libast/tm/tvsleep.c

da2e3ebdSchin/***********************************************************************
5947648bSMarcel Telka *                                                                      *
5947648bSMarcel Telka *               This software is part of the ast package               *
5947648bSMarcel Telka *          Copyright (c) 1985-2013 AT&T Intellectual Property          *
5947648bSMarcel Telka *                      and is licensed under the                       *
5947648bSMarcel Telka *                 Eclipse Public License, Version 1.0                  *
5947648bSMarcel Telka *                    by AT&T Intellectual Property                     *
5947648bSMarcel Telka *                                                                      *
5947648bSMarcel Telka *                A copy of the License is available at                 *
5947648bSMarcel Telka *          http://www.eclipse.org/org/documents/epl-v10.html           *
5947648bSMarcel Telka *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
5947648bSMarcel Telka *                                                                      *
5947648bSMarcel Telka *              Information and Software Systems Research               *
5947648bSMarcel Telka *                            AT&T Research                             *
5947648bSMarcel Telka *                           Florham Park NJ                            *
5947648bSMarcel Telka *                                                                      *
5947648bSMarcel Telka *               Glenn Fowler <glenn.s.fowler@gmail.com>                *
5947648bSMarcel Telka *                    David Korn <dgkorn@gmail.com>                     *
5947648bSMarcel Telka *                     Phong Vo <phongvo@gmail.com>                     *
5947648bSMarcel Telka *                                                                      *
5947648bSMarcel Telka ***********************************************************************/
5947648bSMarcel Telka
5947648bSMarcel Telka#include <errno.h>
5947648bSMarcel Telka#include <time.h>
5947648bSMarcel Telka
5947648bSMarcel Telka#include "tv.h"
da2e3ebdSchin
da2e3ebdSchin/*
da2e3ebdSchin * sleep for tv
da2e3ebdSchin * non-zero exit if sleep did not complete
da2e3ebdSchin * with remaining time in rv
5947648bSMarcel Telka *
5947648bSMarcel Telka * NOTE: some systems hide nanosleep() ouside of -lc -- puleeze
da2e3ebdSchin */
da2e3ebdSchin
5947648bSMarcel Telkaint tvsleep(const Tv_t *tv, Tv_t *rv) {
5947648bSMarcel Telka    struct timespec stv;
5947648bSMarcel Telka    struct timespec srv;
5947648bSMarcel Telka    int r;
5947648bSMarcel Telka
5947648bSMarcel Telka    stv.tv_sec = tv->tv_sec;
5947648bSMarcel Telka    stv.tv_nsec = tv->tv_nsec;
5947648bSMarcel Telka    if ((r = nanosleep(&stv, &srv)) && errno == EINTR && rv) {
5947648bSMarcel Telka        rv->tv_sec = srv.tv_sec;
5947648bSMarcel Telka        rv->tv_nsec = srv.tv_nsec;
5947648bSMarcel Telka    }
5947648bSMarcel Telka    return r;
*b30d1939SAndy Fiddaman }