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/*
* Copyright (c) 2000-2005 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,
* 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_OSREFERENCE_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/message.h
*
* Mach IPC message and primitive function definitions.
*/
#ifndef _MACH_MESSAGE_H_
#define _MACH_MESSAGE_H_
#include <stdint.h>
#include <mach/port.h>
#include <mach/boolean.h>
#include <mach/kern_return.h>
#include <mach/machine/vm_types.h>
#include <sys/cdefs.h>
/*
* The timeout mechanism uses mach_msg_timeout_t values,
* passed by value. The timeout units are milliseconds.
* It is controlled with the MACH_SEND_TIMEOUT
* and MACH_RCV_TIMEOUT options.
*/
typedef natural_t mach_msg_timeout_t;
/*
* The value to be used when there is no timeout.
* (No MACH_SEND_TIMEOUT/MACH_RCV_TIMEOUT option.)
*/
#define MACH_MSG_TIMEOUT_NONE ((mach_msg_timeout_t) 0)
/*
* The kernel uses MACH_MSGH_BITS_COMPLEX as a hint. It it isn't on, it
* assumes the body of the message doesn't contain port rights or OOL
* data. The field is set in received messages. A user task must
* use caution in interpreting the body of a message if the bit isn't
* on, because the mach_msg_type's in the body might "lie" about the
* contents. If the bit isn't on, but the mach_msg_types
* in the body specify rights or OOL data, the behavior is undefined.
* (Ie, an error may or may not be produced.)
*
* The value of MACH_MSGH_BITS_REMOTE determines the interpretation
* of the msgh_remote_port field. It is handled like a msgt_name.
*
* The value of MACH_MSGH_BITS_LOCAL determines the interpretation
* of the msgh_local_port field. It is handled like a msgt_name.
*
* MACH_MSGH_BITS() combines two MACH_MSG_TYPE_* values, for the remote
* and local fields, into a single value suitable for msgh_bits.
*
* MACH_MSGH_BITS_CIRCULAR should be zero; is is used internally.
*
* The unused bits should be zero and are reserved for the kernel
* or for future interface expansion.
*/
#define MACH_MSGH_BITS_ZERO 0x00000000
#define MACH_MSGH_BITS_REMOTE_MASK 0x000000ff
#define MACH_MSGH_BITS_LOCAL_MASK 0x0000ff00
#define MACH_MSGH_BITS_COMPLEX 0x80000000U
#define MACH_MSGH_BITS_USER 0x8000ffffU
#define MACH_MSGH_BITS_CIRCULAR 0x40000000 /* internal use only */
#define MACH_MSGH_BITS_USED 0xc000ffffU
#define MACH_MSGH_BITS_PORTS_MASK \
(MACH_MSGH_BITS_REMOTE_MASK|MACH_MSGH_BITS_LOCAL_MASK)
#define MACH_MSGH_BITS(remote, local) \
((remote) | ((local) << 8))
#define MACH_MSGH_BITS_REMOTE(bits) \
((bits) & MACH_MSGH_BITS_REMOTE_MASK)
#define MACH_MSGH_BITS_LOCAL(bits) \
(((bits) & MACH_MSGH_BITS_LOCAL_MASK) >> 8)
#define MACH_MSGH_BITS_PORTS(bits) \
((bits) & MACH_MSGH_BITS_PORTS_MASK)
#define MACH_MSGH_BITS_OTHER(bits) \
((bits) &~ MACH_MSGH_BITS_PORTS_MASK)
/*
* Every message starts with a message header.
* Following the message header are zero or more pairs of
* type descriptors (mach_msg_type_t/mach_msg_type_long_t) and
* data values. The size of the message must be specified in bytes,
* and includes the message header, type descriptors, inline
* data, and inline pointer for out-of-line data.
*
* The msgh_remote_port field specifies the destination of the message.
* It must specify a valid send or send-once right for a port.
*
* The msgh_local_port field specifies a "reply port". Normally,
* This field carries a send-once right that the receiver will use
* to reply to the message. It may carry the values MACH_PORT_NULL,
* MACH_PORT_DEAD, a send-once right, or a send right.
*
* The msgh_seqno field carries a sequence number associated with the
* received-from port. A port's sequence number is incremented every
* time a message is received from it. In sent messages, the field's
* value is ignored.
