2 +--------------------------------------------------------------------+
3 | libmemcached - C/C++ Client Library for memcached |
4 +--------------------------------------------------------------------+
5 | Redistribution and use in source and binary forms, with or without |
6 | modification, are permitted under the terms of the BSD license. |
7 | You should have received a copy of the license in a bundled file |
8 | named LICENSE; in case you did not receive a copy you can review |
9 | the terms online at: https://opensource.org/licenses/BSD-3-Clause |
10 +--------------------------------------------------------------------+
11 | Copyright (c) 2006-2014 Brian Aker https://datadifferential.com/ |
12 | Copyright (c) 2020 Michael Wallner <mike@php.net> |
13 +--------------------------------------------------------------------+
16 #include "libmemcached/common.h"
17 #include "p9y/socket.hpp"
19 static inline void _server_init(memcached_instance_st
*self
, Memcached
*root
,
20 const memcached_string_t
&hostname
, in_port_t port
, uint32_t weight
,
21 memcached_connection_t type
) {
22 self
->options
.is_shutting_down
= false;
23 self
->options
.is_dead
= false;
24 self
->options
.ready
= false;
27 self
->cursor_active_
= 0;
29 self
->fd
= INVALID_SOCKET
;
30 self
->io_bytes_sent
= 0;
32 self
->server_failure_counter
= 0;
33 self
->server_failure_counter_query_id
= 0;
34 self
->server_timeout_counter
= 0;
35 self
->server_timeout_counter_query_id
= 0;
36 self
->weight
= weight
? weight
: 1; // 1 is the default weight value
37 self
->io_wait_count
.read
= 0;
38 self
->io_wait_count
.write
= 0;
39 self
->io_wait_count
.timeouts
= 0;
40 self
->io_wait_count
._bytes_read
= 0;
41 self
->major_version
= UINT8_MAX
;
42 self
->micro_version
= UINT8_MAX
;
43 self
->minor_version
= UINT8_MAX
;
45 self
->error_messages
= NULL
;
46 self
->read_ptr
= self
->read_buffer
;
47 self
->read_buffer_length
= 0;
48 self
->write_buffer_offset
= 0;
49 self
->address_info
= NULL
;
50 self
->address_info_next
= NULL
;
52 self
->state
= MEMCACHED_SERVER_STATE_NEW
;
57 self
->version
= ++root
->server_info
.version
;
59 self
->version
= UINT_MAX
;
61 self
->limit_maxbytes
= 0;
62 self
->hostname(hostname
);
65 static memcached_instance_st
*_server_create(memcached_instance_st
*self
,
66 const memcached_st
*memc
) {
68 self
= libmemcached_xmalloc(memc
, memcached_instance_st
);
71 return NULL
; /* MEMCACHED_MEMORY_ALLOCATION_FAILURE */
74 self
->options
.is_allocated
= true;
76 self
->options
.is_allocated
= false;
79 self
->options
.is_initialized
= true;
84 void memcached_instance_st::events(short arg
) {
85 if ((_events
| arg
) == _events
) {
92 void memcached_instance_st::revents(short arg
) {
98 _events
&= short(~arg
);
101 memcached_instance_st
*__instance_create_with(memcached_st
*memc
, memcached_instance_st
*self
,
102 const memcached_string_t
&hostname
,
103 const in_port_t port
, uint32_t weight
,
104 const memcached_connection_t type
) {
105 if (memcached_is_valid_servername(hostname
) == false) {
106 memcached_set_error(*memc
, MEMCACHED_INVALID_ARGUMENTS
, MEMCACHED_AT
,
107 memcached_literal_param("Invalid hostname provided"));
111 self
= _server_create(self
, memc
);
117 _server_init(self
, const_cast<memcached_st
*>(memc
), hostname
, port
, weight
, type
);
119 if (memc
and memcached_is_udp(memc
)) {
120 self
->write_buffer_offset
= UDP_DATAGRAM_HEADER_LENGTH
;
121 memcached_io_init_udp_header(self
, 0);
127 void __instance_free(memcached_instance_st
*self
) {
128 memcached_quit_server(self
, false);
130 self
->clear_addrinfo();
131 assert(self
->address_info_next
== NULL
);
133 memcached_error_free(*self
);
135 if (memcached_is_allocated(self
)) {
136 libmemcached_free(self
->root
, self
