1 /* $OpenBSD: machdep.h,v 1.3 2003/06/03 03:01:41 millert Exp $ */ 2 /* $NetBSD: machdep.h,v 1.4 1995/04/28 21:30:16 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)machdep.h 8.1 (Berkeley) 5/31/93 33 */ 34 35 #define TIMEOUT 300 /* Sync() timeout in seconds */ 36 37 /* for POSIX systems */ 38 #define blockalarm() \ 39 do { \ 40 sigset_t sigset; \ 41 sigemptyset(&sigset); \ 42 sigaddset(&sigset, SIGALRM); \ 43 sigprocmask(SIG_BLOCK, &sigset, (sigset_t *)0); \ 44 } while (0) 45 #define unblockalarm() \ 46 do { \ 47 sigset_t sigset; \ 48 sigemptyset(&sigset); \ 49 sigaddset(&sigset, SIGALRM); \ 50 sigprocmask(SIG_UNBLOCK, &sigset, (sigset_t *)0); \ 51 } while (0) 52