*
* The msgh_id field is uninterpreted by the message primitives.
* It normally carries information specifying the format
* or meaning of the message.
*/
typedef unsigned int mach_msg_bits_t;
typedef natural_t mach_msg_size_t;
typedef integer_t mach_msg_id_t;
#define MACH_MSG_SIZE_NULL (mach_msg_size_t *) 0
typedef unsigned int mach_msg_type_name_t;
#define MACH_MSG_TYPE_MOVE_RECEIVE 16 /* Must hold receive rights */
#define MACH_MSG_TYPE_MOVE_SEND 17 /* Must hold send rights */
#define MACH_MSG_TYPE_MOVE_SEND_ONCE 18 /* Must hold sendonce rights */
#define MACH_MSG_TYPE_COPY_SEND 19 /* Must hold send rights */
#define MACH_MSG_TYPE_MAKE_SEND 20 /* Must hold receive rights */
#define MACH_MSG_TYPE_MAKE_SEND_ONCE 21 /* Must hold receive rights */
#define MACH_MSG_TYPE_COPY_RECEIVE 22 /* Must hold receive rights */
typedef unsigned int mach_msg_copy_options_t;
#define MACH_MSG_PHYSICAL_COPY 0
#define MACH_MSG_VIRTUAL_COPY 1
#define MACH_MSG_ALLOCATE 2
#define MACH_MSG_OVERWRITE 3
#ifdef MACH_KERNEL
#define MACH_MSG_KALLOC_COPY_T 4
#endif /* MACH_KERNEL */
typedef unsigned int mach_msg_descriptor_type_t;
#define MACH_MSG_PORT_DESCRIPTOR 0
#define MACH_MSG_OOL_DESCRIPTOR 1
#define MACH_MSG_OOL_PORTS_DESCRIPTOR 2
#define MACH_MSG_OOL_VOLATILE_DESCRIPTOR 3
#pragma pack(4)
typedef struct
{
natural_t pad1;
mach_msg_size_t pad2;
unsigned int pad3 : 24;
mach_msg_descriptor_type_t type : 8;
} mach_msg_type_descriptor_t;
typedef struct
{
mach_port_t name;
mach_msg_size_t pad1;
unsigned int pad2 : 16;
mach_msg_type_name_t disposition : 8;
mach_msg_descriptor_type_t type : 8;
} mach_msg_port_descriptor_t;
typedef struct
{
uint32_t address;
mach_msg_size_t size;
boolean_t deallocate: 8;
mach_msg_copy_options_t copy: 8;
unsigned int pad1: 8;
mach_msg_descriptor_type_t type: 8;
} mach_msg_ool_descriptor32_t;
typedef struct
{
uint64_t address;
boolean_t deallocate: 8;
mach_msg_copy_options_t copy: 8;
unsigned int pad1: 8;
mach_msg_descriptor_type_t type: 8;
mach_msg_size_t size;
} mach_msg_ool_descriptor64_t;
typedef struct
{
void* address;
#if !defined(__LP64__)
mach_msg_size_t size;
#endif
boolean_t deallocate: 8;
mach_msg_copy_options_t copy: 8;
unsigned int pad1: 8;
mach_msg_descriptor_type_t type: 8;
#if defined(__LP64__)
mach_msg_size_t size;
#endif
} mach_msg_ool_descriptor_t;
typedef struct
{
uint32_t address;
mach_msg_size_t count;
boolean_t deallocate: 8;
mach_msg_copy_options_t copy: 8;
mach_msg_type_name_t disposition : 8;
mach_msg_descriptor_type_t type : 8;
} mach_msg_ool_ports_descriptor32_t;
typedef struct
{
uint64_t address;
boolean_t deallocate: 8;
mach_msg_copy_options_t copy: 8;
mach_msg_type_name_t disposition : 8;
mach_msg_descriptor_type_t type : 8;
mach_msg_size_t count;
} mach_msg_ool_ports_descriptor64_t;
typedef struct
{
void* address;
#if !defined(__LP64__)
mach_msg_size_t count;
#endif
boolean_t deallocate: 8;
mach_msg_copy_options_t copy: 8;
mach_msg_type_name_t disposition : 8;
mach_msg_descriptor_type_t type : 8;
#if defined(__LP64__)
mach_msg_size_t count;
#endif
} mach_msg_ool_ports_descriptor_t;
/*
* LP64support - This union definition is not really
* appropriate in LP64 mode because not all descriptors
* are of the same size in that environment.
