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comparison lib/nanosleep.c @ 2052:3c79d37078c2

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*** empty log message ***
author Jim Meyering <jim@meyering.net>
date Sat, 25 Dec 1999 22:15:23 +0000
parents
children 0d23f740f281
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2051:20197e046796 2052:3c79d37078c2
1 /* Provide a replacement for the POSIX nanosleep function.
2 Copyright (C) 1999 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
17
18 /* written by Jim Meyering */
19
20 #include <config.h>
21
22 #include <sys/types.h>
23
24 #include <time.h>
25 /* FIXME: is including both like this kosher? */
26 #include <sys/time.h>
27
28 static interrupted;
29
30 /* Sleep for USEC microseconds. */
31
32 static void
33 usleep (const struct timespec *ts_delay)
34 {
35 struct timeval tv_delay;
36 tv_delay.tv_sec = ts_delay->tv_sec;
37 tv_delay.tv_usec = 1000 * ts_delay->tv_nsec;
38 select (0, (void *) 0, (void *) 0, (void *) 0, tv_delay);
39 }
40
41 int
42 nanosleep (const struct timespec *requested_delay,
43 struct timespec *remaining_delay)
44 {
45 interrupted = 0;
46
47 /* set up sig handler -- but maybe only do this the first time? */
48 /* FIXME */
49
50 usleep (requested_delay);
51
52 if (interrupted)
53 {
54 /* Calculate time remaining. */
55 /* FIXME: the code in sleep doesn't use this, so there's no
56 rush to implement it. */
57 }
58
59 /* FIXME: Restore sig handler? */
60
61 return interrupted;
62 }