* thread.c (is_ruby_native_thread): check properly. [ruby-dev:31166]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@13104 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/thread.c b/thread.c
index 69f3b29e9..aec4340d5 100644
--- a/thread.c
+++ b/thread.c
@@ -3002,5 +3002,8 @@ Init_Thread(void)
 int
 is_ruby_native_thread(void)
 {
-    return Qtrue;
+    rb_thread_t *rb_thread_check_ptr(rb_thread_t *ptr);
+    rb_thread_t *th = ruby_thread_from_native();
+
+    return th ? Qtrue : Qfalse;
 }