Move HEAD_LOCK to while begin

Author: rruuaanng

Python/pystate.c

@@ -792,11 +792,11 @@ interpreter_clear(PyInterpreterState *interp, PyThreadState *tstate)
     // Clear the current/main thread state last.
     INTERP_HEAD_LOCK(interp);
     PyThreadState *p = interp->threads.head;
+    HEAD_UNLOCK(&_PyRuntime);
     while (p != NULL) {
         // See https://github.com/python/cpython/issues/102126
         // Must be called without HEAD_LOCK held as it can deadlock
         // if any finalizer tries to acquire that lock.
-        HEAD_UNLOCK(&_PyRuntime);
         PyThreadState_Clear(p);
         p = p->next;
     }