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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
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.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * HISTORY
27: *
28: * Revision 1.1.1.1 1998/09/22 21:05:28 wsanchez
29: * Import of Mac OS X kernel (~semeria)
30: *
31: * Revision 1.2 1998/05/29 23:50:33 youngwor
32: * Added infrastructure for shared port space support
33: *
34: * Revision 1.1.1.1 1998/03/07 02:26:16 wsanchez
35: * Import of OSF Mach kernel (~mburg)
36: *
37: * Revision 1.1.8.3 1995/01/06 19:46:05 devrcs
38: * mk6 CR668 - 1.3b26 merge
39: * 64bit cleanup
40: * [1994/10/14 03:41:41 dwm]
41: *
42: * Revision 1.1.8.2 1994/09/23 02:12:26 ezf
43: * change marker to not FREE
44: * [1994/09/22 21:30:53 ezf]
45: *
46: * Revision 1.1.8.1 1994/08/18 23:11:45 widyono
47: * RT IPC from RT2_SHARED
48: * [1994/08/18 15:49:24 widyono]
49: *
50: * Revision 1.1.6.1 1994/07/29 07:33:22 widyono
51: * Define default target size, ITS_SIZE_NONE
52: * [1994/07/28 22:27:01 widyono]
53: *
54: * Revision 1.1.2.4 1993/07/22 16:17:33 rod
55: * Add ANSI prototypes. CR #9523.
56: * [1993/07/22 13:33:33 rod]
57: *
58: * Revision 1.1.2.3 1993/06/07 22:11:46 jeffc
59: * CR9176 - ANSI C violations: trailing tokens on CPP
60: * directives, extra semicolons after decl_ ..., asm keywords
61: * [1993/06/07 19:02:58 jeffc]
62: *
63: * Revision 1.1.2.2 1993/06/02 23:34:02 jeffc
64: * Added to OSF/1 R1.3 from NMK15.0.
65: * [1993/06/02 21:11:17 jeffc]
66: *
67: * Revision 1.1 1992/09/30 02:29:14 robert
68: * Initial revision
69: *
70: * $EndLog$
71: */
72: /* CMU_HIST */
73: /*
74: * Revision 2.5 91/05/14 16:37:52 mrt
75: * Correcting copyright
76: *
77: * Revision 2.4 91/03/16 14:49:01 rpd
78: * Added ipc_table_realloc.
79: * [91/03/04 rpd]
80: *
81: * Revision 2.3 91/02/05 17:24:19 mrt
82: * Changed to new Mach copyright
83: * [91/02/01 15:52:19 mrt]
84: *
85: * Revision 2.2 90/06/02 14:52:02 rpd
86: * Created for new IPC.
87: * [90/03/26 21:04:35 rpd]
88: *
89: */
90: /* CMU_ENDHIST */
91: /*
92: * Mach Operating System
93: * Copyright (c) 1991,1990,1989 Carnegie Mellon University
94: * All Rights Reserved.
95: *
96: * Permission to use, copy, modify and distribute this software and its
97: * documentation is hereby granted, provided that both the copyright
98: * notice and this permission notice appear in all copies of the
99: * software, derivative works or modified versions, and any portions
100: * thereof, and that both notices appear in supporting documentation.
101: *
102: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
103: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
104: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
105: *
106: * Carnegie Mellon requests users of this software to return to
107: *
108: * Software Distribution Coordinator or [email protected]
109: * School of Computer Science
110: * Carnegie Mellon University
111: * Pittsburgh PA 15213-3890
112: *
113: * any improvements or extensions that they make and grant Carnegie Mellon
114: * the rights to redistribute these changes.
115: */
116: /*
117: */
118: /*
119: * File: ipc/ipc_table.h
120: * Author: Rich Draves
121: * Date: 1989
122: *
123: * Definitions for tables, used for IPC capabilities (ipc_entry_t)
124: * and dead-name requests (ipc_port_request_t).
125: */
126:
127: #ifndef _IPC_IPC_TABLE_H_
128: #define _IPC_IPC_TABLE_H_
129:
130: #include <mach/boolean.h>
131: #include <mach/vm_param.h>
132:
133: /*
134: * The is_table_next field of an ipc_space_t points to
135: * an ipc_table_size structure. These structures must
136: * be elements of an array, ipc_table_entries.
137: *
138: * The array must end with two elements with the same its_size value.
139: * Except for the terminating element, the its_size values must
140: * be strictly increasing. The largest (last) its_size value
141: * must be less than or equal to MACH_PORT_INDEX(MACH_PORT_DEAD).
142: * This ensures that
143: * 1) MACH_PORT_INDEX(MACH_PORT_DEAD) isn't a valid index
144: * in the table, so ipc_entry_get won't allocate it.
145: * 2) MACH_PORT_MAKE(index+1, 0) and MAKE_PORT_MAKE(size, 0)
146: * won't ever overflow.
147: *
148: *
149: * The ipr_size field of the first element in a table of
150: * dead-name requests (ipc_port_request_t) points to the
151: * ipc_table_size structure. The structures must be elements
152: * of ipc_table_dnrequests. ipc_table_dnrequests must end
153: * with an element with zero its_size, and except for this last
154: * element, the its_size values must be strictly increasing.
155: *
156: * The is_table_next field points to the ipc_table_size structure
157: * for the next larger size of table, not the one currently in use.
158: * The ipr_size field points to the currently used ipc_table_size.
159: */
160:
161: typedef natural_t ipc_table_index_t; /* index into tables */
162: typedef natural_t ipc_table_elems_t; /* size of tables */
163:
164: typedef struct ipc_table_size {
165: ipc_table_elems_t its_size; /* number of elements in table */
166: } *ipc_table_size_t;
167:
168: #define ITS_NULL ((ipc_table_size_t) 0)
169: #define ITS_SIZE_NONE -1
170:
171: extern ipc_table_size_t ipc_table_entries;
172: extern ipc_table_size_t ipc_table_dnrequests;
173:
174: /* Initialize IPC capabilities table storage */
175: extern void ipc_table_init(void);
176:
177: /*
178: * Note that ipc_table_alloc, ipc_table_realloc, and ipc_table_free
179: * all potentially use the VM system. Hence simple locks can't
180: * be held across them.
181: *
182: * We can't use a copying realloc, because the realloc happens
183: * with the data unlocked. ipc_table_realloc remaps the data,
184: * so it is OK.
185: */
186:
187: /* Allocate a table */
188: extern vm_offset_t ipc_table_alloc(
189: vm_size_t size);
190:
191: /* Reallocate a big table */
192: extern vm_offset_t ipc_table_realloc(
193: vm_size_t old_size,
194: vm_offset_t old_table,
195: vm_size_t new_size);
196:
197: /* Free a table */
198: extern void ipc_table_free(
199: vm_size_t size,
200: vm_offset_t table);
201:
202: #define it_entries_alloc(its) \
203: ((ipc_entry_t) \
204: ipc_table_alloc(round_page( \
205: (its)->its_size * sizeof(struct ipc_entry))))
206:
207: #define it_entries_reallocable(its) \
208: ((its)->its_size * sizeof(struct ipc_entry) \
209: >= PAGE_SIZE)
210:
211: #define it_entries_realloc(its, table, nits) \
212: ((ipc_entry_t) \
213: ipc_table_realloc( \
214: round_page((its)->its_size * sizeof(struct ipc_entry)), \
215: (vm_offset_t)(table), \
216: round_page((nits)->its_size * sizeof(struct ipc_entry)) \
217: ))
218:
219: #define it_entries_free(its, table) \
220: ipc_table_free( \
221: round_page((its)->its_size * sizeof(struct ipc_entry)), \
222: (vm_offset_t)(table) \
223: )
224:
225: #define it_dnrequests_alloc(its) \
226: ((ipc_port_request_t) \
227: ipc_table_alloc((its)->its_size * \
228: sizeof(struct ipc_port_request)))
229:
230: #define it_dnrequests_free(its, table) \
231: ipc_table_free((its)->its_size * \
232: sizeof(struct ipc_port_request), \
233: (vm_offset_t)(table))
234:
235: #endif /* _IPC_IPC_TABLE_H_ */
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