include/begin_code.h
author Sam Lantinga <slouken@libsdl.org>
Sun, 18 Aug 2013 23:18:11 -0700
changeset 7657 7a8955fe2f63
parent 7191 75360622e65f
child 7665 4c0a6cfe27a0
permissions -rw-r--r--
Fixed warnings building with gcc 2 and gcc 4 on Haiku
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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/**
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 *  \file begin_code.h
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 *
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 *  This file sets things up for C dynamic library function definitions,
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 *  static inlined functions, and structures aligned at 4-byte alignment.
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 *  If you don't like ugly C preprocessor code, don't look at this file. :)
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 */
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/* This shouldn't be nested -- included it around code only. */
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#ifdef _begin_code_h
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#error Nested inclusion of begin_code.h
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#endif
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#define _begin_code_h
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/* Some compilers use a special export keyword */
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#ifndef DECLSPEC
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# if defined(__WIN32__)
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#  ifdef __BORLANDC__
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#   ifdef BUILD_SDL
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#    define DECLSPEC
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#   else
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#    define DECLSPEC    __declspec(dllimport)
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#   endif
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#  else
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#   define DECLSPEC __declspec(dllexport)
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#  endif
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# else
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#  if defined(__GNUC__) && __GNUC__ >= 4
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#   define DECLSPEC __attribute__ ((visibility("default")))
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#  elif defined(__GNUC__) && __GNUC__ >= 2
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#   define DECLSPEC __declspec(dllexport)
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#  else
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#   define DECLSPEC
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#  endif
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# endif
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#endif
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/* By default SDL uses the C calling convention */
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#ifndef SDLCALL
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#if defined(__WIN32__) && !defined(__GNUC__)
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#define SDLCALL __cdecl
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#else
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#define SDLCALL
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#endif
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#endif /* SDLCALL */
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/* Removed DECLSPEC on Symbian OS because SDL cannot be a DLL in EPOC */
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#ifdef __SYMBIAN32__
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#undef DECLSPEC
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#define DECLSPEC
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#endif /* __SYMBIAN32__ */
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/* Force structure packing at 4 byte alignment.
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   This is necessary if the header is included in code which has structure
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   packing set to an alternate value, say for loading structures from disk.
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   The packing is reset to the previous value in close_code.h
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 */
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#if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)
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#ifdef _MSC_VER
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#pragma warning(disable: 4103)
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#endif
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#ifdef __BORLANDC__
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#pragma nopackwarning
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#endif
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#ifdef _M_X64
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/* Use 8-byte alignment on 64-bit architectures, so pointers are aligned */
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#pragma pack(push,8)
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#else
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#pragma pack(push,4)
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#endif
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#endif /* Compiler needs structure packing set */
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/* Set up compiler-specific options for inlining functions */
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#ifndef SDL_INLINE_OKAY
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#ifdef __GNUC__
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#define SDL_INLINE_OKAY
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#else
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/* Add any special compiler-specific cases here */
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#if defined(_MSC_VER) || defined(__BORLANDC__) || \
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    defined(__DMC__) || defined(__SC__) || \
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    defined(__WATCOMC__) || defined(__LCC__) || \
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    defined(__DECC)
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#ifndef __inline__
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#define __inline__  __inline
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#endif
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#define SDL_INLINE_OKAY
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#else
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#if !defined(__MRC__) && !defined(_SGI_SOURCE)
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#ifndef __inline__
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#define __inline__ inline
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#endif
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#define SDL_INLINE_OKAY
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#endif /* Not a funky compiler */
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#endif /* Visual C++ */
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#endif /* GNU C */
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#endif /* SDL_INLINE_OKAY */
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/* If inlining isn't supported, remove "__inline__", turning static
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   inlined functions into static functions (resulting in code bloat
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   in all files which include the offending header files)
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*/
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#ifndef SDL_INLINE_OKAY
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#define __inline__
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#endif
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#ifndef SDL_FORCE_INLINE
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#if defined(_MSC_VER)
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#define SDL_FORCE_INLINE __forceinline
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#elif ( (defined(__GNUC__) && (__GNUC__ >= 4)) || defined(__clang__) )
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#define SDL_FORCE_INLINE __attribute__((always_inline)) static inline
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#else
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#define SDL_FORCE_INLINE static __inline__
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#endif
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#endif
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/* Apparently this is needed by several Windows compilers */
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#if !defined(__MACH__)
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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#else
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#define NULL ((void *)0)
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#endif
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#endif /* NULL */
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#endif /* ! Mac OS X - breaks precompiled headers */