[apple/xnu.git] / osfmk / mach / port.h

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 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:	mach/port.h
 *
 *	Definition of a Mach port
 *
 *	Mach ports are the endpoints to Mach-implemented communications
 *	channels (usually uni-directional message queues, but other types
 *	also exist).
 *
 *	Unique collections of these endpoints are maintained for each
 *	Mach task.  Each Mach port in the task's collection is given a 
 *	[task-local] name to identify it - and the the various "rights"
 *	held by the task for that specific endpoint.
 *
 *	This header defines the types used to identify these Mach ports
 *	and the various rights associated with them.  For more info see:
 *
 *	<mach/mach_port.h> - manipulation of port rights in a given space
 *	<mach/message.h> - message queue [and port right passing] mechanism
 *
 */

#ifndef	_MACH_PORT_H_
#define _MACH_PORT_H_

#include <stdint.h>
#include <mach/boolean.h>
#include <mach/machine/vm_types.h>

/*
 *	mach_port_name_t - the local identity for a Mach port
 *
 *	The name is Mach port namespace specific.  It is used to
 *	identify the rights held for that port by the task whose
 *	namespace is implied [or specifically provided].
 *
 *	Use of this type usually implies just a name - no rights.
 *	See mach_port_t for a type that implies a "named right."
 *
 */
 
typedef natural_t mach_port_name_t;
typedef mach_port_name_t *mach_port_name_array_t;

#ifdef	KERNEL_PRIVATE

/* 
 *	mach_port_t - a named port right
 *
 *	In the kernel, "rights" are represented [named] by pointers to
 *	the ipc port object in question. There is no port namespace for the
 *	rights to be collected.
 *
 *	Actually, there is namespace for the kernel task.  But most kernel
 *	code - including, but not limited to, Mach IPC code - lives in the
 *	limbo between the current user-level task and the "next" task. Very
 *	little of the kernel code runs in full kernel task context.  So very
 *	little of it gets to use the kernel task's port name space.  
 *
 *	Because of this implementation approach, all in-kernel rights for
 *	a given port coalesce [have the same name/pointer].  The actual
 *	references are counted in the port itself.  It is up to the kernel
 *	code in question to "just remember" how many [and what type of]
 *	rights it holds and handle them appropriately.
 *
 */

#ifndef	MACH_KERNEL_PRIVATE
/*
 *	For kernel code that resides outside of Mach proper, we opaque the
 *	port structure definition.
 */
struct ipc_port ;

#endif	/* MACH_KERNEL_PRIVATE */

typedef struct ipc_port	        *ipc_port_t;

#define IPC_PORT_NULL		((ipc_port_t) 0)
#define IPC_PORT_DEAD		((ipc_port_t)~0)
#define IPC_PORT_VALID(port) \
	((port) != IPC_PORT_NULL && (port) != IPC_PORT_DEAD)

typedef ipc_port_t 		mach_port_t;

#else	/* KERNEL_PRIVATE */

/* 
 *	mach_port_t - a named port right
 *
 *	In user-space, "rights" are represented by the name of the
 *	right in the Mach port namespace.  Even so, this type is
 *	presented as a unique one to more clearly denote the presence
 *	of a right coming along with the name. 
 *
 *	Often, various rights for a port held in a single name space
 *	will coalesce and are, therefore, be identified by a single name
 *	[this is the case for send and receive rights].  But not
 *	always [send-once rights currently get a unique name for
 *	each right].      
 *
 */

#ifndef _MACH_PORT_T
#define _MACH_PORT_T
typedef mach_port_name_t 		mach_port_t;
#endif

#endif	/* KERNEL_PRIVATE */

typedef mach_port_t			*mach_port_array_t;

/*
 *  MACH_PORT_NULL is a legal value that can be carried in messages.
 *  It indicates the absence of any port or port rights.  (A port
 *  argument keeps the message from being "simple", even if the
 *  value is MACH_PORT_NULL.)  The value MACH_PORT_DEAD is also a legal
 *  value that can be carried in messages.  It indicates
 *  that a port right was present, but it died.
 */

