mv include/ruby/{impl,internal}

Devs do not love "impl".

include/ruby/internal/event.h

@@ -0,0 +1,75 @@
+#ifndef RBIMPL_EVENT_H                               /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_EVENT_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      Debugging and tracing APIs.
+ */
+#include "ruby/impl/dllexport.h"
+#include "ruby/impl/value.h"
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/* traditional set_trace_func events */
+#define RUBY_EVENT_NONE      0x0000
+#define RUBY_EVENT_LINE      0x0001
+#define RUBY_EVENT_CLASS     0x0002
+#define RUBY_EVENT_END       0x0004
+#define RUBY_EVENT_CALL      0x0008
+#define RUBY_EVENT_RETURN    0x0010
+#define RUBY_EVENT_C_CALL    0x0020
+#define RUBY_EVENT_C_RETURN  0x0040
+#define RUBY_EVENT_RAISE     0x0080
+#define RUBY_EVENT_ALL       0x00ff
+
+/* for TracePoint extended events */
+#define RUBY_EVENT_B_CALL            0x0100
+#define RUBY_EVENT_B_RETURN          0x0200
+#define RUBY_EVENT_THREAD_BEGIN      0x0400
+#define RUBY_EVENT_THREAD_END        0x0800
+#define RUBY_EVENT_FIBER_SWITCH      0x1000
+#define RUBY_EVENT_SCRIPT_COMPILED   0x2000
+#define RUBY_EVENT_TRACEPOINT_ALL    0xffff
+
+/* special events */
+#define RUBY_EVENT_RESERVED_FOR_INTERNAL_USE 0x030000
+
+/* internal events */
+#define RUBY_INTERNAL_EVENT_SWITCH          0x040000
+#define RUBY_EVENT_SWITCH                   0x040000 /* obsolete name. this macro is for compatibility */
+                                         /* 0x080000 */
+#define RUBY_INTERNAL_EVENT_NEWOBJ          0x100000
+#define RUBY_INTERNAL_EVENT_FREEOBJ         0x200000
+#define RUBY_INTERNAL_EVENT_GC_START        0x400000
+#define RUBY_INTERNAL_EVENT_GC_END_MARK     0x800000
+#define RUBY_INTERNAL_EVENT_GC_END_SWEEP   0x1000000
+#define RUBY_INTERNAL_EVENT_GC_ENTER       0x2000000
+#define RUBY_INTERNAL_EVENT_GC_EXIT        0x4000000
+#define RUBY_INTERNAL_EVENT_OBJSPACE_MASK  0x7f00000
+#define RUBY_INTERNAL_EVENT_MASK          0xffff0000
+
+typedef uint32_t rb_event_flag_t;
+typedef void (*rb_event_hook_func_t)(rb_event_flag_t evflag, VALUE data, VALUE self, ID mid, VALUE klass);
+
+#define RB_EVENT_HOOKS_HAVE_CALLBACK_DATA 1
+void rb_add_event_hook(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data);
+int rb_remove_event_hook(rb_event_hook_func_t func);
+
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RBIMPL_EVENT_H */