*/
typedef union
{
mach_msg_port_descriptor_t port;
mach_msg_ool_descriptor_t out_of_line;
mach_msg_ool_ports_descriptor_t ool_ports;
mach_msg_type_descriptor_t type;
} mach_msg_descriptor_t;
typedef struct
{
mach_msg_size_t msgh_descriptor_count;
} mach_msg_body_t;
#define MACH_MSG_BODY_NULL (mach_msg_body_t *) 0
#define MACH_MSG_DESCRIPTOR_NULL (mach_msg_descriptor_t *) 0
typedef struct
{
mach_msg_bits_t msgh_bits;
mach_msg_size_t msgh_size;
mach_port_t msgh_remote_port;
mach_port_t msgh_local_port;
mach_msg_size_t msgh_reserved;
mach_msg_id_t msgh_id;
} mach_msg_header_t;
#define MACH_MSG_NULL (mach_msg_header_t *) 0
typedef struct
{
mach_msg_header_t header;
mach_msg_body_t body;
} mach_msg_base_t;
typedef unsigned int mach_msg_trailer_type_t;
#define MACH_MSG_TRAILER_FORMAT_0 0
typedef unsigned int mach_msg_trailer_size_t;
typedef struct
{
mach_msg_trailer_type_t msgh_trailer_type;
mach_msg_trailer_size_t msgh_trailer_size;
} mach_msg_trailer_t;
typedef struct
{
mach_msg_trailer_type_t msgh_trailer_type;
mach_msg_trailer_size_t msgh_trailer_size;
mach_port_seqno_t msgh_seqno;
} mach_msg_seqno_trailer_t;
typedef struct
{
unsigned int val[2];
} security_token_t;
typedef struct
{
mach_msg_trailer_type_t msgh_trailer_type;
mach_msg_trailer_size_t msgh_trailer_size;
mach_port_seqno_t msgh_seqno;
security_token_t msgh_sender;
} mach_msg_security_trailer_t;
/*
* The audit token is an opaque token which identifies
* Mach tasks and senders of Mach messages as subjects
* to the BSM audit system. Only the appropriate BSM
* library routines should be used to interpret the
* contents of the audit token as the representation
* of the subject identity within the token may change
* over time.
*/
typedef struct
{
unsigned int val[8];
} audit_token_t;
typedef struct
{
mach_msg_trailer_type_t msgh_trailer_type;
mach_msg_trailer_size_t msgh_trailer_size;
mach_port_seqno_t msgh_seqno;
security_token_t msgh_sender;
audit_token_t msgh_audit;
} mach_msg_audit_trailer_t;
#define MACH_MSG_TRAILER_MINIMUM_SIZE sizeof(mach_msg_trailer_t)
/*
* These values can change from release to release - but clearly
* code cannot request additional trailer elements one was not
* compiled to understand. Therefore, it is safe to use this
* constant when the same module specified the receive options.
* Otherwise, you run the risk that the options requested by
* another module may exceed the local modules notion of
* MAX_TRAILER_SIZE.
*/
typedef mach_msg_audit_trailer_t mach_msg_max_trailer_t;
#define MAX_TRAILER_SIZE sizeof(mach_msg_max_trailer_t)
/*
* Legacy requirements keep us from ever updating these defines (even
* when the format_0 trailers gain new option data fields in the future).
* Therefore, they shouldn't be used going forward. Instead, the sizes
* should be compared against the specific element size requested using
* REQUESTED_TRAILER_SIZE.
