asio包含errorcode参数的函数,不会抛出异常 可以尝试connect之后,判断错误码, boost::asio::error::...
asio异步发送复杂的地方在于: 不能连续调用异步发送接口async_write,因为async_write内部是不断调用async_write_some,直到所有的数据发送完成为止。由于async_write调用之后就直接返回了,如果第一次调用async_write发送一个较大的包时,马上又再调用async_write发送一个很小的包时,有可能这时第一次的async_write还在循环...
你要是看过basic_stream_socket的文档,里面提到async_write_some不能保证将所有要发送的数据都发出去。并且提到如果想这样做,需要使用boost asio的async_write Remarks The write operation may not transmit all of the data to the peer. Consider using the async_write function if you need to ensure th...
async_write是一个异步写操作,它用于将数据写入到套接字中。boost::asio::strand只能保证在同一个strand中的操作按顺序执行,但它无法控制异步操作的执行线程。 要实现async_write的线程安全,可以采用以下方法: 使用boost::asio::strand将所有的异步写操作封装起来,确保它们在同一个strand中执行。这样可以保证这...
只有看boost源码才能弄明白发生了什么。首先我是将vector里面写入了数据,然后用boost::asio::buffer将vector构造成了mutable_buffer_1对象。 参考该文档的重载形式:http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/reference/buffer/overload24.html ...
I recently had a client where we did a gather write of 1 million dispersed 128 byte buffers. It works (despite what other issue #194 says) but good god is it unbelievably slow. It would appear ASIO is calling malloc and free per buffer, ...
boost::asio::async_write(m_socket, boost::asio::buffer(hbs, sizeof(hbs)), boost::bind(&Client, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); The big difference is that the normalwritecan block until all is written, whileasync_writereturns immedia...
I noticed only just now that async_write_some and async_send (second overload) functions in boost::asio are completely the same: async_write_some defenition: ... template <typename ConstBufferSequence, typename WriteHandler> BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, void (boost::system::er...
boost::asio::buffer(async_buffer->data(),4) 于是就死活发不出去,,, 最后看到网上的博文,他是因为使用vector作buff,每次发送的数据小于他指定的数据,就是因为他给的buff参数小于vector实际的参数,于是我灵机一动,改成了这样: boost::asio::async_write(socket_,boost::asio::buffer(async_buffer->data()...
void do_write(std::size_t length){ //shared_from_this() 返回一个当前类的std::share_ptr auto self(shared_from_this()); //发送指定字节的数据 asio::async_write(socket_, asio::buffer(data_, length), [this, self](std::error_code ec, std::size_t /*length*/){ ...