IABSD.fr/xenocara/lib/mesa/include/c99_compat.h

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• Author : jsg
  Date : 2023-01-28 08:56:19
  Hash : b5d82fed
  Message : Merge Mesa 22.3.4

• lib/mesa/include/c99_compat.h

• /**************************************************************************
   *
   * Copyright 2007-2013 VMware, Inc.
   * All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sub license, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice (including the
   * next paragraph) shall be included in all copies or substantial portions
   * of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
   * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
   * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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   **************************************************************************/
  
  #include "no_extern_c.h"
  
  #ifndef _C99_COMPAT_H_
  #define _C99_COMPAT_H_
  
  
  /*
   * MSVC hacks.
   */
  #if defined(_MSC_VER)
  
  #  if _MSC_VER < 1900
  #    error "Microsoft Visual Studio 2015 or higher required"
  #  endif
  
     /*
      * XXX: MSVC has a `__restrict` keyword, but it also has a
      * `__declspec(restrict)` modifier, so it is impossible to define a
      * `restrict` macro without interfering with the latter.  Furthermore the
      * MSVC standard library uses __declspec(restrict) under the _CRTRESTRICT
      * macro.  For now resolve this issue by redefining _CRTRESTRICT, but going
      * forward we should probably should stop using restrict, especially
      * considering that our code does not obbey strict aliasing rules any way.
      */
  #  include <crtdefs.h>
  #  undef _CRTRESTRICT
  #  define _CRTRESTRICT
  #endif
  
  
  /*
   * C99 restrict keyword
   *
   * See also:
   * - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
   */
  #ifndef restrict
  #  ifndef __cplusplus
       /* Use C99 restrict keyword */
  #  elif defined(__GNUC__)
  #    define restrict __restrict__
  #  elif defined(_MSC_VER)
  #    define restrict __restrict
  #  else
  #    define restrict /* */
  #  endif
  #endif
  
  
  /* Simple test case for debugging */
  #if 0
  static inline const char *
  test_c99_compat_h(const void * restrict a,
                    const void * restrict b)
  {
     return __func__;
  }
  #endif
  
  
  #endif /* _C99_COMPAT_H_ */