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.
8 * Redistribution and use in source and binary forms, with or without
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
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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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 static void auto_response(memcached_instance_st
* instance
, const bool reply
, memcached_return_t
& rc
, uint64_t* value
)
42 // If the message was successfully sent, then get the response, otherwise
44 if (memcached_success(rc
))
52 rc
= memcached_response(instance
, &instance
->root
->result
);
55 if (memcached_fatal(rc
))
57 assert(memcached_last_error(instance
->root
) != MEMCACHED_SUCCESS
);
60 else if (memcached_failed(rc
))
66 assert(memcached_last_error(instance
->root
) != MEMCACHED_NOTFOUND
);
67 *value
= instance
->root
->result
.numeric_value
;
71 static memcached_return_t
text_incr_decr(memcached_instance_st
* instance
,
73 const char *key
, size_t key_length
,
74 const uint64_t offset
,
77 char buffer
[MEMCACHED_DEFAULT_COMMAND_SIZE
];
79 int send_length
= snprintf(buffer
, sizeof(buffer
), " %" PRIu64
, offset
);
80 if (size_t(send_length
) >= sizeof(buffer
) or send_length
< 0)
82 return memcached_set_error(*instance
, MEMCACHED_MEMORY_ALLOCATION_FAILURE
, MEMCACHED_AT
,
83 memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
86 libmemcached_io_vector_st vector
[]=
89 { memcached_literal_param("incr ") },
90 { memcached_array_string(instance
->root
->_namespace
), memcached_array_size(instance
->root
->_namespace
) },
92 { buffer
, size_t(send_length
) },
93 { " noreply", reply
? 0 : memcached_literal_param_size(" noreply") },
94 { memcached_literal_param("\r\n") }
99 vector
[1].buffer
= "decr ";
102 return memcached_vdo(instance
, vector
, 7, true);
105 static memcached_return_t
binary_incr_decr(memcached_instance_st
* instance
,
106 protocol_binary_command cmd
,
107 const char *key
, const size_t key_length
,
108 const uint64_t offset
,
109 const uint64_t initial
,
110 const uint32_t expiration
,
115 if(cmd
== PROTOCOL_BINARY_CMD_DECREMENT
)
117 cmd
= PROTOCOL_BINARY_CMD_DECREMENTQ
;
120 if(cmd
== PROTOCOL_BINARY_CMD_INCREMENT
)
122 cmd
= PROTOCOL_BINARY_CMD_INCREMENTQ
;
125 protocol_binary_request_incr request
= {}; // = {.bytes= {0}};
127 initialize_binary_request(instance
, request
.message
.header
);
129 request
.message
.header
.request
.opcode
= cmd
;
130 request
.message
.header
.request
.keylen
= htons((uint16_t)(key_length
+ memcached_array_size(instance
->root
->_namespace
)));
131 request
.message
.header
.request
.extlen
= 20;
132 request
.message
.header
.request
.datatype
= PROTOCOL_BINARY_RAW_BYTES
;
133 request
.message
.header
.request
.bodylen
= htonl((uint32_t)(key_length
+ memcached_array_size(instance
->root
->_namespace
) +request
.message
.header
.request
.extlen
));
134 request
.message
.body
.delta
= memcached_htonll(offset
);
135 request
.message
.body
.initial
= memcached_htonll(initial
);
136 request
.message
.body
.expiration
= htonl((uint32_t) expiration
);
138 libmemcached_io_vector_st vector
[]=
141 { request
.bytes
, sizeof(request
.bytes
) },
142 { memcached_array_string(instance
->root
->_namespace
), memcached_array_size(instance
->root
->_namespace
) },
146 return memcached_vdo(instance
, vector
, 4, true);
149 memcached_return_t
memcached_increment(memcached_st
*memc
,
150 const char *key
, size_t key_length
,
154 return memcached_increment_by_key(memc
, key
, key_length
, key
, key_length
, offset
, value
);
157 static memcached_return_t
increment_decrement_by_key(const protocol_binary_command command
,
159 const char *group_key
, size_t group_key_length
,
160 const char *key
, size_t key_length
,
164 uint64_t local_value
;
170 memcached_return_t rc
;
171 if (memcached_failed(rc
= initialize_query(memc
, true)))
176 if (memcached_is_encrypted(memc
))
178 return memcached_set_error(*memc
, MEMCACHED_NOT_SUPPORTED
, MEMCACHED_AT
,
179 memcached_literal_param("Operation not allowed while encyrption is enabled"));
182 if (memcached_failed(rc
= memcached_key_test(*memc
, (const char **)&key
, &key_length
, 1)))
184 return memcached_last_error(memc
);
187 uint32_t server_key