*/
typedef mach_msg_security_trailer_t mach_msg_format_0_trailer_t;
#define MACH_MSG_TRAILER_FORMAT_0_SIZE sizeof(mach_msg_format_0_trailer_t)
#define KERNEL_SECURITY_TOKEN_VALUE { {0, 1} }
extern security_token_t KERNEL_SECURITY_TOKEN;
#define KERNEL_AUDIT_TOKEN_VALUE { {0, 0, 0, 0, 0, 0, 0, 0} }
extern audit_token_t KERNEL_AUDIT_TOKEN;
typedef integer_t mach_msg_options_t;
typedef struct
{
mach_msg_header_t header;
} mach_msg_empty_send_t;
typedef struct
{
mach_msg_header_t header;
mach_msg_trailer_t trailer;
} mach_msg_empty_rcv_t;
typedef union
{
mach_msg_empty_send_t send;
mach_msg_empty_rcv_t rcv;
} mach_msg_empty_t;
#pragma pack()
/* utility to round the message size - will become machine dependent */
#define round_msg(x) (((mach_msg_size_t)(x) + sizeof (natural_t) - 1) & \
~(sizeof (natural_t) - 1))
/*
* There is no fixed upper bound to the size of Mach messages.
*/
#define MACH_MSG_SIZE_MAX ((mach_msg_size_t) ~0)
/*
* Compatibility definitions, for code written
* when there was a msgh_kind instead of msgh_seqno.
*/
#define MACH_MSGH_KIND_NORMAL 0x00000000
#define MACH_MSGH_KIND_NOTIFICATION 0x00000001
#define msgh_kind msgh_seqno
#define mach_msg_kind_t mach_port_seqno_t
/*
* The msgt_number field specifies the number of data elements.
* The msgt_size field specifies the size of each data element, in bits.
* The msgt_name field specifies the type of each data element.
* If msgt_inline is TRUE, the data follows the type descriptor
* in the body of the message. If msgt_inline is FALSE, then a pointer
* to the data should follow the type descriptor, and the data is
* sent out-of-line. In this case, if msgt_deallocate is TRUE,
* then the out-of-line data is moved (instead of copied) into the message.
* If msgt_longform is TRUE, then the type descriptor is actually
* a mach_msg_type_long_t.
*
* The actual amount of inline data following the descriptor must
* a multiple of the word size. For out-of-line data, this is a
* pointer. For inline data, the supplied data size (calculated
* from msgt_number/msgt_size) is rounded up. This guarantees
* that type descriptors always fall on word boundaries.
*
* For port rights, msgt_size must be 8*sizeof(mach_port_t).
* If the data is inline, msgt_deallocate should be FALSE.
* The msgt_unused bit should be zero.
* The msgt_name, msgt_size, msgt_number fields in
* a mach_msg_type_long_t should be zero.
*/
typedef natural_t mach_msg_type_size_t;
typedef natural_t mach_msg_type_number_t;
/*
* Values received/carried in messages. Tells the receiver what
* sort of port right he now has.
*
* MACH_MSG_TYPE_PORT_NAME is used to transfer a port name
* which should remain uninterpreted by the kernel. (Port rights
* are not transferred, just the port name.)
*/
#define MACH_MSG_TYPE_PORT_NONE 0
#define MACH_MSG_TYPE_PORT_NAME 15
#define MACH_MSG_TYPE_PORT_RECEIVE MACH_MSG_TYPE_MOVE_RECEIVE
#define MACH_MSG_TYPE_PORT_SEND MACH_MSG_TYPE_MOVE_SEND
#define MACH_MSG_TYPE_PORT_SEND_ONCE MACH_MSG_TYPE_MOVE_SEND_ONCE
#define MACH_MSG_TYPE_LAST 22 /* Last assigned */
/*
* A dummy value. Mostly used to indicate that the actual value
* will be filled in later, dynamically.
*/
#define MACH_MSG_TYPE_POLYMORPHIC ((mach_msg_type_name_t) -1)
/*
* Is a given item a port type?
