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annotate include/begin_code.h @ 630:550bccdf04bd

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Added initial support for RISC OS (thanks Peter Naulls!)
author Sam Lantinga <slouken@libsdl.org>
date Thu, 29 May 2003 04:44:13 +0000
parents a18ea34d9efe
children d9c2ab142f2f
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* This file sets things up for C dynamic library function definitions,
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24 static inlined functions, and structures aligned at 4-byte alignment.
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25 If you don't like ugly C preprocessor code, don't look at this file. :)
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26 */
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27
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28 /* This shouldn't be nested -- included it around code only. */
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29 #ifdef _begin_code_h
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30 #error Nested inclusion of begin_code.h
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31 #endif
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32 #define _begin_code_h
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33
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34 /* Make sure the correct platform symbols are defined */
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35 #if !defined(WIN32) && defined(_WIN32)
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36 #define WIN32
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37 #endif /* Windows */
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38
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39 /* Some compilers use a special export keyword */
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40 #ifndef DECLSPEC
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41 # ifdef __BEOS__
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42 # if defined(__GNUC__)
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43 # define DECLSPEC __declspec(dllexport)
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44 # else
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45 # define DECLSPEC __declspec(export)
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46 # endif
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47 # else
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48 # ifdef WIN32
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49 # ifdef __BORLANDC__
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50 # ifdef BUILD_SDL
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51 # define DECLSPEC __declspec(dllexport)
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52 # else
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53 # define DECLSPEC __declspec(dllimport)
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54 # endif
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55 # else
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56 # define DECLSPEC __declspec(dllexport)
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57 # endif
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58 # else
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59 # define DECLSPEC
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60 # endif
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61 # endif
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62 #endif
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63
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64 /* By default SDL uses the C calling convention */
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65 #ifndef SDLCALL
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66 #ifdef WIN32
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67 #define SDLCALL __cdecl
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68 #else
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69 #define SDLCALL
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70 #endif
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71 #endif /* SDLCALL */
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72
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73 /* Removed DECLSPEC on Symbian OS because SDL cannot be a DLL in EPOC */
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74 #ifdef __SYMBIAN32__
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75 #undef DECLSPEC
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76 #define DECLSPEC
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77 #endif /* __SYMBIAN32__ */
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78
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79 /* Force structure packing at 4 byte alignment.
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80 This is necessary if the header is included in code which has structure
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81 packing set to an alternate value, say for loading structures from disk.
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82 The packing is reset to the previous value in close_code.h
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83 */
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84 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)
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85 #ifdef _MSC_VER
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86 #pragma warning(disable: 4103)
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87 #endif
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88 #ifdef __BORLANDC__
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89 #pragma nopackwarning
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90 #endif
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91 #pragma pack(push,4)
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92 #elif (defined(__MWERKS__) && defined(macintosh))
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93 #pragma options align=mac68k4byte
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94 #pragma enumsalwaysint on
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95 #endif /* Compiler needs structure packing set */
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96
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97 /* Set up compiler-specific options for inlining functions */
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98 #ifndef SDL_INLINE_OKAY
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99 #ifdef __GNUC__
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100 #define SDL_INLINE_OKAY
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101 #else
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102 /* Add any special compiler-specific cases here */
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103 #if defined(_MSC_VER) || defined(__BORLANDC__) || \
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104 defined(__DMC__) || defined(__SC__) || \
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105 defined(__WATCOMC__) || defined(__LCC__)
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106 #ifndef __inline__
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107 #define __inline__ __inline
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108 #endif
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109 #define SDL_INLINE_OKAY
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110 #else
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111 #if !defined(__MRC__) && !defined(_SGI_SOURCE)
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112 #define __inline__ inline
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113 #define SDL_INLINE_OKAY
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114 #endif /* Not a funky compiler */
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115 #endif /* Visual C++ */
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116 #endif /* GNU C */
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117 #endif /* SDL_INLINE_OKAY */
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118
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119 /* If inlining isn't supported, remove "__inline__", turning static
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120 inlined functions into static functions (resulting in code bloat
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121 in all files which include the offending header files)
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122 */
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123 #ifndef SDL_INLINE_OKAY
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124 #define __inline__
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125 #endif
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126
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127 /* Apparently this is needed by several Windows compilers */
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128 #if !defined(__MACH__)
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129 #ifndef NULL
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130 #ifdef __cplusplus
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131 #define NULL 0
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132 #else
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133 #define NULL ((void *)0)
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134 #endif
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135 #endif /* NULL */
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136 #endif /* ! MacOS X - breaks precompiled headers */