52489b95fdef180a4fd97076bb2d04cb19a96be7
[awesomized/libmemcached] / libmemcached / util / ping.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 * Summary: connects to a host, and makes sure it is alive.
37 *
38 */
39
40 #include <libmemcached/common.h>
41 #include <libmemcached/memcached_util.h>
42
43
44 bool libmemcached_util_ping(const char *hostname, in_port_t port, memcached_return_t *ret)
45 {
46 memcached_st *memc_ptr= memcached_create(NULL);
47
48 memcached_return_t rc= memcached_server_add(memc_ptr, hostname, port);
49 if (memcached_success(rc))
50 {
51 rc= memcached_version(memc_ptr);
52 }
53
54 if (memcached_failed(rc) and rc == MEMCACHED_SOME_ERRORS)
55 {
56 memcached_server_instance_st instance=
57 memcached_server_instance_by_position(memc_ptr, 0);
58
59 if (instance and instance->error_messages)
60 {
61 rc= memcached_server_error_return(instance);
62 }
63 }
64 memcached_free(memc_ptr);
65
66 if (ret)
67 {
68 *ret= rc;
69 }
70
71 return memcached_success(rc);
72 }