Fix permission issue
[m6w6/libmemcached] / libtest / wait.h
1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
2 *
3 * Data Differential YATL (i.e. libtest) library
4 *
5 * Copyright (C) 2012 Data Differential, http://datadifferential.com/
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * * Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following disclaimer
16 * in the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * * The names of its contributors may not be used to endorse or
20 * promote products derived from this software without specific prior
21 * written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 */
36
37 #pragma once
38
39 #include <unistd.h>
40 #include <string>
41 #include <signal.h>
42
43 #include <libtest/dream.h>
44
45 namespace libtest {
46
47 class Wait
48 {
49 public:
50
51 Wait(const std::string &filename, uint32_t timeout= 6) :
52 _successful(false)
53 {
54 uint32_t waited;
55 uint32_t this_wait;
56 uint32_t retry;
57
58 if (filename.empty())
59 {
60 _successful= false;
61 return;
62 }
63
64 for (waited= 0, retry= 1; ; retry++, waited+= this_wait)
65 {
66 if (access(filename.c_str(), R_OK) == 0)
67 {
68 _successful= true;
69 break;
70 }
71 else if (waited >= timeout)
72 {
73 break;
74 }
75
76 this_wait= retry * retry / 3 + 1;
77 libtest::dream(this_wait, 0);
78 }
79 }
80
81 Wait(const pid_t &_pid_arg, uint32_t timeout= 6) :
82 _successful(false)
83 {
84 uint32_t waited;
85 uint32_t this_wait;
86 uint32_t retry;
87
88 for (waited= 0, retry= 1; ; retry++, waited+= this_wait)
89 {
90 if (kill(_pid_arg, 0) == 0)
91 {
92 _successful= true;
93 break;
94 }
95 else if (waited >= timeout)
96 {
97 break;
98 }
99
100 this_wait= retry * retry / 3 + 1;
101 libtest::dream(this_wait, 0);
102 }
103 }
104
105 bool successful() const
106 {
107 return _successful;
108 }
109
110 private:
111 bool _successful;
112 };
113
114 } // namespace libtest