#define MACH_PORT_NULL		0  /* intentional loose typing */
#define MACH_PORT_DEAD		((mach_port_name_t) ~0)
#define MACH_PORT_VALID(name)				\
		(((name) != MACH_PORT_NULL) && 		\
		 ((name) != MACH_PORT_DEAD))


/*
 *	For kernel-selected [assigned] port names, the name is
 *	comprised of two parts: a generation number and an index.
 *	This approach keeps the exact same name from being generated
 *	and reused too quickly [to catch right/reference counting bugs].
 *	The dividing line between the constituent parts is exposed so
 *	that efficient "mach_port_name_t to data structure pointer"
 *	conversion implementation can be made.  But it is possible
 *	for user-level code to assign their own names to Mach ports.
 *	These are not required to participate in this algorithm.  So
 *	care should be taken before "assuming" this model.
 *
 */

#ifndef	NO_PORT_GEN

#define	MACH_PORT_INDEX(name)		((name) >> 8)
#define	MACH_PORT_GEN(name)		(((name) & 0xff) << 24)
#define	MACH_PORT_MAKE(index, gen)	\
		(((index) << 8) | (gen) >> 24)

#else	/* NO_PORT_GEN */

#define	MACH_PORT_INDEX(name)		(name)
#define	MACH_PORT_GEN(name)		(0)
#define	MACH_PORT_MAKE(index, gen)	(index)

#endif	/* NO_PORT_GEN */


/*
 *  These are the different rights a task may have for a port.
 *  The MACH_PORT_RIGHT_* definitions are used as arguments
 *  to mach_port_allocate, mach_port_get_refs, etc, to specify
 *  a particular right to act upon.  The mach_port_names and
 *  mach_port_type calls return bitmasks using the MACH_PORT_TYPE_*
 *  definitions.  This is because a single name may denote
 *  multiple rights.
 */

typedef natural_t mach_port_right_t;

#define MACH_PORT_RIGHT_SEND		((mach_port_right_t) 0)
#define MACH_PORT_RIGHT_RECEIVE		((mach_port_right_t) 1)
#define MACH_PORT_RIGHT_SEND_ONCE	((mach_port_right_t) 2)
#define MACH_PORT_RIGHT_PORT_SET	((mach_port_right_t) 3)
#define MACH_PORT_RIGHT_DEAD_NAME	((mach_port_right_t) 4)
#define MACH_PORT_RIGHT_NUMBER		((mach_port_right_t) 5)

typedef natural_t mach_port_type_t;
typedef mach_port_type_t *mach_port_type_array_t;

#define MACH_PORT_TYPE(right)						\
		((mach_port_type_t)(((mach_port_type_t) 1)  		\
		<< ((right) + ((mach_port_right_t) 16))))	
#define MACH_PORT_TYPE_NONE	    ((mach_port_type_t) 0L)
#define MACH_PORT_TYPE_SEND	    MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND)
#define MACH_PORT_TYPE_RECEIVE	    MACH_PORT_TYPE(MACH_PORT_RIGHT_RECEIVE)
#define MACH_PORT_TYPE_SEND_ONCE    MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND_ONCE)
#define MACH_PORT_TYPE_PORT_SET	    MACH_PORT_TYPE(MACH_PORT_RIGHT_PORT_SET)
#define MACH_PORT_TYPE_DEAD_NAME    MACH_PORT_TYPE(MACH_PORT_RIGHT_DEAD_NAME)

/* Convenient combinations. */

#define MACH_PORT_TYPE_SEND_RECEIVE					\
		(MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_RECEIVE)
#define	MACH_PORT_TYPE_SEND_RIGHTS					\
		(MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_SEND_ONCE)
#define	MACH_PORT_TYPE_PORT_RIGHTS					\
		(MACH_PORT_TYPE_SEND_RIGHTS|MACH_PORT_TYPE_RECEIVE)
#define	MACH_PORT_TYPE_PORT_OR_DEAD					\
		(MACH_PORT_TYPE_PORT_RIGHTS|MACH_PORT_TYPE_DEAD_NAME)
#define MACH_PORT_TYPE_ALL_RIGHTS					\
		(MACH_PORT_TYPE_PORT_OR_DEAD|MACH_PORT_TYPE_PORT_SET)

