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
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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
;
52 if (memcached_is_udp(ptr
))
74 *error
= MEMCACHED_NOT_SUPPORTED
;
78 result_buffer
= memcached_fetch_result(ptr
, result_buffer
, error
);
79 if (result_buffer
== NULL
or memcached_failed(*error
))
81 WATCHPOINT_ASSERT(result_buffer
== NULL
);
107 *value_length
= memcached_string_length(&result_buffer
->value
);
112 if (result_buffer
->key_length
> MEMCACHED_MAX_KEY
)
114 *error
= MEMCACHED_KEY_TOO_BIG
;
138 strncpy(key
, result_buffer
->item_key
, result_buffer
->key_length
); // For the binary protocol we will cut off the key :(
141 *key_length
= result_buffer
->key_length
;
147 *flags
= result_buffer
->item_flags
;
150 return memcached_string_take_value(&result_buffer
->value
);
153 memcached_result_st
*memcached_fetch_result(memcached_st
*ptr
,
154 memcached_result_st
*result
,
155 memcached_return_t
*error
)
157 memcached_return_t unused
;
163 *error
= MEMCACHED_INVALID_ARGUMENTS
;
167 if (memcached_is_udp(ptr
))
169 *error
= MEMCACHED_NOT_SUPPORTED
;
175 // If we have already initialized (ie it is in use) our internal, we
177 if (memcached_is_initialized(&ptr
->result
))
179 if (not (result
= memcached_result_create(ptr
, NULL
)))
181 *error
= MEMCACHED_MEMORY_ALLOCATION_FAILURE
;
187 result
= memcached_result_create(ptr
, &ptr
->result
);
191 *error
= MEMCACHED_MAXIMUM_RETURN
; // We use this to see if we ever go into the loop
192 memcached_server_st
*server
;
193 while ((server
= memcached_io_get_readable_server(ptr
)))
195 char buffer
[MEMCACHED_DEFAULT_COMMAND_SIZE
];
196 *error
= memcached_response(server
, buffer
, sizeof(buffer
), result
);
198 if (*error
== MEMCACHED_IN_PROGRESS
)
202 else if (*error
== MEMCACHED_SUCCESS
)
207 else if (*error
== MEMCACHED_END
)
209 memcached_server_response_reset(server
);
211 else if (*error
!= MEMCACHED_NOTFOUND
)
217 if (*error
== MEMCACHED_NOTFOUND
and result
->count
)
219 *error
= MEMCACHED_END
;
221 else if (*error
== MEMCACHED_MAXIMUM_RETURN
and result
->count
)
223 *error
= MEMCACHED_END
;
225 else if (*error
== MEMCACHED_MAXIMUM_RETURN
) // while() loop was never entered
227 *error
= MEMCACHED_NOTFOUND
;
229 else if (*error
== MEMCACHED_SUCCESS
)
231 *error
= MEMCACHED_END
;
233 else if (result
->count
== 0)
235 *error
= MEMCACHED_NOTFOUND
;
238 /* We have completed reading data */
239 if (memcached_is_allocated(result
))
241 memcached_result_free(result
);
246 memcached_string_reset(&result
->value
);
252 memcached_return_t
memcached_fetch_execute(memcached_st
*ptr
,
253 memcached_execute_fn
*callback
,
255 uint32_t number_of_callbacks
)
257 memcached_result_st
*result
= &ptr
->result
;
258 memcached_return_t rc
;
259 bool some_errors
= false;
261 while ((result
= memcached_fetch_result(ptr
, result
, &rc
)))
263 if (memcached_failed(rc
) and rc
== MEMCACHED_NOTFOUND
)
267 else if (memcached_failed(rc
))
269 memcached_set_error(*ptr
, rc
, MEMCACHED_AT
);
274 for (uint32_t x
= 0; x
< number_of_callbacks
; x
++)
276 memcached_return_t ret
= (*callback
[x
])(ptr
, result
, context
);
277 if (memcached_failed(ret
))
280 memcached_set_error(*ptr
, ret
, MEMCACHED_AT
);
288 return MEMCACHED_SOME_ERRORS
;
291 // If we were able to run all keys without issue we return
293 if (memcached_success(rc
))
295 return MEMCACHED_SUCCESS
;