quickjs-tart

commit c9f9ef0a9c443dcd1e3d471c8b3fb1635f0960b4
parent fc877fb13b554e551fa3063bda6c5dad42e4ba38
Author: Fabrice Bellard <fabrice@bellard.org>
Date:   Tue,  2 Jan 2024 16:08:48 +0100

make JS_NewClassID thread safe

Diffstat:
M
quickjs/quickjs.c
 | 
11
++++++++++-

1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/quickjs/quickjs.c b/quickjs/quickjs.c
@@ -3388,16 +3388,25 @@ static inline BOOL JS_IsEmptyString(JSValueConst v)
 
 /* JSClass support */
 
+#ifdef CONFIG_ATOMICS
+static pthread_mutex_t js_class_id_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
 /* a new class ID is allocated if *pclass_id != 0 */
 JSClassID JS_NewClassID(JSClassID *pclass_id)
 {
     JSClassID class_id;
-    /* XXX: make it thread safe */
+#ifdef CONFIG_ATOMICS
+    pthread_mutex_lock(&js_class_id_mutex);
+#endif
     class_id = *pclass_id;
     if (class_id == 0) {
         class_id = js_class_id_alloc++;
         *pclass_id = class_id;
     }
+#ifdef CONFIG_ATOMICS
+    pthread_mutex_unlock(&js_class_id_mutex);
+#endif
     return class_id;
 }