/* Dummy type bits that mach_port_type/mach_port_names can return. */

#define MACH_PORT_TYPE_DNREQUEST	0x80000000

/* User-references for capabilities. */

typedef natural_t mach_port_urefs_t;
typedef integer_t mach_port_delta_t;			/* change in urefs */

/* Attributes of ports.  (See mach_port_get_receive_status.) */

typedef natural_t mach_port_seqno_t;		/* sequence number */
typedef natural_t mach_port_mscount_t;		/* make-send count */
typedef natural_t mach_port_msgcount_t;		/* number of msgs */
typedef natural_t mach_port_rights_t;		/* number of rights */

/*
 *	Are there outstanding send rights for a given port?
 */
#define	MACH_PORT_SRIGHTS_NONE		0		/* no srights */
#define	MACH_PORT_SRIGHTS_PRESENT	1		/* srights */
typedef unsigned int mach_port_srights_t;	/* status of send rights */

typedef struct mach_port_status {
	mach_port_name_t	mps_pset;	/* containing port set */
	mach_port_seqno_t	mps_seqno;	/* sequence number */
	mach_port_mscount_t	mps_mscount;	/* make-send count */
	mach_port_msgcount_t	mps_qlimit;	/* queue limit */
	mach_port_msgcount_t	mps_msgcount;	/* number in the queue */
	mach_port_rights_t	mps_sorights;	/* how many send-once rights */
	boolean_t		mps_srights;	/* do send rights exist? */
	boolean_t		mps_pdrequest;	/* port-deleted requested? */
	boolean_t		mps_nsrequest;	/* no-senders requested? */
	natural_t		mps_flags;		/* port flags */
} mach_port_status_t;

#define MACH_PORT_QLIMIT_DEFAULT	((mach_port_msgcount_t) 5)
#define MACH_PORT_QLIMIT_MAX	((mach_port_msgcount_t) 16)

typedef struct mach_port_limits {
	mach_port_msgcount_t	mpl_qlimit;	/* number of msgs */
} mach_port_limits_t;

typedef integer_t *mach_port_info_t;		/* varying array of natural_t */

/* Flavors for mach_port_get/set_attributes() */
typedef int	mach_port_flavor_t;
#define MACH_PORT_LIMITS_INFO		1	/* uses mach_port_status_t */
#define MACH_PORT_RECEIVE_STATUS	2	/* uses mach_port_limits_t */
#define MACH_PORT_DNREQUESTS_SIZE	3	/* info is int */

#define MACH_PORT_LIMITS_INFO_COUNT	((natural_t) \
	(sizeof(mach_port_limits_t)/sizeof(natural_t)))
#define MACH_PORT_RECEIVE_STATUS_COUNT	((natural_t) \
	(sizeof(mach_port_status_t)/sizeof(natural_t)))
#define MACH_PORT_DNREQUESTS_SIZE_COUNT 1

/*
 * Structure used to pass information about port allocation requests.
 * Must be padded to 64-bits total length.
 */
typedef struct mach_port_qos {
	boolean_t		name:1;		/* name given */
	boolean_t		prealloc:1;	/* prealloced message */
	boolean_t		pad1:30;
	natural_t		len;
} mach_port_qos_t;

#if	!defined(_POSIX_C_SOURCE) && !defined(_NO_PORT_T_FROM_MACH)
/*
 *  Mach 3.0 renamed everything to have mach_ in front of it.
 *  These types and macros are provided for backward compatibility
 *	but are deprecated.
 */
typedef mach_port_t		port_t;
typedef mach_port_name_t	port_name_t;
typedef mach_port_name_t	*port_name_array_t;

