我不想声明 dequeueLoop 一个静态函数

如果你想使用pthreads，那么你需要一个静态或非成员函数作为入口点。你可以传递指向你的对象的指针到这个函数，使用它作为非静态成员函数的trampoline：

If you want to use pthreads, then you'll need a static or non-member function for the entry point. You can pass a pointer to your object to this function, using it as a trampoline into the non-static member function:

static void * dequeueEntry(void * self) {
    return static_cast<CameraManager*>(self)->dequeueLoop();
}

dequeueThreadId = pthread_create(
    &dequeueThread, NULL, 
    &CameraManager::dequeueEntry, // <-- pointer to trampoline function
    this);                        // <-- pointer to object for member function

或者，如果你有一个现代编译器，你可以使用标准线程库：

Alternatively, if you have a modern compiler, you could use the standard thread library instead:

std::thread thread(&CameraManager::dequeLoop, this);