getclassid.patch

diff --git a/quickjs/quickjs.c b/quickjs/quickjs.c
index 48aeffc62..8afc4caa1 100644
--- a/quickjs/quickjs.c
+++ b/quickjs/quickjs.c
@@ -54034,3 +54034,14 @@ void JS_AddIntrinsicTypedArrays(JSContext *ctx)
     JS_AddIntrinsicAtomics(ctx);
 #endif
 }
+
+JSClassID JS_GetClassID(JSValueConst v)
+{
+    JSObject *p;
+
+    if (JS_VALUE_GET_TAG(v) != JS_TAG_OBJECT)
+        return 0;
+    p = JS_VALUE_GET_OBJ(v);
+    assert(p != 0);
+    return p->class_id;
+}
diff --git a/quickjs/quickjs.h b/quickjs/quickjs.h
index d4a5cd311..054019147 100644
--- a/quickjs/quickjs.h
+++ b/quickjs/quickjs.h
@@ -497,6 +497,7 @@ typedef struct JSClassDef {
 } JSClassDef;
 
 JSClassID JS_NewClassID(JSClassID *pclass_id);
+JSClassID JS_GetClassID(JSValueConst v);
 int JS_NewClass(JSRuntime *rt, JSClassID class_id, const JSClassDef *class_def);
 int JS_IsRegisteredClass(JSRuntime *rt, JSClassID class_id);