#define PORT_NULL		((port_t) 0)
#define PORT_DEAD		((port_t) ~0)
#define PORT_VALID(name) \
		((port_t)(name) != PORT_NULL && (port_t)(name) != PORT_DEAD)

#endif	/* !_POSIX_C_SOURCE && !_NO_PORT_T_FROM_MACH */

#endif	/* _MACH_PORT_H_ */
Commit	Line	Data
1c79356b	1	/*
91447636	2	* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
37839358 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
37839358 A	12	* This Original Code and all software distributed under the License are
37839358 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
37839358 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* @OSF_COPYRIGHT@
	24	*/
	25	/*
	26	* Mach Operating System
	27	* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
	28	* All Rights Reserved.
	29	*
	30	* Permission to use, copy, modify and distribute this software and its
	31	* documentation is hereby granted, provided that both the copyright
	32	* notice and this permission notice appear in all copies of the
	33	* software, derivative works or modified versions, and any portions
	34	* thereof, and that both notices appear in supporting documentation.
	35	*
	36	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	37	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	38	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	39	*
	40	* Carnegie Mellon requests users of this software to return to
	41	*
	42	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	43	* School of Computer Science
	44	* Carnegie Mellon University
	45	* Pittsburgh PA 15213-3890
	46	*
	47	* any improvements or extensions that they make and grant Carnegie Mellon
	48	* the rights to redistribute these changes.
	49	*/
	50	/*
	51	*/
	52	/*
	53	* File: mach/port.h
	54	*
91447636 A	55	* Definition of a Mach port
	56	*
	57	* Mach ports are the endpoints to Mach-implemented communications
	58	* channels (usually uni-directional message queues, but other types
	59	* also exist).
	60	*
	61	* Unique collections of these endpoints are maintained for each
	62	* Mach task. Each Mach port in the task's collection is given a
	63	* [task-local] name to identify it - and the the various "rights"
	64	* held by the task for that specific endpoint.
	65	*
	66	* This header defines the types used to identify these Mach ports
	67	* and the various rights associated with them. For more info see:
	68	*
	69	* <mach/mach_port.h> - manipulation of port rights in a given space
	70	* <mach/message.h> - message queue [and port right passing] mechanism
1c79356b	71	*
1c79356b A	72	*/
	73
	74	#ifndef _MACH_PORT_H_
	75	#define _MACH_PORT_H_
	76
9bccf70c	77	#include <stdint.h>
1c79356b A	78	#include <mach/boolean.h>
	79	#include <mach/machine/vm_types.h>
	80
	81	/*
91447636	82	* mach_port_name_t - the local identity for a Mach port
1c79356b	83	*
91447636 A	84	* The name is Mach port namespace specific. It is used to
	85	* identify the rights held for that port by the task whose
	86	* namespace is implied [or specifically provided].
1c79356b	87	*
91447636 A	88	* Use of this type usually implies just a name - no rights.
91447636 A	89	* See mach_port_t for a type that implies a "named right."
9bccf70c	90	*
1c79356b	91	*/
91447636 A	92
	93	typedef natural_t mach_port_name_t;
	94	typedef mach_port_name_t *mach_port_name_array_t;
1c79356b	95
91447636 A	96	#ifdef KERNEL_PRIVATE
	97
	98	/*
	99	* mach_port_t - a named port right
