1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2012 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 /** |
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24 * @file begin_code.h |
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25 * This file sets things up for C dynamic library function definitions, |
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26 * static inlined functions, and structures aligned at 4-byte alignment. |
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27 * If you don't like ugly C preprocessor code, don't look at this file. :) |
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28 */ |
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29 |
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30 /** |
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31 * @file begin_code.h |
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32 * This shouldn't be nested -- included it around code only. |
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33 */ |
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34 #ifdef _begin_code_h |
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35 #error Nested inclusion of begin_code.h |
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36 #endif |
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37 #define _begin_code_h |
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38 |
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39 /** |
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40 * @def DECLSPEC |
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41 * Some compilers use a special export keyword |
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42 */ |
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43 #ifndef DECLSPEC |
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44 # if defined(__BEOS__) || defined(__HAIKU__) |
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45 # if defined(__GNUC__) |
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46 # define DECLSPEC |
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47 # else |
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48 # define DECLSPEC __declspec(export) |
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49 # endif |
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50 # elif defined(__WIN32__) |
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51 # ifdef __BORLANDC__ |
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52 # ifdef BUILD_SDL |
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53 # define DECLSPEC |
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54 # else |
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55 # define DECLSPEC __declspec(dllimport) |
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56 # endif |
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57 # else |
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58 # define DECLSPEC __declspec(dllexport) |
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59 # endif |
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60 # elif defined(__OS2__) |
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61 # ifdef __WATCOMC__ |
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62 # ifdef BUILD_SDL |
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63 # define DECLSPEC __declspec(dllexport) |
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64 # else |
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65 # define DECLSPEC |
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66 # endif |
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67 # elif defined (__GNUC__) && __GNUC__ < 4 |
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68 # /* Added support for GCC-EMX <v4.x */ |
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69 # /* this is needed for XFree86/OS2 developement */ |
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70 # /* F. Ambacher(anakor@snafu.de) 05.2008 */ |
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71 # ifdef BUILD_SDL |
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72 # define DECLSPEC __declspec(dllexport) |
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73 # else |
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74 # define DECLSPEC |
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75 # endif |
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76 # else |
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77 # define DECLSPEC |
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78 # endif |
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79 # else |
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80 # if defined(__GNUC__) && __GNUC__ >= 4 |
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81 # define DECLSPEC __attribute__ ((visibility("default"))) |
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82 # else |
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83 # define DECLSPEC |
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84 # endif |
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85 # endif |
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86 #endif |
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87 |
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88 /** |
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89 * @def SDLCALL |
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90 * By default SDL uses the C calling convention |
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91 */ |
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92 #ifndef SDLCALL |
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93 # if defined(__WIN32__) && !defined(__GNUC__) |
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94 # define SDLCALL __cdecl |
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95 # elif defined(__OS2__) |
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96 # if defined (__GNUC__) && __GNUC__ < 4 |
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97 # /* Added support for GCC-EMX <v4.x */ |
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98 # /* this is needed for XFree86/OS2 developement */ |
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99 # /* F. Ambacher(anakor@snafu.de) 05.2008 */ |
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100 # define SDLCALL _cdecl |
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101 # else |
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102 # /* On other compilers on OS/2, we use the _System calling convention */ |
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103 # /* to be compatible with every compiler */ |
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104 # define SDLCALL _System |
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105 # endif |
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106 # else |
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107 # define SDLCALL |
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108 # endif |
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109 #endif /* SDLCALL */ |
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110 |
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111 #ifdef __SYMBIAN32__ |
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112 #ifndef EKA2 |
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113 #undef DECLSPEC |
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114 #define DECLSPEC |
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115 #elif !defined(__WINS__) |
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116 #undef DECLSPEC |
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117 #define DECLSPEC __declspec(dllexport) |
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118 #endif /* !EKA2 */ |
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119 #endif /* __SYMBIAN32__ */ |
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120 |
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121 /** |
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122 * @file begin_code.h |
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123 * Force structure packing at 4 byte alignment. |
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124 * This is necessary if the header is included in code which has structure |
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125 * packing set to an alternate value, say for loading structures from disk. |
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126 * The packing is reset to the previous value in close_code.h |
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127 */ |
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128 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__) |
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129 #ifdef _MSC_VER |
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130 #pragma warning(disable: 4103) |
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131 #endif |
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132 #ifdef __BORLANDC__ |
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133 #pragma nopackwarning |
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134 #endif |
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135 #ifdef _M_X64 |
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136 /* Use 8-byte alignment on 64-bit architectures, so pointers are aligned */ |
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137 #pragma pack(push,8) |
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138 #else |
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139 #pragma pack(push,4) |
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140 #endif |
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141 #elif (defined(__MWERKS__) && defined(__MACOS__)) |
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142 #pragma options align=mac68k4byte |
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143 #pragma enumsalwaysint on |
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144 #endif /* Compiler needs structure packing set */ |
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145 |
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146 /** |
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147 * @def SDL_INLINE_OKAY |
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148 * Set up compiler-specific options for inlining functions |
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149 */ |
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150 #ifndef SDL_INLINE_OKAY |
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151 #ifdef __GNUC__ |
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152 #define SDL_INLINE_OKAY |
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153 #else |
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154 /* Add any special compiler-specific cases here */ |
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155 #if defined(_MSC_VER) || defined(__BORLANDC__) || \ |
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156 defined(__DMC__) || defined(__SC__) || \ |
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157 defined(__WATCOMC__) || defined(__LCC__) || \ |
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158 defined(__DECC) || defined(__EABI__) |
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159 #ifndef __inline__ |
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160 #define __inline__ __inline |
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161 #endif |
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162 #define SDL_INLINE_OKAY |
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163 #else |
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164 #if !defined(__MRC__) && !defined(_SGI_SOURCE) |
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165 #ifndef __inline__ |
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166 #define __inline__ inline |
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167 #endif |
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168 #define SDL_INLINE_OKAY |
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169 #endif /* Not a funky compiler */ |
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170 #endif /* Visual C++ */ |
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171 #endif /* GNU C */ |
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172 #endif /* SDL_INLINE_OKAY */ |
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173 |
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174 /** |
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175 * @def __inline__ |
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176 * If inlining isn't supported, remove "__inline__", turning static |
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177 * inlined functions into static functions (resulting in code bloat |
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178 * in all files which include the offending header files) |
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179 */ |
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180 #ifndef SDL_INLINE_OKAY |
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181 #define __inline__ |
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182 #endif |
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183 |
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184 /** |
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185 * @def NULL |
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186 * Apparently this is needed by several Windows compilers |
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187 */ |
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188 #if !defined(__MACH__) |
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189 #ifndef NULL |
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190 #ifdef __cplusplus |
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191 #define NULL 0 |
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192 #else |
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193 #define NULL ((void *)0) |
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194 #endif |
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195 #endif /* NULL */ |
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196 #endif /* ! Mac OS X - breaks precompiled headers */ |
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