From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/mach/usleep.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 sysdeps/mach/usleep.c (limited to 'sysdeps/mach/usleep.c') diff --git a/sysdeps/mach/usleep.c b/sysdeps/mach/usleep.c new file mode 100644 index 0000000000..90d47d8c24 --- /dev/null +++ b/sysdeps/mach/usleep.c @@ -0,0 +1,43 @@ +/* Copyright (C) 1992, 1993, 1994 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include + +/* Sleep USECONDS microseconds, or until a previously set timer goes off. */ +unsigned int +DEFUN(usleep, (useconds), unsigned int useconds) +{ + mach_port_t recv; + struct timeval before, after; + + recv = __mach_reply_port (); + + if (__gettimeofday (&before, NULL) < 0) + return useconds; + (void) __mach_msg (NULL, MACH_RCV_MSG|MACH_RCV_TIMEOUT|MACH_RCV_INTERRUPT, + 0, 0, recv, (useconds + 999) / 1000, MACH_PORT_NULL); + __mach_port_destroy (mach_task_self (), recv); + if (__gettimeofday (&after, NULL) < 0) + return 0; + + return useconds - (((after.tv_sec - before.tv_sec) * 1000000) + + (after.tv_usec - before.tv_usec)); +} -- cgit v1.2.3