提升Asio Peek和完成条件 [英] Boost Asio Peek and Completion Condition

问题描述

我正在使用Boost Asio建立套接字连接.我想在不使用缓冲区的情况下偷看缓冲区中的数据，并且我想使用完成条件来确保必要时可以停止阻塞调用.

I am using Boost Asio to set up a socket connection. I would like to peek at the data in the buffer without consuming it, and I would like to use a completion condition to ensure that I could stop the blocking call if necessary.

我可以从可能的message_flags之一是 basic_stream_socket :: message_peek .但是，此调用将阻塞，直到读取至少一个字节或发生错误为止.我可以从阅读:

One of the possible message_flags is basic_stream_socket::message_peek. However, this call blocks until at least one byte is read or an error occurs. I can get the completion condition functionality from read:

template<
    typename SyncReadStream,
    typename MutableBufferSequence,
    typename CompletionCondition>
std::size_t read(
    SyncReadStream & s,
    const MutableBufferSequence & buffers,
    CompletionCondition completion_condition,
    boost::system::error_code & ec);

我可以提供一个completion_condition方法，该方法在继续之前检查是否应中止该呼叫.

I can provide a completion_condition method which checks if the call should be aborted before continuing.

我的问题是:是否可以在同一方法调用中获取message_flags参数和completement_condition参数?

My question is this: Is there a way to get a message_flags parameter and a completion_condition parameter in the same method call?

推荐答案

我想在不使用缓冲区的情况下偷看缓冲区中的数据， 我想使用一个完成条件来确保我可以 如有必要，停止阻止通话.

I would like to peek at the data in the buffer without consuming it, and I would like to use a completion condition to ensure that I could stop the blocking call if necessary.

不要这样做.使用异步方法，例如async_read()和async_write().要停止未完成的异步操作，请使用 .

Don't do this. Use asynchronous methods such as async_read() and async_write(). To stop outstanding asynchronous operations, use cancel().

这篇关于提升Asio Peek和完成条件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！