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- /*
- * Copyright (c) 2000 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 port
- *
- * [The basic port_t type should probably be machine-dependent,
- * as it must be represented by a 32-bit integer.]
- */
-
- #ifndef _MACH_PORT_H_
- #define _MACH_PORT_H_
-
- #include <mach/boolean.h>
- #include <mach/machine/vm_types.h>
-
- /*
- * A port_name_t is a 32 bit value which represents a name of a
- * port right within some ipc space. This is a constant definition
- * everywhere.
- *
- * The type port_t represents a reference added or deleted to a
- * port right.
- *
- * At user space, this is represented by returning the name of
- * the right(s) that got altered within the user's ipc space.
- * So a port_t is the same type as a port_name_t there.
- *
- * Since there is no right space for the kernel proper (all rights
- * are naked rights) these rights are represented by passing a
- * pointer to the specific ipc_object_t subclass (typically
- * ipc_port_t) that got altered/is to be altered.
- */
- typedef natural_t port_name_t;
- typedef port_name_t *port_name_array_t;
-
-
- typedef port_name_t port_t;
-
-
- /*
- * 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 PORT_NULL.) The value 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 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))
-
- /*
- * Mach 3.0 renamed everything to have mach_ in front of it.
- * Do that mapping here, so we have the types and macros in
- * both formats.
- */
- typedef port_t mach_port_t;
- typedef port_t *mach_port_array_t;
- typedef port_name_t mach_port_name_t;
- typedef mach_port_name_t *mach_port_name_array_t;
-
- #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))
-
- /*
- * mach_port_name_t must be an unsigned type. Port values
- * have two parts, a generation number and an index.
- * These macros encapsulate all knowledge of how
- * a mach_port_name_t is laid out. They are made visible
- * to user tasks so that packages to map from a mach_port_name_t
- * to associated user data can discount the generation
- * nuber (if desired) in doing the mapping.
- *
- * Within the kernel, ipc/ipc_entry.c implicitly assumes
- * when it uses the splay tree functions that the generation
- * number is in the low bits, so that names are ordered first
- * by index and then by generation. If the size of generation
- * numbers changes, be sure to update IE_BITS_GEN_MASK and
- * friends in ipc/ipc_entry.h.
- */
- #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
- #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.
- * 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 */
-
- /*
- * A port may have NMS detection enabled, in which case
- * it tracks outstanding send rights. Otherwise, there
- * is no information available about outstanding srights.
- * The return values are deliberately chosen to match
- * the old boolean (0=FALSE=no srights, 1=TRUE=srights,
- * 2=xxx=no information available).
- */
- #define MACH_PORT_SRIGHTS_NONE 0 /* NMS: no srights */
- #define MACH_PORT_SRIGHTS_PRESENT 1 /* NMS: srights */
- #define MACH_PORT_SRIGHTS_NO_INFO 2 /* no NMS */
- 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? */
- unsigned int 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 \
- (sizeof(mach_port_limits_t)/sizeof(natural_t))
- #define MACH_PORT_RECEIVE_STATUS_COUNT \
- (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;
-
- #endif /* _MACH_PORT_H_ */
-