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begin_code.h
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/
begin_code.h
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@libsdl.org
*/
/**
* @file begin_code.h
* This file sets things up for C dynamic library function definitions,
* static inlined functions, and structures aligned at 4-byte alignment.
* If you don't like ugly C preprocessor code, don't look at this file. :)
*/
/**
* @file begin_code.h
* This shouldn't be nested -- included it around code only.
*/
#ifdef _begin_code_h
#error Nested inclusion of begin_code.h
#endif
#define _begin_code_h
/**
* @def DECLSPEC
* Some compilers use a special export keyword
*/
#ifndef DECLSPEC
# if defined(__BEOS__) || defined(__HAIKU__)
# if defined(__GNUC__)
# define DECLSPEC __declspec(dllexport)
# else
# define DECLSPEC __declspec(export)
# endif
# elif defined(__WIN32__)
# ifdef __BORLANDC__
# ifdef BUILD_SDL
# define DECLSPEC
# else
# define DECLSPEC __declspec(dllimport)
# endif
# else
# define DECLSPEC __declspec(dllexport)
# endif
# elif defined(__OS2__)
# ifdef __WATCOMC__
# ifdef BUILD_SDL
# define DECLSPEC __declspec(dllexport)
# else
# define DECLSPEC
# endif
# elif defined (__GNUC__) && __GNUC__ < 4
# /* Added support for GCC-EMX <v4.x */
# /* this is needed for XFree86/OS2 developement */
# /* F. Ambacher(anakor@snafu.de) 05.2008 */
# ifdef BUILD_SDL
# define DECLSPEC __declspec(dllexport)
# else
# define DECLSPEC
# endif
# else
# define DECLSPEC
# endif
# else
# if defined(__GNUC__) && __GNUC__ >= 4
# define DECLSPEC __attribute__ ((visibility("default")))
# else
# define DECLSPEC
# endif
# endif
#endif
/**
* @def SDLCALL
* By default SDL uses the C calling convention
*/
#ifndef SDLCALL
# if defined(__WIN32__) && !defined(__GNUC__)
# define SDLCALL __cdecl
# elif defined(__OS2__)
# if defined (__GNUC__) && __GNUC__ < 4
# /* Added support for GCC-EMX <v4.x */
# /* this is needed for XFree86/OS2 developement */
# /* F. Ambacher(anakor@snafu.de) 05.2008 */
# define SDLCALL _cdecl
# else
# /* On other compilers on OS/2, we use the _System calling convention */
# /* to be compatible with every compiler */
# define SDLCALL _System
# endif
# else
# define SDLCALL
# endif
#endif /* SDLCALL */
#ifdef __SYMBIAN32__
#ifndef EKA2
#undef DECLSPEC
#define DECLSPEC
#elif !defined(__WINS__)
#undef DECLSPEC
#define DECLSPEC __declspec(dllexport)
#endif /* !EKA2 */
#endif /* __SYMBIAN32__ */
/**
* @file begin_code.h
* Force structure packing at 4 byte alignment.
* This is necessary if the header is included in code which has structure
* packing set to an alternate value, say for loading structures from disk.
* The packing is reset to the previous value in close_code.h
*/
#if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)
#ifdef _MSC_VER
#pragma warning(disable: 4103)
#endif
#ifdef __BORLANDC__
#pragma nopackwarning
#endif
#pragma pack(push,4)
#elif (defined(__MWERKS__) && defined(__MACOS__))
#pragma options align=mac68k4byte
#pragma enumsalwaysint on
#endif /* Compiler needs structure packing set */
/**
* @def SDL_INLINE_OKAY
* Set up compiler-specific options for inlining functions
*/
#ifndef SDL_INLINE_OKAY
#ifdef __GNUC__
#define SDL_INLINE_OKAY
#else
/* Add any special compiler-specific cases here */
#if defined(_MSC_VER) || defined(__BORLANDC__) || \
defined(__DMC__) || defined(__SC__) || \
defined(__WATCOMC__) || defined(__LCC__) || \
defined(__DECC) || defined(__EABI__)
#ifndef __inline__
#define __inline__ __inline
#endif
#define SDL_INLINE_OKAY
#else
#if !defined(__MRC__) && !defined(_SGI_SOURCE)
#ifndef __inline__
#define __inline__ inline
#endif
#define SDL_INLINE_OKAY
#endif /* Not a funky compiler */
#endif /* Visual C++ */
#endif /* GNU C */
#endif /* SDL_INLINE_OKAY */
/**
* @def __inline__
* If inlining isn't supported, remove "__inline__", turning static
* inlined functions into static functions (resulting in code bloat
* in all files which include the offending header files)
*/
#ifndef SDL_INLINE_OKAY
#define __inline__
#endif
/**
* @def NULL
* Apparently this is needed by several Windows compilers
*/
#if !defined(__MACH__)
#ifndef NULL
#ifdef __cplusplus
#define NULL 0
#else
#define NULL ((void *)0)
#endif
#endif /* NULL */
#endif /* ! Mac OS X - breaks precompiled headers */