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[awesomized/libmemcached] / libmemcachedutil / version.cc
1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
2 *
3 * Libmemcached library
4 *
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2010 Brian Aker All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
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
28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 */
37
38
39 #include <libmemcachedutil/common.h>
40 #include <cassert>
41
42 struct local_context
43 {
44 uint8_t major_version;
45 uint8_t minor_version;
46 uint8_t micro_version;
47
48 bool truth;
49 };
50
51 static memcached_return_t check_server_version(const memcached_st *,
52 memcached_server_instance_st instance,
53 void *context)
54 {
55 /* Do Nothing */
56 struct local_context *check= (struct local_context *)context;
57
58 if (memcached_server_major_version(instance) != UINT8_MAX &&
59 memcached_server_major_version(instance) >= check->major_version and
60 memcached_server_minor_version(instance) >= check->minor_version and
61 memcached_server_micro_version(instance) >= check->micro_version )
62 {
63 return MEMCACHED_SUCCESS;
64 }
65
66 check->truth= false;
67
68 return MEMCACHED_FAILURE;
69 }
70
71 bool libmemcached_util_version_check(memcached_st *memc,
72 uint8_t major_version,
73 uint8_t minor_version,
74 uint8_t micro_version)
75 {
76 if (memcached_failed(memcached_version(memc)))
77 {
78 return false;
79 }
80
81 struct local_context check= { major_version, minor_version, micro_version, true };
82
83 memcached_server_fn callbacks[1];
84 callbacks[0]= check_server_version;
85 memcached_server_cursor(memc, callbacks, (void *)&check, 1);
86
87 return check.truth;
88 }