42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/* Copyright (C) 1992-2014 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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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <mach.h>
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#include <sys/time.h>
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#include <unistd.h>
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/* Sleep USECONDS microseconds, or until a previously set timer goes off. */
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int
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usleep (useconds_t useconds)
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{
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mach_port_t recv;
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struct timeval before, after;
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recv = __mach_reply_port ();
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if (__gettimeofday (&before, NULL) < 0)
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return -1;
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(void) __mach_msg (NULL, MACH_RCV_MSG|MACH_RCV_TIMEOUT|MACH_RCV_INTERRUPT,
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0, 0, recv, (useconds + 999) / 1000, MACH_PORT_NULL);
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__mach_port_destroy (mach_task_self (), recv);
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if (__gettimeofday (&after, NULL) < 0)
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return -1;
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return 0;
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}
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