*/
#define MACH_MSG_TYPE_PORT_ANY(x) \
(((x) >= MACH_MSG_TYPE_MOVE_RECEIVE) && \
((x) <= MACH_MSG_TYPE_MAKE_SEND_ONCE))
#define MACH_MSG_TYPE_PORT_ANY_SEND(x) \
(((x) >= MACH_MSG_TYPE_MOVE_SEND) && \
((x) <= MACH_MSG_TYPE_MAKE_SEND_ONCE))
#define MACH_MSG_TYPE_PORT_ANY_RIGHT(x) \
(((x) >= MACH_MSG_TYPE_MOVE_RECEIVE) && \
((x) <= MACH_MSG_TYPE_MOVE_SEND_ONCE))
typedef integer_t mach_msg_option_t;
#define MACH_MSG_OPTION_NONE 0x00000000
#define MACH_SEND_MSG 0x00000001
#define MACH_RCV_MSG 0x00000002
#define MACH_RCV_LARGE 0x00000004
#define MACH_SEND_TIMEOUT 0x00000010
#define MACH_SEND_INTERRUPT 0x00000040 /* libmach implements */
#define MACH_SEND_CANCEL 0x00000080
#define MACH_SEND_ALWAYS 0x00010000 /* internal use only */
#define MACH_SEND_TRAILER 0x00020000
#define MACH_RCV_TIMEOUT 0x00000100
#define MACH_RCV_NOTIFY 0x00000200
#define MACH_RCV_INTERRUPT 0x00000400 /* libmach implements */
#define MACH_RCV_OVERWRITE 0x00001000
/*
* NOTE: a 0x00------ RCV mask implies to ask for
* a MACH_MSG_TRAILER_FORMAT_0 with 0 Elements,
* which is equivalent to a mach_msg_trailer_t.
*/
#define MACH_RCV_TRAILER_NULL 0
#define MACH_RCV_TRAILER_SEQNO 1
#define MACH_RCV_TRAILER_SENDER 2
#define MACH_RCV_TRAILER_AUDIT 3
#define MACH_RCV_TRAILER_TYPE(x) (((x) & 0xf) << 28)
#define MACH_RCV_TRAILER_ELEMENTS(x) (((x) & 0xf) << 24)
#define MACH_RCV_TRAILER_MASK ((0xff << 24))
#define GET_RCV_ELEMENTS(y) (((y) >> 24) & 0xf)
#define REQUESTED_TRAILER_SIZE(y) \
((mach_msg_trailer_size_t) \
((GET_RCV_ELEMENTS(y) == MACH_RCV_TRAILER_NULL) ? \
sizeof(mach_msg_trailer_t) : \
((GET_RCV_ELEMENTS(y) == MACH_RCV_TRAILER_SEQNO) ? \
sizeof(mach_msg_seqno_trailer_t) : \
((GET_RCV_ELEMENTS(y) == MACH_RCV_TRAILER_SENDER) ? \
sizeof(mach_msg_security_trailer_t) : \
sizeof(mach_msg_audit_trailer_t)))))
/*
* Much code assumes that mach_msg_return_t == kern_return_t.
* This definition is useful for descriptive purposes.
*
* See <mach/error.h> for the format of error codes.
* IPC errors are system 4. Send errors are subsystem 0;
* receive errors are subsystem 1. The code field is always non-zero.
* The high bits of the code field communicate extra information
* for some error codes. MACH_MSG_MASK masks off these special bits.
*/
typedef kern_return_t mach_msg_return_t;
#define MACH_MSG_SUCCESS 0x00000000
#define MACH_MSG_MASK 0x00003e00
/* All special error code bits defined below. */
#define MACH_MSG_IPC_SPACE 0x00002000
/* No room in IPC name space for another capability name. */
#define MACH_MSG_VM_SPACE 0x00001000
/* No room in VM address space for out-of-line memory. */
#define MACH_MSG_IPC_KERNEL 0x00000800
/* Kernel resource shortage handling an IPC capability. */
#define MACH_MSG_VM_KERNEL 0x00000400
/* Kernel resource shortage handling out-of-line memory. */
#define MACH_SEND_IN_PROGRESS 0x10000001
/* Thread is waiting to send. (Internal use only.) */
#define MACH_SEND_INVALID_DATA 0x10000002
/* Bogus in-line data. */
#define MACH_SEND_INVALID_DEST 0x10000003
/* Bogus destination port. */
#define MACH_SEND_TIMED_OUT 0x10000004
/* Message not sent before timeout expired. */
#define MACH_SEND_INTERRUPTED 0x10000007
/* Software interrupt. */
#define MACH_SEND_MSG_TOO_SMALL 0x10000008
/* Data doesn't contain a complete message. */
#define MACH_SEND_INVALID_REPLY 0x10000009
/* Bogus reply port. */
#define MACH_SEND_INVALID_RIGHT 0x1000000a
/* Bogus port rights in the message body. */
#define MACH_SEND_INVALID_NOTIFY 0x1000000b
/* Bogus notify port argument. */
