split internal.h into files

One day, I could not resist the way it was written.  I finally started
to make the code clean.  This changeset is the beginning of a series of
housekeeping commits.  It is a simple refactoring; split internal.h into
files, so that we can divide and concur in the upcoming commits.  No
lines of codes are either added or removed, except the obvious file
headers/footers.  The generated binary is identical to the one before.

1 files changed, 44 insertions, 0 deletions

diff --git a/internal/thread.h b/internal/thread.h
new file mode 100644
index 0000000000..568351e6cb
--- /dev/null
+++ b/internal/thread.h
@@ -0,0 +1,44 @@
+#ifndef INTERNAL_THREAD_H /* -*- C -*- */
+#define INTERNAL_THREAD_H
+/**
+ * @file
+ * @brief      Internal header for Thread.
+ * @author     \@shyouhei
+ * @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.
+ */
+
+/* thread.c */
+#define COVERAGE_INDEX_LINES    0
+#define COVERAGE_INDEX_BRANCHES 1
+#define COVERAGE_TARGET_LINES    1
+#define COVERAGE_TARGET_BRANCHES 2
+#define COVERAGE_TARGET_METHODS  4
+#define COVERAGE_TARGET_ONESHOT_LINES 8
+
+VALUE rb_obj_is_mutex(VALUE obj);
+VALUE rb_suppress_tracing(VALUE (*func)(VALUE), VALUE arg);
+void rb_thread_execute_interrupts(VALUE th);
+VALUE rb_get_coverages(void);
+int rb_get_coverage_mode(void);
+VALUE rb_default_coverage(int);
+VALUE rb_thread_shield_new(void);
+VALUE rb_thread_shield_wait(VALUE self);
+VALUE rb_thread_shield_release(VALUE self);
+VALUE rb_thread_shield_destroy(VALUE self);
+int rb_thread_to_be_killed(VALUE thread);
+void rb_mutex_allow_trap(VALUE self, int val);
+VALUE rb_uninterruptible(VALUE (*b_proc)(VALUE), VALUE data);
+VALUE rb_mutex_owned_p(VALUE self);
+
+RUBY_SYMBOL_EXPORT_BEGIN
+/* Temporary.  This API will be removed (renamed). */
+VALUE rb_thread_io_blocking_region(rb_blocking_function_t *func, void *data1, int fd);
+
+/* thread.c (export) */
+int ruby_thread_has_gvl_p(void); /* for ext/fiddle/closure.c */
+RUBY_SYMBOL_EXPORT_END
+
+#endif /* INTERNAL_THREAD_H */