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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /*
26: * Mach Operating System
27: * Copyright (c) 1991,1990,1989 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 [email protected]
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: * File: ipc/ipc_marequest.h
52: * Author: Rich Draves
53: * Date: 1989
54: *
55: * Definitions for msg-accepted requests.
56: */
57:
58: #ifndef _IPC_IPC_MAREQUEST_H_
59: #define _IPC_IPC_MAREQUEST_H_
60:
61: #import <mach/features.h>
62:
63: #include <mach/kern_return.h>
64: #include <mach/port.h>
65:
66: /*
67: * A msg-accepted request is made when MACH_SEND_NOTIFY is used
68: * to force a message to a send right. The IE_BITS_MAREQUEST bit
69: * in an entry indicates the entry is blocked because MACH_SEND_NOTIFY
70: * has already been used to force a message. The kmsg holds
71: * a pointer to the marequest; it is destroyed when the kmsg
72: * is received/destroyed. (If the send right is destroyed,
73: * this just changes imar_name. If the space is destroyed,
74: * the marequest is left unchanged.)
75: *
76: * Locking considerations: The imar_space field is read-only and
77: * points to the space which locks the imar_name field. imar_soright
78: * is read-only. Normally it is a non-null send-once right for
79: * the msg-accepted notification, but in compat mode it is null
80: * and the notification goes to the space's notify port. Normally
81: * imar_name is non-null, but if the send right is destroyed then
82: * it is changed to be null. imar_next is locked by a bucket lock;
83: * imar_name is read-only when the request is in a bucket. (So lookups
84: * in the bucket can safely check imar_space and imar_name.)
85: * imar_space and imar_soright both hold references.
86: */
87:
88: typedef struct ipc_marequest {
89: struct ipc_space *imar_space;
90: mach_port_t imar_name;
91: struct ipc_port *imar_soright;
92: struct ipc_marequest *imar_next;
93: } *ipc_marequest_t;
94:
95: #define IMAR_NULL ((ipc_marequest_t) 0)
96:
97:
98: extern void
99: ipc_marequest_init();
100:
101: #if MACH_IPC_DEBUG
102:
103: extern unsigned int
104: ipc_marequest_info(/* unsigned int *, hash_info_bucket_t *, unsigned int */);
105:
106: #endif /* MACH_IPC_DEBUG */
107:
108: extern mach_msg_return_t
109: ipc_marequest_create(/* ipc_space_t space, mach_port_t name,
110: ipc_port_t soright, ipc_marequest_t *marequestp */);
111:
112: extern void
113: ipc_marequest_cancel(/* ipc_space_t space, mach_port_t name */);
114:
115: extern void
116: ipc_marequest_rename(/* ipc_space_t space,
117: mach_port_t old, mach_port_t new */);
118:
119: extern void
120: ipc_marequest_destroy(/* ipc_marequest_t marequest */);
121:
122: #endif /* _IPC_IPC_MAREQUEST_H_ */
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