#define MACH_SEND_INVALID_MEMORY 0x1000000c
/* Invalid out-of-line memory pointer. */
#define MACH_SEND_NO_BUFFER 0x1000000d
/* No message buffer is available. */
#define MACH_SEND_TOO_LARGE 0x1000000e
/* Send is too large for port */
#define MACH_SEND_INVALID_TYPE 0x1000000f
/* Invalid msg-type specification. */
#define MACH_SEND_INVALID_HEADER 0x10000010
/* A field in the header had a bad value. */
#define MACH_SEND_INVALID_TRAILER 0x10000011
/* The trailer to be sent does not match kernel format. */
#define MACH_SEND_INVALID_RT_OOL_SIZE 0x10000015
/* compatibility: no longer a returned error */
#define MACH_RCV_IN_PROGRESS 0x10004001
/* Thread is waiting for receive. (Internal use only.) */
#define MACH_RCV_INVALID_NAME 0x10004002
/* Bogus name for receive port/port-set. */
#define MACH_RCV_TIMED_OUT 0x10004003
/* Didn't get a message within the timeout value. */
#define MACH_RCV_TOO_LARGE 0x10004004
/* Message buffer is not large enough for inline data. */
#define MACH_RCV_INTERRUPTED 0x10004005
/* Software interrupt. */
#define MACH_RCV_PORT_CHANGED 0x10004006
/* compatibility: no longer a returned error */
#define MACH_RCV_INVALID_NOTIFY 0x10004007
/* Bogus notify port argument. */
#define MACH_RCV_INVALID_DATA 0x10004008
/* Bogus message buffer for inline data. */
#define MACH_RCV_PORT_DIED 0x10004009
/* Port/set was sent away/died during receive. */
#define MACH_RCV_IN_SET 0x1000400a
/* compatibility: no longer a returned error */
#define MACH_RCV_HEADER_ERROR 0x1000400b
/* Error receiving message header. See special bits. */
#define MACH_RCV_BODY_ERROR 0x1000400c
/* Error receiving message body. See special bits. */
#define MACH_RCV_INVALID_TYPE 0x1000400d
/* Invalid msg-type specification in scatter list. */
#define MACH_RCV_SCATTER_SMALL 0x1000400e
/* Out-of-line overwrite region is not large enough */
#define MACH_RCV_INVALID_TRAILER 0x1000400f
/* trailer type or number of trailer elements not supported */
#define MACH_RCV_IN_PROGRESS_TIMED 0x10004011
/* Waiting for receive with timeout. (Internal use only.) */
__BEGIN_DECLS
/*
* Routine: mach_msg_overwrite
* Purpose:
* Send and/or receive a message. If the message operation
* is interrupted, and the user did not request an indication
* of that fact, then restart the appropriate parts of the
* operation silently (trap version does not restart).
*
* Distinct send and receive buffers may be specified. If
* no separate receive buffer is specified, the msg parameter
* will be used for both send and receive operations.
*
* In addition to a distinct receive buffer, that buffer may
* already contain scatter control information to direct the
* receiving of the message.
*/
extern mach_msg_return_t mach_msg_overwrite(
mach_msg_header_t *msg,
mach_msg_option_t option,
mach_msg_size_t send_size,
mach_msg_size_t rcv_size,
mach_port_name_t rcv_name,
mach_msg_timeout_t timeout,
mach_port_name_t notify,
mach_msg_header_t *rcv_msg,
mach_msg_size_t rcv_limit);
#ifndef KERNEL
/*
* Routine: mach_msg
* Purpose:
* Send and/or receive a message. If the message operation
* is interrupted, and the user did not request an indication
* of that fact, then restart the appropriate parts of the
* operation silently (trap version does not restart).
*/
extern mach_msg_return_t mach_msg(
mach_msg_header_t *msg,
mach_msg_option_t option,
mach_msg_size_t send_size,
mach_msg_size_t rcv_size,
mach_port_name_t rcv_name,
mach_msg_timeout_t timeout,
mach_port_name_t notify);
#endif /* KERNEL */
__END_DECLS
#endif /* _MACH_MESSAGE_H_ */