include/begin_code.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 22 Mar 2006 04:51:44 +0000
changeset 1574 0fd72308659e
parent 1573 2422ca15ba42
child 1595 4aa7df2476e7
permissions -rw-r--r--
Default to use the visibility attribute, on gcc (is this okay?)
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2004 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Library General Public
     7     License as published by the Free Software Foundation; either
     8     version 2 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Library General Public License for more details.
    14 
    15     You should have received a copy of the GNU Library General Public
    16     License along with this library; if not, write to the Free
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 /* This file sets things up for C dynamic library function definitions,
    24    static inlined functions, and structures aligned at 4-byte alignment.
    25    If you don't like ugly C preprocessor code, don't look at this file. :)
    26 */
    27 
    28 /* This shouldn't be nested -- included it around code only. */
    29 #ifdef _begin_code_h
    30 #error Nested inclusion of begin_code.h
    31 #endif
    32 #define _begin_code_h
    33 
    34 /* Some compilers use a special export keyword */
    35 #ifndef DECLSPEC
    36 # if defined(__BEOS__)
    37 #  if defined(__GNUC__)
    38 #   define DECLSPEC	__declspec(dllexport)
    39 #  else
    40 #   define DECLSPEC	__declspec(export)
    41 #  endif
    42 # elif defined(__WIN32__)
    43 #  ifdef __BORLANDC__
    44 #   ifdef BUILD_SDL
    45 #    define DECLSPEC 
    46 #   else
    47 #    define DECLSPEC	__declspec(dllimport)
    48 #   endif
    49 #  else
    50 #   define DECLSPEC	__declspec(dllexport)
    51 #  endif
    52 # elif defined(__OS2__)
    53 #  ifdef __WATCOMC__
    54 #   ifdef BUILD_SDL
    55 #    define DECLSPEC	__declspec(dllexport)
    56 #   else
    57 #    define DECLSPEC
    58 #   endif
    59 #  else
    60 #   define DECLSPEC
    61 #  endif
    62 # else
    63 #  if defined(__GNUC__)
    64 #   define DECLSPEC	__attribute__ ((visibility("default")))
    65 #  else
    66 #   define DECLSPEC
    67 #  endif
    68 # endif
    69 #endif
    70 
    71 /* By default SDL uses the C calling convention */
    72 #ifndef SDLCALL
    73 #if defined(__WIN32__) && !defined(__GNUC__)
    74 #define SDLCALL __cdecl
    75 #else
    76 #ifdef __OS2__
    77 /* But on OS/2, we use the _System calling convention */
    78 /* to be compatible with every compiler */
    79 #define SDLCALL _System
    80 #else
    81 #define SDLCALL
    82 #endif
    83 #endif
    84 #endif /* SDLCALL */
    85 
    86 /* Removed DECLSPEC on Symbian OS because SDL cannot be a DLL in EPOC */
    87 #ifdef __SYMBIAN32__ 
    88 #undef DECLSPEC
    89 #define DECLSPEC
    90 #endif /* __SYMBIAN32__ */
    91 
    92 /* Force structure packing at 4 byte alignment.
    93    This is necessary if the header is included in code which has structure
    94    packing set to an alternate value, say for loading structures from disk.
    95    The packing is reset to the previous value in close_code.h
    96  */
    97 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)
    98 #ifdef _MSC_VER
    99 #pragma warning(disable: 4103)
   100 #endif
   101 #ifdef __BORLANDC__
   102 #pragma nopackwarning
   103 #endif
   104 #pragma pack(push,4)
   105 #elif (defined(__MWERKS__) && defined(__MACOS__))
   106 #pragma options align=mac68k4byte
   107 #pragma enumsalwaysint on
   108 #endif /* Compiler needs structure packing set */
   109 
   110 /* Set up compiler-specific options for inlining functions */
   111 #ifndef SDL_INLINE_OKAY
   112 #ifdef __GNUC__
   113 #define SDL_INLINE_OKAY
   114 #else
   115 /* Add any special compiler-specific cases here */
   116 #if defined(_MSC_VER) || defined(__BORLANDC__) || \
   117     defined(__DMC__) || defined(__SC__) || \
   118     defined(__WATCOMC__) || defined(__LCC__) || \
   119     defined(__DECC)
   120 #ifndef __inline__
   121 #define __inline__	__inline
   122 #endif
   123 #define SDL_INLINE_OKAY
   124 #else
   125 #if !defined(__MRC__) && !defined(_SGI_SOURCE)
   126 #define __inline__ inline
   127 #define SDL_INLINE_OKAY
   128 #endif /* Not a funky compiler */
   129 #endif /* Visual C++ */
   130 #endif /* GNU C */
   131 #endif /* SDL_INLINE_OKAY */
   132 
   133 /* If inlining isn't supported, remove "__inline__", turning static
   134    inlined functions into static functions (resulting in code bloat
   135    in all files which include the offending header files)
   136 */
   137 #ifndef SDL_INLINE_OKAY
   138 #define __inline__
   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 /* ! MacOS X - breaks precompiled headers */