tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*****************************************************************************
2**
3** machine.h
4**
5** Copyright (c) Cambridge Electronic Design Limited 1991,1992,2010
6**
7** This program is free software; you can redistribute it and/or
8** modify it under the terms of the GNU General Public License
9** as published by the Free Software Foundation; either version 2
10** of the License, or (at your option) any later version.
11**
12** This program is distributed in the hope that it will be useful,
13** but WITHOUT ANY WARRANTY; without even the implied warranty of
14** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15** GNU General Public License for more details.
16**
17** You should have received a copy of the GNU General Public License
18** along with this program; if not, write to the Free Software
19** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20**
21** Contact CED: Cambridge Electronic Design Limited, Science Park, Milton Road
22** Cambridge, CB6 0FE.
23** www.ced.co.uk
24** greg@ced.co.uk
25**
26** This file is included at the start of 'C' or 'C++' source file to define
27** things for cross-platform/compiler interoperability. This used to deal with
28** MSDOS/16-bit stuff, but this was all removed in Decemeber 2010. There are
29** three things to consider: Windows, LINUX, mac OSX (BSD Unix) and 32 vs 64
30** bit. At the time of writing (DEC 2010) there is a consensus on the following
31** and their unsigned equivalents:
32**
33** type bits
34** char 8
35** short 16
36** int 32
37** long long 64
38**
39** long is a problem as it is always 64 bits on linux/unix and is always 32 bits
40** on windows.
41** On windows, we define _IS_WINDOWS_ and one of WIN32 or WIN64.
42** On linux we define LINUX
43** On Max OSX we define MACOSX
44**
45*/
46
47#ifndef __MACHINE_H__
48#define __MACHINE_H__
49#ifndef __KERNEL__
50#include <float.h>
51#include <limits.h>
52#endif
53
54/*
55** The initial section is to identify the operating system
56*/
57#if (defined(__linux__) || defined(_linux) || defined(__linux)) && !defined(LINUX)
58#define LINUX 1
59#endif
60
61#if (defined(__WIN32__) || defined(_WIN32)) && !defined(WIN32)
62#define WIN32 1
63#endif
64
65#if defined(__APPLE__)
66#define MACOSX
67#endif
68
69#if defined(_WIN64)
70#undef WIN32
71#undef WIN64
72#define WIN64 1
73#endif
74
75#if defined(WIN32) || defined(WIN64)
76#define _IS_WINDOWS_ 1
77#endif
78
79#if defined(LINUX) || defined(MAXOSX)
80 #define FAR
81
82 typedef int BOOL; /* To match Windows */
83 typedef unsigned char BYTE;
84 #define __packed __attribute__((packed))
85 #define HIWORD(x) (unsigned short)(((x)>>16) & 0xffff)
86 #define LOWORD(x) (unsigned short)((x) & 0xffff)
87#endif
88
89#ifdef _IS_WINDOWS_
90#include <windows.h>
91#define __packed
92#endif
93
94/*
95** Sort out the DllExport and DllImport macros. The GCC compiler has its own
96** syntax for this, though it also supports the MS specific __declspec() as
97** a synonym.
98*/
99#ifdef GNUC
100 #define DllExport __attribute__((dllexport))
101 #define DllImport __attribute__((dllimport))
102#endif
103
104#ifndef DllExport
105#ifdef _IS_WINDOWS_
106 #define DllExport __declspec(dllexport)
107 #define DllImport __declspec(dllimport)
108#else
109 #define DllExport
110 #define DllImport
111#endif
112#endif /* _IS_WINDOWS_ */
113
114#ifndef TRUE
115 #define TRUE 1
116 #define FALSE 0
117#endif
118
119#endif