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#ifndef RBIMPL_DLLEXPORT_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_DLLEXPORT_H
/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @copyright This file is a part of the programming language Ruby.
* Permission is hereby granted, to either redistribute and/or
* modify this file, provided that the conditions mentioned in the
* file COPYING are met. Consult the file for details.
* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
* implementation details. Don't take them as canon. They could
* rapidly appear then vanish. The name (path) of this header file
* is also an implementation detail. Do not expect it to persist
* at the place it is now. Developers are free to move it anywhere
* anytime at will.
* @note To ruby-core: remember that this header can be possibly
* recursively included from extension libraries written in C++.
* Do not expect for instance `__VA_ARGS__` is always available.
* We assume C99 for ruby itself but we don't assume languages of
* extension libraries. They could be written in C++98.
* @brief Tweaking visibility of C variables/functions.
*/
#include "ruby/internal/config.h"
#include "ruby/internal/compiler_is.h"
/**
* Declaration of externally visible global variables. Here "externally" means
* they should be visible from extension libraries. Depending on operating
* systems (dynamic linkers, to be precise), global variables inside of a DLL
* may or may not be visible form outside of that DLL by default. This
* declaration manually tweaks that default and ensures the declared variable
* be truly globally visible.
*
* ```CXX
* extern VALUE foo; // hidden on some OS
* RUBY_EXTERN VALUE foo; // ensure visible
* ```
*/
#undef RUBY_EXTERN
#if defined(RUBY_EXPORT)
# define RUBY_EXTERN extern
#elif defined(_WIN32)
# define RUBY_EXTERN extern __declspec(dllimport)
#else
# define RUBY_EXTERN extern
#endif
#ifndef RUBY_SYMBOL_EXPORT_BEGIN
# define RUBY_SYMBOL_EXPORT_BEGIN /* begin */
#endif
#ifndef RUBY_SYMBOL_EXPORT_END
# define RUBY_SYMBOL_EXPORT_END /* end */
#endif
#ifndef RUBY_FUNC_EXPORTED
# define RUBY_FUNC_EXPORTED /* void */
#endif
/** @endcond */
/** Shortcut macro equivalent to `RUBY_SYMBOL_EXPORT_BEGIN extern "C" {`.
* \@shyouhei finds it handy. */
#if defined(__DOXYGEN__)
# define RBIMPL_SYMBOL_EXPORT_BEGIN() /* void */
#elif defined(__cplusplus)
# define RBIMPL_SYMBOL_EXPORT_BEGIN() RUBY_SYMBOL_EXPORT_BEGIN extern "C" {
#else
# define RBIMPL_SYMBOL_EXPORT_BEGIN() RUBY_SYMBOL_EXPORT_BEGIN
#endif
/** Counterpart of #RBIMPL_SYMBOL_EXPORT_BEGIN */
#if defined(__DOXYGEN__)
# define RBIMPL_SYMBOL_EXPORT_END() /* void */
#elif defined(__cplusplus)
# define RBIMPL_SYMBOL_EXPORT_END() } RUBY_SYMBOL_EXPORT_END
#else
# define RBIMPL_SYMBOL_EXPORT_END() RUBY_SYMBOL_EXPORT_END
#endif
#endif /* RBIMPL_DLLEXPORT_H */