“取消关联"来自完成端口的套接字 [英] "Un-associate" socket from completion port

问题描述

CreateIoCompletionPort() 用于将套接字与完成端口相关联.但是，当这个套接字关闭时，我需要从完成端口取消关联"它.我该怎么做?

CreateIoCompletionPort() is used to associate a socket with a completion port. However, when this socket is closed, then I need to "un-associate" it from the completion port. How can I do that?

推荐答案

与 I/O 完成端口关联的句柄在关闭句柄时从端口中删除.在网络套接字的情况下，通过调用 closesocket().

A handle that is associated with an I/O Completion Port is removed from the port when the handle is closed. In case of a network socket, the handle is closed by calling closesocket().

CreateIoCompletionPort 的文档包含对资源的说明处理:

The documentation for CreateIoCompletionPort contains remarks on resource handling:

FileHandle 参数中传递的句柄可以是任何支持重叠 I/O 的句柄.最常见的是，这是由 CreateFile<打开的句柄/strong> 函数使用 FILE_FLAG_OVERLAPPED 标志(例如，文件、邮件槽和管道).由其他函数创建的对象，例如 socket也可以与 I/O 完成端口相关联.有关使用套接字的示例，请参阅 AcceptEx.一个句柄只能与一个 I/O 完成端口相关联，并且在建立关联后，该句柄一直与该 I/O 完成端口相关联，直到它关闭.

The handle passed in the FileHandle parameter can be any handle that supports overlapped I/O. Most commonly, this is a handle opened by the CreateFile function using the FILE_FLAG_OVERLAPPED flag (for example, files, mail slots, and pipes). Objects created by other functions such as socket can also be associated with an I/O completion port. For an example using sockets, see AcceptEx. A handle can be associated with only one I/O completion port, and after the association is made, the handle remains associated with that I/O completion port until it is closed.

...

I/O 完成端口句柄以及与该特定 I/O 完成端口关联的每个文件句柄都称为对 I/O 完成端口的引用.当没有更多的引用时，I/O 完成端口被释放.因此，必须正确关闭所有这些句柄以释放 I/O 完成端口及其相关的系统资源.满足这些条件后，通过调用CloseHandle 函数.

The I/O completion port handle and every file handle associated with that particular I/O completion port are known as references to the I/O completion port. The I/O completion port is released when there are no more references to it. Therefore, all of these handles must be properly closed to release the I/O completion port and its associated system resources. After these conditions are satisfied, close the I/O completion port handle by calling the CloseHandle function.

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