xref: /illumos-gate/usr/src/contrib/ast/src/lib/libast/tm/tvsleep.c (revision b30d193948be5a7794d7ae3ba0ed9c2f72c88e0f)
1 /***********************************************************************
2  *                                                                      *
3  *               This software is part of the ast package               *
4  *          Copyright (c) 1985-2013 AT&T Intellectual Property          *
5  *                      and is licensed under the                       *
6  *                 Eclipse Public License, Version 1.0                  *
7  *                    by AT&T Intellectual Property                     *
8  *                                                                      *
9  *                A copy of the License is available at                 *
10  *          http://www.eclipse.org/org/documents/epl-v10.html           *
11  *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12  *                                                                      *
13  *              Information and Software Systems Research               *
14  *                            AT&T Research                             *
15  *                           Florham Park NJ                            *
16  *                                                                      *
17  *               Glenn Fowler <glenn.s.fowler@gmail.com>                *
18  *                    David Korn <dgkorn@gmail.com>                     *
19  *                     Phong Vo <phongvo@gmail.com>                     *
20  *                                                                      *
21  ***********************************************************************/
22 
23 #include <errno.h>
24 #include <time.h>
25 
26 #include "tv.h"
27 
28 /*
29  * sleep for tv
30  * non-zero exit if sleep did not complete
31  * with remaining time in rv
32  *
33  * NOTE: some systems hide nanosleep() ouside of -lc -- puleeze
34  */
35 
tvsleep(const Tv_t * tv,Tv_t * rv)36 int tvsleep(const Tv_t *tv, Tv_t *rv) {
37     struct timespec stv;
38     struct timespec srv;
39     int r;
40 
41     stv.tv_sec = tv->tv_sec;
42     stv.tv_nsec = tv->tv_nsec;
43     if ((r = nanosleep(&stv, &srv)) && errno == EINTR && rv) {
44         rv->tv_sec = srv.tv_sec;
45         rv->tv_nsec = srv.tv_nsec;
46     }
47     return r;
48  }
49