);
138 self
->options
.is_initialized
= false;
142 void memcached_instance_free(memcached_instance_st
*self
) {
144 __instance_free(self
);
148 memcached_return_t
memcached_server_cursor(const memcached_st
*shell
,
149 const memcached_server_fn
*callback
, void *context
,
150 uint32_t number_of_callbacks
) {
151 const Memcached
*memc
= memcached2Memcached(shell
);
152 memcached_return_t rc
;
153 if (memcached_failed(rc
= initialize_const_query(memc
))) {
158 for (uint32_t x
= 0; x
< memcached_instance_list_count(memc
); x
++) {
159 memcached_instance_st
*instance
= memcached_instance_by_position(memc
, x
);
161 for (uint32_t y
= 0; y
< number_of_callbacks
; y
++) {
162 memcached_return_t ret
= (*callback
[y
])(memc
, instance
, context
);
164 if (memcached_failed(ret
)) {
171 return errors
? MEMCACHED_SOME_ERRORS
: MEMCACHED_SUCCESS
;
174 memcached_return_t
memcached_server_execute(memcached_st
*memc
,
175 memcached_server_execute_fn callback
, void *context
) {
176 if (callback
== NULL
) {
177 return MEMCACHED_INVALID_ARGUMENTS
;
180 bool some_errors
= false;
182 for (uint32_t x
= 0; x
< memcached_instance_list_count(memc
); x
++) {
183 memcached_instance_st
*instance
= memcached_instance_fetch(memc
, x
);
185 memcached_return_t rc
= (*callback
)(memc
, instance
, context
);
186 if (rc
== MEMCACHED_INVALID_ARGUMENTS
) {
188 } else if (memcached_fatal(rc
)) {
194 return MEMCACHED_SUCCESS
;
197 const memcached_instance_st
*memcached_server_by_key(memcached_st
*shell
, const char *key
,
198 size_t key_length
, memcached_return_t
*error
) {
199 Memcached
*memc
= memcached2Memcached(shell
);
200 memcached_return_t unused
;
205 memcached_return_t rc
;
206 if (memcached_failed(rc
= initialize_const_query(memc
))) {
211 if (memcached_failed((memcached_key_test(*memc
, (const char **) &key
, &key_length
, 1)))) {
212 *error
= memcached_last_error(memc
);
216 uint32_t server_key
= memcached_generate_hash(memc
, key
, key_length
);
217 return memcached_instance_by_position(memc
, server_key
);
221 If we do not have a valid object to clone from, we toss an error.
223 static memcached_instance_st
*memcached_instance_clone(memcached_instance_st
*source
) {
224 /* We just do a normal create if source is missing */
225 if (source
== NULL
) {
229 memcached_string_t hostname_
= {memcached_string_make_from_cstr(source
->hostname())};
230 return __instance_create_with(source
->root
, NULL
, hostname_
, source
->port(), source
->weight
,
234 void set_last_disconnected_host(memcached_instance_st
*self
) {
237 if (memcached_server_get_last_disconnect(self
->root
)
238 and memcached_server_get_last_disconnect(self
->root
)->version
== self
->version
)
244 memcached_st
*root
= (memcached_st
*) self
->root
;
246 memcached_instance_free((memcached_instance_st
*) (root
->last_disconnected_server
));
248 // We set is_parsing so that no lookup happens
249 root
->state
.is_parsing
= true;
250 root
->last_disconnected_server
= memcached_instance_clone(self
);
251 root
->state
.is_parsing
= false;
253 ((memcached_instance_st
*) memcached_server_get_last_disconnect(root
))->version
= self
->version
;
257 const memcached_instance_st
*memcached_server_get_last_disconnect(const memcached_st
*shell
) {
258 const Memcached
*self
= memcached2Memcached(shell
);
260 return (const memcached_instance_st
*) self
->last_disconnected_server
;
266 void memcached_instance_next_retry(const memcached_instance_st
*self
, const time_t absolute_time
) {
267 WATCHPOINT_ASSERT(self
);
269 ((memcached_instance_st
*) self
)->next_retry
= absolute_time
;
273 bool memcached_instance_st::valid() const {
274 if (fd
== INVALID_SOCKET
) {
281 bool memcached_instance_st::is_shutting_down() const {
282 return options
.is_shutting_down
;