Boost.Asio套接字析构函数关闭连接? [英] Boost.Asio socket destructor closes connection?

问题描述

boost::asio::ip::tcp::socket的析构函数到底做什么?即使在精读Boost文档和源代码后，我也无法告诉我是否需要使用

What exactly does the destructor of boost::asio::ip::tcp::socket do? I can't tell, even after scouring Boost docs and source code, if I need to use

socket->shutdown(boost::asio::ip::tcp::socket::shutdown_both);
socket->close();

致电

delete socket;

我需要手动关闭套接字，还是析构函数处理此事?

Do I need to close the socket manually, or does the destructor handle this?

推荐答案

套接字被销毁后，

When a socket is destroyed, it will be closed as-if by socket.close(ec) during the destruction of the socket.

I/O对象(例如socket)源自 basic_io_object .在 basic_io_object析构函数，destroy()将在I/O对象的I/O服务上调用，并传入implementation_type的实例，I/O对象的服务将在该实例上运行.对于套接字，destroy()将在满足

I/O objects, such as socket, derive from basic_io_object. Within the basic_io_object destructor, destroy() will be invoked on the I/O object's I/O service, passing in an instance of the implementation_type on which the I/O object's service will operate. In the case of socket, destroy() will be invoked on a type that fulfills the SocketService type requirement, closing the underlying socket. In the documentation below, a is an instance of a socket service class, and b is an instance of the implementation_type for the socket service class:

a.destroy(b):

[...]隐式取消异步操作，就像通过调用a.close(b, ec)一样.

a.close(b, ec):

如果a.is_open()为true，则使所有未完成的异步操作尽快完成.取消操作的处理程序应传递错误代码error::operation_aborted.

If a.is_open() is true, causes any outstanding asynchronous operations to complete as soon as possible. Handlers for cancelled operations shall be passed the error code error::operation_aborted.

帖子:!a.is_open(b).

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