ReactOS  0.4.14-dev-98-gb0d4763
device.h
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1 /* @(#)device.h 1.19 09/11/16 Copyright 1995-2007 J. Schilling */
2 /*
3  * Generic header for users of major(), minor() and makedev()
4  *
5  * Copyright (c) 1995-2007 J. Schilling
6  */
7 /*
8  * The contents of this file are subject to the terms of the
9  * Common Development and Distribution License, Version 1.0 only
10  * (the "License"). You may not use this file except in compliance
11  * with the License.
12  *
13  * See the file CDDL.Schily.txt in this distribution for details.
14  *
15  * When distributing Covered Code, include this CDDL HEADER in each
16  * file and include the License file CDDL.Schily.txt from this distribution.
17  */
18 
19 #ifndef _SCHILY_DEVICE_H
20 #define _SCHILY_DEVICE_H
21 
22 #ifndef _SCHILY_MCONFIG_H
23 #include <schily/mconfig.h>
24 #endif
25 
26 /*
27  * On generic SVR4, major is a function (defined in sys/mkdev.h).
28  * On Solaris it is defined ...
29  * As we cannot just test if major is #define'd, we have to
30  * define _FOUND_MAJOR_ instead.
31  *
32  * WARNING: Do never include <sys/sysmacros.h> in SVR4, it contains
33  * an old definition for major()/minor() defining 8 minorbits.
34  * Use <sys/mkdev.h> instead.
35  */
36 #ifndef _SCHILY_TYPES_H
37 #include <schily/types.h>
38 #endif
39 
40 /*
41  * Some systems define major in <sys/types.h>.
42  * We are ready...
43  */
44 #ifdef major
45 # define _FOUND_MAJOR_
46 #endif
47 
48 #ifdef MAJOR_IN_MKDEV
49 # ifndef _INCL_SYS_MKDEV_H
50 # include <sys/mkdev.h>
51 # define _INCL_SYS_MKDEV_H
52 # endif
53  /*
54  * Interix doesn't use makedev(); it uses mkdev()
55  */
56 # if !defined(makedev) && defined(mkdev)
57 # define makedev(a, b) mkdev((a), (b))
58 # endif
59 # define _FOUND_MAJOR_
60 #endif
61 
62 #ifndef _FOUND_MAJOR_
63 # ifdef MAJOR_IN_SYSMACROS
64 # ifndef _INCL_SYS_SYSMACROS_H
65 # include <sys/sysmacros.h>
66 # define _INCL_SYS_SYSMACROS_H
67 # endif
68 # define _FOUND_MAJOR_
69 # endif
70 #endif
71 
72 /*
73  * If we are on HP/UX before HP/UX 8,
74  * major/minor are not in <sys/sysmacros.h>.
75  */
76 #ifndef _FOUND_MAJOR_
77 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
78 # ifndef _INCL_SYS_MKOD_H
79 # include <sys/mknod.h>
80 # define _INCL_SYS_MKOD_H
81 # endif
82 # define _FOUND_MAJOR_
83 # endif
84 #endif
85 
86 #ifndef _FOUND_MAJOR_
87 # ifdef VMS
88 # define major(dev) (((((long)dev) >> 8) & 0xFF))
89 # define minor(dev) ((((long)dev) & 0xFF))
90 # define makedev(majo, mino) (((majo) << 8) | (mino))
91 # define _FOUND_MAJOR_
92 # endif /* VMS */
93 #endif /* _FOUND_MAJOR_ */
94 
95 #ifdef __cplusplus
96 extern "C" {
97 #endif
98 
99 /*
100  * For all other systems define major()/minor() here.
101  * XXX Check if this definition will be usefull for ms dos too.
102  */
103 #ifndef _FOUND_MAJOR_
104 # define major(dev) (((dev) >> 8) & 0xFF)
105 # define minor(dev) ((dev) & 0xFF)
106 # define makedev(majo, mino) (((majo) << 8) | (mino))
107 #endif
108 
109 /*
110  * Don't pollute namespace...
111  */
112 #undef _FOUND_MAJOR_
113 
114 #ifdef __XDEV__
115 /*
116  * The following defines are currently only needed for 'star'.
117  * We make it conditional code to avoid to pollute the namespace.
118  */
119 #define XDEV_T unsigned long
120 
121 extern int minorbits;
122 extern XDEV_T minormask;
123 extern XDEV_T _dev_mask[];
124 
125 #define dev_major(dev) (((XDEV_T)(dev)) >> minorbits)
126 #define _dev_major(mbits, dev) (((XDEV_T)(dev)) >> (mbits))
127 
128 #define dev_minor(dev) (((XDEV_T)(dev)) & minormask)
129 #define _dev_minor(mbits, dev) (((XDEV_T)(dev)) & _dev_mask[(mbits)])
130 
131 
132 #define dev_make(majo, mino) ((((XDEV_T)(majo)) << minorbits) | \
133  ((XDEV_T)(mino)))
134 #define _dev_make(mbits, majo, mino) ((((XDEV_T)(majo)) << (mbits) | \
135  ((XDEV_T)(mino)))
136 
137 extern void dev_init __PR((BOOL debug));
138 #ifndef dev_major
139 extern XDEV_T dev_major __PR((XDEV_T dev));
140 extern XDEV_T _dev_major __PR((int mbits, XDEV_T dev));
141 extern XDEV_T dev_minor __PR((XDEV_T dev));
142 extern XDEV_T _dev_minor __PR((int mbits, XDEV_T dev));
143 extern XDEV_T dev_make __PR((XDEV_T majo, XDEV_T mino));
144 extern XDEV_T _dev_make __PR((int mbits, XDEV_T majo, XDEV_T mino));
145 #endif
146 
147 #endif /* __XDEV__ */
148 
149 #ifdef __cplusplus
150 }
151 #endif
152 
153 #endif /* _SCHILY_DEVICE_H */
#define __PR(a)
Definition: prototyp.h:106
unsigned int BOOL
Definition: ntddk_ex.h:94
#define debug(msg)
Definition: key_call.c:71