signal.h

来自「基于组件方式开发操作系统的OSKIT源代码」· C头文件 代码 · 共 113 行

/*
 * Copyright (c) 1982, 1986, 1989, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * 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.
 *
 *	@(#)signal.h	8.2 (Berkeley) 1/21/94
 * signal.h,v 1.2 1994/08/02 07:53:32 davidg Exp
 */

#ifndef	_SYS_SIGNAL_H_
#define	_SYS_SIGNAL_H_

#include <sys/types.h>
#include <oskit/c/signal.h>

#ifndef _POSIX_SOURCE
#include <machine/trap.h>		/* codes for SIGILL, SIGFPE */
#endif

#ifndef _ANSI_SOURCE
#ifndef _POSIX_SOURCE

#include <sys/cdefs.h>

typedef	void (*sig_t) __P((int));	/* type of signal function */

/*
 * Structure used in sigaltstack call.
 */
struct	sigaltstack {
	char	*ss_base;		/* signal stack base */
	int	ss_size;		/* signal stack length */
	int	ss_flags;		/* SA_DISABLE and/or SA_ONSTACK */
};
#define	MINSIGSTKSZ	8192			/* minimum allowable stack */
#define	SIGSTKSZ	(MINSIGSTKSZ + 32768)	/* recommended stack size */

/*
 * 4.3 compatibility:
 * Signal vector "template" used in sigvec call.
 */
struct	sigvec {
	void	(*sv_handler)();	/* signal handler */
	int	sv_mask;		/* signal mask to apply */
	int	sv_flags;		/* see signal options below */
};

#define SV_ONSTACK	SA_ONSTACK
#define SV_INTERRUPT	SA_RESTART	/* same bit, opposite sense */
#define sv_onstack sv_flags	/* isn't compatibility wonderful! */

/*
 * Structure used in sigstack call.
 */
struct	sigstack {
	char	*ss_sp;			/* signal stack pointer */
	int	ss_onstack;		/* current status */
};

/*
 * Macro for converting signal number to a mask suitable for
 * sigblock().
 */
#define sigmask(m)	(1 << ((m)-1))

#define	BADSIG		SIG_ERR

#endif	/* !_POSIX_SOURCE */
#endif	/* !_ANSI_SOURCE */


/*
 * For historical reasons; programs expect signal's return value to be
 * defined by <sys/signal.h>.
 */
__BEGIN_DECLS
void	(*signal __P((int, void (*) __P((int))))) __P((int));
int	sigaltstack __P((const struct sigaltstack *, struct sigaltstack *));
__END_DECLS
#endif	/* !_SYS_SIGNAL_H_ */