Question

我正在尝试创建对成员函数的异步调用，该成员函数作为std :: function类型参数获取。但是，出现以下错误：

Error   C2672   'std::invoke': no matching overloaded function found
Error   C2893   Failed to specialize function template 'unknown-type std::invoke(_Callable &&,_Types &&...) noexcept(<expr>)'

代码看起来像这样

void clientMessageHandler(MyBaseObject * objectBase, char * buffer, size_t size)
{

}

   void MyObject::dispatcher(std::function<void(MyBaseObject *, char *, size_t)> pfnMessageHandler)
        {
        }

void MyObject::recv(std::function<void(MyBaseObject *, char *, size_t)> pfnMessageHandler)
{
    m_dispatchThread = std::thread(&MyObject::dispatcher, pfnMessageHandler);
}

主要：

MyObject object;
object.recv(clientMessageHandler);

Answer 1

MyObject::dispatcher是static成员函数吗？否则，您需要提供一个对象，以使用std::thread对其进行调用：

m_dispatchThread = std::thread(&MyObject::dispatcher, this, pfnMessageHandler);
//                                                    ^^^^
//               The object to call the member function on

使用std :: function作为参数通过std :: thread调用可调用对象

1 个答案: