但它可以保证写完整个缓冲区的内容,否则将报错。 boost::asio::async_write() 是通过调用n次socket.async_write_some() 来实现的,所以代码必须确保在boost::asio::async_write()执行的时候,没有其他的写操作在同一socket上执行。 在调用boost::asio::async_write()的时候,如果指定b
问BOOST Asio async_write_some vs asio::async_write，强制执行一次写入操作EN即使Boost.Asio可以异步处...
Socket::async_read_some和socket::async_receive是一样的,唯一的细小区别是,socket::async_receive提供两种接口,其中一种增加了flags参数。因为绝大多数flags=0,所以这两个函数可以看成没区别。 Socket::async_write_some和socket::async_send也是一样的,唯一的细小区别依然是socket::async_send提供良种接口,其中一...
由于 Future::poll 不是 async 方法,当然你不能使用 await,只能用 poll/poll_next/poll_ready/start_send/poll_flush/poll_close/poll_read/poll_write/poll_shutdown 这些方法了,它们是 Future/Stream/Sink/AsyncRead/AsyncWrite 的方法。 这里需要注意的点,除了上面提到的「永远不要自作主张去返回 Poll::Pendin...
To use it, I need to write another async method, which returns its result asynchronously as well: private async Task<string> FindLargestWebPage(string[] urls) { string largest = null; int largestSize = 0; foreach (string url in urls) { int size = await GetPageSizeAsync(url); if (...
useasync_std::io::{BufRead,BufReader,Write};asyncfnecho(stream:TcpStream)->EcResult<()>{letaddr = stream.peer_addr()?;println!("[{} online]",addr);let(reader,mutwriter)=(&stream,&stream);letreader =BufReader::new(reader);letmutlines = reader.lines();whileletSome(line)= lines.ne...
yield 'wait_write', sock sock.sendall(data) def sock_accept(self, sock): yield 'wait_read', sock return sock.accept() def run(self): while True: if self.tasks_to_run: task = self.tasks_to_run.popleft() try: op, arg = next(task) ...
publicvoidCopyStreamToStream(Stream source, Stream destination){varbuffer =newbyte[0x1000];intnumRead;while((numRead = source.Read(buffer,0, buffer.Length)) !=0){destination.Write(buffer,0, numRead);}} 直观来说,我们反复从一个流中读取数据,然后将结果数据写入另一个流,再从一个流中读取并写入...
For some reason I had the impression that websocket::stream::async_read_some returns one websocket frame per call. This is the case for async_write_some: it transmits a whole frame, but read works differently. As I understood the code the first part of the frame is always read into ...
Now that we’ve discussed how cancellation works, let’s write some code to consume a cancelable async API. Let’s extend our photo upload API by adding an overload that takes a cancellation token. The API signature now looks like the following: ...