Question

using socket with the overlapped operation selected the event-based completion notification; Have 2 events, one for data, the other to cancel long send/recv:

 HANDLE events[] = { m_hDataEvent, m_hInterruptEvent };

然后打电话给WSASend,

 WSASend(m_Socket, &DataBuf, 1, NULL, 0, &SendOverlapped, NULL);

和继继继继继继

 WSAWaitForMultipleEvents(2, events, FALSE, INFINITE, FALSE);

which is setup to return on any one event signaled. Now assume send is in progress, and m_hInterruptEvent is signaled. WSAWaitForMultipleEvents returns, technically the function calling send can return as well and delete internally allocated buffers.

我不清楚的是,WSASend可能仍然在背景中运作,删除缓冲在最好的情况下会造成数据腐败。

< energ> 如果插座需要立即用于其它东西, 那么阻止背景发送/ 接收的正确方式是什么?

I looked at the CanceleIO (), 但是 MSDN 从未提及它与索凯茨的关系, 它是否只与基于文件 IO 一起工作?

Answer 1

尝试在发送后取消它是没有道理的。即使您成功, 您也会遇到问题, 因为接收程序不会知道传输被中断。您的新信件将会被错误地误解为旧信件的结尾。

如果您觉得需要取消长期发送, 您也许应该查看您的应用程序设计。

Send in chunks and check for cancellation in between chunks. Ensure you have a way of communicating to the receiver that the transmission was cancelled.
Close the socket to cancel. Again, ensure the client has a way to know that this is an interrupted transmission (for example if the client knows the total length in advance they will recognise an interrupted transmission).
Just wait for it to succeed in the background and don t worry. If you have urgent messages use a separate connection for them.

对于您的特殊问题“ 强/ 强”, “ 阻止背景发送/ 接收的适当方式是什么, 如果套接字需要立即用于其它东西, ”

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