| 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 | |
