1 files changed, 86 insertions, 0 deletions
diff --git a/include/ruby/internal/core/rdata.h b/include/ruby/internal/core/rdata.h
new file mode 100644
index 0000000000..d0a4dc7c83
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+++ b/include/ruby/internal/core/rdata.h
@@ -0,0 +1,86 @@
+#ifndef RBIMPL_RDATA_H                               /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RDATA_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      Defines struct ::RData.
+ */
+#include "ruby/internal/config.h"
+
+#ifdef STDC_HEADERS
+# include <stddef.h>
+#endif
+
+#include "ruby/internal/attr/deprecated.h"
+#include "ruby/internal/attr/warning.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/fl_type.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+#include "ruby/defines.h"
+
+/** @cond INTERNAL_MACRO */
+#ifndef RUBY_UNTYPED_DATA_WARNING
+#define RUBY_UNTYPED_DATA_WARNING 1
+#endif
+
+#define RBIMPL_DATA_FUNC(f) RBIMPL_CAST((void (*)(void *))(f))
+/** @endcond */
+
+/**
+ * This is a value you can set  to ::RData::dfree.  Setting this means the data
+ * was allocated using ::ruby_xmalloc() (or variants), and shall be freed using
+ * ::ruby_xfree().
+ *
+ * @warning  Do not  use this  if you  want to use  system malloc,  because the
+ *           system  and  Ruby  might  or  might  not  share  the  same  malloc
+ *           implementation.
+ */
+#define RUBY_DEFAULT_FREE         RBIMPL_DATA_FUNC(-1)
+
+/**
+ * This is a value you can set  to ::RData::dfree.  Setting this means the data
+ * is managed by  someone else, like, statically allocated.  Of  course you are
+ * on your own then.
+ */
+#define RUBY_NEVER_FREE           RBIMPL_DATA_FUNC(0)
+
+/**
+ * This is  the type of callbacks  registered to ::RData.  The  argument is the
+ * `data` field.
+ */
+typedef void (*RUBY_DATA_FUNC)(void*);
+
+/**
+ * @deprecated
+ *
+ * DO NOT USE: Obsolete "untyped" user data, that is remained only for
+ * the backward compatibility for some wrapper generator gems.
+ */
+struct RData {
+    struct RBasic basic;
+    VALUE fields_obj;
+    VALUE _reserved;
+    void *data;
+    RUBY_DATA_FUNC dmark;
+    RUBY_DATA_FUNC dfree;
+};
+
+#endif /* RBIMPL_RDATA_H */