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33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
/* Implementation of the BSD usleep function using nanosleep.
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Copyright (C) 1996-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <time.h>
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#include <unistd.h>
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int
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usleep (useconds_t useconds)
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{
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struct timespec ts = { .tv_sec = (long int) (useconds / 1000000),
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.tv_nsec = (long int) (useconds % 1000000) * 1000ul };
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/* Note the usleep() is a cancellation point. But since we call
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nanosleep() which itself is a cancellation point we do not have
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to do anything here. */
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return __nanosleep (&ts, NULL);
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}
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