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1 | /* |
2 | Simple DirectMedia Layer | |
3 | Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org> | |
4 | ||
5 | This software is provided 'as-is', without any express or implied | |
6 | warranty. In no event will the authors be held liable for any damages | |
7 | arising from the use of this software. | |
8 | ||
9 | Permission is granted to anyone to use this software for any purpose, | |
10 | including commercial applications, and to alter it and redistribute it | |
11 | freely, subject to the following restrictions: | |
12 | ||
13 | 1. The origin of this software must not be misrepresented; you must not | |
14 | claim that you wrote the original software. If you use this software | |
15 | in a product, an acknowledgment in the product documentation would be | |
16 | appreciated but is not required. | |
17 | 2. Altered source versions must be plainly marked as such, and must not be | |
18 | misrepresented as being the original software. | |
19 | 3. This notice may not be removed or altered from any source distribution. | |
20 | */ | |
21 | ||
22 | /** | |
23 | * \file begin_code.h | |
24 | * | |
25 | * This file sets things up for C dynamic library function definitions, | |
26 | * static inlined functions, and structures aligned at 4-byte alignment. | |
27 | * If you don't like ugly C preprocessor code, don't look at this file. :) | |
28 | */ | |
29 | ||
30 | /* This shouldn't be nested -- included it around code only. */ | |
31 | #ifdef _begin_code_h | |
32 | #error Nested inclusion of begin_code.h | |
33 | #endif | |
34 | #define _begin_code_h | |
35 | ||
36 | /* Some compilers use a special export keyword */ | |
37 | #ifndef DECLSPEC | |
38 | # if defined(__BEOS__) || defined(__HAIKU__) | |
39 | # if defined(__GNUC__) | |
40 | # define DECLSPEC __declspec(dllexport) | |
41 | # else | |
42 | # define DECLSPEC __declspec(export) | |
43 | # endif | |
44 | # elif defined(__WIN32__) | |
45 | # ifdef __BORLANDC__ | |
46 | # ifdef BUILD_SDL | |
47 | # define DECLSPEC | |
48 | # else | |
49 | # define DECLSPEC __declspec(dllimport) | |
50 | # endif | |
51 | # else | |
52 | # define DECLSPEC __declspec(dllexport) | |
53 | # endif | |
54 | # else | |
55 | # if defined(__GNUC__) && __GNUC__ >= 4 | |
56 | # define DECLSPEC __attribute__ ((visibility("default"))) | |
57 | # else | |
58 | # define DECLSPEC | |
59 | # endif | |
60 | # endif | |
61 | #endif | |
62 | ||
63 | /* By default SDL uses the C calling convention */ | |
64 | #ifndef SDLCALL | |
65 | #if defined(__WIN32__) && !defined(__GNUC__) | |
66 | #define SDLCALL __cdecl | |
67 | #else | |
68 | #define SDLCALL | |
69 | #endif | |
70 | #endif /* SDLCALL */ | |
71 | ||
72 | /* Removed DECLSPEC on Symbian OS because SDL cannot be a DLL in EPOC */ | |
73 | #ifdef __SYMBIAN32__ | |
74 | #undef DECLSPEC | |
75 | #define DECLSPEC | |
76 | #endif /* __SYMBIAN32__ */ | |
77 | ||
78 | /* Force structure packing at 4 byte alignment. | |
79 | This is necessary if the header is included in code which has structure | |
80 | packing set to an alternate value, say for loading structures from disk. | |
81 | The packing is reset to the previous value in close_code.h | |
82 | */ | |
83 | #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__) | |
84 | #ifdef _MSC_VER | |
85 | #pragma warning(disable: 4103) | |
86 | #endif | |
87 | #ifdef __BORLANDC__ | |
88 | #pragma nopackwarning | |
89 | #endif | |
90 | #ifdef _M_X64 | |
91 | /* Use 8-byte alignment on 64-bit architectures, so pointers are aligned */ | |
92 | #pragma pack(push,8) | |
93 | #else | |
94 | #pragma pack(push,4) | |
95 | #endif | |
96 | #endif /* Compiler needs structure packing set */ | |
97 | ||
98 | /* Set up compiler-specific options for inlining functions */ | |
99 | #ifndef SDL_INLINE_OKAY | |
100 | #ifdef __GNUC__ | |
101 | #define SDL_INLINE_OKAY | |
102 | #else | |
103 | /* Add any special compiler-specific cases here */ | |
104 | #if defined(_MSC_VER) || defined(__BORLANDC__) || \ | |
105 | defined(__DMC__) || defined(__SC__) || \ | |
106 | defined(__WATCOMC__) || defined(__LCC__) || \ | |
107 | defined(__DECC) | |
108 | #ifndef __inline__ | |
109 | #define __inline__ __inline | |
110 | #endif | |
111 | #define SDL_INLINE_OKAY | |
112 | #else | |
113 | #if !defined(__MRC__) && !defined(_SGI_SOURCE) | |
114 | #ifndef __inline__ | |
115 | #define __inline__ inline | |
116 | #endif | |
117 | #define SDL_INLINE_OKAY | |
118 | #endif /* Not a funky compiler */ | |
119 | #endif /* Visual C++ */ | |
120 | #endif /* GNU C */ | |
121 | #endif /* SDL_INLINE_OKAY */ | |
122 | ||
123 | /* If inlining isn't supported, remove "__inline__", turning static | |
124 | inlined functions into static functions (resulting in code bloat | |
125 | in all files which include the offending header files) | |
126 | */ | |
127 | #ifndef SDL_INLINE_OKAY | |
128 | #define __inline__ | |
129 | #endif | |
130 | ||
131 | #ifndef SDL_FORCE_INLINE | |
132 | #if defined(_MSC_VER) | |
133 | #define SDL_FORCE_INLINE __forceinline | |
134 | #elif ( (defined(__GNUC__) && (__GNUC__ >= 4)) || defined(__clang__) ) | |
135 | #define SDL_FORCE_INLINE __attribute__((always_inline)) static inline | |
136 | #else | |
137 | #define SDL_FORCE_INLINE static __inline__ | |
138 | #endif | |
139 | #endif | |
140 | ||
141 | /* Apparently this is needed by several Windows compilers */ | |
142 | #if !defined(__MACH__) | |
143 | #ifndef NULL | |
144 | #ifdef __cplusplus | |
145 | #define NULL 0 | |
146 | #else | |
147 | #define NULL ((void *)0) | |
148 | #endif | |
149 | #endif /* NULL */ | |
150 | #endif /* ! Mac OS X - breaks precompiled headers */ |