![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ipc_space.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple Darwin 0.x] / kernel / ipc|
Return to ipc_space.h CVS log | Up to [Apple Darwin 0.x] / kernel / ipc |
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: * Copyright (c) 1995, 1994, 1993, 1992, 1991, 1990
27: * Open Software Foundation, Inc.
28: *
29: * Permission to use, copy, modify, and distribute this software and
30: * its documentation for any purpose and without fee is hereby granted,
31: * provided that the above copyright notice appears in all copies and
32: * that both the copyright notice and this permission notice appear in
33: * supporting documentation, and that the name of ("OSF") or Open Software
34: * Foundation not be used in advertising or publicity pertaining to
35: * distribution of the software without specific, written prior permission.
36: *
37: * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
38: * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
39: * FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL OSF BE LIABLE FOR ANY
40: * SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
41: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
42: * ACTION OF CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING
43: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE
44: */
45: /*
46: * OSF Research Institute MK6.1 (unencumbered) 1/31/1995
47: */
48: /*
49: * Mach Operating System
50: * Copyright (c) 1991,1990,1989 Carnegie Mellon University
51: * All Rights Reserved.
52: *
53: * Permission to use, copy, modify and distribute this software and its
54: * documentation is hereby granted, provided that both the copyright
55: * notice and this permission notice appear in all copies of the
56: * software, derivative works or modified versions, and any portions
57: * thereof, and that both notices appear in supporting documentation.
58: *
59: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
60: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
61: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
62: *
63: * Carnegie Mellon requests users of this software to return to
64: *
65: * Software Distribution Coordinator or [email protected]
66: * School of Computer Science
67: * Carnegie Mellon University
68: * Pittsburgh PA 15213-3890
69: *
70: * any improvements or extensions that they make and grant Carnegie Mellon
71: * the rights to redistribute these changes.
72: */
73: /*
74: * File: ipc/ipc_space.h
75: * Author: Rich Draves
76: * Date: 1989
77: *
78: * Definitions for IPC spaces of capabilities.
79: */
80:
81: #ifndef _IPC_IPC_SPACE_H_
82: #define _IPC_IPC_SPACE_H_
83:
84: #import <mach/features.h>
85:
86: #include <mach/boolean.h>
87: #include <mach/kern_return.h>
88: #include <kern/macro_help.h>
89: #include <kern/lock.h>
90: #include <kern/zalloc.h>
91: #include <ipc/ipc_entry.h>
92: #include <ipc/ipc_splay.h>
93: #include <ipc/ipc_types.h>
94:
95: /*
96: * Every task has a space of IPC capabilities.
97: * IPC operations like send and receive use this space.
98: * IPC kernel calls manipulate the space of the target task.
99: *
100: * Every space has a non-NULL is_table with is_table_size entries.
101: * A space may have a NULL is_tree. is_tree_small records the
102: * number of entries in the tree that, if the table were to grow
103: * to the next larger size, would move from the tree to the table.
104: *
105: * is_growing marks when the table is in the process of growing.
106: * When the table is growing, it can't be freed or grown by another
107: * thread, because of krealloc/kmem_realloc's requirements.
108: */
109:
110: typedef unsigned int ipc_space_refs_t;
111:
112: struct ipc_space {
113: decl_simple_lock_data(,is_ref_lock_data)
114: ipc_space_refs_t is_references;
115:
116: decl_simple_lock_data(,is_lock_data)
117: boolean_t is_active; /* is the space alive? */
118: boolean_t is_growing; /* is the space growing? */
119: ipc_entry_t is_table; /* an array of entries */
120: ipc_entry_num_t is_table_size; /* current size of table */
121: struct ipc_table_size *is_table_next; /* info for larger table */
122: struct ipc_splay_tree is_tree; /* a splay tree of entries */
123: ipc_entry_num_t is_tree_total; /* number of entries in the tree */
124: ipc_entry_num_t is_tree_small; /* # of small entries in the tree */
125: ipc_entry_num_t is_tree_hash; /* # of hashed entries in the tree */
126:
127: #if MACH_IPC_COMPAT
128: struct ipc_port *is_notify; /* notification port */
129: #endif /* MACH_IPC_COMPAT */
130: };
131:
132: #define IS_NULL ((ipc_space_t) 0)
133:
134: extern zone_t ipc_space_zone;
135:
136: #define is_alloc() ((ipc_space_t) zalloc(ipc_space_zone))
137: #define is_free(is) zfree(ipc_space_zone, (vm_offset_t) (is))
138:
139: extern ipc_space_t ipc_space_kernel;
140: extern ipc_space_t ipc_space_reply;
141:
142: #define is_ref_lock_init(is) simple_lock_init(&(is)->is_ref_lock_data)
143:
144: #define ipc_space_reference_macro(is) \
145: MACRO_BEGIN \
146: simple_lock(&(is)->is_ref_lock_data); \
147: assert((is)->is_references > 0); \
148: (is)->is_references++; \
149: simple_unlock(&(is)->is_ref_lock_data); \
150: MACRO_END
151:
152: #define ipc_space_release_macro(is) \
153: MACRO_BEGIN \
154: ipc_space_refs_t _refs; \
155: \
156: simple_lock(&(is)->is_ref_lock_data); \
157: assert((is)->is_references > 0); \
158: _refs = --(is)->is_references; \
159: simple_unlock(&(is)->is_ref_lock_data); \
160: \
161: if (_refs == 0) \
162: is_free(is); \
163: MACRO_END
164:
165: #define is_lock_init(is) simple_lock_init(&(is)->is_lock_data)
166:
167: #define is_read_lock(is) simple_lock(&(is)->is_lock_data)
168: #define is_read_unlock(is) simple_unlock(&(is)->is_lock_data)
169:
170: #define is_write_lock(is) simple_lock(&(is)->is_lock_data)
171: #define is_write_lock_try(is) simple_lock_try(&(is)->is_lock_data)
172: #define is_write_unlock(is) simple_unlock(&(is)->is_lock_data)
173:
174: #define is_write_to_read_lock(is)
175:
176: /* Take a reference on a space */
177: extern void ipc_space_reference(
178: ipc_space_t space);
179:
180: /* Realase a reference on a space */
181: extern void ipc_space_release(
182: ipc_space_t space);
183:
184: #define is_reference(is) ipc_space_reference(is)
185: #define is_release(is) ipc_space_release(is)
186:
187: /* Create new IPC space */
188: extern kern_return_t ipc_space_create(
189: ipc_table_size_t initial,
190: ipc_space_t *spacep);
191:
192: /* Create a special IPC space */
193: extern kern_return_t ipc_space_create_special(
194: ipc_space_t *spacep);
195:
196: /* Mark a space as dead and cleans up the entries*/
197: extern void ipc_space_destroy(
198: ipc_space_t space);
199:
200: #if MACH_IPC_COMPAT
201:
202: /*
203: * Routine: ipc_space_make_notify
204: * Purpose:
205: * Given a space, return a send right for a notification.
206: * May return IP_NULL/IP_DEAD.
207: * Conditions:
208: * The space is locked (read or write) and active.
209: *
210: * ipc_port_t
211: * ipc_space_make_notify(space)
212: * ipc_space_t space;
213: */
214:
215: #define ipc_space_make_notify(space) \
216: ipc_port_copy_send(space->is_notify)
217:
218: #endif /* MACH_IPC_COMPAT */
219:
220: #endif /* _IPC_IPC_SPACE_H_ */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.