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/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <mach.h>
#include <sys/time.h>
#include <unistd.h>
#include <sysdep-cancel.h>
/* Sleep USECONDS microseconds, or until a previously set timer goes off. */
int
usleep (useconds_t useconds)
{
mach_port_t recv;
int cancel_oldtype;
mach_msg_timeout_t timeout = useconds / 1000 + (useconds % 1000 != 0);
recv = __mach_reply_port ();
cancel_oldtype = LIBC_CANCEL_ASYNC();
(void) __mach_msg (NULL, MACH_RCV_MSG|MACH_RCV_TIMEOUT|MACH_RCV_INTERRUPT,
0, 0, recv, timeout, MACH_PORT_NULL);
LIBC_CANCEL_RESET (cancel_oldtype);
__mach_port_destroy (mach_task_self (), recv);
return 0;
}
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