Merge build trunk.
[awesomized/libmemcached] / libmemcached / 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
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 */
37 #include <libmemcached/common.h>
38
39 const char * memcached_lib_version(void)
40 {
41 return LIBMEMCACHED_VERSION_STRING;
42 }
43
44 static inline memcached_return_t memcached_version_textual(memcached_st *ptr)
45 {
46 libmemcached_io_vector_st vector[]=
47 {
48 { memcached_literal_param("version\r\n") },
49 };
50
51 uint32_t success= 0;
52 bool errors_happened= false;
53 for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
54 {
55 memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
56
57 // Optimization, we only fetch version once.
58 if (instance->major_version != UINT8_MAX)
59 {
60 continue;
61 }
62
63 memcached_return_t rrc;
64 if (memcached_failed(rrc= memcached_vdo(instance, vector, 1, true)))
65 {
66 errors_happened= true;
67 (void)memcached_set_error(*instance, rrc, MEMCACHED_AT);
68 continue;
69 }
70 success++;
71 }
72
73 if (success)
74 {
75 // Collect the returned items
76 memcached_server_write_instance_st instance;
77 while ((instance= memcached_io_get_readable_server(ptr)))
78 {
79 memcached_return_t rrc= memcached_response(instance, NULL);
80 if (memcached_failed(rrc))
81 {
82 memcached_io_reset(instance);
83 errors_happened= true;
84 }
85 }
86 }
87
88 return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
89 }
90
91 static inline memcached_return_t memcached_version_binary(memcached_st *ptr)
92 {
93 protocol_binary_request_version request= {};
94 request.message.header.request.magic= PROTOCOL_BINARY_REQ;
95 request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
96 request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
97
98 libmemcached_io_vector_st vector[]=
99 {
100 { request.bytes, sizeof(request.bytes) }
101 };
102
103 uint32_t success= 0;
104 bool errors_happened= false;
105 for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
106 {
107 memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
108
109 if (instance->major_version != UINT8_MAX)
110 {
111 continue;
112 }
113
114 memcached_return_t rrc= memcached_vdo(instance, vector, 1, true);
115 if (memcached_failed(rrc))
116 {
117 memcached_io_reset(instance);
118 errors_happened= true;
119 continue;
120 }
121
122 success++;
123 }
124
125 if (success)
126 {
127 // Collect the returned items
128 memcached_server_write_instance_st instance;
129 while ((instance= memcached_io_get_readable_server(ptr)))
130 {
131 char buffer[32];
132 memcached_return_t rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
133 if (memcached_failed(rrc))
134 {
135 memcached_io_reset(instance);
136 errors_happened= true;
137 }
138 }
139 }
140
141 return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
142 }
143
144 memcached_return_t memcached_version(memcached_st *ptr)
145 {
146 memcached_return_t rc;
147 if (memcached_failed(rc= initialize_query(ptr, true)))
148 {
149 return rc;
150 }
151
152 if (memcached_is_udp(ptr))
153 {
154 return MEMCACHED_NOT_SUPPORTED;
155 }
156
157 if (memcached_is_binary(ptr))
158 {
159 return memcached_version_binary(ptr);
160 }
161
162 return memcached_version_textual(ptr);
163 }