bs_machThreadFromNSThread will cause mach port leak?

[holybin]

thread_t bs_machThreadFromNSThread(NSThread *nsthread) {
    char name[256];
    mach_msg_type_number_t count;
    thread_act_array_t list;
    task_threads(mach_task_self(), &list, &count);
    
    NSTimeInterval currentTimestamp = [[NSDate date] timeIntervalSince1970];
    NSString *originName = [nsthread name];
    [nsthread setName:[NSString stringWithFormat:@"%f", currentTimestamp]];
    
    if ([nsthread isMainThread]) {
        return (thread_t)main_thread_id;
    }
    
    for (int i = 0; i < count; ++i) {
        pthread_t pt = pthread_from_mach_thread_np(list[i]);
        if ([nsthread isMainThread]) {
            if (list[i] == main_thread_id) {
                return list[i];
            }
        }
        if (pt) {
            name[0] = '\0';
            pthread_getname_np(pt, name, sizeof name);
            if (!strcmp(name, [nsthread name].UTF8String)) {
                [nsthread setName:originName];
                return list[i];
            }
        }
    }
    
    [nsthread setName:originName];
    return pthread_mach_thread_np(pthread_self());
}

this method will cause mach port leak