| Home | Libraries | People | FAQ | More

##### buffered_read_stream::async_read_some

Start an asynchronous read.

###### Synopsis

    template<
        class MutableBufferSequence,
        class ReadHandler>
    DEDUCED
    async_read_some(
        MutableBufferSequence const& buffers,
        ReadHandler&& handler);

###### Description

This function is used to asynchronously read data from the stream. The function call always returns immediately.

###### Parameters

Name | Description
--- | ---
`buffers` | One or more buffers into which the data will be read. Although the buffers object may be copied as necessary, ownership of the underlying memory blocks is retained by the caller, which must guarantee that they remain valid until the handler is called.
`handler` | The completion handler to invoke when the operation completes. The implementation takes ownership of the handler by performing a decay-copy. The equivalent function signature of the handler must be:
    void handler(
        error_code const& error,      // result of operation
        std::size_t bytes_transferred // number of bytes transferred
    );

Regardless of whether the asynchronous operation completes immediately or not, the handler will not be invoked from within this function. Invocation of the handler will be performed in a manner equivalent to using `net::post`.