1 /* $NetBSD: file.h,v 1.7 2021/12/19 10:39:06 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LINUX_FILE_H_
33 #define _LINUX_FILE_H_
34
35 #include <sys/param.h>
36 #include <sys/file.h>
37 #include <sys/filedesc.h>
38 #include <sys/proc.h>
39
40 struct file;
41
42 struct fd {
43 struct file *file;
44 int fd_number;
45 };
46
47 static inline struct fd
fdget(int number)48 fdget(int number)
49 {
50 struct fd fd;
51
52 fd.file = fd_getfile(number);
53 fd.fd_number = number;
54
55 return fd;
56 }
57
58 static inline void
fdput(struct fd fd)59 fdput(struct fd fd)
60 {
61
62 fd_putfile(fd.fd_number);
63 }
64
65 /* fget translates; fput(fp) doesn't because we have fd_putfile(fd). */
66 static inline struct file *
fget(int fd)67 fget(int fd)
68 {
69 return fd_getfile(fd);
70 }
71
72 static inline void
fd_install(int fd,struct file * fp)73 fd_install(int fd, struct file *fp)
74 {
75 fd_affix(curproc, fp, fd);
76 }
77
78 #endif /* _LINUX_FILE_H_ */
79