57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* Copyright (c) 2009 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif /* HAVE_SYS_SELECT_H */
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#if TIME_WITH_SYS_TIME
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# include <time.h>
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#endif
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#ifndef HAVE_TIMESPEC
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# include <emul/timespec.h>
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#endif
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#include <errno.h>
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#include "compat.h"
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int
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nanosleep(ts, rts)
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const struct timespec *ts;
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struct timespec *rts;
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{
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struct timeval timeout, endtime, now;
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int rval;
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timeout.tv_sec = ts->tv_sec;
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timeout.tv_usec = ts->tv_nsec / 1000;
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if (rts != NULL) {
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gettimeofday(&endtime, NULL);
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timeradd(&endtime, &timeout, &endtime);
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}
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rval = select(0, NULL, NULL, NULL, &timeout);
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if (rts != NULL && rval == -1 && errno == EINTR) {
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gettimeofday(&now, NULL);
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timersub(&endtime, &now, &timeout);
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rts->tv_sec = timeout.tv_sec;
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rts->tv_nsec = timeout.tv_usec * 1000;
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}
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return(rval);
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}
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