	100	*
	101	* In the kernel, "rights" are represented [named] by pointers to
	102	* the ipc port object in question. There is no port namespace for the
	103	* rights to be collected.
	104	*
	105	* Actually, there is namespace for the kernel task. But most kernel
	106	* code - including, but not limited to, Mach IPC code - lives in the
	107	* limbo between the current user-level task and the "next" task. Very
	108	* little of the kernel code runs in full kernel task context. So very
	109	* little of it gets to use the kernel task's port name space.
	110	*
	111	* Because of this implementation approach, all in-kernel rights for
	112	* a given port coalesce [have the same name/pointer]. The actual
	113	* references are counted in the port itself. It is up to the kernel
	114	* code in question to "just remember" how many [and what type of]
	115	* rights it holds and handle them appropriately.
	116	*
	117	*/
1c79356b	118
91447636	119	#ifndef MACH_KERNEL_PRIVATE
9bccf70c	120	/*
91447636 A	121	* For kernel code that resides outside of Mach proper, we opaque the
91447636 A	122	* port structure definition.
9bccf70c A	123	*/
	124	struct ipc_port ;
	125
91447636	126	#endif /* MACH_KERNEL_PRIVATE */
9bccf70c A	127
9bccf70c A	128	typedef struct ipc_port *ipc_port_t;
9bccf70c	129
91447636 A	130	#define IPC_PORT_NULL ((ipc_port_t) 0)
	131	#define IPC_PORT_DEAD ((ipc_port_t)~0)
	132	#define IPC_PORT_VALID(port) \
	133	((port) != IPC_PORT_NULL && (port) != IPC_PORT_DEAD)
1c79356b	134
91447636	135	typedef ipc_port_t mach_port_t;
1c79356b	136
91447636	137	#else /* KERNEL_PRIVATE */
1c79356b	138
91447636 A	139	/*
	140	* mach_port_t - a named port right
	141	*
	142	* In user-space, "rights" are represented by the name of the
	143	* right in the Mach port namespace. Even so, this type is
	144	* presented as a unique one to more clearly denote the presence
	145	* of a right coming along with the name.
	146	*
	147	* Often, various rights for a port held in a single name space
	148	* will coalesce and are, therefore, be identified by a single name
	149	* [this is the case for send and receive rights]. But not
	150	* always [send-once rights currently get a unique name for
	151	* each right].
	152	*
	153	*/
	154
	155	#ifndef _MACH_PORT_T
	156	#define _MACH_PORT_T
	157	typedef mach_port_name_t mach_port_t;
	158	#endif
	159
	160	#endif /* KERNEL_PRIVATE */
	161
	162	typedef mach_port_t *mach_port_array_t;
1c79356b A	163
1c79356b A	164	/*
91447636	165	* MACH_PORT_NULL is a legal value that can be carried in messages.
1c79356b A	166	* It indicates the absence of any port or port rights. (A port
1c79356b A	167	* argument keeps the message from being "simple", even if the
91447636	168	* value is MACH_PORT_NULL.) The value MACH_PORT_DEAD is also a legal
1c79356b A	169	* value that can be carried in messages. It indicates
	170	* that a port right was present, but it died.
	171	*/
1c79356b A	172
	173	#define MACH_PORT_NULL 0 /* intentional loose typing */
	174	#define MACH_PORT_DEAD ((mach_port_name_t) ~0)
	175	#define MACH_PORT_VALID(name) \
	176	(((name) != MACH_PORT_NULL) && \
	177	((name) != MACH_PORT_DEAD))
	178
91447636	179
1c79356b	180	/*
91447636 A	181	* For kernel-selected [assigned] port names, the name is
	182	* comprised of two parts: a generation number and an index.
	183	* This approach keeps the exact same name from being generated
	184	* and reused too quickly [to catch right/reference counting bugs].
	185	* The dividing line between the constituent parts is exposed so
	186	* that efficient "mach_port_name_t to data structure pointer"
	187	* conversion implementation can be made. But it is possible
	188	* for user-level code to assign their own names to Mach ports.
	189	* These are not required to participate in this algorithm. So
	190	* care should be taken before "assuming" this model.
1c79356b	191	*
1c79356b	192	*/
91447636 A	193
	194	#ifndef NO_PORT_GEN
	195
1c79356b A	196	#define MACH_PORT_INDEX(name) ((name) >> 8)
	197	#define MACH_PORT_GEN(name) (((name) & 0xff) << 24)
	198	#define MACH_PORT_MAKE(index, gen) \
	199	(((index) << 8) \| (gen) >> 24)
91447636 A	200
	201	#else /* NO_PORT_GEN */
	202
1c79356b A	203	#define MACH_PORT_INDEX(name) (name)
	204	#define MACH_PORT_GEN(name) (0)
	205	#define MACH_PORT_MAKE(index, gen) (index)
91447636 A	206
	207	#endif /* NO_PORT_GEN */
	208
1c79356b A	209
1c79356b A	210	/*
91447636	211	* These are the different rights a task may have for a port.
1c79356b A	212	* The MACH_PORT_RIGHT_* definitions are used as arguments
	213	* to mach_port_allocate, mach_port_get_refs, etc, to specify
	214	* a particular right to act upon. The mach_port_names and
	215	* mach_port_type calls return bitmasks using the MACH_PORT_TYPE_*
	216	* definitions. This is because a single name may denote
	217	* multiple rights.
	218	*/
	219
	220	typedef natural_t mach_port_right_t;
	221
	222	#define MACH_PORT_RIGHT_SEND ((mach_port_right_t) 0)
	223	#define MACH_PORT_RIGHT_RECEIVE ((mach_port_right_t) 1)
	224	#define MACH_PORT_RIGHT_SEND_ONCE ((mach_port_right_t) 2)
	225	#define MACH_PORT_RIGHT_PORT_SET ((mach_port_right_t) 3)
	226	#define MACH_PORT_RIGHT_DEAD_NAME ((mach_port_right_t) 4)
	227	#define MACH_PORT_RIGHT_NUMBER ((mach_port_right_t) 5)
	228
	229	typedef natural_t mach_port_type_t;
	230	typedef mach_port_type_t *mach_port_type_array_t;
	231
	232	#define MACH_PORT_TYPE(right) \
	233	((mach_port_type_t)(((mach_port_type_t) 1) \
	234	<< ((right) + ((mach_port_right_t) 16))))
	235	#define MACH_PORT_TYPE_NONE ((mach_port_type_t) 0L)
	236	#define MACH_PORT_TYPE_SEND MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND)
	237	#define MACH_PORT_TYPE_RECEIVE MACH_PORT_TYPE(MACH_PORT_RIGHT_RECEIVE)
	238	#define MACH_PORT_TYPE_SEND_ONCE MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND_ONCE)
	239	#define MACH_PORT_TYPE_PORT_SET MACH_PORT_TYPE(MACH_PORT_RIGHT_PORT_SET)
	240	#define MACH_PORT_TYPE_DEAD_NAME MACH_PORT_TYPE(MACH_PORT_RIGHT_DEAD_NAME)
	241
	242	/* Convenient combinations. */
	243
	244	#define MACH_PORT_TYPE_SEND_RECEIVE \
	245	(MACH_PORT_TYPE_SEND\|MACH_PORT_TYPE_RECEIVE)
	246	#define MACH_PORT_TYPE_SEND_RIGHTS \
	247	(MACH_PORT_TYPE_SEND\|MACH_PORT_TYPE_SEND_ONCE)
	248	#define MACH_PORT_TYPE_PORT_RIGHTS \
	249	(MACH_PORT_TYPE_SEND_RIGHTS\|MACH_PORT_TYPE_RECEIVE)
	250	#define MACH_PORT_TYPE_PORT_OR_DEAD \
	251	(MACH_PORT_TYPE_PORT_RIGHTS\|MACH_PORT_TYPE_DEAD_NAME)
	252	#define MACH_PORT_TYPE_ALL_RIGHTS \
	253	(MACH_PORT_TYPE_PORT_OR_DEAD\|MACH_PORT_TYPE_PORT_SET)
	254
	255	/* Dummy type bits that mach_port_type/mach_port_names can return. */
	256
	257	#define MACH_PORT_TYPE_DNREQUEST 0x80000000
	258
	259	/* User-references for capabilities. */
	260
	261	typedef natural_t mach_port_urefs_t;
