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begin_code.h
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2014 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 
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 #ifndef SDL_DEPRECATED
37 # if (__GNUC__ >= 4) /* technically, this arrived in gcc 3.1, but oh well. */
38 # define SDL_DEPRECATED __attribute__((deprecated))
39 # else
40 # define SDL_DEPRECATED
41 # endif
42 #endif
43 
44 /* Some compilers use a special export keyword */
45 #ifndef DECLSPEC
46 # if defined(__WIN32__) || defined(__WINRT__)
47 # ifdef __BORLANDC__
48 # ifdef BUILD_SDL
49 # define DECLSPEC
50 # else
51 # define DECLSPEC __declspec(dllimport)
52 # endif
53 # else
54 # define DECLSPEC __declspec(dllexport)
55 # endif
56 # else
57 # if defined(__GNUC__) && __GNUC__ >= 4
58 # define DECLSPEC __attribute__ ((visibility("default")))
59 # elif defined(__GNUC__) && __GNUC__ >= 2
60 # define DECLSPEC __declspec(dllexport)
61 # else
62 # define DECLSPEC
63 # endif
64 # endif
65 #endif
66 
67 /* By default SDL uses the C calling convention */
68 #ifndef SDLCALL
69 #if (defined(__WIN32__) || defined(__WINRT__)) && !defined(__GNUC__)
70 #define SDLCALL __cdecl
71 #else
72 #define SDLCALL
73 #endif
74 #endif /* SDLCALL */
75 
76 /* Removed DECLSPEC on Symbian OS because SDL cannot be a DLL in EPOC */
77 #ifdef __SYMBIAN32__
78 #undef DECLSPEC
79 #define DECLSPEC
80 #endif /* __SYMBIAN32__ */
81 
82 /* Force structure packing at 4 byte alignment.
83  This is necessary if the header is included in code which has structure
84  packing set to an alternate value, say for loading structures from disk.
85  The packing is reset to the previous value in close_code.h
86  */
87 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)
88 #ifdef _MSC_VER
89 #pragma warning(disable: 4103)
90 #endif
91 #ifdef __BORLANDC__
92 #pragma nopackwarning
93 #endif
94 #ifdef _M_X64
95 /* Use 8-byte alignment on 64-bit architectures, so pointers are aligned */
96 #pragma pack(push,8)
97 #else
98 #pragma pack(push,4)
99 #endif
100 #endif /* Compiler needs structure packing set */
101 
102 #ifndef SDL_INLINE
103 #if defined(__GNUC__)
104 #define SDL_INLINE __inline__
105 #elif defined(_MSC_VER) || defined(__BORLANDC__) || \
106  defined(__DMC__) || defined(__SC__) || \
107  defined(__WATCOMC__) || defined(__LCC__) || \
108  defined(__DECC)
109 #define SDL_INLINE __inline
110 #ifndef __inline__
111 #define __inline__ __inline
112 #endif
113 #else
114 #define SDL_INLINE inline
115 #ifndef __inline__
116 #define __inline__ inline
117 #endif
118 #endif
119 #endif /* SDL_INLINE not defined */
120 
121 #ifndef SDL_FORCE_INLINE
122 #if defined(_MSC_VER)
123 #define SDL_FORCE_INLINE __forceinline
124 #elif ( (defined(__GNUC__) && (__GNUC__ >= 4)) || defined(__clang__) )
125 #define SDL_FORCE_INLINE __attribute__((always_inline)) static __inline__
126 #else
127 #define SDL_FORCE_INLINE static SDL_INLINE
128 #endif
129 #endif /* SDL_FORCE_INLINE not defined */
130 
131 /* Apparently this is needed by several Windows compilers */
132 #if !defined(__MACH__)
133 #ifndef NULL
134 #ifdef __cplusplus
135 #define NULL 0
136 #else
137 #define NULL ((void *)0)
138 #endif
139 #endif /* NULL */
140 #endif /* ! Mac OS X - breaks precompiled headers */