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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 */