	262	typedef integer_t mach_port_delta_t; /* change in urefs */
	263
	264	/* Attributes of ports. (See mach_port_get_receive_status.) */
	265
	266	typedef natural_t mach_port_seqno_t; /* sequence number */
	267	typedef natural_t mach_port_mscount_t; /* make-send count */
	268	typedef natural_t mach_port_msgcount_t; /* number of msgs */
	269	typedef natural_t mach_port_rights_t; /* number of rights */
	270
	271	/*
9bccf70c	272	* Are there outstanding send rights for a given port?
1c79356b	273	*/
9bccf70c A	274	#define MACH_PORT_SRIGHTS_NONE 0 /* no srights */
9bccf70c A	275	#define MACH_PORT_SRIGHTS_PRESENT 1 /* srights */
1c79356b A	276	typedef unsigned int mach_port_srights_t; /* status of send rights */
	277
	278	typedef struct mach_port_status {
	279	mach_port_name_t mps_pset; /* containing port set */
	280	mach_port_seqno_t mps_seqno; /* sequence number */
	281	mach_port_mscount_t mps_mscount; /* make-send count */
	282	mach_port_msgcount_t mps_qlimit; /* queue limit */
	283	mach_port_msgcount_t mps_msgcount; /* number in the queue */
	284	mach_port_rights_t mps_sorights; /* how many send-once rights */
	285	boolean_t mps_srights; /* do send rights exist? */
	286	boolean_t mps_pdrequest; /* port-deleted requested? */
	287	boolean_t mps_nsrequest; /* no-senders requested? */
91447636	288	natural_t mps_flags; /* port flags */
1c79356b A	289	} mach_port_status_t;
	290
	291	#define MACH_PORT_QLIMIT_DEFAULT ((mach_port_msgcount_t) 5)
91447636	292	#define MACH_PORT_QLIMIT_MAX ((mach_port_msgcount_t) 16)
1c79356b A	293
	294	typedef struct mach_port_limits {
	295	mach_port_msgcount_t mpl_qlimit; /* number of msgs */
	296	} mach_port_limits_t;
	297
	298	typedef integer_t mach_port_info_t; / varying array of natural_t */
	299
	300	/* Flavors for mach_port_get/set_attributes() */
	301	typedef int mach_port_flavor_t;
	302	#define MACH_PORT_LIMITS_INFO 1 /* uses mach_port_status_t */
	303	#define MACH_PORT_RECEIVE_STATUS 2 /* uses mach_port_limits_t */
	304	#define MACH_PORT_DNREQUESTS_SIZE 3 /* info is int */
	305
91447636 A	306	#define MACH_PORT_LIMITS_INFO_COUNT ((natural_t) \
	307	(sizeof(mach_port_limits_t)/sizeof(natural_t)))
	308	#define MACH_PORT_RECEIVE_STATUS_COUNT ((natural_t) \
	309	(sizeof(mach_port_status_t)/sizeof(natural_t)))
1c79356b A	310	#define MACH_PORT_DNREQUESTS_SIZE_COUNT 1
	311
	312	/*
	313	* Structure used to pass information about port allocation requests.
	314	* Must be padded to 64-bits total length.
	315	*/
1c79356b A	316	typedef struct mach_port_qos {
	317	boolean_t name:1; /* name given */
	318	boolean_t prealloc:1; /* prealloced message */
	319	boolean_t pad1:30;
	320	natural_t len;
	321	} mach_port_qos_t;
	322
91447636 A	323	#if !defined(_POSIX_C_SOURCE) && !defined(_NO_PORT_T_FROM_MACH)
	324	/*
	325	* Mach 3.0 renamed everything to have mach_ in front of it.
	326	* These types and macros are provided for backward compatibility
	327	* but are deprecated.
	328	*/
	329	typedef mach_port_t port_t;
	330	typedef mach_port_name_t port_name_t;
	331	typedef mach_port_name_t *port_name_array_t;
	332
	333	#define PORT_NULL ((port_t) 0)
	334	#define PORT_DEAD ((port_t) ~0)
	335	#define PORT_VALID(name) \
	336	((port_t)(name) != PORT_NULL && (port_t)(name) != PORT_DEAD)
	337
	338	#endif /* !_POSIX_C_SOURCE && !_NO_PORT_T_FROM_MACH */
	339
1c79356b	340	#endif /* _MACH_PORT_H_ */