/*
 * Copyright (c) 2002-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */

#ifndef _SYS_UCONTEXT_H_
#define _SYS_UCONTEXT_H_

#include <sys/cdefs.h>
#include <sys/_types.h>
#include <machine/ucontext.h>

#ifndef _SIGSET_T
#define _SIGSET_T
typedef __darwin_sigset_t	sigset_t;
#endif

#ifndef _STACK_T
#define _STACK_T
typedef __darwin_stack_t	stack_t;
#endif

#ifndef _UCONTEXT_T
#define _UCONTEXT_T
#ifndef _POSIX_C_SOURCE
typedef struct ucontext 	ucontext_t;
#else /* _POSIX_C_SOURCE */
typedef struct __darwin_ucontext ucontext_t;
#endif /* _POSIX_C_SOURCE */
#endif

#ifndef _POSIX_C_SOURCE
#ifndef _UCONTEXT64_T
#define _UCONTEXT64_T
typedef struct ucontext64	ucontext64_t;
#endif
#endif /* _POSIX_C_SOURCE */

#ifdef KERNEL
#include <machine/types.h>	/* user_addr_t, user_size_t */

#if __DARWIN_ALIGN_NATURAL
#pragma options align=natural
#endif

/* kernel representation of struct ucontext64 for 64 bit processes */
struct user_ucontext64 {
	int				uc_onstack;
	sigset_t			uc_sigmask;	/* signal mask */
	struct user_sigaltstack 	uc_stack;	/* stack */
	user_addr_t			uc_link;	/* ucontext pointer */
	user_size_t			uc_mcsize;	/* mcontext size */
	user_addr_t			uc_mcontext64;	/* machine context */
};

#if __DARWIN_ALIGN_NATURAL
#pragma options align=reset
#endif

typedef struct user_ucontext64 user_ucontext64_t;
#endif	/* KERNEL */

#endif /* _SYS_UCONTEXT_H_ */