= memcached_generate_hash_with_redistribution(memc
, group_key
, group_key_length
);
188 memcached_instance_st
* instance
= memcached_instance_fetch(memc
, server_key
);
190 bool reply
= memcached_is_replying(instance
->root
);
192 if (memcached_is_binary(memc
))
194 rc
= binary_incr_decr(instance
, command
,
196 uint64_t(offset
), 0, MEMCACHED_EXPIRATION_NOT_ADD
,
201 rc
= text_incr_decr(instance
,
202 command
== PROTOCOL_BINARY_CMD_INCREMENT
? true : false,
207 auto_response(instance
, reply
, rc
, value
);
212 static memcached_return_t
increment_decrement_with_initial_by_key(const protocol_binary_command command
,
214 const char *group_key
,
215 size_t group_key_length
,
223 uint64_t local_value
;
229 memcached_return_t rc
;
230 if (memcached_failed(rc
= initialize_query(memc
, true)))
235 if (memcached_is_encrypted(memc
))
237 return memcached_set_error(*memc
, MEMCACHED_NOT_SUPPORTED
, MEMCACHED_AT
,
238 memcached_literal_param("Operation not allowed while encryption is enabled"));
241 if (memcached_failed(rc
= memcached_key_test(*memc
, (const char **)&key
, &key_length
, 1)))
243 return memcached_last_error(memc
);
246 uint32_t server_key
= memcached_generate_hash_with_redistribution(memc
, group_key
, group_key_length
);
247 memcached_instance_st
* instance
= memcached_instance_fetch(memc
, server_key
);
249 bool reply
= memcached_is_replying(instance
->root
);
251 if (memcached_is_binary(memc
))
253 rc
= binary_incr_decr(instance
, command
,
255 offset
, initial
, uint32_t(expiration
),
261 rc
= memcached_set_error(*memc
, MEMCACHED_INVALID_ARGUMENTS
, MEMCACHED_AT
,
262 memcached_literal_param("memcached_increment_with_initial_by_key() is not supported via the ASCII protocol"));
265 auto_response(instance
, reply
, rc
, value
);
270 memcached_return_t
memcached_decrement(memcached_st
*memc
,
271 const char *key
, size_t key_length
,
275 return memcached_decrement_by_key(memc
, key
, key_length
, key
, key_length
, offset
, value
);
279 memcached_return_t
memcached_increment_by_key(memcached_st
*shell
,
280 const char *group_key
, size_t group_key_length
,
281 const char *key
, size_t key_length
,
285 Memcached
* memc
= memcached2Memcached(shell
);
286 LIBMEMCACHED_MEMCACHED_INCREMENT_START();
287 memcached_return_t rc
= increment_decrement_by_key(PROTOCOL_BINARY_CMD_INCREMENT
,
289 group_key
, group_key_length
,
293 LIBMEMCACHED_MEMCACHED_INCREMENT_END();
298 memcached_return_t
memcached_decrement_by_key(memcached_st
*shell
,
299 const char *group_key
, size_t group_key_length
,
300 const char *key
, size_t key_length
,
304 Memcached
* memc
= memcached2Memcached(shell
);
305 LIBMEMCACHED_MEMCACHED_DECREMENT_START();
306 memcached_return_t rc
= increment_decrement_by_key(PROTOCOL_BINARY_CMD_DECREMENT
,
308 group_key
, group_key_length
,
311 LIBMEMCACHED_MEMCACHED_DECREMENT_END();
316 memcached_return_t
memcached_increment_with_initial(memcached_st
*memc
,
324 return memcached_increment_with_initial_by_key(memc
, key
, key_length
,
326 offset
, initial
, expiration
, value
);
329 memcached_return_t
memcached_increment_with_initial_by_key(memcached_st
*shell
,
330 const char *group_key
,
331 size_t group_key_length
,
339 LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_START();
340 Memcached
* memc
= memcached2Memcached(shell
);
341 memcached_return_t rc
= increment_decrement_with_initial_by_key(PROTOCOL_BINARY_CMD_INCREMENT
,
343 group_key
, group_key_length
,
345 offset
, initial
, expiration
, value
);
346 LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_END();
351 memcached_return_t
memcached_decrement_with_initial(memcached_st
*memc
,
359 return memcached_decrement_with_initial_by_key(memc
, key
, key_length
,
361 offset
, initial
, expiration
, value
);
364 memcached_return_t
memcached_decrement_with_initial_by_key(memcached_st
*shell
,
365 const char *group_key
,
366 size_t group_key_length
,
374 LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_START();
375 Memcached
* memc
= memcached2Memcached(shell
);
376 memcached_return_t rc
= increment_decrement_with_initial_by_key(PROTOCOL_BINARY_CMD_DECREMENT
,
378 group_key
, group_key_length
,
380 offset
, initial
, expiration
, value
);
382 LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_END();