Mercurial > hg-old > index.cgi

comparison lib/sleep.c @ 398:7987ee447833 3.0-beta1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added generated files for release
author lost@l-w.ca
date Fri, 23 Jul 2010 17:18:52 -0600
parents
children
comparison
equal deleted inserted replaced
397:09fe7c40a082 398:7987ee447833
1 /* Pausing execution of the current thread.
2 Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2007.
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17
18 #include <config.h>
19
20 /* Specification. */
21 #include <unistd.h>
22
23 #include <limits.h>
24
25 #include "verify.h"
26
27 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
28
29 # define WIN32_LEAN_AND_MEAN /* avoid including junk */
30 # include <windows.h>
31
32 unsigned int
33 sleep (unsigned int seconds)
34 {
35 unsigned int remaining;
36
37 /* Sleep for 1 second many times, because
38 1. Sleep is not interruptiple by Ctrl-C,
39 2. we want to avoid arithmetic overflow while multiplying with 1000. */
40 for (remaining = seconds; remaining > 0; remaining--)
41 Sleep (1000);
42
43 return remaining;
44 }
45
46 #elif HAVE_SLEEP
47
48 # undef sleep
49
50 /* Guarantee unlimited sleep and a reasonable return value. Cygwin
51 1.5.x rejects attempts to sleep more than 49.7 days (2**32
52 milliseconds), but uses uninitialized memory which results in a
53 garbage answer. */
54 unsigned int
55 rpl_sleep (unsigned int seconds)
56 {
57 /* This requires int larger than 16 bits. */
58 verify (UINT_MAX / 49 / 24 / 60 / 60);
59 const unsigned int limit = 49 * 24 * 60 * 60;
60 while (limit < seconds)
61 {
62 unsigned int result;
63 seconds -= limit;
64 result = sleep (limit);
65 if (result)
66 return seconds + result;
67 }
68 return sleep (seconds);
69 }
70
71 #else /* !HAVE_SLEEP */
72
73 #error "Please port gnulib sleep.c to your platform, possibly using usleep() or select(), then report this to bug-gnulib."
74
75 #endif