thread.c (rb_thread_alone): simplify

This function now also works in more places if ruby_current_thread
is unset.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51275 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 6 deletions

diff --git a/thread.c b/thread.c
index 69cd673674..1b726687a0 100644
--- a/thread.c
+++ b/thread.c
@@ -3048,12 +3048,7 @@ vm_living_thread_num(rb_vm_t *vm)
 int
 rb_thread_alone(void)
 {
-    int num = 1;
-    if (!list_empty(&GET_THREAD()->vm->living_threads)) {
-	num = vm_living_thread_num(GET_THREAD()->vm);
-	thread_debug("rb_thread_alone: %d\n", num);
-    }
-    return num == 1;
+    return vm_living_thread_num(GET_VM()) == 1;
 }
 
 /*