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make JS_NewClassID thread safe

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Fabrice Bellard 2024-01-02 16:08:48 +01:00
parent 5c120cd471
commit 8de4538ff3
1 changed files with 10 additions and 1 deletions
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11
quickjs.c
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@ -3384,16 +3384,25 @@ 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;
}