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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9 * modification, are permitted provided that the following conditions are
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13 * notice, this list of conditions and the following disclaimer.
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 #include <libmemcached/common.h>
40 char *memcached_fetch(memcached_st
*ptr
, char *key
, size_t *key_length
,
43 memcached_return_t
*error
)
45 memcached_result_st
*result_buffer
= &ptr
->result
;
46 memcached_return_t unused
;
51 unlikely (ptr
->flags
.use_udp
)
65 *error
= MEMCACHED_NOT_SUPPORTED
;
69 result_buffer
= memcached_fetch_result(ptr
, result_buffer
, error
);
70 if (result_buffer
== NULL
or memcached_failed(*error
))
72 WATCHPOINT_ASSERT(result_buffer
== NULL
);
89 *value_length
= memcached_string_length(&result_buffer
->value
);
93 if (result_buffer
->key_length
> MEMCACHED_MAX_KEY
)
95 *error
= MEMCACHED_KEY_TOO_BIG
;
110 strncpy(key
, result_buffer
->item_key
, result_buffer
->key_length
); // For the binary protocol we will cut off the key :(
112 *key_length
= result_buffer
->key_length
;
116 *flags
= result_buffer
->item_flags
;
118 return memcached_string_take_value(&result_buffer
->value
);
121 memcached_result_st
*memcached_fetch_result(memcached_st
*ptr
,
122 memcached_result_st
*result
,
123 memcached_return_t
*error
)
125 memcached_server_st
*server
;
127 memcached_return_t unused
;
133 *error
= MEMCACHED_INVALID_ARGUMENTS
;
137 if (ptr
->flags
.use_udp
)
139 *error
= MEMCACHED_NOT_SUPPORTED
;
145 // If we have already initialized (ie it is in use) our internal, we
147 if (memcached_is_initialized(&ptr
->result
))
149 if (not (result
= memcached_result_create(ptr
, NULL
)))
151 *error
= MEMCACHED_MEMORY_ALLOCATION_FAILURE
;
157 result
= memcached_result_create(ptr
, &ptr
->result
);
161 *error
= MEMCACHED_MAXIMUM_RETURN
; // We use this to see if we ever go into the loop
162 while ((server
= memcached_io_get_readable_server(ptr
)))
164 char buffer
[MEMCACHED_DEFAULT_COMMAND_SIZE
];
165 *error
= memcached_response(server
, buffer
, sizeof(buffer
), result
);
167 if (*error
== MEMCACHED_SUCCESS
)
172 else if (*error
== MEMCACHED_END
)
174 memcached_server_response_reset(server
);
176 else if (*error
!= MEMCACHED_NOTFOUND
)
182 if (*error
== MEMCACHED_NOTFOUND
and result
->count
)
184 *error
= MEMCACHED_END
;
186 else if (*error
== MEMCACHED_MAXIMUM_RETURN
and result
->count
)
188 *error
= MEMCACHED_END
;
190 else if (*error
== MEMCACHED_MAXIMUM_RETURN
) // while() loop was never entered
192 *error
= MEMCACHED_NOTFOUND
;
194 else if (*error
== MEMCACHED_SUCCESS
)
196 *error
= MEMCACHED_END
;
198 else if (result
->count
== 0)
200 *error
= MEMCACHED_NOTFOUND
;
203 /* We have completed reading data */
204 if (memcached_is_allocated(result
))
206 memcached_result_free(result
);
211 memcached_string_reset(&result
->value
);
217 memcached_return_t
memcached_fetch_execute(memcached_st
*ptr
,
218 memcached_execute_fn
*callback
,
220 uint32_t number_of_callbacks
)
222 memcached_result_st
*result
= &ptr
->result
;
223 memcached_return_t rc
;
224 bool some_errors
= false;
226 while ((result
= memcached_fetch_result(ptr
, result
, &rc
)))
228 if (memcached_failed(rc
) and rc
== MEMCACHED_NOTFOUND
)
232 else if (memcached_failed(rc
))
234 memcached_set_error(*ptr
, rc
, MEMCACHED_AT
);
239 for (uint32_t x
= 0; x
< number_of_callbacks
; x
++)
241 memcached_return_t ret
= (*callback
[x
])(ptr
, result
, context
);
242 if (memcached_failed(ret
))
245 memcached_set_error(*ptr
, ret
, MEMCACHED_AT
);
253 return MEMCACHED_SOME_ERRORS
;
256 // If we were able to run all keys without issue we return
258 if (memcached_success(rc
))
260 return MEMCACHED_SUCCESS
;