![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to port.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 port.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_port.h
75: * Author: Rich Draves
76: * Date: 1989
77: *
78: * Implementation specific complement to mach/port.h.
79: */
80:
81: #ifndef _IPC_PORT_H_
82: #define _IPC_PORT_H_
83:
84: #include <mach/port.h>
85:
86: /*
87: * mach_port_t must be an unsigned type. Port values
88: * have two parts, a generation number and an index.
89: * These macros encapsulate all knowledge of how
90: * a mach_port_t is layed out. However, ipc/ipc_entry.c
91: * implicitly assumes when it uses the splay tree functions
92: * that the generation number is in the low bits, so that
93: * names are ordered first by index and then by generation.
94: *
95: * If the size of generation numbers changes,
96: * be sure to update IE_BITS_GEN_MASK and friends
97: * in ipc/ipc_entry.h.
98: */
99:
100: #define MACH_PORT_INDEX(name) ((name) >> 8)
101: #define MACH_PORT_GEN(name) (((name) & 0xff) << 24)
102: #define MACH_PORT_MAKE(index, gen) (((index) << 8) | ((gen) >> 24))
103:
104: #define MACH_PORT_NGEN(name) MACH_PORT_MAKE(0, MACH_PORT_GEN(name))
105: #define MACH_PORT_MAKEB(index, bits) \
106: MACH_PORT_MAKE(index, IE_BITS_GEN(bits))
107:
108: /*
109: * Typedefs for code cleanliness. These must all have
110: * the same (unsigned) type as mach_port_t.
111: */
112:
113: typedef mach_port_t mach_port_index_t; /* index values */
114: typedef mach_port_t mach_port_gen_t; /* generation numbers */
115:
116:
117: #define MACH_PORT_UREFS_MAX ((mach_port_urefs_t) ((1 << 16) - 1))
118:
119: #define MACH_PORT_UREFS_OVERFLOW(urefs, delta) \
120: (((delta) > 0) && \
121: ((((urefs) + (delta)) <= (urefs)) || \
122: (((urefs) + (delta)) > MACH_PORT_UREFS_MAX)))
123:
124: #define MACH_PORT_UREFS_UNDERFLOW(urefs, delta) \
125: (((delta) < 0) && (-(delta) > (urefs)))
126:
127: #endif /* _IPC_PORT_H_ */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.