uwait.h

早期freebsd实现

/*
 * Copyright (c) 1989 Jan-Simon Pendry
 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Jan-Simon Pendry at Imperial College, London.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)uwait.h	8.1 (Berkeley) 6/6/93
 *
 * $Id: uwait.h,v 5.2.2.1 1992/02/09 15:10:01 jsp beta $
 *
 */

#if defined(mc68k) || defined(mc68000) || defined(mc68020) || defined(sparc) || defined(hp9000s300) || defined(hp9000s800)
#define BITS_BIGENDIAN
#endif
#if defined(vax) || defined(i386)
#define BITS_LITTLENDIAN
#endif
#if !defined BITS_BIGENDIAN && !defined BITS_LITTLENDIAN
 #error Do not know my byte ordering
#endif

/*
 * Structure of the information in the first word returned by both
 * wait and wait3.  If w_stopval==WSTOPPED, then the second structure
 * describes the information returned, else the first.  See WUNTRACED below.
 */
union wait	{
	int	w_status;		/* used in syscall */
	/*
	 * Terminated process status.
	 */
	struct {
#ifdef BITS_LITTLENDIAN
		unsigned short	w_Termsig:7;	/* termination signal */
		unsigned short	w_Coredump:1;	/* core dump indicator */
		unsigned short	w_Retcode:8;	/* exit code if w_termsig==0 */
#endif
#ifdef BITS_BIGENDIAN
		unsigned short	w_Fill1:16;	/* high 16 bits unused */
		unsigned short	w_Retcode:8;	/* exit code if w_termsig==0 */
		unsigned short	w_Coredump:1;	/* core dump indicator */
		unsigned short	w_Termsig:7;	/* termination signal */
#endif
	} w_U;
};
#define	w_termsig	w_U.w_Termsig
#define w_coredump	w_U.w_Coredump
#define w_retcode	w_U.w_Retcode

#define WIFSIGNALED(x)	((x).w_termsig != 0)
#define WIFEXITED(x)	((x).w_termsig == 0)