1 | /*␊ |
2 | * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * This file contains Original Code and/or Modifications of Original Code␊ |
7 | * as defined in and that are subject to the Apple Public Source License␊ |
8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
9 | * compliance with the License. The rights granted to you under the License␊ |
10 | * may not be used to create, or enable the creation or redistribution of,␊ |
11 | * unlawful or unlicensed copies of an Apple operating system, or to␊ |
12 | * circumvent, violate, or enable the circumvention or violation of, any␊ |
13 | * terms of an Apple operating system software license agreement.␊ |
14 | * ␊ |
15 | * Please obtain a copy of the License at␊ |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file.␊ |
17 | * ␊ |
18 | * The Original Code and all software distributed under the License are␊ |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
23 | * Please see the License for the specific language governing rights and␊ |
24 | * limitations under the License.␊ |
25 | * ␊ |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
27 | */␊ |
28 | /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */␊ |
29 | /*␊ |
30 | * Copyright (c) 1990, 1993␊ |
31 | *␉The Regents of the University of California. All rights reserved.␊ |
32 | *␊ |
33 | * Redistribution and use in source and binary forms, with or without␊ |
34 | * modification, are permitted provided that the following conditions␊ |
35 | * are met:␊ |
36 | * 1. Redistributions of source code must retain the above copyright␊ |
37 | * notice, this list of conditions and the following disclaimer.␊ |
38 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
39 | * notice, this list of conditions and the following disclaimer in the␊ |
40 | * documentation and/or other materials provided with the distribution.␊ |
41 | * 3. All advertising materials mentioning features or use of this software␊ |
42 | * must display the following acknowledgement:␊ |
43 | *␉This product includes software developed by the University of␊ |
44 | *␉California, Berkeley and its contributors.␊ |
45 | * 4. Neither the name of the University nor the names of its contributors␊ |
46 | * may be used to endorse or promote products derived from this software␊ |
47 | * without specific prior written permission.␊ |
48 | *␊ |
49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND␊ |
50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE␊ |
53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
59 | * SUCH DAMAGE.␊ |
60 | *␊ |
61 | *␉@(#)filedesc.h␉8.1 (Berkeley) 6/2/93␊ |
62 | */␊ |
63 | ␊ |
64 | #ifndef _SYS_FILEDESC_H_␊ |
65 | #define␉_SYS_FILEDESC_H_␊ |
66 | ␊ |
67 | #include <sys/appleapiopts.h>␊ |
68 | ␊ |
69 | /*␊ |
70 | * This structure is used for the management of descriptors. It may be␊ |
71 | * shared by multiple processes.␊ |
72 | *␊ |
73 | * A process is initially started out with NDFILE descriptors [XXXstored within␊ |
74 | * this structureXXX], selected to be enough for typical applications based on␊ |
75 | * the historical limit of 20 open files (and the usage of descriptors by␊ |
76 | * shells). If these descriptors are exhausted, a larger descriptor table␊ |
77 | * may be allocated, up to a process' resource limit; [XXXthe internal arrays␊ |
78 | * are then unusedXXX]. The initial expansion is set to NDEXTENT; each time␊ |
79 | * it runs out, it is doubled until the resource limit is reached. NDEXTENT␊ |
80 | * should be selected to be the biggest multiple of OFILESIZE (see below)␊ |
81 | * that will fit in a power-of-two sized piece of memory.␊ |
82 | */␊ |
83 | #define NDFILE␉␉25␉␉/* 125 bytes */␊ |
84 | #define NDEXTENT␉50␉␉/* 250 bytes in 256-byte alloc. */ ␊ |
85 | ␊ |
86 | ␊ |
87 | #endif /* !_SYS_FILEDESC_H_ */␊ |
88 | |