached_st
*memc
)
97 self
= (memcached_server_st
*)libmemcached_malloc(memc
, sizeof(memcached_server_st
));
100 return NULL
; /* MEMCACHED_MEMORY_ALLOCATION_FAILURE */
102 self
->options
.is_allocated
= true;
106 self
->options
.is_allocated
= false;
109 self
->options
.is_initialized
= true;
114 memcached_server_st
*__server_create_with(const memcached_st
*memc
,
115 memcached_server_write_instance_st self
,
116 const char *hostname
, in_port_t port
,
117 uint32_t weight
, memcached_connection_t type
)
119 self
= _server_create(self
, memc
);
126 _server_init(self
, const_cast<memcached_st
*>(memc
), hostname
, port
, weight
, type
);
129 if (type
== MEMCACHED_CONNECTION_UDP
)
131 self
->write_buffer_offset
= UDP_DATAGRAM_HEADER_LENGTH
;
132 memcached_io_init_udp_header(self
, 0);
138 void __server_free(memcached_server_st
*self
)
140 memcached_quit_server(self
, false);
142 if (self
->address_info
)
144 freeaddrinfo(self
->address_info
);
145 self
->address_info
= NULL
;
148 memcached_error_free(*self
);
150 if (memcached_is_allocated(self
))
152 libmemcached_free(self
->root
, self
);
156 self
->options
.is_initialized
= false;
160 void memcached_server_free(memcached_server_st
*self
)
165 if (memcached_server_list_count(self
))
167 memcached_server_list_free(self
);
175 If we do not have a valid object to clone from, we toss an error.
177 memcached_server_st
*memcached_server_clone(memcached_server_st
*destination
,
178 const memcached_server_st
*source
)
180 /* We just do a normal create if source is missing */
184 destination
= __server_create_with(source
->root
, destination
,
185 source
->hostname
, source
->port
, source
->weight
,
189 if (source
->error_messages
)
191 destination
->error_messages
= memcached_error_copy(*source
);
199 memcached_return_t
memcached_server_cursor(const memcached_st
*ptr
,
200 const memcached_server_fn
*callback
,
202 uint32_t number_of_callbacks
)
204 memcached_return_t rc
;
205 if (memcached_failed(rc
= initialize_const_query(ptr
)))
211 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
213 memcached_server_instance_st instance
=
214 memcached_server_instance_by_position(ptr
, x
);
216 for (uint32_t y
= 0; y
< number_of_callbacks
; y
++)
218 memcached_return_t ret
= (*callback
[y
])(ptr
, instance
, context
);
220 if (memcached_failed(ret
))
228 return errors
? MEMCACHED_SOME_ERRORS
: MEMCACHED_SUCCESS
;
231 memcached_return_t
memcached_server_execute(memcached_st
*ptr
,
232 memcached_server_execute_fn callback
,
235 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
237 memcached_server_write_instance_st instance
= memcached_server_instance_fetch(ptr
, x
);
239 unsigned int iferror
= (*callback
)(ptr
, instance
, context
);
247 return MEMCACHED_SUCCESS
;
250 memcached_server_instance_st
memcached_server_by_key(const memcached_st
*ptr
,
253 memcached_return_t
*error
)
255 memcached_return_t rc
;
256 memcached_return_t unused
;
261 if (memcached_failed(rc
= initialize_const_query(ptr
)))
267 if (memcached_failed(rc
= memcached_validate_key_length(key_length
, ptr
->flags
.binary_protocol
)))
273 if (memcached_failed((memcached_key_test(*ptr
, (const char **)&key
, &key_length
, 1))))
275 *error
= MEMCACHED_BAD_KEY_PROVIDED
;
279 uint32_t server_key
= memcached_generate_hash(ptr
, key
, key_length
);
280 return memcached_server_instance_by_position(ptr
, server_key
);
284 void memcached_server_error_reset(memcached_server_st
*self
)
286 WATCHPOINT_ASSERT(self
);
292 memcached_error_free(*self
);
295 memcached_server_instance_st
memcached_server_get_last_disconnect(const memcached_st
*self
)
297 WATCHPOINT_ASSERT(self
);
301 return self
->last_disconnected_server
;
304 uint32_t memcached_servers_set_count(memcached_server_st
*servers
, uint32_t count
)
306 WATCHPOINT_ASSERT(servers
);
310 return servers
->number_of_hosts
= count
;
313 uint32_t memcached_server_count(const memcached_st
*self
)
315 WATCHPOINT_ASSERT(self
);
319 return self
->number_of_hosts
;
322 const char *memcached_server_name(const memcached_server_instance_st self
)
324 WATCHPOINT_ASSERT(self
);
328 return self
->hostname
;
331 in_port_t
memcached_server_port(const memcached_server_instance_st self
)
333 WATCHPOINT_ASSERT(self
);
340 uint32_t memcached_server_response_count(const memcached_server_instance_st self
)
342 WATCHPOINT_ASSERT(self
);
346 return self
->cursor_active
;
349 const char *memcached_server_type(const memcached_server_instance_st ptr
)
355 case MEMCACHED_CONNECTION_TCP
:
358 case MEMCACHED_CONNECTION_UDP
:
361 case MEMCACHED_CONNECTION_UNIX_SOCKET
: