/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_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,
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 * Please see the License for the specific language governing rights and
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 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */
/*
 *	File:	ipc/ipc_pset.h
 *	Author:	Rich Draves
 *	Date:	1989
 *
 *	Definitions for port sets.
 */

#ifndef	_IPC_IPC_PSET_H_
#define _IPC_IPC_PSET_H_

#include <mach/mach_types.h>
#include <mach/port.h>
#include <mach/kern_return.h>
#include <kern/kern_types.h>
#include <ipc/ipc_types.h>
#include <ipc/ipc_object.h>
#include <ipc/ipc_mqueue.h>

struct ipc_pset {

	/*
	 * Initial sub-structure in common with all ipc_objects.
	 */
	struct ipc_object	ips_object;
	struct ipc_mqueue	ips_messages;
};

#define	ips_references		ips_object.io_references

#define	ips_active(pset)	io_active(&(pset)->ips_object)
#define	ips_lock(pset)		io_lock(&(pset)->ips_object)
#define	ips_lock_try(pset)	io_lock_try(&(pset)->ips_object)
#define ips_lock_held_kdp(pset)	io_lock_held_kdp(&(pset)->ips_object)
#define	ips_unlock(pset)	io_unlock(&(pset)->ips_object)
#define	ips_reference(pset)	io_reference(&(pset)->ips_object)
#define	ips_release(pset)	io_release(&(pset)->ips_object)

/* get an ipc_pset pointer from an ipc_mqueue pointer */
#define	ips_from_mq(mq) \
		__container_of(mq, struct ipc_pset, ips_messages)

/* Allocate a port set */
extern kern_return_t ipc_pset_alloc(
	ipc_space_t		space,
	mach_port_name_t	*namep,
	ipc_pset_t		*psetp);

/* Allocate a port set, with a specific name */
extern kern_return_t ipc_pset_alloc_name(
	ipc_space_t		space,
	mach_port_name_t	name,
	ipc_pset_t		*psetp);

/* Allocate a port set in a special space */
extern ipc_pset_t ipc_pset_alloc_special(
	ipc_space_t		space);

/* Add a port to a port set */
extern kern_return_t ipc_pset_add(
	ipc_pset_t	pset,
	ipc_port_t	port,
	uint64_t	*reserved_link,
	uint64_t	*reserved_prepost);

/* determine if port is a member of set */
extern boolean_t ipc_pset_member(
	ipc_pset_t	pset,
	ipc_port_t	port);

/* Remove a port from a port set */
extern kern_return_t ipc_pset_remove(
	ipc_pset_t	pset,
	ipc_port_t	port);

/* lazily initialize the wqset of a port set */
extern kern_return_t ipc_pset_lazy_allocate(
	ipc_space_t	 space,
	mach_port_name_t psname);

/* Remove a port from all its current port sets */
extern kern_return_t ipc_pset_remove_from_all(
	ipc_port_t	port);

/* Destroy a port_set */
extern void ipc_pset_destroy(
	ipc_pset_t	pset);

#if MACH_KERNEL_PRIVATE
extern struct turnstile *filt_machport_kqueue_turnstile(
	struct knote *kn);

extern struct turnstile *filt_machport_stashed_special_reply_port_turnstile(
	ipc_port_t port);

extern void filt_machport_turnstile_prepare_lazily(
	struct knote *kn,
	mach_msg_type_name_t	msgt_name,
	ipc_port_t port);

extern struct turnstile *filt_machport_stash_port(
	struct knote *kn,
	ipc_port_t port,
	int *link);
#endif

#endif	/* _IPC_IPC_PSET_H_ */
